The MT42C4256 by Austin Semiconductor is a 256K X 4 VRAM 256K x 4 DRAM. Below is the official datasheet preview.
| Part number | MT42C4256 |
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| Manufacturer | Austin Semiconductor |
| File Size | 1.30 MB |
| Description | 256K X 4 VRAM 256K x 4 DRAM |
| Datasheet |
 MT42C4256_AustinSemiconductor.pdf
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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 internal Vss, Pin should be left open or tied to ground.
📁 MT42C4256 Similar Datasheet
