View CAT25C128XA-18-GT3_3493299.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

1 cat25c128/256 document no. 1018, rev. i features 5 mhz spi compatible 1.8 to 5.5 volt operation hardware and software protection low power cmos technology spi modes (0,0 &1,1) industrial and automotive temperature ranges self-timed write cycle 64-byte page write buffer block write protection ?protect 1/4, 1/2 or all of eeprom array 100,000 program/erase cycles 100 year data retention rohs-compliant packages description the cat25c128/256 is a 128k/256k-bit spi serial cmos eeprom internally organized as 16kx8/32kx8 bits. catalysts advanced cmos technology substantially reduces device power requirements. the cat25c128/256 features a 64-byte page write buffer. the device operates via the spi bus serial interface and is enabled through a chip select ( cs ). in addition to the chip select, the clock input (sck), data in (si) and data out (so) are required to access the device. the hold pin may be used to suspend any serial communication without resetting the serial sequence. the cat25c128/256 is designed with software and hardware write protection features including block lock protection. the device is available in 8-pin dip, 8-pin soic, 14-pin tssop and 20-pin tssop packages. pin configuration block diagram sense amps shift registers spi control logic word address buffers i/o control e e prom array column decoders xdec high voltage/ timing control so status register block protect logic control logic data i n storage si cs wp hold sck pin functions pin name function so serial data output sck serial clock wp write protect v cc power supply v ss ground cs chip select si serial data input hold suspends serial input nc no connect **cat25c128 only. ? 2005 by catalyst semiconductor, inc. characteristics subject to change without notice dip package (l) tssop package (y20)** soic package ss so wp v cc hold sck si 1 2 3 4 8 7 6 5 cs so wp cs v cc hold sck si 1 2 3 4 8 7 6 5 v ss tssop package (y14)** so nc nc wp cs si hold nc nc nc sck nc v ss v cc 14 13 12 11 1 2 3 4 5 6 7 10 9 8 so nc nc wp cs si hold nc nc sck so v ss v cc 20 19 18 17 1 2 3 4 5 6 7 8 9 10 16 15 14 13 12 11 nc nc nc nc hold nc nc (v**, x) cat25c128/256 128k/256k-bit spi serial cmos eeprom for ordering information details, see page 11.
cat25c128/256 2 document no. 1018, rev. i absolute maximum ratings* temperature under bias ................. C55 c to +125 c storage temperature ....................... C65 c to +150 c voltage on any pin with respect to v ss 1) ................... C2.0v to +v cc +2.0v v cc with respect to v ss ................................ C2.0v to +7.0v package power dissipation capability (ta = 25 c) ................................... 1.0w lead soldering temperature (10 secs) ............ 300 c output short circuit current (2) ........................ 100 ma *comment stresses above those listed under absolute maximum ratings may cause permanent damage to the device. these are stress ratings only, and functional operation of the device at these or any other conditions outside of those listed in the operational sections of this specification is not implied. exposure to any absolute maximum rating for extended periods may affect device performance and reliability. reliability characteristics symbol parameter min. max. units n end (3) endurance 100,000 cycles/byte t dr (3) data retention 100 years v zap (3) esd susceptibility 2000 volts i lth (3)(4) latch-up 100 ma d.c. operating characteristics v cc = +1.8v to +5.5v, unless otherwise specified. limits symbol parameter min. typ. max. units test conditions i cc1 power supply current 10 ma v cc = 5v @ 5mhz (operating write) so=open; cs=vss i cc2 power supply current 2 ma v cc = 5.0v (operating read) f clk = 5mhz i sb (5) power supply current 1 a cs = v cc (standby) v in = v ss or v cc i li input leakage current 2 a i lo output leakage current 3 av out = 0v to v cc , cs = 0v v il (3) input low voltage -1 v cc x 0.3 v v ih (3) input high voltage v cc x 0.7 v cc + 0.5 v v ol1 output low voltage 0.4 v v oh1 output high voltage v cc - 0.8 v v ol2 output low voltage 0.2 v 1.8v v cc <2.7v v oh2 output high voltage v cc -0.2 v i ol = 150 a i oh = -100 a note: (1) the minimum dc input voltage is C0.5v. during transitions, inputs may undershoot to C2.0v for periods of less than 20 ns. ma ximum dc voltage on output pins is v cc +0.5v, which may overshoot to v cc +2.0v for periods of less than 20 ns. (2) output shorted for no more than one second. no more than one output shorted at a time. (3) this parameter is tested initially and after a design or process change that affects the parameter according to appropriate aec-q100 and jedec test methods. (4) latch-up protection is provided for stresses up to 100 ma on address and data pins from C1v to v cc +1v. (5) maximum standby current (i sb ) = 10 a for the automotive and extended automotive temperature range. 4.5v v cc <5.5v i ol = 3.0ma i oh = -1.6ma
