AT27C256R-70PU IC EPROM 256KBIT PARALLEL

Features

•Fast read access time – 45ns

•Low-power CMOS operation– 100μA max standby– 20mA max active at 5MHz

•JEDEC standard packages– 28-lead PDIP– 32-lead PLCC

•5V±10% supply

•High reliability CMOS technology– 2,000V ESD protection– 200mA latchup immunity

•Rapid programming algorithm – 100μs/byte (typical)

•CMOS- and TTL-compatible inputs and outputs

•Integrated product identification code

•Industrial and automotive temperature ranges•

The Atmel®AT27C256R is a low-power, high-performance, 262,144-bit, one-time pro-grammable, read-only memory (OTP EPROM) organized as 32K by 8 bits.

It requires only one 5V power supply in normal read mode operation. Any byte can be accessed in less than
45ns, eliminating the need for speed reducing WAIT states on high-performance micropro-cessor systems.

The Atmel scaled CMOS technology provides low active power consumption and fast pro-gramming. Power consumption is typically only 8mA in active mode and less than 10μA in
standby mode.

The AT27C256R is available in a choice of industry-standard, JEDEC-approved, one-time programmable (OTP) PDIP and PLCC packages. All devices feature two-line control (CE,OE) to give designers the flexibility to prevent bus contention.

With 32K byte storage capability, the AT27C256R allows firmware to be stored reliably and