Features
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Fast Read Access Time - 100 ns
5-Volt-Only Reprogramming
Sector Program Operation
Single Cycle Reprogram (Erase and Program)
2048 Sectors (256 bytes/sector)
Internal Address and Data Latches for 256-Bytes
Internal Program Control and Timer
Hardware and Software Data Protection
Two 16 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
Description
The AT29C040A is a 5-volt-only in-system Flash Programmable and Erasable Read
Only Memory (PEROM). Its 4 megabits of memory is organized as 524,288 words by
8 bits. Manufactured with Atmel’s advanced nonvolatile CMOS EEPROM technology,
the device offers access times up to 100 ns, and a low 220 mW power dissipation.
When the device is deselected, the CMOS standby current is less than 100
µA.
The
device endurance is such that any sector can typically be written to in excess of
10,000 times. The programming algorithm is compatible with other devices in Atmel’s
5-volt-only Flash family.
(continued)
4-Megabit
(512K x 8)
5-volt Only
256-Byte Sector
CMOS Flash
Memory
AT29C040A
AT29C040A
Pin Configurations
Pin Name
A0 - A18
CE
OE
WE
Function
Addresses
Chip Enable
Output Enable
Write Enable
I/O0 - I/O7 Data Inputs/Outputs
NC
No Connect
DIP Top View
TSOP Top View
Type 1
0333E–9/97
ATMEL [ ATMEL CORPORATION ]
