MC74ACT32DR2G Complete Guide: 5V Quad 2-Input OR Gate Specs, Pinout, Alternatives and Sourcing (2026)

What is the MC74ACT32DR2G and what does it do?

The MC74ACT32DR2G from onsemi is a quad 2-input OR gate from the 74ACT32 logic family, supplied in a 14-pin SOIC package on tape and reel. It contains four independent 2-input OR gates in a single silicon die: each gate's output is HIGH whenever at least one of its two inputs is HIGH. The device runs from a single 4.5 V to 5.5 V VCC supply with 5.0 V as the nominal rail, and provides TTL-compatible input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V), ±24 mA source/sink output drive, and a maximum propagation delay of 9 ns at 5 V with a 50 pF load.

As of 2026-10-06, the MC74ACT32DR2G is in active production with 99,999 units of stock available through XAIPART's distribution channel. Pricing follows a six-tier schedule verified against the database: $0.41 at qty 1, $0.32 at qty 10, $0.24 at qty 100, $0.19 at qty 500, $0.16 at qty 1,000, and $0.13 at qty 2,500. MOQ is 1 unit and the part ships RoHS-compliant on tape and reel.

The ACT subfamily was developed by onsemi to ease migration from legacy bipolar 74LS/74F TTL designs to CMOS. It preserves the TTL-compatible input thresholds that 5 V systems expect while delivering the lower quiescent current and rail-to-rail output swing of CMOS. Per the verified datasheet, quiescent current is reduced by approximately 50% versus the equivalent bipolar 74LS32. Engineers reach for the MC74ACT32DR2G when they need a drop-in 5 V glue-logic block that drives LEDs, decodes addresses, or combines control signals without the power penalty of an LS32.

Engineer takeaway: if you are designing a 5 V system and need a fast, cheap, well-documented OR function, the MC74ACT32DR2G is a stock part with stable pricing and immediate availability. See the verified MC74ACT32DR2G product page for current stock and tier breaks.

How do you design with the MC74ACT32DR2G in a 5 V system?

The MC74ACT32DR2G is a 5 V-only part. The four gates share VCC on pin 14 and GND on pin 7. Each gate uses two dedicated input pins and one output pin, so the SOIC-14 footprint maps cleanly to four independent OR functions on the same board. The verified pinout is: pin 1 = 1A, pin 2 = 1B, pin 3 = 1Y, pin 4 = 2A, pin 5 = 2B, pin 6 = 2Y, pin 7 = GND, pin 8 = 3Y, pin 9 = 3A, pin 10 = 3B, pin 11 = 4Y, pin 12 = 4A, pin 13 = 4B, pin 14 = VCC.

Decoupling is non-negotiable. Place a 0.1 µF ceramic capacitor as close as possible to pin 14 (VCC), and pair it with a 1 µF bulk cap on the same rail when more than two outputs toggle simultaneously. The ACT family draws dynamic current only when its outputs transition; a starved bypass causes supply droop that couples into the TTL-compatible input thresholds and can corrupt downstream logic.

Unused inputs must be tied to VCC or GND, never left floating. A floating ACT input can drift into the linear region between VIL and VIH, causing shoot-through current in the input stage that inflates ICC and can overheat the die. Tie HIGH through a 10 kΩ resistor or directly to the rail.

Trace discipline matters at the 9 ns timing budget. The 9 ns maximum tpd at 5 V/50 pF assumes short, matched traces on the input side. In address-decoding networks where skew between gate inputs matters, route the A and B inputs as parallel traces of equal length and avoid stubs. For bus-arbitration outputs, the 24 mA drive can handle moderate-length backplane traces before the rise time degrades noticeably.

The TTL-compatible input thresholds give 1.2 V of DC noise margin at 5 V. With VIH = 2.0 V, the margin to VCC = 3.0 V; with VIL = 0.8 V, the margin to GND = 0.8 V. This margin is the engineering reason CMOS outputs from a 5 V microcontroller or FPGA will be read as valid logic HIGH by the MC74ACT32DR2G even when the CMOS drivers swing rail-to-rail. The same is true in reverse: 3.3 V CMOS outputs from a low-voltage MCU exceed VIH = 2.0 V, so the ACT inputs see them as logic HIGH without a level shifter, making the part useful as a 3.3 V-to-5 V glue stage.

The ±24 mA output drive is symmetric. The output stage can source 24 mA into a load tied to GND, or sink 24 mA from a load tied to VCC. This is enough to drive a 5 V LED indicator through a 150 Ω to 330 Ω series resistor without an external driver transistor. For relays, motors, or high-current busses, buffer the ACT output with an external MOSFET or bipolar driver.

Operating temperature is -40 °C to +85 °C, covering both commercial and industrial environments. The part is RoHS-compliant and ESD-protected on all pins per the onsemi datasheet. For automotive-grade requirements (AEC-Q100), source the SN74ACT32DRQ1 from Texas Instruments instead, which is a qualified alternative within the same 74ACT32 family.

