27C256R Datasheet | Atmel

Features - - - - - - - - - Fast Read Access Time - 45 ns Low Power CMOS Operation 100 µA max. Standby 20 m A max. Active at 5 MHz JEDEC Standard Packages 28-Lead 600-mil PDIP 32-Lead PLCC 28-Lead TSOP and SOIC 5V ± 10% Supply High Reliability CMOS Technology 2,000V ESD Protection 200 m A Latchup Immunity Rapid™ Programming Algorithm - 100 µs/byte (typical) CMOS and TTL patible Inputs and Outputs Integrated Product Identification Code mercial and Industrial Temperature Ranges 256K (32K x 8) OTP CMOS EPROM Description The AT27C256R is a low-power, high performance 262,144 bit one-time programmable read only memory (OTP EPROM) organized 32K by 8 bits. It requires only one 5V power supply in normal read mode operation. Any byte can be accessed in less than 45 ns, 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 only 8 m A in Active Mode and less than 10 µA in Standby. (continued) Pin Configurations Pin Name A0 - A14 O0 - O7 CE OE NC Function Addresses Outputs Chip Enable Output Enable No Connect PDIP, SOIC Top View AT27C256R PLCC Top View TSOP Top View Type 1 Note: PLCC Package Pins 1 and 17 are DON’T CONNECT. 0014G 3-125 Description (Continued) The AT27C256R is available in a choice of industry standard JEDEC-approved one time programmable (OTP) plastic DIP, PLCC, SOIC, and TSOP 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 to be accessed by the system without the delays of mass storage media. Atmel’s 27C256R 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. Programming time is typically only...