Features
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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
2-Megabit
(256K x 8)
5-volt Only
CMOS Flash
Memory
AT29C020
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)
DIP Top View
AT29C020
Pin Configurations
Pin Name
A0 - A17
CE
OE
WE
Function
Addresses
Chip Enable
Output Enable
Write Enable
I/O0 - I/O7 Data Inputs/Outputs
NC
No Connect
PLCC Top View
TSOP Top View
Type 1
0291I/G20-I–6/97
ATMEL [ ATMEL CORPORATION ]
