AT93C56B-XHM-B Microchip

AT93C56B and AT93C66B 3-wire Serial EEPROM 2K (256 x 8 or 128 x 16) and 4K (512 x 8 or 256 x 16) DATASHEET Features Low-voltage Operation V = 1.7V to 5.5V CC User-selectable Internal Organization 2K: 256 x 8 or 128 x 16 4K: 512 x 8 or 256 x 16 3-wire Serial Interface Sequential Read Operation 2MHz Clock Rate (5V) Self-timed Write Cycle (5ms Max) High Reliability Endurance: 1,000,000 Write Cycles Data Retention: 100 Years 8-lead JEDEC SOIC, 8-lead TSSOP, 8-pad UDFN, 8-pad XDFN, and 8-ball VFBGA packages Description The Atmel AT93C56B/66B provides 2,048/4,096 bits of Serial Electrically Erasable Programmable Read-Only Memory (EEPROM) organized as 128/256 words of 16 bits each (when the ORG pin is connected to V ) and 256/512 words CC of 8 bits each (when the ORG pin is tied to ground). The device is optimized for use in many industrial and commercial applications where low-power and low- voltage operations are essential. The AT93C56B/66B is available in space-saving 8-lead JEDEC SOIC, 8-lead TSSOP, 8-pad UDFN, 8-pad XDFN, and 8-ball VFBGA packages. The AT93C56B/66B is enabled through the Chip Select pin (CS) and accessed via a 3-wire serial interface consisting of Data Input (DI), Data Output (DO), and Shift Clock (SK). Upon receiving a Read instruction at DI, the address is decoded, and the data is clocked out serially on the DO pin. The write cycle is completely self-timed, and no separate erase cycle is required before Write. The write cycle is only enabled when the part is in the Erase/Write Enable state. When CS is brought high following the initiation of a write cycle, the DO pin outputs the Ready/Busy status of the part. The AT93C56B/66B operates from 1.7V to 5.5V. Atmel-8735C-SEEPROM-AT93C56B-66B-Datasheet 0120151. Pin Configurations and Pinouts Table 1-1. Pin Configurations 8-lead SOIC 8-lead TSSOP Pin Name Function 1 8 CS V CC CS Chip Select CS 1 8 V CC SK 2 7 NC 2 7 SK NC SK Serial Data Clock DI 3 6 ORG 3 6 DI ORG DO 4 5 GND DI Serial Data Input 4 5 DO GND Top View DO Serial Data Output Top View GND Ground V Power Supply CC 8-pad UDFN/XDFN 8-ball VFBGA ORG Internal Organization 8 1 V CS 8 1 CC V CS CC 7 2 NC No Connect NC SK 7 2 NC SK 6 3 ORG DI ORG 6 3 DI 5 4 GND DO GND 5 4 DO Bottom View Bottom View Note: Drawings are not to scale. 2. Absolute Maximum Ratings* *Notice: Stresses beyond those listed under Absolute Operating Temperature 55 C to +125 C Maximum Ratings may cause permanent damage Storage Temperature 65 C to +150 C to the device. This is a stress rating only, and functional operation of the device at these or any Voltage on any pin other conditions beyond those indicated in the with respect to ground 1.0V to +7.0V operational sections of this specification is not implied. Exposure to absolute maximum rating Maximum Operating Voltage . 6.25V conditions for extended periods may affect device reliability. DC Output Current .5.0mA 2 AT93C56B/66B DATASHEET Atmel-8735C-SEEPROM-AT93C56B-66B-Datasheet 012015