2-Megabit
(256K x 8)
5-volt Only
CMOS Flash
Memory
AT29C020
Features
•
Fast Read Access Time - 90 ns
•
5-Volt-Only Reprogramming
•
Sector Program Operation
Single Cycle Reprogram (Erase and Program)
1024 Sectors (256 bytes/sector)
Internal Address and Data Latches for 256-Bytes
•
Internal Program Control and Timer
•
Hardware and Software Data Protection
•
Two 8 KB Boot Blocks with Lockout
•
Fast Sector Program Cycle Time - 10 ms
•
DATA Polling for End of Program Detection
•
Low Power Dissipation
40 mA Active Current
100 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
Description
The AT29C020 is a 5-volt-only in-system Flash programmable and erasable read only
memory (PEROM). Its 2 megabits of memory is organized as 262,144 bytes. Manu-
factured with Atmel’s advanced nonvolatile CMOS technology, the device offers ac-
cess times to 90 ns with power dissipation of just 220 mW over the commercial tem-
perature range. When the device is deselected, the CMOS standby current is less
than 100 µA. Device endurance is such that any sector can typically be written to in
excess of 10,000 times.
(continued)
AT29C020
DIP Top View
TSOP Top View
Type 1
Pin Configurations
Pin Name Function
A0 - A17 Addresses
CE Chip Enable
OE Output Enable
WE Write Enable
I/O0 - I/O7 Data Inputs/Outputs
NC No Connect
PLCC Top View
0291I/G20-I–6/97