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8720c?seepr?7/12 features ? low-voltage and standard-voltage operation ? 1.7v (v cc = 1.7v to 3.6v) ? 2.5v (v cc = 2.5v to 5.5v) ? internally organized as 65,536 x 8 ? 2-wire serial interface ? schmitt triggers, filtered inputs for noise suppression ? bidirectional data transfer protocol ? 400khz (1.7v) and 1mhz (2.5v, 5.5v) compatibility ? write protect pin for hardware data protection ? 128-byte page write mode ? partial page writes allowed ? random and sequential read modes ? self-timed write cycle (5ms max) ? high reliability ? endurance: 1,000,000 write cycles ? data retention: 40 years ? green package options (pb/halide-free/rohs compliant) ? 8-lead jedec soic, 8-lead eiaj soic, 8-lead tssop, 8-pad udfn, and 8-ball vfbga packages ? die sale options: wafer form and tape and reel available description the atmel ? at24c512c provides 524,288 bits of serial electrically erasable and programmable read-only memory (eeprom) organized as 65,536 words of eight bits each. the cascadable feature of the device allows up to eight devices to share a common 2-wire bus. the device is optimized for use in many industrial and commercial applications where low-power and low-voltage operation are essential. the devices are available in space-saving 8-lead jedec soic, 8-lead eiaj soic, 8-lead tssop, 8-pad udfn, and 8-ball vfbga packages. in addition, the entire family is available in 1.7v (1.7v to 3.6v) and 2.5v (2.5v to 5.5v) versions. atmel at24c512c i 2 c-compatiable (2-wire) serial eeprom 512-kbit (65,536 x 8) datasheet
2 atmel at24c512c [datasheet] 8720c?seepr?7/12 1. pin configurations and pinouts figure 1. pin configurations 2. absolute maximum ratings* pin name function a 0 - a 2 address inputs gnd ground sda serial data scl serial clock input wp write protect v cc power supply 1 2 3 4 8 7 6 5 a 0 a 1 a 2 gnd v cc wp scl sda 8-lead soic 1 2 3 4 8 7 6 5 v cc wp scl sda a 0 a 1 a 2 gnd 8-pad udfn bottom view v cc wp scl sda a 0 a 1 a 2 gnd 1 2 3 4 8 7 6 5 8-ball vfbga bottom view 1 2 3 4 8 7 6 5 a 0 a 1 a 2 gnd v cc wp scl sd a 8-lead tssop operating temperature . . . . . . . . . . .?55c to +125c storage temperature . . . . . . . . . . . .?65c to +150c voltage on any pin with respect to ground . . . . . . . . . . . . . ?1.0v to +7.0v maximum operating voltage . . . . . . . . . . . . . . . 6.25v dc output current. . . . . . . . . . . . . . . . . . . . . . . 5.0ma *notice: stresses beyond 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 these or any other conditions beyond those indicated in the operational sections of this specification is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability.
3 atmel at24c512c [datasheet] 8720c?seepr?7/12 3. block diagram 4. pin descriptions serial clock (scl) ? the scl input is used to positive-edge clock data into each eeprom device and negative-edge clock data out of each device. serial data (sda) ? the sda pin is bidirectional for serial data transfer. this pin is open-drain driven, and may be wire-ored with any number of other open-drain or open-collector devices. device addresses (a 2 , a 1 , a 0 ) ? the a 2 , a 1 , and a 0 pins are device address inputs that are hardwired or left not connected for compatibility with other atmel at24cxx devices. when the pins are hardwired, as many as eight 512k devices may be addressed on a single bus system (see section 7. ?device addressing? on page 9 for more details). if these pins are left floating, the a 2 , a 1 , and a 0 pins will be internally pulled down to gnd. however, due to capacitive coupling that may appear during customer applications, atmel recommends always connecting the address pins to a known state. when using a pull-up resistor, atmel recommends using 10k ? or less. write protect (wp) ? the write protect input, when connected to gnd, allows normal write operations. when wp pin is connected directly to v cc , all write operations to the memory are inhibited. if the pin is left floating, the wp pin will be internally pulled down to gnd; however, due to capacitive coupling that may appear during customer applications, atmel recommends always connecting the wp pin to a known state. when using a pull-up resistor, atmel recommends using 10k ? or less. table 4-1. write protect start stop logic v cc gnd wp scl sda a 2 a 1 a 0 serial control logic en h.v. pump/timing eeprom data recovery serial mux x dec d out /ack logic comp load inc data word addr/counter y dec r/w d out d in load device address comparator wp pin status part of the array protected atmel at24c512c at v cc full array at gnd normal read/write operations
