 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| ? 2009 microchip technology inc. ds22100d-page 1 23a256/23K256 device selection table features: ? max. clock 20 mhz ? low-power cmos technology: - read current: 3 ma at 1 mhz - standby current: 4 a max. at +85c ? 32,768 x 8-bit organization ? 32-byte page ?hold pin ? flexible operating modes: - byte read and write - page mode (32 byte page) - sequential mode ? sequential read/write ? high reliability ? temperature ranges supported: ? pb-free and rohs compliant, halogen free pin function table description: the microchip technology inc. 23x256 are 256 kbit serial sram devices. the memory is accessed via a simple serial peripheral interface (spi) compatible serial bus. the bus signals required are a clock input (sck) plus separate data in (si) and data out (so) lines. access to the device is controlled through a chip select (cs ) input. communication to the device can be paused via the hold pin (hold ). while the device is paused, transitions on its inputs will be ignored, with the exception of chip select, allowing the host to service higher priority interrupts. the 23x256 is available in standard packages including 8-lead pdip and soic, and advanced packaging including 8-lead tssop. package types (not to scale) part number v cc range page size temp. ranges packages 23K256 2.7-3.6v 32 byte i, e p, sn, st 23a256 1.5-1.95v 32 byte i p, sn, st - industrial (i): - automotive (e): -40 c -40 c to to +85 c +125 c name function cs chip select input so serial data output v ss ground si serial data input sck serial clock input hold hold input v cc supply voltage cs so nc v ss 1 2 3 4 8 7 6 5 v cc hold sck si pdip/soic/tssop (p, sn, st) 256k spi bus low-power serial sram
23a256/23K256 ds22100d-page 2 ? 2009 microchip technology inc. 1.0 electrical characteristics absolute maximum ratings (?) v cc ............................................................................................................................... ..............................................4.5v all inputs and outputs w.r.t. v ss ......................................................................................................... -0.3v to v cc +0.3v storage temperature ............................................................................................................ .....................-65c to 150c ambient temperature under bias ................................................................................................. ..............-40c to 125c esd protection on all pins ..................................................................................................... ......................................2kv table 1-1: dc characteristics ? notice : stresses above those listed under ?absolute maximum ratings? may cause permanent damage to the device. this is a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operational listings of this specification is not implied. exposure to maximum rating conditions for an extended period of time may affect device reliability. dc characteristics industrial (i): t a = -40c to +85c automotive (e): t a = -40c to +125c param. no. sym. characteristic min. typ (1) max. units test conditions d001 v cc supply voltage 1.5 ? 1.95 v 23a256 (i-temp) d001 v cc supply voltage 2.7 ? 3.6 v 23K256 (i,e-temp) d002 v ih high-level input voltage .7 v cc ?v cc +0.3 v d003 v il low-level input voltage -0.3 ? 0.2xv cc v d004 v ol low-level output voltage ??0.2vi ol = 1 ma d005 v oh high-level output voltage v cc -0.5 ? ? v i oh = -400 a d006 i li input leakage current ??0.5 acs = v cc , v in = v ss or v cc d007 i lo output leakage current ??0.5 acs = v cc , v out = v ss or v cc d008 i cc read operating current ? ? ? ? ? ? 3 6 10 ma ma ma f clk = 1 mhz; so = o f clk = 10 mhz; so = o f clk = 20 mhz; so = o d009 i ccs standby current ? ? ? 200 1 5 500 4 10 na a a cs = v cc = 1.8v, inputs tied to v cc or v ss cs = v cc = 3.6v, inputs tied to v cc or v ss cs = v cc = 3.6v, inputs tied to v cc or v ss @ 125c d010 c int input capacitance 7 pf v cc = 0v, f = 1 mhz, ta = 25c (note 1) d011 v dr ram data retention voltage (2) ?1.2?v note 1: this parameter is periodically sampled and not 100% tested. typical measurements taken at room temperature (25c). 