3 cat25c128/256 document no. 1018, rev. i limits vcc= v cc =v cc = 1.8v-5.5v 2.5v-5.5v 4.5v-5.5v test symbol parameter min. max. min. max. min. max. units conditions t su data setup time 100 70 35 ns t h data hold time 100 70 35 ns t wh sck high time 250 150 80 ns t wl sck low time 250 150 80 ns f sck clock frequency dc 1 dc 3 dc 5 mhz t lz hold to output low z 50 50 50 ns t ri (1) input rise time 2 2 2 s t fi (1) input fall time 2 2 2 s t hd hold setup time 250 250 40 ns t cd hold hold time 250 250 40 ns t wc write cycle time 10 10 5 ms t v output valid from clock low 250 250 80 ns t ho output hold time 0 0 0 ns t dis output disable time 250 250 100 ns t hz hold to output high z 150 150 50 ns t cs cs high time 1000 250 200 ns t css cs setup time 1000 250 100 ns t csh cs hold time 500 250 100 ns t wps wp setup time 50 50 50 ns t wph wp hold time 50 50 50 ns note: (1) this parameter is tested initially and after a design or process change that affects the parameter. a.c. characteristics (cat25c128) c l = 50pf pin capacitance (1) applicable over recommended operating range from t a =25?c, f=1.0 mhz, vcc=+5.0v (unless otherwise noted). symbol test conditions max. units conditions c out output capacitance (so) 8 pf v out =0v c in input capacitance ( cs , sck, si, wp , hold )6 pf v in =0v
cat25c128/256 4 document no. 1018, rev. i limits vcc= v cc =v cc = vcc= 1.8v-5.5v 2.5v-5.5v 2.7v-5.5v 4.5v-5.5v test symbol parameter min. max. min. max. min. max. min. max. units conditions t su data setup time 500 100 70 35 ns t h data hold time 500 100 70 35 ns t wh sck high time 2500 250 150 80 ns t wl sck low time 2500 250 150 80 ns f sck clock frequency dc 0.2 dc 2.0 dc 2.5 dc 5 mhz t lz hold to output low z 100 50 50 50 ns t ri (3) input rise time 2 2 2 2 s t fi (3) input fall time 2 2 2 2 s t hd hold setup time 250 100 100 40 ns t cd hold hold time 250 100 100 40 ns t wc write cycle time 10 10 10 5 ms t v output valid from clock low 250 200 200 80 ns t ho output hold time 0 0 0 0 ns t dis output disable time 250 200 200 100 ns t hz hold to output high z 150 100 100 50 ns t cs cs high time 100 100 100 100 ns t css cs setup time 100 100 100 100 ns t csh cs hold time 100 100 100 100 ns t wps wp setup time 50 50 50 50 ns t wph wp hold time 50 50 50 50 ns note: (3) this parameter is tested initially and after a design or process change that affects the parameter. a.c. characteristics (cat25c256) c l = 50pf
5 cat25c128/256 document no. 1018, rev. i functional description the cat25c128/256 supports the spi bus data transmission protocol. the synchronous serial peripheral interface (spi) helps the cat25c128/256 to interface directly with many of todays popular microcontrollers. the cat25c128/256 contains an 8-bit instruction register. (the instruction set and the operation codes are detailed in the instruction set table) after the device is selected with cs going low, the first byte will be received. the part is accessed via the si pin, with data being clocked in on the rising edge of sck. the first byte contains one of the six op-codes that define the operation to be performed. pin description si: serial input si is the serial data input pin. this pin is used to input all opcodes, byte addresses, and data to be written to the 25c32/64. input data is latched on the rising edge of the serial clock. so: serial output so is the serial data output pin. this pin is used to transfer data out of the cat25c128/256. during a read cycle, data is shifted out on the falling edge of the serial clock. sck: serial clock sck is the serial clock pin. this pin is used to synchronize the communication between the microcontroller and the cat25c128/256. opcodes, byte addresses, or data present on the si pin are latched on the rising edge of the sck. data on the so pin is updated on the falling edge of the sck. cs cs cs cs cs : chip select cs is the chip select pin. cs low enables the cat25c128/ 256 and cs high disables the cat25c128/256. cs high takes the so output pin to high impedance and forces the devices into a standby mode (unless an internal write operation is underway). the cat25c128/256 draws zero current in the standby mode. a high to low transition on cs is required prior to any sequence being initiated. a low to high transition on cs after a valid write sequence is what initiates an internal write cycle. instruction opcode operation wren 0000 0110 enable write operations wrdi 0000 0100 disable write operations rdsr 0000 0101 read status register wrsr 0000 0001 write status register read 0000 0011 read data from memory write 0000 0010 write data to memory instruction set figure 1. sychronous data timing note: dashed line= mode (1, 1) valid in v ih v il t css v ih v il v ih v il v oh v ol hi-z t su t h t wh t wl t v t cs t csh t ho t dis hi-z cs sck si so t ri t fi
