Features
• Fast Read Access Time - 120 ns
• Word-wide or Byte-wide Configurable
• Dual Voltage Range Operation
– Unregulated Battery Power Supply Range, 2.7V to 3.6V
or Standard 5V ± 10% Supply Range
• 4-Megabit Flash and Mask ROM Compatable
• Low Power CMOS Operation
– 20 µA Maximum Standby
– 10 mA Max. Active at 5 MHz for VCC = 3.6V
• JEDEC Standard Packages
4-Megabit
(256K x 16 or
512K x 8)
– 44-Lead PLCC
– 44-Lead SOIC (SOP)
– 48-Lead TSOP (12 mm x 20 mm)
• High Reliability CMOS Technology
– 2,000 ESD Protection
– 200 mA Latchup Immunity
• Rapid™ Programming Algorithm - 50 µs/word (typical)
• CMOS and TTL Compatible Inputs and Outputs
– JEDEC Standard for LVTTL and LVBO
• Integrated Product Identification Code
• Commercial and Industrial Temperature Ranges
Unregulated
Battery-Voltage™
High Speed
OTP EPROM
Description
The AT27BV400 is a high performance low-power, low-voltage 4,194,304-bit one time
programmable read only memory (OTP EPROM) organized as either 256K by 16 or
512K by 8 bits. It requires only one supply in the range of 2.7 to 3.6V in normal read
AT27BV400
Preliminary
(continued)
PLCC
Pin Configurations
Pin Name
A0 - A17
O0 - O15
O15/A-1
Function
A4
A3
A2
7
8
9
39 A12
38 A13
37 A14
36 A15
35 A16
34 BYTE/VPP
33 GND
32 O15/A-1
31 07
Addresses
Outputs
A1 10
A0 11
CE 12
GND 13
OE 14
O0 15
O8 16
O1 17
Output/Address
Byte Mode/
Program Supply
BYTE/VPP
30 O14
29 O6
CE
OE
NC
Chip Enable
Output Enable
No Connect
AT27BV400
Preliminary
TSOP
Type 1
SOIC (SOP)
A15
A14
A13
A12
A11
A10
A9
1
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
A16
2
BYTE/VPP
GND
015/A-1
O7
3
NC
NC
A17
A7
1
2
3
4
5
6
7
8
9
44 NC
4
43 NC
5
42 A8
6
O14
O6
41 A9
7
A6
40 A10
39 A11
38 A12
37 A13
36 A14
35 A15
34 A16
33 BYTE/VPP
32 GND
31 015/A-1
30 O7
A8
8
O13
O5
A5
NC
NC
NC
NC
NC
NC
NC
NC
A17
A7
9
A4
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
O12
O4
A3
A2
VCC
O11
O3
A1 10
A0 11
CE 12
GND 13
OE 14
O0 15
O8 16
O1 17
O9 18
O2 19
O10 20
O3 21
O11 22
O10
O2
O9
O1
A6
O8
29 O14
28 O6
A5
O0
A4
OE
27 O13
26 O5
Rev. 0989A–03/98
A3
GND
CE
A2
25 O12
24 O4
A1
A0
23 VCC
1