2: this is the limit to which v dd can be lowered without losing ram data. this parameter is periodically sampled and not 100% tested. ? 2009 microchip technology inc. ds22100d-page 3 23a256/23K256 table 1-2: ac characteristics ac characteristics industrial (i): t a = -40c to +85c automotive (e): t a = -40c to +125c param. no. sym. characteristic min. max. units test conditions 1f clk clock frequency ? ? ? ? 10 16 16 20 mhz mhz mhz mhz v cc = 1.5v (i-temp) v cc = 1.8v (i-temp) v cc = 3.0v (e-temp) v cc = 3.0v (i-temp) 2t css cs setup time 50 32 32 25 ? ? ? ? ns ns ns ns v cc = 1.5v (i-temp) v cc = 1.8v (i-temp) v cc = 3.0v (e-temp) v cc = 3.0v (i-temp) 3t csh cs hold time 50 50 50 50 ? ? ? ? ns ns ns ns v cc = 1.5v (i-temp) v cc = 1.8v (i-temp) v cc = 3.0v (e-temp) v cc = 3.0v (i-temp) 4t csd cs disable time 50 32 32 25 ? ? ? ? ns ns ns ns v cc = 1.5v (i-temp) v cc = 1.8v (i-temp) v cc = 3.0v (e-temp) v cc = 3.0v (i-temp) 5 tsu data setup time 10 10 10 10 ? ? ? ? ns ns ns ns v cc = 1.5v (i-temp) v cc = 1.8v (i-temp) v cc = 3.0v (e-temp) v cc = 3.0v (i-temp) 6t hd data hold time 10 10 10 10 ? ? ? ? ns ns ns ns v cc = 1.5v (i-temp) v cc = 1.8v (i-temp) v cc = 3.0v (e-temp) v cc = 3.0v (i-temp) 7t r clk rise time ? 2 us note 1 8t f clk fall time ? 2 us note 1 9t hi clock high time 50 32 32 25 ? ? ? ? ns ns ns ns v cc = 1.5v (i-temp) v cc = 1.8v (i-temp) v cc = 3.0v (e-temp) v cc = 3.0v (i-temp) 10 t lo clock low time 50 32 32 25 ? ? ? ? ns ns ns ns v cc = 1.5v (i-temp) v cc = 1.8v (i-temp) v cc = 3.0v (e-temp) v cc = 3.0v (i-temp) 11 t cld clock delay time 50 32 32 25 ? ? ? ? ns ns ns ns v cc = 1.5v (i-temp) v cc = 1.8v (i-temp) v cc = 3.0v (e-temp) v cc = 3.0v (i-temp) 12 t v output valid from clock low ? ? ? ? 50 32 32 25 ns ns ns ns v cc = 1.5v (i-temp) v cc = 1.8v (i-temp) v cc = 3.0v (e-temp) v cc = 3.0v (i-temp) 13 t ho output hold time 0 ? ns note 1 note 1: this parameter is periodically sampled and not 100% tested. 23a256/23K256 ds22100d-page 4 ? 2009 microchip technology inc. table 1-3: ac test conditions 14 t dis output disable time ? ? ? ? 20 20 20 20 ns ns ns ns v cc = 1.5v (i-temp) v cc = 1.8v (i-temp) v cc = 3.0v (e-temp) v cc = 3.0v (i-temp) 15 t hs hold setup time 10 ? ns ? 16 t hh hold hold time 10 ? ns ? 17 t hz hold low to output high-z 10 ? ns ? 18 t hv hold high to output valid ? 50 ns ? table 1-2: ac characteristics (continued) ac characteristics industrial (i): t a = -40c to +85c automotive (e): t a = -40c to +125c param. no. sym. characteristic min. max. units test conditions note 1: this parameter is periodically sampled and not 100% tested. ac waveform: input pulse level 0.1 v cc to 0.9 v cc input rise/fall time 5 ns operating temperature -40c to +125c c l = 100 pf ? timing measurement reference level: input 0.5 v cc output 0.5 v cc ? 2009 microchip technology inc. ds22100d-page 5 23a256/23K256 figure 1-1: hold timing figure 1-2: serial input timing figure 1-3: serial output timing cs sck so si hold 16 15 15 16 17 17 don?t care 5 high-impedance n + 2 n + 1 n n - 1 n n + 2 n + 1 n n n - 1 cs sck si so 6 5 8 7 11 3 lsb in msb in high-impedance 2 4 cs sck so 10 9 12 msb out lsb out 3 14 don?t care si 13 23a256/23K256 ds22100d-page 6 ? 2009 microchip technology inc. 2.0 functional description 2.1 principles of operation the 23x256 is a 32,768-byte serial sram designed to interface directly with the serial peripheral interface (spi) port of many of today?s popular microcontroller families, including microchip?s pic ? microcontrollers. it may also interface with microcontrollers that do not have a built-in spi port by using discrete i/o lines programmed properly in firmware to match the spi protocol. the 23x256 contains an 8-bit instruction register. the device is accessed via the si pin, with data being clocked in on the rising edge of sck. the cs pin must be low and the hold pin must be high for the entire operation. table 2-1 contains a list of the possible instruction bytes and format for device operation. all instructions, addresses and data are transferred msb first, lsb last. data (si) is sampled on the first rising edge of sck after cs goes low. if the clock line is shared with other peripheral devices on the spi bus, the user can assert the hold input and place the 23x256 in ?hold? mode. after releasing the hold pin, operation will resume from the point when the hold was asserted. 