256K 32K x 8 5-volt Only CMOS Flash Memory
AT29C256
Features
• • • • • • • • • • • •
Fast Read Access Time - 70 ns 5-Volt-Only Reprogramming Page Program Operati...
Description
AT29C256
Features
Fast Read Access Time - 70 ns 5-Volt-Only Reprogramming Page Program Operation Single Cycle Reprogram (Erase and Program) Internal Address and Data Latches for 64-Bytes Internal Program Control and Timer Hardware and Software Data Protection Fast Program Cycle Times Page (64-Byte) Program Time - 10 ms Chip Erase Time - 10 ms DATA Polling for End of Program Detection Low Power Dissipation 50 mA Active Current 300 µA CMOS Standby Current Typical Endurance > 10,000 Cycles Single 5V ± 10% Supply CMOS and TTL Compatible Inputs and Outputs Commercial and Industrial Temperature Ranges
256K (32K x 8) 5-volt Only CMOS Flash Memory
Description
The AT29C256 is a 5-volt-only in-system Flash programmable and erasable read only memory (PEROM). Its 256K of memory is organized as 32,768 words by 8 bits. Manufactured with Atmel’s advanced nonvolatile CMOS technology, the device offers access times to 70 ns with power dissipation of just 275 mW. When the device is deselected, the CMOS standby current is less than 300 µA. The device endurance is such that any sector can typically be written to in excess of 10,000 times. (continued)
Pin Configurations
Pin Name A0 - A14 CE OE WE I/O0 - I/O7 NC DC Function Addresses Chip Enable Output Enable Write Enable Data Inputs/Outputs No Connect Don’t Connect
DIP Top View
AT29C256
PLCC Top View
TSOP Top View
Type 1
Note: PLCC package pins 1 and 17 are DON’T CONNECT.
0046L
4-93
Description (Continued)
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