Product Overview
National Semiconductor DM8001N Open-Collector TTL Logic IC
Condition
Used equipment pull. Evaluation: Visual inspection only. Function testing not performed. Markings legible: DM8001N NS / SN7401N 6944. Package features gold-plated leads with light insertion wear.
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Product Overview
National Semiconductor DM8001N is a vintage standard TTL integrated circuit containing four independent 2-input NAND gates with open-collector outputs. Manufactured as National's equivalent to the industry-standard SN7401N, its open-collector design supports wire-AND logic and direct driving of lamps, relays, or alternate logic levels when paired with an external pull-up resistor. Housed in a 14-pin dual in-line package with gold-plated lead tabs and stamped with a 1969 date code, this device suits legacy computer repairs and period digital restorations.
Key Features
- Logic function: Quad 2-input NAND gates
- Output configuration: Open-collector outputs for wire-AND configurations
- Logic family: Standard TTL (Transistor-Transistor Logic)
- Supply voltage: 5.0 V typical operating voltage
- Cross-reference: Marked with SN7401N industry-standard designation
- Package: 14-pin dual in-line package (DIP-14) with through-hole gold leads
Applications
- Restoring vintage minicomputers, digital test instruments, and early arcade logic boards.
- Driving status lamps, relays, or level-shifted buses using an external pull-up resistor.
- Prototyping retro computing hardware requiring authentic late-1960s TTL components.
Frequently Asked Questions
Is the DM8001N compatible with standard 7401 and SN7401N logic chips?
Yes. The DM8001N is National Semiconductor's early series designation for the standard 7401 open-collector quad NAND gate, sharing the standard 14-pin DIP pinout and electrical characteristics.
Does this IC require external pull-up resistors to function?
Yes. Because the gate outputs are open-collector rather than standard totem-pole stages, an external pull-up resistor connected to the desired supply rail is required to pull the output high.
What is the condition of this pulled IC, and has it been electrically tested?
This chip is a vintage equipment pull inspected visually with intact pins and clear markings. Electrical function testing has not been performed, and the listing photograph shows the specific unit offered.
Gold-pinned TTL from the dawn of digital computing, built when logic chips were still an event. If your vintage board needs an authentic late-sixties fix, here is the exact piece to finish it.