2.2 modes of operation the 23a256/23K256 has three modes of operation that are selected by setting bits 7 and 6 in the status register. the modes of operation are byte, page and burst. byte operation ? is selected when bits 7 and 6 in the status register are set to 00 . in this mode, the read/ write operations are limited to only one byte. the command followed by the 16-bit address is clocked into the device and the data to/from the device is transferred on the next 8 clocks (figure 2-1, figure 2-2). page operation ? is selected when bits 7 and 6 in the status register are set to 10 . the 23a256/23K256 has 1024 pages of 32 bytes. in this mode, the read and write operations are limited to within the addressed page (the address is automatically incremented internally). if the data being read or written reaches the page boundary, then the internal address counter will increment to the start of the page (figure 2-3, figure 2-4). sequential operation ? is selected when bits 7 and 6 in the status register are set to 01 . sequential opera- tion allows the entire array to be written to and read from. the internal address counter is automatically incremented and page boundaries are ignored. when the internal address counter reaches the end of the array, the address counter will roll over to 0x0000 (figure 2-5, figure 2-6). 2.3 read sequence the device is selected by pulling cs low. the 8-bit read instruction is transmitted to the 23x256 followed by the 16-bit address, with the first msb of the address being a ?don?t care? bit. after the correct read instruction and address are sent, the data stored in the memory at the selected address is shifted out on the so pin. if operating in page mode, after the first byte of data is shifted out, the next memory location on the page can be read out by continuing to provide clock pulses. this allows for 32 consecutive address reads. after the 32nd address read the internal address counter wraps back to the byte 0 address in that page. if operating in sequential mode, the data stored in the memory at the next address can be read sequentially by continuing to provide clock pulses. the internal address pointer is automatically incremented to the next higher address after each byte of data is shifted out. when the highest address is reached (7fffh), the address counter rolls over to address 0000h, allowing the read cycle to be continued indefinitely. the read operation is terminated by raising the cs pin (figure 2-1). 2.4 write sequence prior to any attempt to write data to the 23x256, the device must be selected by bringing cs low. once the device is selected, the write command can be started by issuing a write instruction, followed by the 16-bit address, with the first msb of the address being a ?don?t care? bit, and then the data to be written. a write is terminated by the cs being brought high. if operating in page mode, after the initial data byte is shifted in, additional bytes can be shifted into the device. the address pointer is automatically incremented. this operation can continue for the entire page (32 bytes) before data will start to be overwritten. if operating in sequential mode, after the initial data byte is shifted in, additional bytes can be clocked into the device. the internal address pointer is automati- cally incremented. when the address pointer reaches the highest address (7fffh), the address counter rolls over to (0000h). this allows the operation to continue indefinitely, however, previous data will be overwritten. ? 