Rainbow Electronics AT27LV520 - Manual

1
512K (64K x 8)
Multiplexed
Addresses/
Outputs
Low-voltage
OTP EPROM
AT27LV520
Features
• 8-bit Multiplexed Addresses/Outputs
• Fast Read Access Time – 70 ns
• Dual Voltage Range Operation
– Low-voltage Power Supply Range, 3.0V to 3.6V, or
– Standard 5V
± 10% Supply Range
• Pin Compatible with Standard AT27C520
• Low-power CMOS Operation
– 20 µA max. Standby for ALE = V
IH
and V
CC
= 3.6V
– 29 mW max. Active at 5 MHz for V
CC
= 3.6V
• JEDEC Standard Packages
– 20-lead TSSOP
– 20-lead SOIC
• High-reliability CMOS Technology
– 2,000V ESD Protection
– 200 mA Latch-up Immunity
• Rapid ™ Programming Algorithm – 50 µs/Byte (Typical)
• CMOS- and TTL-compatible Inputs and Outputs
– JEDEC Standard for LVTTL
• Integrated Product Identification Code
• Commercial and Industrial Temperature Range
Description
The AT27LV520 is a low-power, high-performance, 524,288-bit one-time programma-
ble read-only memory (OTP EPROM) organized 64K by eight bits. It incorporates
latches for the eight lower order address bits to multiplex with the eight data bits. This
minimizes system chip count, reduces cost, and simplifies the design of multiplexed
bus systems. It requires only one power supply in the range of 3.0V to 3.6V for normal
read mode operation, making it ideal for fast, portable systems using battery power.
Any byte can be accessed in less than 70 ns.
The AT27LV520 is available in 173 mil, 20-lead TSSOP and 300 mil, 20-lead SOIC,
one-time programmable (OTP) plastic packages.
Rev. 0911D–05/00
Pin Configurations
Pin Name Function
A8 - A15 Addresses
AD0 - AD7 Addresses/Outputs
OE /VPP Output Enable/Program Supply
ALE Address Latch Enable
TSSOP Top View
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
A10
A12
A14
ALE
VCC
OE/VPP
A15
A13
A11
A9
A8
AD1
AD3
AD5
AD7
GND
AD6
AD4
AD2
AD0
(continued)
SOIC Top View
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
OE/VPP
A15
A13
A11
A9
AD0
AD2
AD4
AD6
GND
VCC
ALE
A14
A12
A10
A8
AD1
AD3
AD5
AD7