Features
• Fast Read Access Time – 55 ns
• Low Power CMOS Operation
•
•
•
•
•
•
•
•
•
– 100 µA Maximum Standby
– 40 mA Maximum Active at 5 MHz
JEDEC Standard Packages
– 40-lead PDIP
– 44-lead PLCC
– 40-lead VSOP
Direct Upgrade from 512-Kbit, 1-Mbit, and 2-Mbit
(AT27C516, AT27C1024, and AT27C2048) EPROMs
5V ± 10% Power Supply
High Reliability CMOS Technology
– 2,000V ESD Protection
– 200 mA Latchup Immunity
Rapid Programming Algorithm – 50 µs/Word (Typical)
CMOS and TTL Compatible Inputs and Outputs
Integrated Product Identification Code
Industrial Temperature Range
Green (Pb/Halide-free) Packaging Option
4-Megabit
(256K x 16)
OTP EPROM
AT27C4096
1. Description
The AT27C4096 is a low-power, high-performance 4,194,304-bit one-time programmable read-only memory (OTP EPROM) organized 256K by 16 bits. It requires a
single 5V power supply in normal read mode operation. Any word can be accessed in
less than 55 ns, eliminating the need for speed-reducing WAIT states. The x16 organization makes this part ideal for high-performance 16- and 32-bit microprocessor
systems.
In read mode, the AT27C4096 typically consumes 15 mA. Standby mode supply current is typically less than 10 µA.
The AT27C4096 is available in industry-standard JEDEC-approved one-time programmable (OTP) plastic PDIP, PLCC, and VSOP packages. The device features
two-line control (CE, OE) to eliminate bus contention in high-speed systems.
With high density 256K word storage capability, the AT27C4096 allows firmware to be
stored reliably and to be accessed by the system without the delays of mass storage
media.
Atmel’s AT27C4096 has additional features that ensure high quality and efficient production use. The Rapid Programming Algorithm reduces the time required to program
the part and guarantees reliable programming. Programming time is typically only
50 µs/word. 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.
0311I–EPROM–12/07