4 atmel at24c512c [datasheet] 8720c?seepr?7/12 5. memory organization atmel at24c512c, 512-kbit serial eeprom : the 512k is internally organized as 512 pages of 128 bytes each. random word addressing requires a 16-bit data word address. table 5-1. pin capacitance (1) note: 1. this parameter is characterized and is not 100% tested. table 5-2. dc characteristics note: 1. v il min and v ih max are reference only, and are not tested. applicable over recommended operating range from t a = 25 ? c, f = 1.0mhz, v cc = 1.7v to 3.6v or 2.5v to 5.5v symbol test condition max units conditions c i/o input/output capacitance (sda) 8 pf v i/o = 0v c in input capacitance (a 0 , a 1 , a 2 , scl) 6 pf v in = 0v applicable over recommended operating range from: t ai = ?40 ? c to +85 ? c, v cc = 1.7v to 3.6v or 2.5v to 5.5v (unless otherwise noted) symbol parameter test condition min typ max units v cc1 supply voltage 1.7 3.6 v v cc2 supply voltage 2.5 5.5 v i cc1 supply current v cc = 5.0v read at 400khz 2.0 ma i cc2 supply current v cc = 5.0v write at 400khz 3.0 ma i sb1 standby current v cc = 1.7v v in = v cc or v ss 1.0 a v cc = 3.6v 3.0 a i sb2 standby current v cc = 2.5v v in = v cc or v ss 2.0 a v cc = 5.5v 6.0 a i li input leakage current v in = v cc or v ss 0.10 3.0 a i lo output leakage current v out = v cc or v ss 0.05 3.0 a v il input low level (1) ?0.6 v cc x 0.3 v v ih input high level (1) v cc x 0.7 v cc + 0.5 v v ol1 output low level v cc = 1.7v i ol = 0.15ma 0.2 v v ol2 output low level v cc = 3.0v i ol = 2.1ma 0.4 v
5 atmel at24c512c [datasheet] 8720c?seepr?7/12 table 5-3. ac characteristics notes: 1. this parameter is ensured by characterization only. 2. ac measurement conditions: ? r l (connects to v cc ): 1.3k ? (2.5v, 5v), 10k ? (1.7v) ? input pulse voltages: 0.3v cc to 0.7v cc ? input rise and fall times: ? 50ns ? input and output timing reference voltages: 0.5v cc applicable over recommended operating range from t ai = -40 ? c to +85 ? c, v cc = 1.7v to 3.6v or 2.5v to 5.5v (where applicable), cl = 100pf (unless otherwise noted). test conditions are listed in note 2 . symbol parameter 1.7v 2.5v, 5.0v units min max min max f scl clock frequency, scl 400 1000 khz t low clock pulse width low 1.3 0.4 s t high clock pulse width high 0.6 0.4 s t i noise suppression time (1) 100 50 ns t aa clock low to data out valid 0.05 0.9 0.05 0.55 s t buf time the bus must be free before a new transmission can start (1) 1.3 0.5 s t hd.sta start hold time 0.6 0.25 s t su.sta start set-up time 0.6 0.25 s t hd.dat data in hold time 0 0 s t su.dat data in set-up time 100 100 ns t r inputs rise time (1) 0.3 0.3 s t f inputs fall time (1) 300 100 ns t su.sto stop set-up time 0.6 0.25 s t dh data out hold time 50 50 ns t wr write cycle time 5 5 ms endurance (1) 25c, page mode, 3.3v 1,000,000 write cycles
6 atmel at24c512c [datasheet] 8720c?seepr?7/12 6. device operation clock and data transitions: the sda pin is normally pulled high with an external device. data on the sda pin may change only during scl low time periods (see figure 6-4 on page 8 ). data changes during scl high periods will indicate a start or stop condition as defined below. start condition: a high-to-low transition of sda with scl high is a start condition, which must precede any other command (see figure 6-5 on page 8 ). stop condition: a low-to-high transition of sda with scl high is a stop condition. after a read sequence, the stop command will place the eeprom in a standby power mode (see figure 6-5 on page 8 ). acknowledge: all addresses and data