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MMI 6309-N1 Integrated Circuit 20Pin
Description:
The MMI 6309-N1 is a vintage 256 × 8-bit fuse-programmable PROM (Programmable Read-Only Memory) developed by Monolithic Memories Inc. (MMI). It’s part of the same family as the MMI 6309-1J and 6309-1N, and was widely used in early microprocessor systems for storing firmware, lookup tables, or bootloaders—especially in systems like the Apple II Disk II controller.
Specifications:
- Function: PROM (One-Time Programmable Memory)
- Organization: 256 words × 8 bits (2 kilobits total)
- Programming Type: Fuse-link (OTP)
- Access Time: ~50–70 ns
- Output Type: 3-state TTL-compatible
- Supply Voltage: 5 V
- Package: 20-pin DIP (Dual In-line Package)
- Mounting Type: Through-hole
| SKU | INC-0392-C09 |
|---|
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