2009 microchip technology inc. ds22100d-page 7 23a256/23K256 figure 2-1: byte read sequence figure 2-2: byte write sequence table 2-1: instruction set instruction name instruction format description read 0000 0011 read data from memory array beginning at selected address write 0000 0010 write data to memory array beginning at selected address rdsr 0000 0101 read status register wrsr 0000 0001 write status register so si sck cs 0 234567891011 21222324252627282930 31 1 01 0 0 0 0 01 15 14 13 12 210 76543210 instruction 16-bit address data out high-impedance so si cs 9 1011 21222324252627282930 31 00 0 0 0 0 01 15 14 13 12 210 76543210 instruction 16-bit address data byte high-impedance sck 0 234567 18 23a256/23K256 ds22100d-page 8 ? 2009 microchip technology inc. figure 2-3: page read sequence figure 2-4: page write sequence 76543210 page x, word y si cs 9 1011 21222324252627282930 31 15 14 13 12 210 16-bit address sck 0 234567 1 8 so cs 76543210 page x, word 0 sck 32 34 35 36 37 38 39 33 76543210 page x, word 31 76543210 page x, word y+1 page x, word y so high impedance si 01 0 0 0 0 01 instruction si cs 9 1011 21222324252627282930 31 15 14 13 12 210 76543210 16-bit address sck 0 234567 18 cs si 76543210 page x, word 0 76543210 page x, word 31 76543210 page x, word y+1 page x, word y page x, word y sck 32 34 35 36 37 38 39 33 00 0 0 0 0 01 instruction ? 2009 microchip technology inc. ds22100d-page 9 23a256/23K256 figure 2-5: sequential read sequence si cs 9 1011 21222324252627282930 31 15 14 13 12 210 76543210 instruction 16-bit address page x, word y sck 0 234567 18 so cs 76543210 page x+1, word 1 sck 76543210 page x+1, word 0 76543210 page x, word 31 so cs 76543210 page x+n, word 31 sck 76543210 page x+n, word 1 76543210 page x+1, word 31 so si si 01 0 0 0 0 01 23a256/23K256 ds22100d-page 10 ? 2009 microchip technology inc. figure 2-6: sequential write sequence si cs 9 1011 21222324252627282930 31 00 0 0 0 0 01 15 14 13 12 210 76543210 instruction 16-bit address data byte 1 sck 0 234567 18 si cs 41 42 43 46 47 76543210 data byte n sck 32 34 35 36 37 38 39 33 40 76543210 data byte 3 76543210 data byte 2 44 45 ? 2009 microchip technology inc. ds22100d-page 11 23a256/23K256 2.5 read status register instruction ( rdsr ) the read status register instruction ( rdsr ) provides access to the status register. the status register may be read at any time. the status register is formatted as follows: table 2-2: status register the mode bits indicate the operating mode of the sram. the possible modes of operation are: 0 0 = byte mode (default operation) 1 0 = page mode 0 1 = sequential mode 1 1 = reserved write and read commands are shown in figure 2-7 and figure 2-8. the hold bit enables the hold pin functionality. it must be set to a ? 0 ? before hold pin is brought low for hold function to work properly. setting hold to ? 1 ? disables feature. bits 1 through 5 are reserved and should always be set to ? 0 ?. see figure 2-7 for the rdsr timing sequence. figure 2-7: read status register timing sequence ( rdsr ) 76543210 w/r w/r ? ? ? ? ? w/r mode mode 00000 hold w/r = writable/readable. so si cs 91011 12131415 11 0 0 0 0 00 7654 2 10 instruction data from status register high-impedance sck 0 234567 18 3 23a256/23K256 ds22100d-page 12 ? 2009 microchip technology inc. 2.6 write status register instruction ( wrsr ) the write status register instruction ( wrsr ) allows the user to write to the bits in the status register as shown in table 2-2. this allows for setting of the device operating mode. several of the bits in the status register must be cleared to ? 0 ?. see figure 2-8 for the wrsr timing sequence. figure 2-8: write status register timing sequence ( wrsr ) 2.7 power-on state the 23x256 powers on in the following state: ? the device is in low-power standby mode (cs = 1 ) ? a high-to-low-level transition on cs is required to enter active state so si cs 91011 12131415 01 0 0 0 0 00 7654 210 instruction data to status register high-impedance sck 0 234567 18 3 ? 2009 microchip technology inc. ds22100d-page 13 23a256/23K256 3.0 pin descriptions the descriptions of the pins are listed in table 3-1. table 3-1: pin function table 3.1 chip select (cs ) a low level on this pin selects the device. a high level deselects the device and forces it into standby mode. when the device is deselected, so goes to the high- impedance state, allowing multiple parts to share the same spi bus. after power-up, a low level on cs is required, prior to any sequence being initiated. 