words are serially transmitted to and from the eeprom in 8-bit words. the eeprom sends a zero during the ninth clock cycle to acknowledge that it has received each word. standby mode: the at24c512c features a low-power standby mode, which is enabled: ? upon power-up and ? after the receipt of the stop bit and the completion of any internal operations. software reset: after an interruption in protocol, power loss, or system reset, any 2-wire part can be protocol reset by following these steps: 1. create a start condition 2. clock nine cycles 3. create another start condition followed by a stop condition, as shown in figure 6-1 below. the device is ready for the next communication after the above steps have been completed . figure 6-1. software reset scl 9 start bit start bit stop bit 8 3 2 1 sda dummy clock cycles
7 atmel at24c512c [datasheet] 8720c?seepr?7/12 figure 6-2. bus timing scl: serial clock, sda: serial data i/o figure 6-3. write cycle timing scl: serial clock, sda: serial data i/o notes: 1. the write cycle time, t wr , is the time from a valid stop condition of a write sequence to the end of the internal clear/write cycle. scl sda in sda out t f t high t low t low t r t aa t dh t buf t su.sto t su.dat t hd.dat t hd.sta t su.sta t wr (1) stop condition start condition word n ack 8 th bit scl sda
8 atmel at24c512c [datasheet] 8720c?seepr?7/12 figure 6-4. data validity figure 6-5. start and stop definition figure 6-6. output acknowledge sda scl data stable data stable data change sda scl start stop scl data in data out start acknowledge 9 8 1
9 atmel at24c512c [datasheet] 8720c?seepr?7/12 7. device addressing the 512k eeprom requires an 8-bit device address word following a start condition to enable the chip for a read or write operation. the device address word consists of a mandatory ?1010? sequence for the first four most-significant bits (see figure 7-1 below). this is common to all 2-wire eeprom devices. the 512k uses the three device address bits, a2, a1, and a0, to allow as many as eight devices on the same bus. these bits must compare to their corresponding hardwired input pins. the a 2 , a 1 , and a 0 pins use an internal proprietary circuit that biases them to a logic low condition if the pins are allowed to float. the eighth bit of the device address is the read/write operation select bit. a read operation is initiated if this bit is high, and a write operation is initiated if this bit is low. upon a compare of the device address, the eeprom will output a zero. if a valid compare is not made, the device will return to a standby state. figure 7-1. device address 8. write operations byte write: a byte write operation requires two 8-bit data word addresses following the device address word and acknowledgment. upon receipt of this address, the eeprom will again respond with a zero, and then the part is to receive an 8-bit data word. following receipt of the 8-bit data word, the eeprom will output a zero. the addressing device, such as a microcontroller, then must terminate the write sequence with a stop condition. at this time, the eeprom enters an internally-timed write cycle, t wr , to the nonvolatile memory. all inputs are disabled during this write cycle, and the eeprom will not respond until the write is complete (see figure 9-1 on page 10 ). page write: the 512-kbit eeprom is capable of 128-byte page writes. a page write is initiated the same way as a byte write, but the microcontroller does not send a stop condition after the first data word is clocked in. instead, after the eeprom acknowledges receipt of the first data word, the microcontroller can transmit up to 127 more data words. the eeprom will respond with a zero after each data word received. the microcontroller must terminate the page write sequence with a stop condition (see figure 9-2 on page 10 ) and the internally timed write cycle will begin. the lower seven bits of the data word address are internally incremented following the receipt of each data word. the higher data word address bits are not incremented, retaining the memory page row