Texas Instruments SN74HC32N-P2

Overview

SN74HC32N-P2 from Texas Instruments is a quadruple 2-input OR gate IC in PDIP-14 package, performing Y = A + B Boolean logic per channel with buffered CMOS inputs, 2 V to 6 V supply range, and –40°C to +85°C operating temperature. It delivers 4.3 V VOH at 4.5 V VCC driving 4 mA, supports up to 10 LSTTL loads, and is used in fan enable control and error-signal aggregation circuits.

For engineers reviewing the SN74HC32N-P2 datasheet, SN74HC32N-P2 pinout, SN74HC32N-P2 application, or SN74HC32N-P2 equivalent, this page provides verified functional identity, validated PDIP-14 pin mapping, confirmed switching performance (tpd ≤ 25 ns at 4.5 V), thermal limits (RθJA = 67.0°C/W), and two rigorously cross-checked alternative parts for logic-level OR gate replacement.

Technical Context

The SN74HC32N-P2 implements four independent positive-logic OR gates using balanced CMOS push-pull outputs capable of sourcing/sinking ±4 mA at 4.5 V while maintaining VOH ≥ 3.98 V and VOL ≤ 0.33 V. Its standard CMOS inputs exhibit ≤10 pF capacitance and ±1 µA leakage at 6 V.

It operates across 2–6 V supply with input thresholds defined as VIH ≥ 3.15 V and VIL ≤ 1.35 V at 4.5 V VCC, and features propagation delay tpd ≤ 25 ns (max) and transition time tt ≤ 19 ns (max) under 50 pF load at 25°C.

Key Specifications

Pinout & Package

SN74HC32N-P2 uses a 14-pin Plastic Dual In-line Package (PDIP) with 19.30 mm × 6.40 mm body size, through-hole mounting, and industry-standard 0.3-inch row spacing.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar OR gate applications.

Compared with SN74HC32N-P2, SN74HCT32N offers guaranteed TTL input compatibility at the cost of higher static current, while CD74HC32E provides extended temperature operation in a non-interchangeable ceramic package - neither is pin-compatible with PDIP-14 footprints outside their respective package families.

Availability

SN74HC32N-P2 is available at Aetrix Electronics and suitable for industrial control panels, embedded sensor hubs, and legacy 5 V digital logic systems requiring stable component supply and long-term obsolescence management.

Supply support for SN74HC32N-P2 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader delivering analog, embedded processing, and logic solutions with over 90 years of innovation in industrial, automotive, and consumer electronics.

The SN74HC32N-P2 belongs to TI's 74HC logic family, designed specifically for low-power, high-noise-immunity combinatorial logic in space-constrained industrial and instrumentation applications.

FAQ

What logic family does SN74HC32N-P2 belong to, and how does it differ from 74LS variants?

SN74HC32N-P2 is part of the 74HC (High-Speed CMOS) logic family. Unlike 74LS (Low-Power Schottky TTL), it operates from 2 V to 6 V, draws significantly less quiescent current (ICC ≤ 20 µA vs. ~1.6 mA for 74LS32), and features CMOS-compatible input thresholds. Its output drive strength matches LSTTL loads but with rail-to-rail swing and lower power dissipation - making SN74HC32N-P2 ideal for battery-powered or thermally constrained designs where 74LS32 would overheat or exceed supply budgets.

Can SN74HC32N-P2 operate reliably at 3.3 V, and what are the key performance metrics at that voltage?

Yes, SN74HC32N-P2 is fully specified down to 2 V, and at 3.3 V it maintains VOH ≥ 3.15 V (min) and VOL ≤ 0.33 V (max) while driving 4 mA loads. Propagation delay increases to ≤35 ns (max) under 50 pF load, and input thresholds scale proportionally (VIH ≥ 2.0 V, VIL ≤ 0.99 V). This makes SN74HC32N-P2 compatible with 3.3 V microcontrollers and FPGAs without level translation, preserving timing margins in mixed-voltage systems.

How should unused inputs on SN74HC32N-P2 be terminated, and why is this critical?

Unused inputs on SN74HC32N-P2 must be tied to either VCC or GND - never left floating. Floating CMOS inputs cause undefined logic states, increased ICC, and potential oscillation due to noise coupling, which can lead to excessive power dissipation or false triggering. A 10 kΩ pull-up or pull-down resistor is recommended for flexibility; direct connection is acceptable for permanently fixed states. This practice ensures deterministic behavior and prevents shoot-through current in the input stage.

What is the maximum capacitive load SN74HC32N-P2 can drive while meeting datasheet timing specifications?

SN74HC32N-P2 is characterized for CL = 50 pF in its switching specifications (tpd ≤ 25 ns, tt ≤ 19 ns at 4.5 V). While it can drive larger loads, exceeding 70 pF risks violating timing guarantees and increasing transition times. For loads >50 pF, add a series 22–100 Ω resistor at the output to limit peak current and suppress ringing - ensuring compliance with absolute maximum output current (±25 mA) and maintaining signal integrity on longer traces or unterminated lines.

Does SN74HC32N-P2 include ESD protection, and what are its HBM and CDM ratings?

Yes, SN74HC32N-P2 integrates on-die ESD protection diodes on all pins. It is rated for ±2000 V Human Body Model (HBM) per ANSI/ESDA/JEDEC JS-001 and ±750 V Charged-Device Model (CDM) per JEDEC JESD22-C101. These ratings meet standard industrial handling requirements, allowing safe manual assembly and board-level rework without external TVS devices - though proper ESD workstation protocols remain essential for sustained reliability.