Texas Instruments SN74HC10DR

Overview

SN74HC10DR from Texas Instruments is a triple 3-input NAND gate IC in SOIC-14 package, performing Y = A ● B ● C 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 mA output drive at 4.5 V, supports fanout of 10 LSTTL loads, and is used in tamper-detect circuits and S-R latch implementations.

For engineers reviewing the SN74HC10DR datasheet, SN74HC10DR pinout, SN74HC10DR application, or SN74HC10DR equivalent, this page provides verified functional identity, validated SOIC-14 pin mapping, confirmed electrical specs (VOH/VOL, tpd, ICC), real-world use cases including alarm logic and latch design, and two technically documented alternative parts for design flexibility.

Technical Context

The SN74HC10DR implements three independent, fully buffered 3-input NAND gates using standard CMOS technology with balanced push-pull outputs capable of sourcing and sinking up to ±4 mA at 4.5 V. Its inputs exhibit high impedance (≤1 µA leakage) and require fast edge rates (≤500 ns transition at 4.5 V) to prevent oscillation.

Each gate operates across 2–6 V supply with rail-to-rail output swing, defined by VOH ≥ 3.98 V and VOL ≤ 0.26 V under 4 mA load at 4.5 V, and achieves typical propagation delay of 19 ns with 50 pF load. The device includes internal clamp diodes on all I/O pins for ESD protection but requires external bypassing (0.1 µF near VCC/GND).

Key Specifications

Pinout & Package

SN74HC10DR is housed in a 14-pin SOIC (D) package measuring 8.70 mm × 3.90 mm, RoHS-compliant with NiPdAu lead finish and Level-1 moisture sensitivity rating.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 3-input NAND gate applications.

Compared with SN74HC10DR, SN74HCT10DR offers improved input compatibility with older TTL families but sacrifices some power efficiency, while MC74HC10ADR2G provides identical performance with automotive qualification-making it suitable for harsh-environment deployments where SN74HC10DR's industrial rating suffices.

Availability

SN74HC10DR is available at Aetrix Electronics and suitable for industrial control interfaces, tamper-detection systems, S-R latch implementations, and legacy system glue logic requiring stable component supply and long-term manufacturability.

Supply support for SN74HC10DR 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 SN74HC10DR belongs to TI's 74HC high-speed CMOS logic family, designed for low-power, wide-voltage-range digital interfacing in industrial automation, security systems, and equipment control panels.

FAQ

What is the maximum capacitive load SN74HC10DR can drive while maintaining specified timing?

SN74HC10DR is characterized for loads ≤ 70 pF in the switching specifications. At 4.5 V supply and 25°C, it delivers 19 ns typical propagation delay with 50 pF load. Driving >70 pF increases tpd nonlinearly and may cause ringing; TI recommends adding a series resistor (e.g., 33 Ω) between output and heavy capacitive loads to limit peak current and preserve signal integrity in the SN74HC10DR design.

Can unused inputs on SN74HC10DR be left floating?

No - unused inputs on SN74HC10DR must be terminated to either VCC or GND to prevent undefined logic states, increased power consumption, or oscillation. TI specifies that floating CMOS inputs induce shoot-through current due to indeterminate threshold crossing. A 10-kΩ pull-up or pull-down resistor is recommended for unused SN74HC10DR inputs to ensure stable HIGH or LOW bias within the VIH/VIL windows.

Does SN74HC10DR support mixed-voltage operation between its inputs and outputs?

SN74HC10DR does not support true mixed-voltage operation: all inputs and outputs reference the same VCC rail (2–6 V). However, its wide input voltage thresholds (VIH = 3.15 V min at 4.5 V VCC) allow reliable recognition of 3.3 V logic HIGH signals when powered from 4.5 V or 5 V, enabling interoperability with lower-voltage controllers without level shifters - a key capability confirmed in the SN74HC10DR datasheet's Recommended Operating Conditions table.

What is the thermal resistance (RθJA) of SN74HC10DR in its SOIC-14 package?

The junction-to-ambient thermal resistance (RθJA) for SN74HC10DR in the SOIC-14 (D) package is 133.6°C/W, as specified in Section 6.3 of the official datasheet. This value assumes standard JEDEC 2-layer board conditions. Actual thermal performance improves with PCB copper area, thermal vias, and airflow; for continuous operation near maximum ICC, derating or thermal simulation using this RθJA is advised in SN74HC10DR system layouts.

Is SN74HC10DR pin-compatible with older 74LS10 devices?

Yes - SN74HC10DR uses the same 14-pin SOIC footprint and identical pinout as SN74LS10, including matching assignments for all inputs (1A–3C), outputs (1Y–3Y), VCC (Pin 14), and GND (Pin 7). This allows direct replacement in existing designs, though designers must verify that the higher output drive and rail-to-rail swing of SN74HC10DR do not overload downstream inputs rated only for TTL voltage levels.