AT27C040 is a low-power, high-performance, OTP EPROM, organized as 512K*8 bits. This chip requires only one 5V power supply in normal read mode operation. Any byte can be accessed in less than 70ns, eliminating the need for speed reducing WAIT states on high-performance microprocessor systems. Atmel's scaled CMOS technology provides low active power consumption and fast programming. Power consumption is typically 8mA in active mode and less than 10µA in standby mode. AT27C040 is available in a choice of industry-standard JEDEC-approved one-time programmable (OTP) plastic PDIP, PLCC and TSOP packages. The device features two-line control (CE, OE) to eliminate bus contention in high-speed systems. Atmel's AT27C040 has additional features to ensure high quality and efficient production use. The Rapid Programming Algorithm reduces the time required to program the part and guarantees reliable programming. Typical programming time is 100µs/byte.
The AT27C040 OTP EPROM from Atmel provides 4,194,304 bits of non‑volatile storage in 32‑lead PDIP, PLCC or TSOP packages. It operates from a single 5 V supply, offers 70 ns read access time, and features a rapid programming algorithm of 100 ps per byte.
The device includes built‑in product identification, 2000 V ESD protection, and operates over an industrial temperature range of –40 °C to +85 °C. Detailed electrical characteristics, pin configurations, and programming requirements are provided for designers.
| Read Access Time | 70 ns |
|---|---|
| Standby Current | 100 pA max |
| Active Current (5 MHz) | 30 mA max |
| Supply Voltage | 5 V ±10 % |
| ESD Protection | 2000 V |
| Latchup Immunity | 200 mA |
| Programming Speed | 100 ps/Byte (typical) |
| Operating Temperature (Case) | -40 °C to +85 °C |
The device provides a fast read access time of less than 70 ns.
It operates from a single 5 V supply with a tolerance of ±10 %.
The chip stores 4,194,304 bits, organized as 512 K × 8 bits.