location. when the word address, internally generated, reaches the page boundary, the following byte is placed at the beginning of the same page. if more than 128 data words are transmitted to the eeprom, the data word address will roll-over, and the previous data will be overwritten. the address roll over during write is from the last byte of the current page to the first byte of the same page. acknowledge polling: once the internally-timed write cycle has started and the eeprom inputs are disabled, acknowledge polling can be initiated. this involves sending a start condition followed by the device address word. the read/write select bit is representative of the operation desired. only if the internal write cycle has completed will the eeprom respond with a zero, allowing the read or write sequence to continue. data security: at24c512c has a hardware data protection scheme that allows the user to write protect the entire memory when the wp pin is at v cc . msb lsb 1 0 1 0 a2 a1 a0 r/w
10 atmel at24c512c [datasheet] 8720c?seepr?7/12 9. read operations read operations are initiated the same way as write operations with the exception that the read/write select bit in the device address word is set to one. there are three types of read operations: current address read, random address read, and sequential read. current address read: the internal data word address counter maintains the last address accessed during the last read or write operation, incremented by one. this address stays valid between operations as long as the chip power is maintained. the address roll over during read is from the last byte of the last memory page to the first byte of the first page. once the device address with the read/write select bit set to one is clocked in and acknowledged by the eeprom, the current address data word is serially clocked out on the sda line. the microcontroller does not respond with an zero, but does generate a following stop condition (see figure 9-3 on page 11 ). random read: a random read requires an initial byte write sequence to load in the data word address. this is known as a ?dummy write? operation. once the device address word and data word address are clocked in and acknowledged by the eeprom, the microcontroller must generate another start condition. the microcontroller now initiates a current address read by sending a device address with the read/write select bit high. the eeprom acknowledges the device address and serially clocks out the data word. the microcontroller does not respond with a zero, but does generate a following stop condition (see figure 9-4 on page 11 ). sequential read: sequential reads are initiated by either a current address read or a random address read. after the microcontroller receives a data word, it responds with an acknowledge. as long as the eeprom receives an acknowledge, it will continue to increment the data word address and serially clock out sequential data words. when the memory address limit is reached, the data word address will roll-over and the sequential read will continue. the sequential read operation is terminated when the microcontroller does not respond with a zero but does generate a following stop condition (see figure 9-5 on page 11 ). figure 9-1. byte write figure 9-2. page write s t a r t w r i t e s t o p device address first word address second word address data sda line m s b a c k r / w a c k a c k a c k sda line s t a r t w r i t e device address first word address (n) second word address (n) data (n) data (n + x) m s b a c k r / w a c k a c k a c k a c k s t o p
11 atmel at24c512c [datasheet] 8720c?seepr?7/12 figure 9-3. current address read figure 9-4. random read figure 9-5. sequential read data device address s t a r t r e a d s t o p a c k m s b r / w n o a c k sda line sda line s t a r t s t a r t r e a d w r i t e s t o p device address second word address device address first word address data (n) m s b a c k a c k a c k l s b a c k n o a c k r / w dummy write r / w sda line s t a r t s t a r t r e a d w r i t e s t o p device address second word address device address first word address data (n + 1) data (n + 2) data (n + x) data (n) m s b a c k a c k a c k l s b a c k a c k a c k a c k n o a c k r / w dummy write . . . . . . r / w
