STMicroelectronics 74LVC32AMTR

Overview

74LVC32AMTR from STMicroelectronics is a low-voltage CMOS quad 2-input OR gate operating from 1.65 V to 3.6 V, delivering 4.2 ns max propagation delay at 3 V, ±24 mA symmetrical output drive, and 5V-tolerant inputs for mixed-voltage interfacing in 3.3 V systems. It is used in bus interface logic, level translation, and digital signal routing in industrial control and embedded I/O expansion.

For engineers reviewing the 74LVC32AMTR datasheet, 74LVC32AMTR pinout, 74LVC32AMTR application, or 74LVC32AMTR equivalent, key selection criteria include guaranteed PCI bus compatibility at 24 mA, latch-up immunity >500 mA (JESD17), and power-down protection on all I/Os for hot-swap and partial-power-down operation.

Technical Context

The 74LVC32AMTR implements four independent OR logic functions using sub-micron C2MOS technology with double-layer metal interconnect, enabling high-speed switching while maintaining low dynamic power consumption. Its input structure supports 5 V tolerance without external clamping, and its output stage delivers matched |IOH| = |IOL| = 24 mA (min) at VCC = 3.0–3.6 V.

Propagation delays are balanced (tPLH ≅ tPHL), with skew ≤1 ns across outputs under identical switching conditions. The device features built-in ESD protection (>2 kV HBM, >200 V MM) and power-off isolation, ensuring robustness during system power sequencing and transient events.

Key Specifications

Pinout & Package

74LVC32AMTR is supplied in a 14-pin SOIC (Small Outline Integrated Circuit) tape-and-reel package (SO-14), with body dimensions 8.55–8.75 mm × 3.8–4.0 mm and 1.27 mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC32APWR and 74AHC32PW,118, the 74LVC32AMTR uniquely combines SOIC manufacturability, 5 V input tolerance, and PCI-compliant drive strength-making it optimal for industrial fieldbus interfaces where reliability, legacy compatibility, and through-hole or SOIC assembly coexist.

Availability

74LVC32AMTR is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, embedded microcontroller bus interface, and PCI-compatible peripheral control requiring stable component supply across extended temperature ranges (–55 °C to +125 °C).

Supply support for 74LVC32AMTR 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, Switzerland, designing and manufacturing analog, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.

The 74LVC series targets low-voltage, high-speed logic applications in mixed-supply systems, emphasizing interoperability, power efficiency, and robustness in harsh environments.

FAQ

Is 74LVC32AMTR compatible with 5 V logic inputs?

Yes. All inputs are 5 V tolerant across the full operating VCC range (1.65–3.6 V), allowing direct connection to 5 V signal sources without external clamping diodes or level shifters. This is verified per absolute maximum ratings (VI = –0.5 to +7.0 V) and functional operation up to 5.5 V input voltage.

What is the maximum output current per pin at 2.5 V supply?

At VCC = 2.3–2.7 V, the minimum guaranteed output current is ±8 mA for both high and low states. This is specified in Table 6 under "High or Low Level Output Current" and supports driving two LVC inputs or one LVTTL input under typical load conditions.

Does 74LVC32AMTR support hot-swap or partial power-down operation?

Yes. It features power-down protection on all inputs and outputs, meaning I/O pins remain high-impedance and non-destructive when VCC = 0 V. Input leakage (Ioff) is limited to 10 µA at 5.5 V, and outputs do not back-drive, satisfying hot-swap requirements in modular systems.

Can 74LVC32AMTR replace older 74LS32 in existing designs?

Yes, with design validation. It is pin- and function-compatible with 74-series 32 gates, but operates at lower voltage (1.65–3.6 V vs 4.75–5.25 V) and offers faster speed (4.2 ns vs ~15 ns), lower power, and 5 V input tolerance. Verify VCC source compatibility and update decoupling per LVC recommendations.