at27bv256 ATMEL Corporation, at27bv256 Datasheet - Page 2

• Manufacturer Part Number: at27bv256
• Description: At27bv256 256k 32k X 8 Unregulated Battery-voltage High-speed Otp Eprom
• Manufacturer: ATMEL Corporation

2. Pin Configurations
2.1
2.2
Note:
2
28-lead SOIC Top View
32-lead PLCC Top View
PLCC package pins 1 and 17 are Don’t Connect.
AT27BV256
NC
O0
A6
A5
A4
A3
A2
A1
A0
GND
VPP
A12
O0
O1
O2
A7
A6
A5
A4
A3
A2
A1
A0
5
6
7
8
9
10
11
12
13
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Atmel’s AT27BV256 has additional features to ensure high quality and efficient production
use. The Rapid Programming Algorithm reduces the time required to program the part and
guarantees reliable programming. Programming time is typically only 100 µs/byte. The Inte-
grated Product Identification Code electronically identifies the device and manufacturer. This
feature is used by industry-standard programming equipment to select the proper program-
ming algorithms and voltages. The AT27BV256 programs exactly the same way as a standard
5V AT27C256R and uses the same programming equipment.
Pin Name
A0 - A14
O0 - O7
CE
OE
NC
28
27
26
25
24
23
22
21
20
19
18
17
16
15
29
28
27
26
25
24
23
22
21
VCC
A14
A13
A8
A9
A11
OE
A10
CE
O7
O6
O5
O4
O3
A8
A9
A11
NC
OE
A10
CE
O7
O6
2.3
Function
Addresses
Outputs
Chip Enable
Output Enable
No Connect
28-lead TSOP (Type 1) Top View
VCC
VPP
A11
A13
A14
A12
OE
A9
A8
A7
A6
A5
A4
A3
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
0601E–EPROM–12/07
9
8
A10
CE
O7
O6
O5
O4
O3
GND
O2
O1
O0
A0
A1
A2