Features
• Fast Read Access Time - 45 ns
• Low-Power CMOS Operation
– 100 µA max. Standby
– 20 mA max. Active at 5 MHz
• JEDEC Standard Packages
– 28-Lead 600-mil PDIP
– 32-Lead PLCC
– 28-Lead TSOP and SOIC
• 5V ± 10% Supply
• High-Reliability CMOS Technology
– 2,000V ESD Protection
512K (64K x 8)
OTP EPROM
– 200 mA Latchup Immunity
• Rapid™ Programming Algorithm - 100 µs/byte (typical)
• CMOS and TTL Compatible Inputs and Outputs
• Integrated Product Identification Code
• Commercial, Industrial and Automotive Temperature Ranges
AT27C512R
Description
The AT27C512R is a low-power, high-performance 524,288-bit one-time programma-
ble read only memory (OTP EPROM) organized 64K by 8 bits. It requires only one 5V
power supply in normal read mode operation. Any byte can be accessed in less than
45 ns, eliminating the need for speed reducing WAIT states on high-performance
microprocessor systems.
Atmel’s scaled CMOS technology provides high-speed, lower active power consump-
tion, and significantly faster programming. Power consumption is typically only 8 mA
in Active Mode and less than 10 µA in Standby.
(continued)
PDIP, SOIC Top View
Pin Configurations
A15
A12
A7
1
2
3
4
5
6
7
8
9
28 VCC
27 A14
26 A13
25 A8
Pin Name
A0 to A15
O0 - O7
CE
Function
Addresses
A6
A5
24 A9
Outputs
A4
23 A11
22 OE/VPP
21 A10
20 CE
19 O7
18 O6
17 O5
16 O4
15 O3
A3
Chip Enable
Output Enable/VPP
No Connect
A2
A1
OE/VPP
NC
A0 10
O0 11
O1 12
O2 13
GND 14
512K EPROM
PLCC Top View
TSOP Top View
Type 1
A6
A5
A4
A3
A2
5
6
7
8
9
29 A8
28 A9
OE/VPP
A11
A9
22
23
24
25
26
27
28
1
21
20
19
18
17
16
15
14
13
12
11
10
9
A10
CE
O7
O6
O5
O4
O3
GND
O2
O1
O0
A0
27 A11
26 NC
25 OE/VPP
24 A10
23 CE
22 O7
21 O6
A8
A1 10
A0 11
NC 12
O0 13
A13
A14
VCC
A15
A12
A7
2
3
A6
4
A5
5
A4
6
A1
Rev. 0015I–07/98
A3
7
8
A2
Note:
PLCC Package Pins 1 and
17 are DON’T CONNECT.
1