cat25c128/256 6 document no. 1018, rev. i protected unprotected status wpen wp wp wp wp wp wel blocks blocks register 0 x 0 protected protected protected 0 x 1 protected writable writable 1 low 0 protected protected protected 1 low 1 protected writable protected x high 0 protected protected protected x high 1 protected writable writable write protect enable operation wp wp wp wp wp : write protect wp is the write protect pin. the write protect pin will allow normal read/write operations when held high. when wp is tied low and the wpen bit in the status register is set to 1, all write operations to the status register are inhibited. wp going low while cs is still low will interrupt a write to the status register. if the internal write cycle has already been initiated, wp going low will have no effect on any write operation to the status register. the wp pin function is blocked when the wpen bit is set to 0. hold hold hold hold hold : hold the hold pin is used to pause transmission to the cat25c128/256 while in the middle of a serial sequence without having to re-transmit entire sequence at a later time. to pause, hold must be brought low while sck is low. the so pin is in a high impedance state during the time the part is paused, and transitions on the si pins will be ignored. to resume communication, hold is brought high, while sck is low. (hold should be held high any time this function is not being used.) hold may be tied high directly to v cc or tied to v cc through a resistor. figure 9 illustrates hold timing sequence. status register the status register indicates the status of the device. the rdy (ready) bit indicates whether the cat25c128/ 256 is busy with a write operation. when set to 1 a write cycle is in progress and when set to 0 the device indicates it is ready. this bit is read only. the wel (write enable) bit indicates the status of the write enable latch . when set to 1, the device is in a write enable state and when set to 0 the device is in a write disable state. the wel bit can only be set by the wren instruction and can be reset by the wrdi instruction. the bp0 and bp1 (block protect) bits indicate which blocks are currently protected. these bits are set by the user issuing the wrsr instruction. the user is allowed to protect quarter of the memory, half of the memory or the entire memory by setting these bits. once protected the user may only read from the protected portion of the array. these bits are non-volatile. status register bits array address protection bp1 bp0 protected 0 0 none no protection 0 1 25c128: 3000-3fff quarter array protection 25c256: 6000-7fff 1 0 25c128: 2000-3fff half array protection 25c256: 4000-7fff 1 1 25c128: 0000-3fff full array protection 25c256: 0000-7fff block protection bits 76543210 wpen x x x bp1 bp0 wel rdy status register
7 cat25c128/256 document no. 1018, rev. i the wpen (write protect enable) is an enable bit for the wp pin. the wp pin and wpen bit in the status register control the programmable hardware write protect fea- ture. hardware write protection is enabled when wp is low and wpen bit is set to high. the user cannot write to the status register (including the block protect bits and the wpen bit) and the block protected sections in the memory array when the chip is hardware write pro- tected. only the sections of the memory array that are not block protected can be written. hardware write protection is disabled when either wp pin is high or the wpen bit is zero. device operation write enable and disable the cat25c128/256 contains a write enable latch. this latch must be set before any write operation. the device powers up in a write disable state when v cc is applied. wren instruction will enable writes (set the latch) to the device. wrdi instruction will disable writes (reset the latch) to the device. disabling writes will protect the device against inadvertent writes. read sequence the part is selected by pulling cs low. the 8-bit read instruction is transmitted to the cat25c128/256, followed by the 16-bit address(the three most significant bit is dont care for 25c256 and four most significant bits are don't care for 25c128). 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. 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 (7fffh for 25c256 and 3fffh for 25c128) is reached, the address counter rolls over to 0000h allowing the read cycle to be continued indefinitely. the readoperation is terminated by pulling the cs high. sk si cs so 00000 110 high impedance figure 2. wren instruction timing sk si cs so 00000 100 high impedance note: dashed line= mode (1, 1) ? figure 3. wrdi instruction timing
