Texas Instruments SN74AHC1G32DCKT

Overview

SN74AHC1G32DCKT from Texas Instruments is a single 2-input positive-OR gate logic IC operating from 2 V to 5.5 V, delivering 6.5 ns max propagation delay at 5 V, ±8 mA output drive, and Schmitt-trigger inputs for noise immunity-used in portable audio docks, SSD power sequencing, and enterprise tablet I/O conditioning.

For engineers reviewing the SN74AHC1G32DCKT datasheet, SN74AHC1G32DCKT pinout, SN74AHC1G32DCKT application, or SN74AHC1G32DCKT equivalent, key selection criteria include its SC70-5 package footprint, 5-pin functional mapping, low ICC (≤10 µA), 5.5 V input-tolerant logic interface, and compatibility with 3.3 V/5 V mixed-signal bus translation.

Technical Context

The SN74AHC1G32DCKT implements a CMOS-based Boolean OR function (Y = A + B) with balanced push-pull outputs and no internal pull-ups or enable control. Its Schmitt-trigger inputs accept slow-rising signals and tolerate input voltages up to 5.5 V regardless of VCC level, enabling down-translation from 5 V to 3.3 V domains.

It operates across –40°C to +125°C with thermal resistance RθJA = 293.4°C/W (SC70), supports 15 pF and 50 pF load switching, and exhibits 14 pF typical power dissipation capacitance at 1 MHz-optimized for low-noise, low-ringing digital interfacing where edge rate control is critical.

Key Specifications

Pinout & Package

SN74AHC1G32DCKT uses the SC70-5 (DCK) package: 2.00 mm × 2.10 mm body size, 5-pin surface-mount outline with gull-wing leads, moisture sensitivity level 1, and lead finish NiPdAu.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74AHC1G32DCKT, SN74LVC1G32DCKT offers wider low-voltage support but sacrifices noise immunity, while SN74AHC1G02DCKT provides identical physical integration but requires redesign of upstream logic to accommodate NAND instead of OR behavior.

Availability

SN74AHC1G32DCKT is available at Aetrix Electronics and suitable for SSD power sequencing, portable audio dock control, and enterprise tablet I/O conditioning requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for SN74AHC1G32DCKT 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 specializing in analog, embedded processing, and logic solutions, with decades of expertise in high-reliability logic families and automotive-grade qualification.

The SN74AHC1G32 belongs to TI's AHC logic series-designed for low-power, high-speed CMOS interfacing in portable, industrial, and storage applications where voltage translation and noise resilience are essential.

FAQ

What is the maximum supply voltage for SN74AHC1G32DCKT?

The absolute maximum supply voltage for SN74AHC1G32DCKT is 7 V, but the recommended operating range is 2 V to 5.5 V per TI's SCLS317Q datasheet. Operating above 5.5 V risks exceeding electrical specifications and may cause reliability degradation. The SN74AHC1G32DCKT must be powered within this 2–5.5 V window for guaranteed functionality and lifetime performance.

Does SN74AHC1G32DCKT support 5 V to 3.3 V level translation?

Yes, SN74AHC1G32DCKT supports 5 V to 3.3 V level translation via its 5.5 V input-tolerant Schmitt-trigger inputs-inputs accept up to 5.5 V regardless of VCC level. When VCC = 3.3 V, the SN74AHC1G32DCKT correctly interprets 5 V logic highs and outputs 3.3 V-compatible levels, making it suitable for mixed-voltage bus interfacing without external resistors or translators.

What is the thermal resistance (RθJA) of SN74AHC1G32DCKT?

The junction-to-ambient thermal resistance (RθJA) of SN74AHC1G32DCKT in its SC70-5 (DCK) package is 293.4°C/W, as specified in Section 5.4 of the TI datasheet SCLS317Q. This value assumes standard JEDEC test conditions (1s² copper pad, no airflow). Actual board-level RθJA will vary depending on PCB copper area, layer count, and thermal vias.

Can unused inputs on SN74AHC1G32DCKT be left floating?

No, unused inputs on SN74AHC1G32DCKT must not be left floating. Per TI's datasheet Section 8.4.1 and application note SCBA004, all unused CMOS inputs-including those on SN74AHC1G32DCKT-must be tied to VCC or GND to prevent undefined logic states, increased ICC, and potential device malfunction due to noise coupling.

Is SN74AHC1G32DCKT pin-compatible with other SC70-5 logic gates?

SN74AHC1G32DCKT shares the SC70-5 (DCK) 5-pin footprint and pinout (A-B-GND-Y-VCC) with other TI single-gate logic devices like SN74AHC1G02DCKT and SN74LVC1G32DCKT, enabling direct PCB footprint reuse. However, functional equivalence requires verification of truth table, drive strength, and input characteristics-pin compatibility does not guarantee drop-in substitution.