3.2 serial output (so) the so pin is used to transfer data out of the 23x256. during a read cycle, data is shifted out on this pin after the falling edge of the serial clock. 3.3 serial input (si) the si pin is used to transfer data into the device. it receives instructions, addresses and data. data is latched on the rising edge of the serial clock. 3.4 serial clock (sck) the sck is used to synchronize the communication between a master and the 23x256. instructions, addresses or data present on the si pin are latched on the rising edge of the clock input, while data on the so pin is updated after the falling edge of the clock input. 3.5 hold (hold ) the hold pin is used to suspend transmission to the 23x256 while in the middle of a serial sequence without having to retransmit the entire sequence again. it must be held high any time this function is not being used. once the device is selected and a serial sequence is underway, the hold pin may be pulled low to pause further serial communication without resetting the serial sequence. the hold pin must be brought low while sck is low, otherwise the hold function will not be invoked until the next sck high-to-low transition. the 23x256 must remain selected during this sequence. the si, sck and so pins are in a high- impedance state during the time the device is paused and transitions on these pins will be ignored. to resume serial communication, hold must be brought high while the sck pin is low, otherwise serial communication will not resume. lowering the hold line at any time will tri-state the so line. hold functionality is disabled by the status register bit. name pdip/soic tssop function cs 1 chip select input so 2 serial data output v ss 4ground si 5 serial data input sck 6 serial clock input hold 7 hold input v cc 8 supply voltage 23a256/23K256 ds22100d-page 14 ? 2009 microchip technology inc. 4.0 packaging information 4.1 package marking information t/xxxnnn xxxxxxxx yyww 8-lead pdip 8-lead soic (3.90 mm) xxxxyyww xxxxxxxt nnn i/p 1l7 23K256 0528 example: example: sn 0528 23K256i 1l7 legend: xx...x part number or part number code t temperature (i, e) y year code (last digit of calendar year) yy year code (last 2 digits of calendar year) ww week code (week of january 1 is week ?01?) nnn alphanumeric traceability code (2 characters for small packages) pb-free jedec designator for matte tin (sn) note : for very small packages with no room for the pb-free jedec designator , the marking will only appear on the outer carton or reel label. note : in the event the full microchip part number cannot be marked on one line, it will be carried over to the next line, thus limiting the number of available characters for customer-specific information. 3 e 3 e 3 e 3 e 8-lead tssop example: xxxx tyww nnn k256 i837 1l7 ? 2009 microchip technology inc. ds22100d-page 15 23a256/23K256 !" #$% &" ' ()"&'"!&) &#*& & & # +% &, & !& - '! ! #. # &"#' #% ! & "! ! #% ! & "! !! &$# / !# '! #& .0 1,21 !'! & $ & "! **& "&& ! 3 & ' !&" & 4 # *!( !!& 4 % & &# & && 255***' '5 4 6&! 7,8. '! 9'&! 7 7: ; 7"') % ! 7 < & 1, & & = = ## 4 4!! - 1 !& & = = "# & "# >#& . - - ## 4 >#& . < : 9& -< -? & & 9 - 9 # 4!! < 6 9 #>#& ) ? 9 * 9 #>#& ) < : * + 1 = = - n e1 note 1 d 12 3 a a1 a2 l b1 b e e eb c * , <1 23a256/23K256 ds22100d-page 16 ? 2009 microchip technology inc. ! ""#$%& !' !" #$% &" ' ()"&'"!&) &#*& & & # +% &, & !& - '! ! #. # &"#' #% ! & "! ! #% ! & "! !! &$# '' !# '! #& .0 1,2 1 !'! & $ & "! **& "&& ! .32 % '! ("!" *& "&& (% % ' & " !! 3 & ' !&" & 4 # *!( !!& 4 % & &# & && 255***' '5 4 6&! 99. . '! 9'&! 7 7: ; 7"') % ! 7 < & 1, : 8 & = = ## 4 4!! = = & # %% + = : >#& . ?1, ## 4 >#& . -1, : 9& 1, , '% @ & a = 3 &9& 9 = 3 & & 9 .3 3 & b = #& ) - = # %& b = b # %&1 && ' b = b d n e e e1 note 1 12 3 b a a1 a2 l l1 c h h * , 1 ? 2009 microchip technology inc. ds22100d-page 17 23a256/23K256 ! ""#$%& !' 3 & ' !&" & 4 # *!( !!& 4 % & &# & && 255***' '5 4 23a256/23K256 ds22100d-page 18 ? 