cat25c128/256 8 document no. 1018, rev. i properly set. also, for a successful write operation the address of the memory location(s) to be programmed must be outside the protected address field location selected by the block protection level. byte write once the device is in a write enable state, the user may proceed with a write sequence by setting the cs low, issuing a write instruction via the si line, followed by the 16-bit address (the three most significant bits are dont care for 25c256 and four most significant bits are don't care for 25c128), and then the data to be written. programming will start after the cs is brought high. figure 6 illustrates byte write sequence. during an internal write cycle, all commands will be ignored except the rdsr (read status register) instruction. to read the status register, rdsr instruction should be sent. the contents of the status register are shifted out on the so line. the status register may be read at any time even during a write cycle. read sequece is illus- trated in figure 4. reading status register is illustrated in figure 5. write sequence the cat25c128/256 powers up in a write disable state. prior to any write instructions, the wren instruc- tion must be sent to cat25c128/256. the device goes into write enable state by pulling the cs low and then clocking the wren instruction into cat25c128/256. the cs must be brought high after the wren instruction to enable writes to the device. if the write operation is initiated immediately after the wren instruction without cs being brought high, the data will not be written to the array because the write enable latch will not have been sk si so 0000001 1 byte address* 012345678910 2021222324252627282930 7 6 5 4 3 2 1 0 *please check the instruction set table for address cs opcode data out msb high impedance note: dashed line= mode (1, 1) figure 4. read instruction timing figure 5. rdsr timing 012345678 10 911121314 sck si data out msb high impedance opcode so 7 6 5 4 3 2 1 0 cs 00 0 00 1 01 note: dashed line= mode (1, 1)
9 cat25c128/256 document no. 1018, rev. i address counter reaches the end of the page and clock continues, the counter will roll over to the first address of the page and overwrite any data that may have been written. the cat25c128/256 is automatically returned to the write disable state at the completion of the write cycle. figure 8 illustrates the page write sequence. to write to the status register, the wrsr instruction should be sent. only bit 2, bit 3 and bit 7 of the status register can be written using the wrsr instruction. figure 7 illustrates the sequence of writing to status register. the status register can be read to determine if the write cycle is still in progress. if bit 0 of the status register is set at 1, write cycle is in progress. if bit 0 is set at 0, the device is ready for the next instruction. page write the cat25c128/256 features page write capability. after the first initial byte the host may continue to write up to 64 bytes of data to the cat25c128/256. after each byte of data is received, six lower order address bits are internally incremented by one; the high order bits of address will remain constant. the only restriction is that the 64 bytes must reside on the same page. if the sk si so 0 0 0 0 0 0 1 0 address d7 d6 d5 d4 d3 d2 d1 d0 012345678 212223242526272829303 cs opcode data in high impedance note: dashed line= mode (1, 1) figure 6. write instruction timing figure 7. wrsr timing 012345678 10 911121314 sck si msb high impedance data in 15 so cs 7 6 5 4 3 2 10 00 0 000 0 1 opcode note: dashed line= mode (1, 1) figure 8. page write instruction timing sk si so 0 0 0 0 0 0 1 0 address data byte 1 012345678 212223 24-31 32-39 data byte 2 data byte 3 data byte n cs opcode 7..1 0 24+(n-1)x8-1..24+(n-1)x8 24+nx8-1 data in high impedance note: dashed line= mode (1, 1)
cat25c128/256 10 document no. 1018, rev. i cs sck hold so t cd t hd t hd t cd t lz t hz high impedance note: dashed line= mode (1, 1) figure 9. hold hold hold hold hold timing figure 10. wp wp wp wp wp timing t csh sck wp t wps t wph note: dashed line= mode (1, 1) design considerations if an invalid op code is received, no data will be shifted into the cat25c128/256, and the serial output pin (so) will remain in a high impedence state until the falling edge of cs is detected again. when powering down, the supply should be taken down to 0v, so that the cat25c128/256 will be reset when power is ramped back up. if this is not possible, then, following a brown-out episode, the cat25c128/256 can be reset by refreshing the contents of the status register (see application note an10). the cat25c128/256 powers up in a write disable state and in a low power standby mode. a wren instruction must be issued to perform any writes to the device after power up. also,on power up cs should be brought low to enter a ready state and receive an instruction. after a successful byte/page write or status register write the cat25c128/256 goes into a write disable mode. cs must be set high after the proper number of clock cycles to start an internal write cycle. access to the array during an internal write cycle is ignored and program-ming is continued. on power up, so is in a high impedance.
