Product Overview
Harris CD74HCT03E Quad 2-Input Open-Drain NAND Gate Logic IC DIP-14
Condition
Used pull. Hand-pulled from decommissioned equipment with clean physical pedigree. Evaluation: Visual inspection only. Function testing not performed. Markings legible: Harris logo, CD74HCT03E, MALAY, H9801BPJD.
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Product Overview
Harris CD74HCT03E provides four independent 2-input NAND gates with open-drain outputs in a standard 14-pin DIP footprint. Built on high-speed silicon-gate CMOS technology, it delivers TTL-voltage input compatibility for seamless interfacing between legacy bipolar logic and modern CMOS systems.
Key Features
- Four independent 2-input NAND gates in a single DIP-14 package
- Open-drain outputs capable of external pull-up voltages up to 10 V
- High-speed CMOS performance with TTL-compatible input logic thresholds
- Operating supply voltage range from 4.5 V to 5.5 V VCC
- Fanout capability driving up to 10 LSTTL loads
- Standard 14-lead through-hole PDIP construction
Applications
- Wired-AND logic decoding and signal gating in industrial control systems
- Interfacing legacy TTL logic levels to higher-voltage pull-up busses
- Driving LED indicators or relay transistor stages on custom hobbyist boards
- Bench breadboarding, logic experimentation, and vintage computer repair
Frequently Asked Questions
Do the open-drain outputs require pull-up resistors?
Yes. The open-drain outputs must be connected to an external pull-up resistor to establish a logic-high voltage level, allowing wired-AND configurations or level shifting up to 10 V.
Is the CD74HCT03E pin-compatible with standard 7403 logic ICs?
Yes. The pinout matches standard 7403, 74LS03, and 74HC03 quad 2-input open-drain NAND gate integrated circuits in DIP-14 packages.
What should I expect when purchasing this pulled IC?
This chip was hand-pulled from decommissioned equipment and selected for intact leads and legible top markings. Visual inspection was performed without functional electrical testing, backed by our satisfaction guarantee.
Open-drain gates are the quiet workhorses of bus arbitration and level shifting. Plug this DIP-14 into your breadboard or repair socket and let the pull-up resistor do the talking.