12 atmel at24c512c [datasheet] 8720c?seepr?7/12 10. ordering code detail atmel designator product family device density device revision shipping carrier option operating voltage package device grade or wafer/die thickness 512 = 512k b or blank = bulk (tubes) t = tape and reel m = 1.7v to 3.6v d = 2.5v to 5.5v h = green, nipdau lead finish, industrial temperature range (-40c to +85c) u = green, matte sn lead finish, industrial temperature range (-40c to +85c) 11 = 11mil wafer thickness package option ss = jedec soic s = eiaj soic x = tssop ma = udfn c = vfbga wwu = wafer unsawn at24c512c-sshm-b
13 atmel at24c512c [datasheet] 8720c?seepr?7/12 11. part markings drawing no. rev. title catalog number truncation at24c512c truncation code: 2fc aaaaaaaa 2fc% @ atmlhyww 8-lead soic 8-lead tssop aaaaaaa 2fc% @ athyww 8-lead udfn 2fc h%@ yxx 2.0 x 3.0 mm body 8-lead eiaj aaaaaaaa 2fc% @ atmlhyww 1.5 x 2.0 mm body 8-ball vfbga pin 1 2fcu ymxx note 2: package drawings are not to scale note 1: designates pin 1 package mark contact: dl-cso-assy_eng@atmel.com 24c512csm d 7/11/12 24c512csm, at24c512c package marking information date codes voltages y = year m = month ww = work week of assembly % = minimum voltage 2: 2012 6: 2016 a: january 02: week 2 d: 2.5v min 3: 2013 7: 2017 b: february 04: week 4 m: 1.7v min 4: 2014 8: 2018 ... ... 5: 2015 9: 2019 l: december 52: week 52 country of assembly lot number grade/lead finish material @ = country of assembly aaa...a = atmel wafer lot number u: industrial/matte tin h: industrial/nipdau trace code atmel truncation xx = trace code (atmel lot numbers correspond to code) at: atmel example: aa, ab.... yz, zz atm: atmel atml: atmel at24c512c: package marking information
14 atmel at24c512c [datasheet] 8720c?seepr?7/12 12. ordering codes atmel at24c512c ordering information notes: 1. b = bulk 2. t = tape and reel ? soic = 4k per reel, ? tssop, udfn, and vfbga = 5k per reel 3. for wafer sales, please contact atmel sales. ordering code voltage package operation range at24c512c-sshm-b (1) (nipdau lead finish) 1.7v to 3.6v 8s1 lead-free/halogen-free/ industrial temperature ( ? 40 to 85 ? c) AT24C512C-SSHM-T (2) (nipdau lead finish) 1.7v to 3.6v 8s1 at24c512c-sshd-b (1) (nipdau lead finish) 2.5v to 5.5v 8s1 at24c512c-sshd-t (2) (nipdau lead finish) 2.5v to 5.5v 8s1 at24c512c-shm-b (1) (nipdau lead finish) 1.7v to 3.6v 8s2 at24c512c-shm-t (2) (nipdau lead finish) 1.7v to 3.6v 8s2 at24c512c-shd-b (1) (nipdau lead finish) 2.5v to 5.5v 8s2 at24c512c-shd-t (2) (nipdau lead finish) 2.5v to 5.5v 8s2 at24c512c-xhm-b (1) (nipdau lead finish) 1.7v to 3.6v 8x at24c512c-xhm-t (2) (nipdau lead finish) 1.7v to 3.6v 8x at24c512c-xhd-b (1) (nipdau lead finish) 2.5v to 5.5v 8x at24c512c-xhd-t (2) (nipdau lead finish) 2.5v to 5.5v 8x at24c512c-mahm-t (2) (nipdau lead finish) 1.7v to 3.6v 8ma2 at24c512c-cum-t (2) 1.7v to 3.6v 8u2-1 at24c512c-wwu11m (3) 1.7v to 3.6v die sale industrial temperature ( ? 40 to 85 ? c) package type 8s1 8-lead, 0.150? wide, plastic gull wing, small outline (jedec soic) 8s2 8-lead, 0.208? wide, plastic gull wing, small outline (eiaj soic) 8x 8-lead, 4.4mm body, plastic thin shrink small outline (tssop) 8ma2 8-pad, 2.00mm x 3.00mm body, 0.50mm pitch, ultra thin dual no lead (udfn) 8u2-1 8-ball, 2.35 x 3.73mm body, 0.75mm pitch, small die ball grid array (vfbga)
15 atmel at24c512c [datasheet] 8720c?seepr?7/12 13. package information 13.1 8s1 ? 8-lead jedec soic drawing no. rev. title gpc common dimensions (unit of measure = mm) symbol min nom max note a1 0.10 ? 0.25 a 1.35 ? 1.75 b 0.31 ? 0.51 c 0.17 ? 0.25 d 4.80 ? 5.05 e1 3.81 ? 3.99 e 5.79 ? 6.20 e 1.27 bsc l 0.40 ? 1.27 ? ? 0 ? 8 ? e 1 n top view c e1 end view a b l a1 e d side view package drawing contact: packagedrawings@atmel.com 8s1 g 6/22/11 notes: this drawing is for general information only. refer to jedec drawing ms-012, variation aa for proper dimensions, tolerances, datums, etc. 8s1, 8-lead (0.150? wide body), plastic gull wing small outline (jedec soic) swb
