29C040 查看數據表（PDF） - Atmel Corporation
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29C040 Datasheet PDF : 11 Pages
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AT29C040A
Features
Fast Read Access Time - 120 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 120 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
Pin Configurations
Pin Name Function
A0 - A18 Addresses
CE
Chip Enable
OE
Output Enable
WE
Write Enable
I/O0 - I/O7 Data Inputs/Outputs
NC
No Connect
AT29C040A
DIP Top View
TSOP Top View
Type 1
0333D
4-165
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