Nexperia USA Inc. 74HC32D,652

Overview

74HC32D,652 from Nexperia is a quad 2-input OR gate in SO14 package, operating from 2.0 V to 6.0 V supply, delivering symmetrical output impedance, balanced propagation delays (6–27 ns), and CMOS-level input compatibility. It serves as a fundamental combinational logic building block in digital control subsystems, bus arbitration circuits, and enable-logic combiners for microcontroller peripheral interfaces.

For engineers reviewing the 74HC32D,652 datasheet, 74HC32D,652 pinout, 74HC32D,652 application, or 74HC32D,652 equivalent, key selection considerations include its -40 °C to +125 °C industrial temperature range, 25 mA output drive capability, input clamp diodes enabling overvoltage-tolerant interfacing, and SO14 package compatibility with legacy PCB footprints.

Technical Context

The 74HC32D implements four independent OR gates using standard CMOS silicon technology, with inputs featuring integrated clamp diodes to GND and VCC-enabling safe interface to signals exceeding VCC when used with current-limiting resistors. Each gate exhibits identical electrical behavior, with no internal feedback or state retention.

Its logic function strictly follows Boolean OR: output is HIGH if at least one input is HIGH; LOW only when both inputs are LOW. Propagation delays are matched across all four channels (tpd = 6 ns typ @ VCC = 6.0 V, CL = 50 pF), and output transition times (tt = 6 ns typ) ensure predictable timing in synchronous digital systems.

Key Specifications

Pinout & Package

74HC32D,652 uses the SOT108-1 (SO14) plastic small outline package: 14-pin, 3.9 mm body width, 1.27 mm lead pitch, gull-wing leads, JEDEC MS-012 compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC32D,652, the 74HCT32D,653 offers TTL input compatibility at the cost of higher static current and narrower voltage range, while SN74LVC32APWR delivers faster switching in a compact package but sacrifices input overvoltage protection and wide-supply flexibility.

Availability

74HC32D,652 is available at Aetrix Electronics and suitable for industrial control logic, microcontroller peripheral interface, power sequencing monitor, and legacy bus arbitration requiring stable component supply across extended temperature ranges.

Supply support for 74HC32D,652 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

Nexperia is a global semiconductor expert focused on essential efficiency technologies, delivering high-performance logic, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.

The 74HC32D belongs to Nexperia's HC-series high-speed CMOS logic family, designed specifically for robust, low-power, wide-supply digital interfacing in industrial and automotive-adjacent applications.

FAQ

What is the maximum clock frequency supported by 74HC32D,652?

The 74HC32D,652 is a combinational logic device-not a clocked element-so it has no defined clock frequency. Its usable toggle rate depends on propagation delay and system loading: with 6 ns typical tpd and 50 pF load, it supports clean signal transitions up to approximately 30 MHz in well-designed PCB layouts with proper decoupling.

Can 74HC32D,652 safely interface with 5 V TTL outputs?

No-74HC32D,652 has CMOS-level inputs (VIH ≥ 3.15 V @ VCC = 4.5 V), which may not reliably recognize 5 V TTL HIGH levels (typically 2.4 V min). For guaranteed interoperability with TTL outputs, use the pin-compatible 74HCT32D,653, whose inputs are explicitly TTL-compatible (VIH = 2.0 V min).

Does 74HC32D,652 require external pull-up or pull-down resistors on unused inputs?

Yes-unused inputs must be terminated to VCC or GND. Floating CMOS inputs cause increased supply current, unpredictable logic states, and potential oscillation due to noise coupling. A 10 kΩ resistor to VCC or GND is recommended; never leave inputs open.

Is the SO14 package of 74HC32D,652 RoHS-compliant and halogen-free?

Yes-Nexperia confirms the SOT108-1 package used for 74HC32D,652 meets RoHS Directive 2011/65/EU and is halogen-free per IEC 61249-2-21, with lead finish conforming to JEDEC J-STD-609A Class 3 (matte tin).