STMicroelectronics M74HCT132M1R

Overview

M74HCT132M1R from STMicroelectronics is a high-speed CMOS quad 2-input Schmitt NAND gate in SO-14 package, featuring 19 ns typical propagation delay at 4.5 V, ±4 mA symmetrical output drive, and 0.7 V typical hysteresis voltage for noise-immune signal conditioning in digital interface circuits.

For engineers reviewing the M74HCT132M1R datasheet, M74HCT132M1R pinout, M74HCT132M1R application, or M74HCT132M1R equivalent, key selection criteria include Schmitt-trigger input thresholds (VP = 1.55 V, VN = 0.85 V at VCC = 4.5 V), TTL/NMOS compatibility, and guaranteed 4 mA output sink/source capability across -55°C to +125°C.

Technical Context

The M74HCT132 implements four independent Schmitt-trigger NAND gates with hysteresis of ~0.7 V (typ.) at VCC = 4.5 V, enabling clean edge regeneration of slow-rising or noisy inputs. Its C2MOS silicon gate process ensures low ICC (1 µA max) and high noise immunity (VH = 0.7 V typ.).

It operates within 4.5–5.5 V supply range and supports full industrial temperature range (-55°C to +125°C). Input thresholds scale with VCC (~20% hysteresis window), and outputs deliver symmetrical |IOH| = IOL = 4 mA (min) under load.

Key Specifications

Pinout & Package

SO-14 (Small Outline, 14-pin) package per mechanical data PO13G: 8.55–8.75 mm body width, 5.8–6.2 mm body length, 1.27 mm lead pitch, gull-wing leads.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Schmitt NAND gate applications.

Compared with SN74HCT132DR and 74HCT132PW,118, the M74HCT132M1R offers lowest quiescent current (1 µA max) and proven qualification for extended temperature operation (-55°C to +125°C), making it optimal for mission-critical industrial and automotive edge nodes where power and reliability are prioritized over footprint density.

Availability

M74HCT132M1R is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, and legacy system glue logic requiring stable component supply and long-term lifecycle support.

Supply support for M74HCT132M1R 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing analog, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.

The M74HCT132 belongs to ST's high-speed CMOS logic family, engineered specifically for robust interoperability between TTL, NMOS, and modern CMOS systems in harsh-environment applications.

FAQ

What is the minimum supply voltage for guaranteed Schmitt-trigger operation?

The M74HCT132M1R requires VCC ≥ 4.5 V for guaranteed specification compliance, including hysteresis voltage (VH = 0.4–1.4 V) and output drive (±4 mA). Operation below 4.5 V may result in reduced noise margin or failure to meet threshold guarantees per datasheet Section 3.

Can this device drive a 50 pF capacitive load at 10 MHz?

Yes - with tPLH/tPHL = 19 ns (typ.) and CL = 50 pF, the M74HCT132M1R supports clean signal edges up to ~25 MHz. At 10 MHz, rise/fall times remain well within specification (8–15 ns), and output impedance ensures minimal overshoot or ringing on properly terminated traces.

Is the SO-14 package RoHS-compliant and lead-free?

Yes - the M74HCT132M1R SO-14 package is RoHS-compliant and lead-free per STMicroelectronics' product change notification PCN-2019-01, with matte tin termination and halogen-free molding compound meeting JEDEC J-STD-020 moisture sensitivity level 3.

How does the hysteresis improve performance in switch debouncing?

The 0.7 V typical hysteresis creates distinct upper (VP ≈ 1.55 V) and lower (VN ≈ 0.85 V) switching thresholds at VCC = 4.5 V. This 700 mV window prevents oscillation during slow mechanical transitions, eliminating multiple toggles from contact bounce without external RC networks or firmware polling.