AT27C020_07 Datasheet, PDF (1/14 Pages) ATMEL Corporation – 2-megabit (256K x 8) OTP EPROM

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 PDIP
– 32-lead PLCC
– 32-lead TSOP
• 5V ± 10% Supply
• High-reliability CMOS Technology
– 2,000V ESD Protection
– 200 mA Latch-up Immunity
• Rapid Programming Algorithm – 100 µs/Byte (Typical)
• CMOS- and TTL-compatible Inputs and Outputs
• Integrated Product Identification Code
• Industrial and Automotive Temperature Ranges
• Green (Pb/Halide-free) Packaging Option
2-megabit
(256K x 8)
OTP EPROM
AT27C020
1. Description
The AT27C020 is a low-power, high-performance, 2,097,152-bit, one-time program-
mable 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-
performance microprocessor systems.
In read mode, the AT27C020 typically consumes 8 mA. Standby mode supply current
is typically less than 10 µA.
The AT27C020 is available in a choice of industry-standard JEDEC-approved one-
time programmable (OTP) plastic PDIP, PLCC and TSOP packages. All devices fea-
ture two-line control (CE, OE) to give designers the flexibility to prevent bus
contention.
With 256K bytes storage capability, the AT27C020 allows firmware to be stored reli-
ably and to be accessed by the system without the delays of mass storage media.
Atmel’s AT27C020 has additional features to ensure high quality and efficient produc-
tion 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 Integrated Product Identification Code electronically identifies the
device and manufacturer. This feature is used by industry-standard programming
equipment to select the proper programming algorithms and voltages.
0570G–EPROM–12/07