Texas Instruments SN74F32DG4

Overview

SN74F32DG4 from Texas Instruments is a quadruple 2-input positive-OR gate IC in SOIC-14 package, operating at 4.5–5.5 V supply, with propagation delays as low as 2.2 ns (tPLH/tPHL), 20 mA low-level output drive, and rated for 0°C to 70°C industrial temperature range. It implements Boolean Y = A + B logic in TTL-compatible positive logic and is used in digital control signal combining, bus arbitration, and enable logic in legacy industrial controllers.

For engineers reviewing the SN74F32DG4 datasheet, SN74F32DG4 pinout, SN74F32DG4 application, or SN74F32DG4 equivalent, key selection criteria include guaranteed 20 mA sink capability, sub-7 ns max propagation delay at 5 V, SOIC-14 RoHS-compliant packaging with NIPDAU lead finish, and compatibility with 5 V TTL logic families in space-constrained PCB layouts.

Technical Context

This device integrates four independent OR gates on a single silicon die using bipolar F-type (fast TTL) process technology. Each gate exhibits standard TTL input thresholds (VIL = 0.8 V, VIH = 2.0 V) and totem-pole outputs without three-state capability. No internal clamping diodes are integrated beyond standard ESD protection.

Timing behavior is characterized under controlled 50 pF load conditions per JEDEC standards, with tPLH/tPHL specified at 2.2–6.6 ns across temperature and voltage. Power consumption is defined by ICCL (10.3–15.5 mA) and ICCH (6.1–9.2 mA) at VCC = 5.5 V, reflecting typical fast-TTL static current draw.

Key Specifications

Pinout & Package

SN74F32DG4 uses the industry-standard SOIC-14 (D) package, 8.75 mm × 3.91 mm body size, 1.27 mm lead pitch, and 1.75 mm maximum height. Pin 1 is marked by a beveled corner or notch on the package top edge.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 2-input OR gate applications.

Compared with SN74F32DG4, SN74LS32N offers lower power but sacrifices >3× speed and half the output drive; SN74HC32DR enables wide-supply operation but lacks the 20 mA sink strength and TTL input compatibility essential for direct integration into existing 5 V TTL signal chains.

Availability

SN74F32DG4 is available at Aetrix Electronics and suitable for industrial PLCs, legacy computer peripherals, power sequencing monitors, and automated test equipment requiring stable component supply and long-term obsolescence management.

Supply support for SN74F32DG4 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 U.S.-based semiconductor company founded in 1930, specializing in analog, embedded processing, and logic solutions with global manufacturing and quality certification infrastructure.

SN74F32DG4 belongs to TI's 74F (Fast TTL) logic family, designed specifically for high-speed digital control, data path steering, and interface logic in 5 V systems where propagation delay and drive strength outweigh ultra-low-power requirements.

FAQ

What is the maximum supply voltage for SN74F32DG4?

The absolute maximum supply voltage for SN74F32DG4 is 7 V, but the recommended operating range is strictly 4.5 V to 5.5 V. Operation above 5.5 V risks parametric shift or accelerated wear-out; TI specifies all electrical characteristics only within the 4.5–5.5 V window. Exceeding 7 V may cause permanent damage per the absolute maximum ratings table in the SDFS044B datasheet.

Can SN74F32DG4 drive standard TTL inputs directly?

Yes, SN74F32DG4 can drive standard TTL inputs directly: its –1 mA IOH and 20 mA IOL meet or exceed the input current requirements of 74-series TTL devices (IIH ≤ 40 µA, IIL ≥ –1.6 mA). The SN74F32DG4 output VOH (≥2.5 V) and VOL (≤0.5 V) also satisfy TTL logic thresholds, enabling seamless interconnection without level-shifting circuitry.

Is SN74F32DG4 pin-compatible with SN74F32N?

Yes, SN74F32DG4 and SN74F32N share identical pinout, logic function, and DC/AC specifications - both follow the standard 14-pin DIP/SOIC layout shown in the logic diagram and pin map of SDFS044B. The only differences are package type (SOIC vs PDIP), thermal impedance (127°C/W vs 78°C/W), and moisture sensitivity (MSL Level-1 vs non-applicable), not pin assignment or signal routing.

Does SN74F32DG4 support three-state or open-collector outputs?

No, SN74F32DG4 does not support three-state or open-collector outputs. It features standard totem-pole push-pull outputs with no output-enable control. All four gates operate continuously; there is no provision for high-impedance states. This is explicitly confirmed by the absence of OE pins, disable timing waveforms, or "Z" state entries in the function table or switching characteristics section of the SDFS044B datasheet.

What is the recommended handling for unused inputs on SN74F32DG4?

All unused inputs on SN74F32DG4 must be tied either to VCC or GND - floating inputs are prohibited. TI's SCBA004 application report confirms that unconnected TTL inputs can drift into the linear region, causing excessive supply current, oscillation, or unpredictable output states. For OR gates, tying unused inputs to GND ensures they do not affect the logical output (since A + 0 = A), preserving intended functionality.