2009 microchip technology inc. () )" * ! (+%+ ( ! !" #$% &" ' ()"&'"!&) &#*& & & # '! ! #. # &"#' #% ! & "! ! #% ! & "! !! &$# '' !# - '! #& .0 1,2 1 !'! & $ & "! **& "&& ! .32 % '! ("!" *& "&& (% % ' & " !! 3 & ' !&" & 4 # *!( !!& 4 % & &# & && 255***' '5 4 6&! 99. . '! 9'&! 7 7: ; 7"') % ! 7 < & ? 1, : 8 & = = ## 4 4!! < & # %% = : >#& . ?1, ## 4 >#& . - ## 4 9& - - 3 &9& 9 ? 3 & & 9 .3 3 & b = #& ) = - d n e e1 note 1 12 b e c a a1 a2 l1 l * , ? 2009 microchip technology inc. ds22100d-page 19 23a256/23K256 appendix a: revision history revision a (11/2008) original release. revision b (12/2008) updates; table 1-1, add param. d011. revision c (01/2009) revised section 2.5: added a paragraph. revision d (04/2009) removed preliminary status; revised standby current; revised table 1-1, param. no. d009; revised tssop package marking; revised product id. 23a256/23K256 ds22100d-page 20 ? 2009 microchip technology inc. notes: ? 2009 microchip technology inc. ds22100d-page 21 23a256/23K256 the microchip web site microchip provides online support via our www site at www.microchip.com. this web site is used as a means to make files and information easily available to customers. accessible by using your favorite internet browser, the web site contains the following information: ? product support ? data sheets and errata, application notes and sample programs, design resources, user?s guides and hardware support documents, latest software releases and archived software ? general technical support ? frequently asked questions (faq), technical support requests, online discussion groups, microchip consultant program member listing ? business of microchip ? product selector and ordering guides, latest microchip press releases, listing of seminars and events, listings of microchip sales offices, distributors and factory representatives customer change notification service microchip?s customer notification service helps keep customers current on microchip products. subscribers will receive e-mail notification whenever there are changes, updates, revisions or errata related to a specified product family or development tool of interest. to register, access the microchip web site at www.microchip.com, click on customer change notification and follow the registration instructions. customer support users of microchip products can receive assistance through several channels: ? distributor or representative ? local sales office ? field application engineer (fae) ? technical support ? development systems information line customers should contact their distributor, representative or field application engineer (fae) for support. local sales offices are also available to help customers. a listing of sales offices and locations is included in the back of this document. technical support is available through the web site at: http://support.microchip.com 23a256/23K256 ds22100d-page 22 ? 2009 microchip technology inc. reader response it is our intention to provide you with the best documentation possible to ensure successful use of your microchip prod- uct. if you wish to provide your comments on organization, clarity, subject matter, and ways in which our documentation can better serve you, please fax your comments to the technical publications manager at (480) 792-4150. please list the following information, and use this outline to provide us with your comments about this document. to : technical publications manager re: reader response total pages sent ________ from: name company address city / state / zip / country telephone: (_______) _________ - _________ application (optional): would you like a reply? y n device: literature number: questions: fax: (______) _________ - _________ ds22100d 23a256/23K256 1. what are the best features of this document? 2. how does this document meet your hardware and software development needs? 3. do you find the organization of this document easy to follow? if not, why? 4. what additions to the document do you think would enhance the structure and subject? 5. what deletions from the document could be made without affecting the overall usefulness? 