11 cat25c128/256 document no. 1018, rev. i prefix device # suffix 25c128 v i product number 25c128: 128k 25c256: 256k operating voltage blank (v cc = 2.5v to 5.5v 1.8 (v cc = 1.8v to 5.5v) - 1.8 cat temperature range i = industrial (-40 ? c to +85 ? c) a = automotive (-40 ? c to +105 ? c) optional company id e = extended (-40 ? c to +125 ? c) **cat25c128 only package l: pdip v: soic, jedec** x: soic, eiaj (4) y14: 14-pin tssop** y20: 20-pin tssop** tape & reel t: tape & reel 2: 2000/reel 3: 3000/reel lead finish blank: matte-tin g: nipdau t3 ?g ordering information notes: (1) all packages are rohs-compliant (lead-free, halogen-free). (2) the standard finish is nipdau pre-plated (ppf). (3) the device used in the above example is a cat25c128vi-1.8-gt3 (soic, industrial temperature, 1.8v to 5.5v operating voltage , nipdau, tape & reel). (4) for soic, eiaj (x) package the standard finish is matte-tin. this package is available in 2000 pcs/reel, i.e. cat25c256xi-t2 . (5) for additional package and temperature options, please contact your nearest catalyst semiconductor sales office.
cat25c128/256 12 document no. 1018, rev. i catalyst semiconductor, inc. corporate headquarters 2975 stender way santa clara, ca 95054 phone: 408.542.1000 fax: 408.542.1200 www.catsemi.com publication #: 1018 revison: i issue date: 10/13/06 type: final copyrights, trademarks and patents trademarks and registered trademarks of catalyst semiconductor include each of the following: dpp dpps ae 2 catalyst semiconductor has been issued u.s. and foreign patents and has patent applications pending that protect its products. for a complete list of patents issued to catalyst semiconductor contact the companys corporate office at 408.542.1000. catalyst semiconductor makes no warranty, representation or guarantee, express or implied, regarding the suitability of its products for any particular purpose, nor that the use of its products will not infringe its intellectual property rights or the rights of third parties with respect to any particular use or application and specifically disclaims any and all liability aris ing out of any such use or application, including but not limited to, consequential or incidental damages. catalyst semiconductor products are not designed, intended, or authorized for use as components in systems intended for surgica l implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the catalyst semic onductor product could create a situation where personal injury or death may occur. catalyst semiconductor reserves the right to make changes to or discontinue any product or service described herein without not ice. products with data sheets labeled "advance information" or "preliminary" and other products described herein may not be in production or offered for sale . catalyst semiconductor advises customers to obtain the current version of the relevant product information before placing order s. circuit diagrams illustrate typical semiconductor applications and may not be complete. revision history date rev. reason 8/5/2004 f updated features updated dc operating characteristics table & notes 2/172005 g updated d.c. operating characteristics table 05/23/2005 h updated reliability characteristics table 10/13/06 i update features update description update pin configuration update pin funtions update d.c. operating characteristics (v cc range) update a.c. characteristics tables (v cc range) update ordering information

▲Up To Search▲

Price & Availability of CAT25C128XA-18-GT3

	To Download CAT25C128XA-18-GT3 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .