Rainbow Electronics AT27BV256 - Manual

1
Features
• Fast Read Access Time - 70 ns
• Dual Voltage Range Operation
– Unregulated Battery Power Supply Range, 2.7V to 3.6V
or Standard 5V
±
10% Supply Range
• Pin Compatible with JEDEC Standard AT27C256R
• Low Power CMOS Operation
– 20 µA max. (less than 1 µA typical) Standby for V
CC
= 3.6V
– 29 mW max. Active at 5 MHz for V
CC
= 3.6V
• JEDEC Standard Surface Mount Packages
– 32-Lead PLCC
– 28-Lead 330-mil SOIC
– 28-Lead TSOP
• High Reliability CMOS Technology
– 2,000V ESD Protection
– 200 mA Latchup Immunity
• Rapid™ Programming Algorithm - 100 µs/byte (typical)
• CMOS and TTL Compatible Inputs and Outputs
– JEDEC Standard for LVTTL and LVBO
• Integrated Product Identification Code
• Commercial and Industrial Temperature Ranges
Description
The AT27BV256 is a high performance, low power, low voltage 262,144-bit one-time
programmable read only memory (OTP EPROM) organized as 32K by 8 bits. It
requires only one supply in the range of 2.7V to 3.6V in normal read mode operation,
making it ideal for fast, portable systems using either regulated or unregulated battery
power.
256K (32K x 8)
Unregulated
Battery-Voltage
™
High Speed
OTP EPROM
AT27BV256
Rev. 0601B–10/98
Pin Configurations
Pin Name Function
A0 - A14 Addresses
O0 - O7 Outputs
CE Chip Enable
OE Output Enable
NC No Connect
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
VPP
A12
A7
A6
A5
A4
A3
A10
CE
O7
O6
O5
O4
O3
GND
O2
O1
O0
A0
A1
A2
PLCC Top View
Note: PLCC package pins 1 and 17 are
DON’T CONNECT.
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
O0
A8
A9
A11
NC
OE
A10
CE
O7
O6
4 3 2 1
32 31 30
14 15 16 17 18 19 20
O1 O2
GND
NC O3 O4 O5
A7 A12 VPP NC VCC A14 A13
SOIC Top View
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
VPP
A12
A7
A6
A5
A4
A3
A2
A1
A0
O0
O1
O2
GND
VCC
A14
A13
A8
A9
A11
OE
A10
CE
O7
O6
O5
O4
O3
(continued)