Product Overview
National Semiconductor 14473557 Triple 3-Input High-Speed TTL AND Gate
Condition
Used. Evaluation: Visual inspection only. Function testing not performed. Markings legible on top of plastic body: National Semiconductor logo, date code 917, and part number 14473557. Stored as a single 14-pin DIP through-hole component.
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Product Overview
The 14473557 is an OEM house-numbered high-speed TTL triple 3-input positive-AND gate manufactured by National Semiconductor, corresponding to the industry-standard 74H11 (DM74H11N) logic function. Produced under Burroughs Corporation OEM part number 1447-3557 and cross-referenced under NSN 5962-01-141-6930, this integrated circuit comes in a standard 14-pin plastic dual in-line package (DIP-14) suitable for vintage mainframe maintenance, breadboard development, and legacy logic circuit repair.
Key Features
- Logic function: Triple 3-input positive-AND gate (74H11)
- Logic family: High-speed TTL (74H series)
- Supply voltage: 5.0 V DC nominal
- Package: 14-pin dual in-line package (DIP-14)
- Mounting: Through-hole
- Body markings: National Semiconductor logo, date code 917 (week 17, 1979), and OEM part number 14473557
- Cross references: 1447-3557, DM74H11N, SN74H11N, NSN 5962-01-141-6930
Applications
- Restoring Burroughs mainframe logic sections and vintage computing backplanes calling for part 1447-3557
- Direct drop-in replacement for standard 74H11, DM74H11N, or SN74H11N circuits requiring fast gate propagation
- Bench testing, retrocomputing projects, and discrete TTL logic breadboarding
Frequently Asked Questions
Does this chip use standard 74H11 pinout and logic?
Yes. The Burroughs OEM part number 14473557 maps directly to the standard 74H11 triple 3-input AND gate logic function in a 14-pin DIP package operating on a standard 5V rail.
What date code is marked on this specific integrated circuit?
The markings on the IC body read 917, designating manufacture in the 17th week of 1979 by National Semiconductor.
Why buy this specific pull instead of gambling on an untested bulk lot?
You receive the exact, individually photographed National Semiconductor IC shown on this page, complete with clear OEM markings and straight package pins ready for a socket or PCB, eliminating the uncertainty of mixed untested grab bags. Orders ship for an $8 flat rate, ship free once your order reaches $28, and dispatch from our Idaho warehouse the same or next business day.
Vintage high-speed TTL carries a distinct presence on a circuit board, built back when mainframe logic had real weight and measurable bite. Put the exact replacement back into the socket and watch the old machine clock forward.
