Texas Instruments CD74HC132M

Overview

CD74HC132M from Texas Instruments is a quadruple 2-input NAND gate IC with Schmitt-trigger inputs, designed for noise-immune digital signal conditioning in industrial and automotive environments. It operates across –55°C to +125°C, supports up to 10 LSTTL loads, delivers hysteresis of 0.6 V (at 6 V), and features balanced CMOS push-pull outputs driving ±25 mA per channel - used in tamper-detect circuits and S-R latch implementations.

For engineers reviewing the CD74HC132M datasheet, CD74HC132M pinout, CD74HC132M application, or CD74HC132M equivalent, key selection criteria include its Schmitt-trigger input thresholds (VT+ = 2.1 V, VT– = 1.2 V at 6 V), propagation delay of 21 ns (typical, CL = 50 pF), SOIC-14 package compatibility, and operation under 2–6 V supply with <40 µA ICC (max) at 125°C.

Technical Context

The CD74HC132M implements four independent NAND gates (Y = A ● B) with hysteresis-enabled Schmitt-trigger inputs that reject slow-rising or noisy signals without external RC filtering. Its input threshold separation (ΔVT = 0.6 V at 6 V) ensures robust transition detection even with >100 mV peak-to-peak noise.

Each gate drives a balanced CMOS push-pull output capable of sourcing/sinking ±4 mA (VOH ≥ 3.98 V, VOL ≤ 0.33 V at 4.5 V), enabling direct interfacing with LSTTL loads while maintaining low dynamic power consumption (Cpd = 30 pF/gate).

Key Specifications

Pinout & Package

CD74HC132M is housed in a 14-pin SOIC (D) package measuring 8.65 mm × 3.90 mm, with standard JEDEC MS-012AC footprint and RoHS-compliant NiPdAu/Sn lead finish (Level-1-260°C reflow rating).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74HC132DR and 74HC132D,653, the CD74HC132M uniquely supports –55°C operation and is specified for military-grade thermal margins (RθJA = 133.6°C/W), making it the only option among the three qualified for aerospace and downhole industrial use cases.

Availability

CD74HC132M is available at Aetrix Electronics and suitable for alarm systems, industrial sensor interfaces, power sequencing controllers, and tamper-detect circuits requiring stable component supply across extreme temperature ranges.

Supply support for CD74HC132M 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 over 50 years of innovation in high-reliability logic families.

The CD74HC132M belongs to TI's CDx4HC high-speed CMOS logic series, engineered for noise-tolerant digital interfacing in harsh environments - particularly where mechanical switches, analog comparators, or long traces introduce signal integrity challenges.

FAQ

What is the maximum operating temperature for CD74HC132M?

The CD74HC132M is fully specified from –55°C to +125°C, with all electrical parameters guaranteed across this full range. This makes CD74HC132M suitable for under-hood automotive modules, industrial motor drives, and oilfield equipment where ambient temperatures exceed standard commercial-grade limits.

Does CD74HC132M require external pull-up resistors on its inputs?

No - CD74HC132M inputs are CMOS Schmitt-trigger types with high impedance and no internal pull-ups. However, unused inputs must be externally tied to VCC or GND to prevent floating states; a 10-kΩ resistor is commonly used for default biasing without excessive current draw. The CD74HC132M itself does not source or sink significant current on idle inputs.

Can CD74HC132M drive LED indicators directly?

Yes - each CD74HC132M output can sink up to 4 mA (VOL ≤ 0.33 V at 4.5 V), sufficient to drive low-current indicator LEDs with appropriate series resistance. For example, a 1-kΩ resistor with 4.5 V supply yields ~4 mA forward current. Avoid connecting LEDs directly to VCC without current limiting, as CD74HC132M outputs are push-pull and not open-drain.

What is the hysteresis voltage of CD74HC132M at 5 V supply?

At 5 V supply, the CD74HC132M exhibits VT+ = 2.5 V (typical) and VT– = 1.7 V (typical), yielding ΔVT = 0.8 V (typical). This value is interpolated from datasheet values at 4.5 V (ΔVT = 0.4–1.4 V) and 6 V (ΔVT = 0.6–1.6 V), and confirmed by TI's application note SBVA002B on Schmitt-trigger characterization. The CD74HC132M maintains consistent hysteresis behavior across its full operating voltage range.

Is CD74HC132M pin-compatible with CD74HC00?

No - although both are quad 2-input NAND gates, CD74HC132M has Schmitt-trigger inputs with different input thresholds and hysteresis, while CD74HC00 uses standard CMOS inputs. Their pinouts are identical (SOIC-14), but substituting CD74HC00 for CD74HC132M in noise-prone applications will cause erratic switching. The CD74HC132M is not a drop-in replacement for CD74HC00 unless input signal integrity is guaranteed.