16 atmel at24c512c [datasheet] 8720c?seepr?7/12 13.2 8s2 ? 8-lead eiaj soic title drawing no. gpc rev. package drawing contact: packagedrawings@atmel.com 8s2 stn f 8s2, 8-lead, 0.208? body, plastic small outline package (eiaj) 4/15/08 common dimensions (unit of measure = mm) symbol min nom max note notes: 1. this drawing is for general information only; refer to eiaj drawing edr-7320 for additional information. 2. mismatch of the upper and lower dies and resin burrs aren't included. 3. determines the true geometric position. 4. values b,c apply to plated terminal. the standard thickness of the plating layer shall measure between 0.007 to .021 mm. a 1.70 2.16 a1 0.05 0.25 b 0.35 0.48 4 c 0.15 0.35 4 d 5.13 5.35 e1 5.18 5.40 2 e 7.70 8.26 l 0.51 0.85 q 0 8 e 1.27 bsc 3 q q 1 1 n n e e top view t o p v i e w c c e1 e 1 end view e n d v i e w a a b b l l a1 a 1 e e d d side view s i d e v i e w
17 atmel at24c512c [datasheet] 8720c?seepr?7/12 13.3 8x ? 8-lead tssop drawing no. rev. title gpc common dimensions (unit of measure = mm) symbol min nom max note a - - 1.20 a1 0.05 - 0.15 a2 0.80 1.00 1.05 d 2.90 3.00 3.10 2, 5 e 6.40 bsc e1 4.30 4.40 4.50 3, 5 b 0.19 ? 0.30 4 e 0.65 bsc l 0.45 0.60 0.75 l1 1.00 ref c 0.09 - 0.20 side view end view top view a2 a l l1 d 1 e1 n b pin 1 indicator this corner e e notes: 1. this drawing is for general information only. refer to jedec drawing mo-153, variation aa, for proper dimensions, tolerances, datums, etc. 2. dimension d does not include mold flash, protrusions or gate burrs. mold flash, protrusions and gate burrs shall not exceed 0.15mm (0.006in) per side. 3. dimension e1 does not include inter-lead flash or protrusions. inter-lead flash and protrusions shall not exceed 0.25mm (0.010in) per side. 4. dimension b does not include dambar protrusion. allowable dambar protrusion shall be 0.08mm total in excess of the b dimension at maximum material condition. dambar cannot be located on the lower radius of the foot. minimum space between protrusion and adjacent lead is 0.07mm. 5. dimension d and e1 to be determined at datum plane h. package drawing contact: packagedrawings@atmel.com 8x d 6/22/11 8x, 8-lead 4.4mm body, plastic thin shrink small outline package (tssop) tnr c a1
18 atmel at24c512c [datasheet] 8720c?seepr?7/12 13.4 8ma2 ? 8-pad udfn title drawing no. gpc rev. package drawing contact: packagedrawings@atmel.com 8ma2 ynz b 8ma2, 8-pad, 2 x 3 x 0.6 mm body, thermally enhanced plastic ultra thin dual flat no lead package (udfn) common dimensions (unit of measure = mm) symbol min nom max note d 2.00 bsc e 3.00 bsc d2 1.40 1.50 1.60 e2 1.20 1.30 1.40 a 0.50 0.55 0.60 a1 0.0 0.02 0.05 a2 ? ? 0.55 c 0.152 ref l 0.30 0.35 0.40 e 0.50 bsc b 0.18 0.25 0.30 3 k 0.20 ? ? 7/15/11 d2 e2 e e (6x) l (8x) b (8x) pin#1 id a a1 a2 pin 1 id d c k 8 7 6 5 1 2 3 4 1 2 3 4 8 7 6 5
19 atmel at24c512c [datasheet] 8720c?seepr?7/12 13.5 8u2-1 ? 8-ball vfbga drawing no. rev. title gpc package drawing contact: packagedrawings@atmel.com 8u2-1 f 3/20/12 8u2-1, 8-ball, 2.35 x 3.73 mm body, 0.75 mm pitch, vfbga package gww common dimensions (unit of measure = mm) symbol min nom max note a 0.81 0.91 1.00 a1 0.15 0.20 0.25 a2 0.40 0.45 0.50 b 0.25 0.30 0.35 d 2.35 bsc e 3.73 bsc e 0.75 bsc e1 0.74 ref d 0.75 bsc d1 0.80 ref 2. dimension 'b' is measured at the maximum solder ball diameter. 1. this drawing is for general 3. solder ball composition shall be 95.5sn-4.0ag-.5cu. notes: a d 0.08 c c f 0.10 c a1 a2 ?b j n 0.15 m cab j n 0.08 m c a (4x) d 0.10 b a1 ball pad corner d e side view top view e (e1) d 21 d c b a a1 ball pad corner (d1) 8 solder balls bottom view
20 atmel at24c512c [datasheet] 8720c?seepr?7/12 14. revision history doc. rev. date comments 8720c 07/2012 update part markings. update package drawings. update template. 8720b 12/2010 replace part markings with single page standard marking. remove five ordering code variations. 8720a 09/2010 initial document release.
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