6. is there any incorrect or misleading information (what and where)? 7. how would you improve this document? ? 2009 microchip technology inc. ds22100d-page 23 23a256/23K256 product identification system to order or obtain information, e. g., on pricing or delivery, refer to the factory or the listed sales office . part no. x /xx package tape & reel device device: 23a256 = 23K256 = 256 kbit, 1.8v, spi serial sram 256 kbit, 3.6v, spi serial sram tape & reel: blank = t= standard packaging (tube) tape & reel temperature range: i= e -40 c to+85 c -40 c to+125 c package: p= sn = st = plastic pdip (300 mil body), 8-lead plastic soic (3.90 mml body), 8-lead tssop, 8-lead examples: a) 23K256-i/st = 256 kbit, 3.6v serial sram, industrial temp., tssop package b) 23a256t-i/sn = 256 kbit, 1.8v serial sram, industrial temp., tape & reel, soic package c) 23K256-e/st = 256 kbit, 3.6v serial sram, automotive temp., tssop package ? x tem p range 23a256/23K256 ds22100d-page 24 ? 2009 microchip technology inc. notes: ? 2009 microchip technology inc. ds22100d-page 25 information contained in this publication regarding device applications and the like is provided only for your convenience and may be superseded by updates. it is your responsibility to ensure that your application meets with your specifications. microchip makes no representations or warranties of any kind whether express or implied, written or oral, statutory or otherwise, related to the information, including but not limited to its condition, quality, performance, merchantability or fitness for purpose . microchip disclaims all liability arising from this information and its use. use of microchip devices in life support and/or safety applications is entirely at the buyer?s risk, and the buyer agrees to defend, indemnify and hold harmless microchip from any and all damages, claims, suits, or expenses resulting from such use. no licenses are conveyed, implicitly or otherwise, under any microchip intellectual property rights. trademarks the microchip name and logo, the microchip logo, accuron, dspic, k ee l oq , k ee l oq logo, mplab, pic, picmicro, picstart, rfpic, smartshunt and uni/o are registered trademarks of microchip tec hnology incorporated in the u.s.a. and other countries. filterlab, linear active thermistor, mxdev, mxlab, seeval, smartsensor and the embedded control solutions company are registered trademarks of microchip technology incorporated in the u.s.a. analog-for-the-digital age, appl ication maestro, codeguard, dspicdem, dspicdem.net, dspicworks, dsspeak, ecan, economonitor, fansense, in-circuit serial programming, icsp, icepic, mindi, miwi, mpasm, mplab certified logo, mplib, mplink, mtouch, nanowatt xlp, pickit, picdem, picdem.net, pictail, pic 32 logo, powercal, powerinfo, powermate, powertool, real ice, rflab, select mode, total endurance, tsha rc, wiperlock and zena are trademarks of microchip tec hnology incorporated in the u.s.a. and other countries. sqtp is a service mark of microchip technology incorporated in the u.s.a. all other trademarks mentioned herein are property of their respective companies. ? 2009, microchip technology incorporated, printed in the u.s.a., all rights reserved. printed on recycled paper. note the following details of the code protection feature on microchip devices: ? microchip products meet the specification cont ained in their particular microchip data sheet. ? microchip believes that its family of products is one of the most secure families of its kind on the market today, when used i n the intended manner and under normal conditions. ? there are dishonest and possibly illegal methods used to breach the code protection feature. all of these methods, to our knowledge, require using the microchip produc ts in a manner outside the operating specif ications contained in microchip?s data sheets. most likely, the person doing so is engaged in theft of intellectual property. ? microchip is willing to work with the customer who is concerned about the integrity of their code. ? neither microchip nor any other semiconduc tor manufacturer can guarantee the security of their