AS27C256 Datasheet | Austin Semiconductor

UVEPROM Austin Semiconductor, Inc. 256K UVEPROM UV Erasable Programmable Read-Only Memory AVAILABLE AS MILITARY SPECIFICATIONS - -55C to 125C operation - MILITARY Processing Method MIL-PRF-38535, Class Q - mercial Version Available PIN ASSIGNMENT (Top View) 28-Pin DIP (J) (600 MIL) VPP A12 A7 A6 A5 A4 A3 A2 A1 A0 DQ0 DQ1 DQ2 GND 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 Vcc A14 A13 A8 A9 A11 G A10 E DQ7 DQ6 DQ5 DQ4 DQ3 Features - - - - - - - - Organized 32,768 x 8 Single +5V ±10% power supply Pin-patible with existing 256K ROM’s and EPROM’s All inputs/outputs fully TTL patible Power-saving CMOS technology Very high-speed FLASHRITE Pulse Programming 3-state output buffers 400-m V DC assured noise immunity with standard TTL loads - Latchup immunity of 250 m A on all input and output pins - Low power dissipation (CMOS Input Levels) -Active - 165m W Worst Case -Standby - 1.7m W Worst Case (CMOS-input levels) - FUTURE High Speed Offerings: 55ns, 70ns, 90ns 32-Pin LCC (ECA) (450 x 550 mils) A7 A12 A12 A14 6 A10 V PP NC NC VCC V CC A15 A14 CE2 A13 4 3 2 1 32 31 30 OPTIONS - Timing 120ns access 150ns access .. 170ns access 200ns access 250ns access 300ns access 55ns access 70ns access 90ns access MARKING -12 -15 -17 -20 -25 -30 -55 -70 -90 A6 5 A7 A5 6 A6 A4 7 A5 A3 8 A4 A2 9 A3 A2 A1 10 A1 A0 11 A0 NC 12 DQ1 DQ0 13 29 A8 WE 28 A9 A13 27 A11 A8 26 NC A9 25 G A11 24 A10 OE 23 E A10 22 DQ7 CE1 21 DQ6 DQ8 14 15 16 17 18 19...