MT42C4256 Overview
VRAM SMJ44C251B MT42C4256 256K X 4 VRAM 256K x 4 DRAM with 512K x 4 SAM AVAILABLE AS MILITARY SPECIFICATIONS SMD 5962-89497.
MT42C4256 Key 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
- 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 patible
