AT29C020 Datasheet | Atmel

Features - - - - - - - - - - - - - Fast Read Access Time - 90 ns 5-Volt-Only Reprogramming Sector Program Operation Single Cycle Reprogram (Erase and Program) 1024 Sectors (256 bytes/sector) Internal Address and Data Latches for 256-Bytes Internal Program Control and Timer Hardware and Software Data Protection Two 8 KB Boot Blocks with Lockout Fast Sector Program Cycle Time - 10 ms DATA Polling for End of Program Detection Low Power Dissipation 40 m A Active Current 100 µA CMOS Standby Current Typical Endurance > 10,000 Cycles Single 5V ±10% Supply CMOS and TTL patible Inputs and Outputs mercial and Industrial Temperature Ranges 2-Megabit (256K x 8) 5-volt Only CMOS Flash Memory AT29C020 Description The AT29C020 is a 5-volt-only in-system Flash programmable and erasable read only memory (PEROM). Its 2 megabits of memory is organized as 262,144 bytes. Manufactured with Atmel’s advanced nonvolatile CMOS technology, the device offers access times to 90 ns with power dissipation of just 220 m W over the mercial temperature range. When the device is deselected, the CMOS standby current is less than 100 µA. Device endurance is such that any sector can typically be written to in excess of 10,000 times. (continued) DIP Top View Pin Configurations Pin Name A0 - A17 CE OE WE Function Addresses Chip Enable Output Enable Write Enable I/O0 - I/O7 Data Inputs/Outputs NC No Connect PLCC Top View TSOP Top View Type 1 0291I/G20-I- 6/97 Description (Continued) To allow for simple in-system reprogrammability, the AT29C020 does not require high input voltages for programming. Five-volt-only mands determine the operation of the device. Reading data out of the device is similar to reading from an EPROM. Reprogramming the AT29C020 is performed on a sector basis; 256-bytes of data are loaded into the device and then simultaneously programmed. During a reprogram cycle, the address locations and 256bytes of data are internally latched, freeing the address and...