Rainbow Electronics AT29LV256 - Manual

1
Features
• Single Supply Voltage, Range 3V to 3.6V
• 3-Volt Only Read and Write Operation
• Software Protected Programming
• Low Power Dissipation
– 15 mA Active Current
– 40 µA CMOS Standby Current
• Fast Read Access Time - 150 ns
• Sector Program Operation
– Single Cycle Reprogram (Erase and Program)
– 512 Sectors (64 bytes/sector)
– Internal Address and Data Latches for 64 Bytes
• Fast Sector Program Cycle Time - 20 ms Max.
• Internal Program Control and Timer
• DATA Polling for End of Program Detection
• Typical Endurance > 10,000 Cycles
• CMOS and TTL Compatible Inputs and Outputs
• Commercial and Industrial Temperature Ranges
Description
The AT29LV256 is a 3-volt-only in-system Flash Programmable Erasable Read Only
Memory (PEROM). Its 256K of memory is organized as 32,768 words by 8 bits. Man-
ufactured with Atmel’s advanced nonvolatile CMOS technology, the device offers
access times to 150 ns with power dissipation of just 54 mW over the commercial tem-
perature range. When the device is deselected, the CMOS standby current is less
than 40
µ
A. The device endurance is such that any sector can typically be written to in
excess of 10,000 times.
256K (32K x 8)
3-volt Only
Flash Memory
AT29LV256
Rev. 0563B–10/98
Pin Configurations
Pin Name Function
A0 - A14 Addresses
CE Chip Enable
OE Output Enable
WE Write Enable
I/O0 - I /O7 Data Inputs/Outputs
NC No Connect
DC Don’t Connect
PLCC Top View
5
6
7
8
9
10
11
12
13
29
28
27
26
25
24
23
22
21
A6
A5
A4
A3
A2
A1
A0
NC
I/O0
A8
A9
A11
NC
OE
A10
CE
I/O7
I/O6
4 3 2 1
32 31 30
14 15 16 17 18 19 20
I/O1 I/O2 GND
DC
I/O3 I/O4 I/O5
A7 A12 WE DC VCC A14 A13
(continued)
TSOP Top View
Type 1
22
23
24
25
26
27
28
1
2
3
4
5
6
7
21
20
19
18
17
16
15
14
13
12
11
10
9
8
OE
A11
A9
A8
A13
A14
VCC
WE
A12
A7
A6
A5
A4
A3
A10
CE
I/O7
I/O6
I/O5
I/O4
I/O3
GND
I/O2
I/O1
I/O0
A0
A1
A2