Product Overview
Motorola MC1814P 14-Pin MDTL Bipolar Quad Latch IC for HP 1820-0665 Replacement
Condition
Unused new old stock (NOS). Gold-plated leads are straight and clean. Markings legible: MC1814P with Motorola logo. Sold each.
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Product Overview
Motorola MC1814P is a monolithic bipolar quad D-type latch integrated circuit from the MDTL (Motorola Diode-Transistor Logic) family. Housed in a 14-pin dual in-line package (DIP-14, Case 646), it provides four independent latch stages for temporary data storage and digital interfacing in vintage 5V logic systems. Designed for industrial and computing equipment of the late 1960s and 1970s, this component serves as a direct factory cross-reference for Hewlett-Packard part number 1820-0665.
Key Features
- Logic family: Motorola Diode-Transistor Logic (MDTL), MC1800/MC1900 series
- Logic function: Quad D-type latch
- Circuit architecture: Bipolar DTL
- Nominal supply voltage: 5.0 V
- Typical propagation delay: 35 ns
- Typical power dissipation: 220 mW per package
- Package type: 14-pin dual in-line plastic package (DIP-14, Case 646)
- Lead finish: Gold-plated pins
- Operating temperature range: 0°C to +75°C
- Original equipment cross-reference: Hewlett-Packard 1820-0665
Applications
- Restoring vintage computing, test, and measurement equipment using MDTL logic families.
- Replacing defective HP 1820-0665 quad latch ICs in legacy Hewlett-Packard test gear.
- Maintaining legacy industrial control boards and process automation circuits.
- Prototyping authentic retro-computing hardware and period-accurate digital logic experiments.
Frequently Asked Questions
What logic family does the MC1814P belong to?
The MC1814P is part of the Motorola Diode-Transistor Logic (MDTL) family, designed for 5V bipolar digital systems.
Is the MC1814P compatible with HP part number 1820-0665?
Yes. HP component documentation confirms HP 1820-0665 directly cross-references the Motorola MC1814P.
How many latches are contained in one MC1814P package?
Each package contains four independent D-type latch circuits sharing common power and ground, latching four data bits per IC.
Gold-pinned MDTL logic comes from the era that helped build modern solid-state computing. When an older piece of bench iron loses a latch, this drops right into the socket and puts the machine back to work.
