EEPROM, serial, 2Kb (128x16 / 256x8), 2.7-5V, SO-8

Three-wire Serial EEPROM

Description:
The AT93C56A/66A provides 2048/4096 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 VCC) and 256/512 words 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 AT93C56A/66A is available in space-saving 8-lead PDIP, 8-lead JEDEC SOIC, 8- lead EIAJ SOIC, 8-lead Ultra Thin mini-MAP (MLP 2x3), 8-lead TSSOP, and 8-ball dBGA2 packages. The AT93C56A/66A is enabled through the Chip Select pin (CS) and accessed via a three-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 data output pin DO. 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 AT93C56A/66A is available in 2.7V to 5.5V and 1.8V to 5.5V versions.

Features:
- Low-voltage and Standard-voltage Operation
- 2.7 (VCC = 2.7V to 5.5V)
- 1.8 (VCC = 1.8V to 5.5V)
- User-selectable Internal Organization
- 2K: 256 x 8 or 128 x 16
- 4K: 512 x 8 or 256 x 16
- Three-wire Serial Interface
- Sequential Read Operation
- 2 MHz Clock Rate (5V)
- Self-timed Write Cycle (10 ms Max)
- High Reliability
- Endurance: 1 Million Write Cycles
- Data Retention: 100 Years
- Automotive Devices Available
- 8-lead JEDEC PDIP, 8-lead JEDEC SOIC, 8-lead EIAJ SOIC, 8-lead Ultra Thin mini-MAP
(MLP 2x3), 8-lead TSSOP and 8-ball dBGA2 Packages