AT27C020 Datasheet, PDF (1/9 Pages) ATMEL Corporation – 2-Megabit 256K x 8 OTP EPROM

AT27C020
Features
• Fast Read Access Time - 55 ns
• Low Power CMOS Operation
– 100 µA max. Standby
– 25 mA max. Active at 5 MHz
• JEDEC Standard Packages
– 32-Lead 600-mil PDIP
– 32-Lead PLCC
– 32-Lead TSOP
• 5V ± 10% Supply
• 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
• Integrated Product Identification Code
• Commercial and Industrial Temperature Ranges
Description
The AT27C020 is a low-power, high performance 2,097,152-bit one-time programma-
ble read only memory (OTP EPROM) organized as 256K by 8 bits. It requires only
one 5V power supply in normal read mode operation. Any byte can be accessed in
less than 55 ns, eliminating the need for speed reducing WAIT states on high perfor-
mance microprocessor systems.
In read mode, the AT27C020 typically consumes 8 mA. Standby mode supply current
is typically less than 10 µA.
Pin Configurations
PLCC Top View
Pin Name
A0 - A17
O0 - O7
CE
OE
PGM
Function
Addresses
Outputs
Chip Enable
Output Enable
Program Strobe
A7 5
A6 6
A5 7
A4 8
A3 9
A2 10
A1 11
A0 12
O0 13
29 A14
28 A13
27 A8
26 A9
25 A11
24 OE
23 A10
22 CE
21 07
2-Megabit
(256K x 8)
OTP EPROM
AT27C020
PDIP Top View
VPP 1
A16 2
A15 3
A12 4
A7 5
A6 6
A5 7
A4 8
A3 9
A2 10
A1 11
A0 12
O0 13
O1 14
O2 15
GND 16
32 VCC
31 PGM
30 A17
29 A14
28 A13
27 A8
26 A9
25 A11
24 OE
23 A10
22 CE
21 07
20 06
19 05
18 04
17 03
TSOP Top View
Type 1
A11 1
A9 2
A8 3
A13 4
A14 5
A17 6
PGM 7
VCC 8
VPP 9
A16 10
A15 11
A12 12
A7 13
A6 14
A5 15
A4 16
32 OE
31 A10
30 CE
29 07
28 06
27 05
26 04
25 03
24 GND
23 02
22 01
21 O0
20 A0
19 A1
18 A2
17 A3
Rev. 0570C-B–12/97
1