MT42C4256 Datasheet (Austin Semiconductor) - 256K X 4 VRAM 256K x 4 DRAM

MT42C4256, 256K X 4 VRAM 256K x 4 DRAM

Address Inputs Column Enable DRAM Data In-Out/Write-Mask Bit Serial Enable Row Enable Serial Data Clock Serial Data In-Out Transfer Register/Q Output Enable Write-Mask Select/Write Enable Special Function Select Split-Register Activity Status 5V Supply Ground Ground (Important: Not Connected to inte

Austin Semiconductor, Inc.

256K X 4 VRAM 256K x 4 DRAM with 512K x 4 SAM AVAILABLE AS MILITARY SPECIFICATIONS SMD 5962-89497 MIL-STD-883 SMJ44C251B MT42C4256 PIN ASSIGNMENT (Top View) VRAM 28-Pin DIP (C) (400 MIL) SC SDQ1 SDQ2 TR/OE DQ1 DQ2 ME/WE NC RAS A8 A6 A5 A4 Vcc 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 Vss SDQ4 SDQ3 SE DQ4 DQ3 DSF CAS QSF A0 A1 A2 A3 A7 28-Pin SOJ (DCJ) 28-Pin LCC (EC) SC SDQ1 SDQ2 TR/OE DQ1 DQ2 ME/WE NC RAS A8 A6

MT42C4256 Features

* Class B High-Reliability Processing

* DRAM: 262144 Words × 4 Bits SAM: 512 Words × 4 Bits

* Single 5-V Power Supply (±10% Tolerance)

* Dual Port Accessibility

* Simultaneous and Asynchronous Access From the DRAM and SAM Ports

* Bidirectional-Data-Trans