code. code protection does not mean that we are guaranteeing the product as ?unbreakable.? code protection is constantly evolving. we at microchip are co mmitted to continuously improvin g the code protection features of our products. attempts to break microchip?s code protection feature may be a violation of the digital millennium copyright act. if such acts allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that act. microchip received iso/ts-16949:2002 certification for its worldwide headquarters, design and wafer fabrication facilities in chandler and tempe, arizona; gresham, oregon and design centers in california and india. the company?s quality system processes and procedures are for its pic ? mcus and dspic ? dscs, k ee l oq ? code hopping devices, serial eeproms, microperipherals, nonvolatile memory and analog products. in addition, microchip?s quality system for the design and manufacture of development systems is iso 9001:2000 certified. ds22100d-page 26 ? 2009 microchip technology inc. americas corporate office 2355 west chandler blvd. chandler, az 85224-6199 tel: 480-792-7200 fax: 480-792-7277 technical support: http://support.microchip.com web address: www.microchip.com atlanta duluth, ga tel: 678-957-9614 fax: 678-957-1455 boston westborough, ma tel: 774-760-0087 fax: 774-760-0088 chicago itasca, il tel: 630-285-0071 fax: 630-285-0075 cleveland independence, oh tel: 216-447-0464 fax: 216-447-0643 dallas addison, tx tel: 972-818-7423 fax: 972-818-2924 detroit farmington hills, mi tel: 248-538-2250 fax: 248-538-2260 kokomo kokomo, in tel: 765-864-8360 fax: 765-864-8387 los angeles mission viejo, ca tel: 949-462-9523 fax: 949-462-9608 santa clara santa clara, ca tel: 408-961-6444 fax: 408-961-6445 toronto mississauga, ontario, canada tel: 905-673-0699 fax: 905-673-6509 asia/pacific asia pacific office suites 3707-14, 37th floor tower 6, the gateway harbour city, kowloon hong kong tel: 852-2401-1200 fax: 852-2401-3431 australia - sydney tel: 61-2-9868-6733 fax: 61-2-9868-6755 china - beijing tel: 86-10-8528-2100 fax: 86-10-8528-2104 china - chengdu tel: 86-28-8665-5511 fax: 86-28-8665-7889 china - hong kong sar tel: 852-2401-1200 fax: 852-2401-3431 china - nanjing tel: 86-25-8473-2460 fax: 86-25-8473-2470 china - qingdao tel: 86-532-8502-7355 fax: 86-532-8502-7205 china - shanghai tel: 86-21-5407-5533 fax: 86-21-5407-5066 china - shenyang tel: 86-24-2334-2829 fax: 86-24-2334-2393 china - shenzhen tel: 86-755-8203-2660 fax: 86-755-8203-1760 china - wuhan tel: 86-27-5980-5300 fax: 86-27-5980-5118 china - xiamen tel: 86-592-2388138 fax: 86-592-2388130 china - xian tel: 86-29-8833-7252 fax: 86-29-8833-7256 china - zhuhai tel: 86-756-3210040 fax: 86-756-3210049 asia/pacific india - bangalore tel: 91-80-3090-4444 fax: 91-80-3090-4080 india - new delhi tel: 91-11-4160-8631 fax: 91-11-4160-8632 india - pune tel: 91-20-2566-1512 fax: 91-20-2566-1513 japan - yokohama tel: 81-45-471- 6166 fax: 81-45-471-6122 korea - daegu tel: 82-53-744-4301 fax: 82-53-744-4302 korea - seoul tel: 82-2-554-7200 fax: 82-2-558-5932 or 82-2-558-5934 malaysia - kuala lumpur tel: 60-3-6201-9857 fax: 60-3-6201-9859 malaysia - penang tel: 60-4-227-8870 fax: 60-4-227-4068 philippines - manila tel: 63-2-634-9065 fax: 63-2-634-9069 singapore tel: 65-6334-8870 fax: 65-6334-8850 taiwan - hsin chu tel: 886-3-6578-300 fax: 886-3-6578-370 taiwan - kaohsiung tel: 886-7-536-4818 fax: 886-7-536-4803 taiwan - taipei tel: 886-2-2500-6610 fax: 886-2-2508-0102 thailand - bangkok tel: 66-2-694-1351 fax: 66-2-694-1350 europe austria - wels tel: 43-7242-2244-39 fax: 43-7242-2244-393 denmark - copenhagen tel: 45-4450-2828 fax: 45-4485-2829 france - paris tel: 33-1-69-53-63-20 fax: 33-1-69-30-90-79 germany - munich tel: 49-89-627-144-0 fax: 49-89-627-144-44 italy - milan tel: 39-0331-742611 fax: 39-0331-466781 netherlands - drunen tel: 31-416-690399 fax: 31-416-690340 spain - madrid tel: 34-91-708-08-90 fax: 34-91-708-08-91 uk - wokingham tel: 44-118-921-5869 fax: 44-118-921-5820 w orldwide s ales and s ervice 03/26/09 |
Price & Availability of 23K256
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |