Texas Instruments CD74HCT10M

Overview

CD74HCT10M from Texas Instruments is a triple 3-input NAND gate IC operating in positive logic (Y = A ● B ● C), designed for digital logic interfacing and combinational control functions. It features buffered CMOS inputs, operates across 2 V to 6 V supply voltage, supports –55°C to +125°C industrial/military temperature range, delivers propagation delay as low as 7 ns at 6 V, and drives up to 10 LSTTL loads - used in tamper-detect circuits and S-R latch implementations.

For engineers reviewing the CD74HCT10M datasheet, CD74HCT10M pinout, CD74HCT10M application, or CD74HCT10M equivalent, key selection considerations include its SOIC-14 package, HCT-level TTL-compatible input thresholds, fanout capability, propagation delay vs. supply voltage dependency, and unused-input termination requirements.

Technical Context

This device implements three independent 3-input NAND gates using silicon-gate CMOS technology with TTL-compatible input thresholds (VIH = 2.0 V min at VCC = 4.5 V; VIL = 0.8 V max). Each gate exhibits balanced push-pull output drive capable of sourcing/sinking ±4 mA at 4.5 V while maintaining VOH ≥ 3.98 V and VOL ≤ 0.26 V under load.

It uses standard CMOS inputs with 10 pF typical input capacitance and ±0.1 µA max input leakage at 6 V, enabling low static power consumption (ICC ≤ 40 µA over full temperature range) and compatibility with mixed-voltage system interfaces where level translation is not required.

Key Specifications

Pinout & Package

CD74HCT10M is housed in a 14-pin SOIC (D) package measuring 8.70 mm × 3.90 mm with standard JEDEC MS-012AC outline and gull-wing leads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CD74HCT10M, SN74HCT10DR offers assured supply continuity and identical performance, while MC74HC10ADR2G trades TTL compatibility for lower static power but requires stricter input voltage compliance - making CD74HCT10M optimal for mixed-signal or legacy interface scenarios.

Availability

CD74HCT10M is available at Aetrix Electronics and suitable for alarm/tamper detect circuits, S-R latch implementations, industrial control logic, and legacy system interface adapters requiring stable component supply across extended temperature ranges.

Supply support for CD74HCT10M 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 company specializing in analog and embedded processing technologies, with leadership in logic, power management, and signal chain products.

CD74HCT10M belongs to the CD74HCT logic family, engineered for TTL-compatible operation in harsh environments - targeting industrial automation, defense systems, and automotive subsystems demanding robustness and interoperability.

FAQ

What is the recommended supply decoupling for CD74HCT10M?

A 0.1 µF ceramic capacitor placed physically adjacent to the VCC and GND pins is mandatory for stable operation of CD74HCT10M. This minimizes high-frequency supply noise and prevents output ringing during fast transitions. For systems with significant EMI, paralleling a 1 µF capacitor is acceptable - but placement proximity remains critical. Failure to implement proper decoupling may cause metastability or increased propagation delay variation in CD74HCT10M.

Can unused inputs on CD74HCT10M be left floating?

No, unused inputs on CD74HCT10M must never be left floating. They must be tied to either VCC or GND using direct connection or a pull-up/pull-down resistor (typically 10 kΩ). Floating inputs cause undefined logic states, increased ICC current, and potential oscillation due to noise coupling - all violating CD74HCT10M's absolute maximum ratings. This requirement applies to all three gates, including partially used ones like two-input configurations.

Is CD74HCT10M pin-compatible with CD74HC10M?

Yes, CD74HCT10M is pin-compatible with CD74HC10M and shares identical SOIC-14 pinout and package dimensions. However, CD74HCT10M uses TTL-compatible input thresholds (VIH = 2.0 V min at 4.5 V), whereas CD74HC10M uses CMOS thresholds (VIH = 3.15 V min). This difference affects interoperability with 3.3 V drivers - CD74HCT10M reliably interprets them as HIGH, while CD74HC10M may not. Both remain drop-in replacements for layout purposes.

What is the maximum capacitive load CD74HCT10M can drive while meeting datasheet timing specs?

CD74HCT10M is characterized for CL = 15 pF (typical propagation delay 7 ns at 6 V) and CL = 50 pF (delay 26 ns at 6 V). To maintain guaranteed timing performance per datasheet, total load capacitance - including trace, probe, and input capacitance of driven devices - should not exceed 50 pF. Exceeding this value increases tpd nonlinearly and may violate setup/hold margins in synchronous systems using CD74HCT10M outputs as clocks or control signals.

Does CD74HCT10M support mixed-voltage operation between input and output domains?

No, CD74HCT10M does not support true mixed-voltage operation. Its VCC pin defines both input threshold references and output HIGH/LOW voltage levels. All inputs must swing relative to the same VCC, and all outputs reference that same rail. While it accepts 3.3 V logic inputs at VCC = 5 V (due to TTL-compatible VIH), it cannot simultaneously drive 3.3 V–only receivers without level-shifting circuitry - the output swing remains 0 V to VCC. This constraint applies uniformly across all three gates in CD74HCT10M.