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SMJ44C251B-10HJM Datasheet(PDF) 1 Page - Austin Semiconductor |
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SMJ44C251B-10HJM Datasheet(HTML) 1 Page - Austin Semiconductor |
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1 / 57 page  VRAM VRAM VRAM VRAM VRAM SMJ44C251B MT42C4256 Austin Semiconductor, Inc. SMJ44C251B/MT42C4256 Rev. 0.1 12/03 Austin Semiconductor, Inc. reserves the right to change products or specifications without notice. 1 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-Transfer Function Between the DRAM and the Serial-Data Register • 4 × 4 Block-Write Feature for Fast Area Fill Operations; As Many as Four Memory Address Locations Written per Cycle From an On-Chip Color Register • Write-Per-Bit Feature for Selective Write to Each RAM I/O; Two Write-Per-Bit Modes to Simplify System Design • Enhanced Page-Mode Operation for Faster Access • CAS-Before-RAS (CBR) and Hidden Refresh Modes • All Inputs/Outputs and Clocks Are TTL Compatible • Long Refresh Period: Every 8 ms (Max) • Up to 33-MHz Uninterrupted Serial-Data Streams • 3-State Serial I/Os Allow Easy Multiplexing of Video-Data Streams • 512 Selectable Serial-Register Starting • Split Serial-Data Register for Simplified Real-Time Register Reload OPTIONS MARKING • Timing 100ns, 30ns/27ns -10 120ns, 35ns/35ns -12 • Package(s) MT Prefix SMJ Prefix Ceramic SOJ DCJ --- Ceramic DIP (400 mil) C JDM Ceramic LCC EC HMM Ceramic Flat Pack F --- Ceramic ZIP CZ SVM Ceramic LCC --- HJM PIN ASSIGNMENT (Top View) AVAILABLE AS MILITARY SPECIFICATIONS • SMD 5962-89497 • MIL-STD-883 28-Pin DIP (C) (400 MIL) 256K X 4 VRAM 256K x 4 DRAM with 512K x 4 SAM For more products and information please visit our web site at www.austinsemiconductor.com 28-Pin SOJ (DCJ) 28-Pin LCC (EC) 28-Pin ZIP (CZ) DSF DQ3 SDQ2 Vss SDQ0 TRG\ DQ1 GND A8 A5 Vcc A3 A1 QSF DQ2 SE\ SDQ3 SC SDQ1 DQ0 W\ RAS\ A8 A4 A7 A2 A0 CAS\ 1 3 5 7 9 11 13 15 17 19 21 23 25 27 2 4 6 8 10 12 14 16 18 20 22 24 26 28 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 SC SDQ1 SDQ2 TR\/OE\ DQ1 DQ2 ME\/WE\ NC RAS\ A8 A6 A5 A4 Vcc Vss SDQ4 SDQ3 SE\ DQ4 DQ3 DSF CAS\ QSF A0 A1 A2 A3 A7 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 SC SDQ1 SDQ2 TR\/OE\ DQ1 DQ2 ME\/WE\ NC RAS\ A8 A6 A5 A4 Vcc Vss SDQ4 SDQ3 SE\ DQ4 DQ3 DSF CAS\ QSF A0 A1 A2 A3 A7 28-Pin FP (F) 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 SC SDQ1 SDQ2 TR\/OE\ DQ1 DQ2 ME\/WE\ NC RAS\ A8 A6 A5 A4 Vcc Vss SDQ4 SDQ3 SE\ DQ4 DQ3 DSF CAS\ QSF A0 A1 A2 A3 A7 PIN NAME (SMJ) PIN NAME (MT) DESCRIPTION A0 - A8 A0 - A8 Address Inputs CAS\ CAS\ Column Enable DQ0 - DQ3 DQ1 - DQ4 DRAM Data In-Out/Write-Mask Bit SE\ SE\ Serial Enable RAS\ RAS\ Row Enable SC SC Serial Data Clock SDQ0 - SDQ3 SDQ1 - SDQ4 Serial Data In-Out TRG\ TR\ /OE\ Transfer Register/Q Output Enable W\ ME\ /WE\ Write-Mask Select/Write Enable DSF DSF Special Function Select QSF QSF Split-Register Activity Status Vcc Vcc 5V Supply Vss Vss Ground GND NC Ground (Important: Not Connected to internal Vss, Pin should be left open or tied to ground. |
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