Product Overview
National Semiconductor DM8500N Dual J-K Flip-Flop TTL Logic IC
Condition
Used pull from equipment. Hand-pulled from decommissioned gear and selected for clean physical condition. Evaluation: Visual inspection only. Function testing not performed. Markings legible: DM8500N NS / SN7476N 08. Gold-plated leads are straight and intact.
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Product Overview
National Semiconductor DM8500N dual J-K flip-flop integrated circuit in a 16-pin dual in-line package (DIP-16). Cross-referenced directly to the industry-standard SN7476N logic architecture, featuring individual J, K, clock, preset, and clear inputs with complementary outputs. Built on standard 5V TTL logic with distinctive gold-plated leads for vintage computing restoration, breadboard development, or legacy equipment repair.
Key Features
- Dual J-K flip-flops with independent preset and clear inputs
- Cross-compatible logic equivalent to standard SN7476N
- 16-pin dual in-line package (DIP-16, 300-mil body)
- Gold-plated through-hole leads
- Standard 5.0V nominal TTL supply voltage
Applications
- Restoring vintage digital control boards and 1970s mainframe or minicomputer logic
- Benchtop breadboarding for digital electronics training and discrete logic projects
- Direct drop-in replacement for failed 7476 series flip-flops in legacy industrial controllers
Frequently Asked Questions
What logic function does the DM8500N perform?
It contains two independent J-K flip-flops with individual clock, preset, and clear controls, functionally and pin-compatible with the SN7476N.
What supply voltage is required for operation?
This is standard TTL logic operating at a nominal 5.0V DC supply.
What condition are the leads and package in as an equipment pull?
The package body is intact with clear top-side markings, and the gold-plated pins are straight and clean. Visual inspection only; function testing not performed.
Gold-pinned TTL from the days when building a register meant seating a real dual flip-flop into a socket. Plug it in and put that vintage timing circuit back into lockstep.
