onsemi 74HC32DR2G

Overview

74HC32DR2G from onsemi is a quad 2-input OR gate in high-performance silicon-gate CMOS technology, pin-compatible with LS32. It operates from 2.0 V to 6.0 V, delivers ±25 mA output drive per pin, supports −55 °C to +125 °C operation, and features 13 ns propagation delay at 6.0 V with 50 pF load - used in digital logic interfacing, level translation, and discrete gate-based control circuits.

For engineers reviewing the 74HC32DR2G datasheet, pinout, applications, or equivalent options, key selection criteria include supply voltage range (2.0–6.0 V), guaranteed 13 ns max tPLH/tPHL at 6 V, SOIC-14 Pb-free packaging, LSTTL-load compatibility (10 loads), and industrial temperature support up to +125 °C.

Technical Context

The 74HC32DR2G implements four independent OR logic functions (Y = A + B) using standard CMOS circuitry with buffered outputs. Its inputs accept both CMOS and LSTTL levels (with pullups), and outputs directly interface to CMOS, NMOS, and TTL families without level-shifting.

It complies with JEDEC Standard No. 7A, includes ESD protection (HBM 2000 V), and uses 48 FETs (12 equivalent gates). Unused inputs must be tied to VCC or GND; outputs are not internally clamped and must remain open when unused.

Key Specifications

Pinout & Package

74HC32DR2G is supplied in a Pb-free SOIC-14 package (Case 751A), 8.55 mm × 3.80 mm footprint, 1.75 mm height, with 1.27 mm pitch. Pin 1 is marked by a notch or beveled corner; Pin 7 = GND, Pin 14 = VCC.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74HC32DR and MC74HC32ADTR2G, the 74HC32DR2G uniquely combines SOIC-14 mechanical compatibility, full industrial temperature range (−55 °C to +125 °C), and documented HBM 2000 V ESD robustness - making it preferred for mission-critical embedded control where layout stability and environmental resilience are non-negotiable.

Availability

74HC32DR2G is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, and consumer appliance control panels requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for 74HC32DR2G 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

onsemi (formerly ON Semiconductor) is a global semiconductor manufacturer specializing in energy-efficient power, analog, sensing, and logic solutions for automotive, industrial, cloud, and medical markets.

The 74HC32DR2G belongs to the 74HC high-speed CMOS logic family, designed for drop-in replacement of legacy TTL logic while delivering lower power, higher noise immunity, and wider supply voltage flexibility.

FAQ

What is the maximum operating temperature for the 74HC32DR2G?

The 74HC32DR2G is fully specified from −55 °C to +125 °C across all electrical parameters, including propagation delay, output drive, and input thresholds. This extended temperature range is validated per the onsemi datasheet Rev. 1 (March 2007) and makes the 74HC32DR2G suitable for under-hood automotive and industrial control applications where ambient temperatures exceed +85 °C.

Is the 74HC32DR2G pin-compatible with 74LS32?

Yes, the 74HC32DR2G is explicitly stated in the datasheet to be identical in pinout to the 74LS32. All 14 pins - including VCC (Pin 14), GND (Pin 7), and the four OR gate inputs/outputs - occupy identical positions. However, note that 74HC32DR2G requires appropriate input pullups when interfacing with 74LS outputs to meet VIH/VIL thresholds.

Does the 74HC32DR2G support 3.3 V logic systems?

Yes, the 74HC32DR2G operates over 2.0 V to 6.0 V, and all DC and AC specifications - including VOH ≥ 3.98 V and VOL ≤ 0.26 V at VCC = 3.3 V - are guaranteed across the full temperature range. Its 3.3 V compatibility is confirmed in the "DC CHARACTERISTICS" table (VCC = 3.0 V row) and makes it interoperable with modern microcontrollers and FPGAs.

What is the propagation delay of the 74HC32DR2G at 5 V supply?

At VCC = 5.0 V, CL = 50 pF, and TA = 25 °C, the typical propagation delay (tPLH/tPHL) of the 74HC32DR2G is 15 ns, with a guaranteed maximum of 19 ns over temperature (≤85 °C) and 22 ns at ≤125 °C. These values are extracted from the "AC CHARACTERISTICS" table in the official onsemi datasheet.

Can unused inputs on the 74HC32DR2G be left floating?

No - unused inputs on the 74HC32DR2G must be tied to a valid logic level (VCC or GND) to prevent undefined output states, increased power consumption, and potential oscillation. The datasheet explicitly warns: "Unused inputs must always be tied to an appropriate logic voltage level." Floating CMOS inputs exhibit high impedance and susceptibility to noise-induced switching.