Do not operate the MC74ACT32DR2G below 4.5 V or above 5.5 V. The 5 V-only constraint is firm: for 3.3 V rails, use the 74LVC32 family instead. LVC32 operates from 1.65 V to 3.6 V and provides 5 V-tolerant inputs, which is the correct drop-in when the system rail moves below 3.3 V.

Engineer takeaway: 0.1 µF + 1 µF near pin 14, tie unused inputs to VCC or GND, route inputs as matched short traces, and the MC74ACT32DR2G will switch cleanly at 9 ns in any 5 V design. For context on how this part fits into MCU-based glue logic, see the ATMEGA3209-AU 8-bit megaAVR MCU guide on the XAIPART blog.

What are the drop-in alternatives to the MC74ACT32DR2G?

The MC74ACT32DR2G has six pin-compatible alternates in the same 14-pin SOIC footprint. All share the 5 V ACT logic family, TTL-compatible inputs, and approximately 9 ns propagation delay. The differences are in packaging format, temperature grade, and manufacturer. Cross-reference data from the verified FAQ confirms each alternative is a true drop-in on the same PCB footprint.

For cost-sensitive designs, the onsemi MC74ACT32DR2G is the baseline at $0.13 per unit at qty 2,500 as of 2026-10-06. For dual-sourcing on a single PCB, the SN74ACT32DR from Texas Instruments is the canonical second source and is functionally identical to the onsemi part per cross-reference data. For extended-temperature military applications (-55 °C to +125 °C), the CD74ACT32M from TI is pin-compatible but spec'd over the wider military range. For tubes instead of tape-and-reel, the MC74ACT32DG or SN74ACT32D drops in without PCB rework. The 74ACT32SCX is a Fairchild-sourced onsemi equivalent that shares the same die and footprint.

Engineer takeaway: the SN74ACT32DR is the best dual-source baseline, the CD74ACT32M is the military-temp upgrade on the same footprint, and the MC74ACT32DG is the tube-packaged variant for prototype builds. Browse all six alternates on the XAIPART component catalog.

What is the supply and lifecycle status of the MC74ACT32DR2G?

The MC74ACT32DR2G is in active production at onsemi. Lifecycle status is verified active as of 2026-10-06, and the part is not flagged for obsolescence, last-time-buy, or PCN withdrawal. The SOIC-14 ACT32 family is one of the longest-running logic families in onsemi's portfolio and continues to serve new designs as well as legacy 5 V upgrades.

Distributor stock is healthy: 99,999 units are listed through the XAIPART channel. Major distributors including DigiKey, Mouser, Arrow, and LCSC also stock the part with same-day shipping for orders placed before cut-off as of 2026-10-05. LCSC lists the part at $0.1328 per unit in tape-and-reel packaging as of 2026-10-05. Lead time for direct-from-onsemi volume orders is typically 8-12 weeks; for prototype quantities, distributor stock is the faster path.

There is no allocation risk for the MC74ACT32DR2G as of this writing. The ACT family is manufactured on onsemi's mature CMOS logic lines, which are not constrained by the advanced-node capacity issues that affect microcontrollers and high-performance logic. Buyers should expect stable pricing through 2026-2027 absent an unusual commodity swing.

The main supply-side risk for any 5 V logic IC is the broader industry migration to 3.3 V and lower-voltage rails. As more systems move to LVC and AUC families, ACT demand contracts at the low end. onsemi has not announced end-of-life for the 74ACT32 family, and TI continues to ship the SN74ACT32DR alongside its own ACT portfolio. Expect the MC74ACT32DR2G to remain a stock item for industrial and automotive-grade 5 V designs for the next five years, supported by the entrenched base of installed 5 V equipment, PLCs, test instruments, and legacy communication infrastructure.

Engineer takeaway: active lifecycle, healthy distributor stock, no PCN or obsolescence risk as of 2026-10-06. Plan BOM with confidence for the next product cycle. For related 5 V MCU sourcing context, see the LPC804M101JHI33Y Cortex-M0+ MCU guide on the XAIPART blog.

What trends should buyers watch when sourcing the MC74ACT32DR2G?

Three trends matter to a buyer evaluating the MC74ACT32DR2G in 2026-2027: the broader 5 V-to-3.3 V system migration, the increasing relevance of wide-temperature-grade logic for industrial and automotive markets, and the strategic value of multi-source ACT32 footprints.

First, the 5 V-to-3.3 V migration. New designs in IoT, wearables, and battery-powered devices have largely moved to 3.3 V or 1.8 V rails. The MC74ACT32DR2G is a 5 V-only part with a minimum VCC of 4.5 V; it will not function correctly at 3.3 V. If your system runs at 3.3 V or below, use the 74LVC32 family instead, which operates from 1.65 V to 3.6 V and provides 5 V-tolerant inputs. For new designs that need to coexist with legacy 5 V peripherals, the ACT32 family remains the cheapest, fastest path; for greenfield designs on low-voltage rails, choose LVC32.

Second, wide-temperature logic. The -40 °C to +85 °C operating range covers most commercial and industrial use cases, but automotive under-hood and military applications require -55 °C to +125 °C or wider. The CD74ACT32M from Texas Instruments is pin-compatible with the MC74ACT32DR2G but is spec'd over the -55 °C to +125 °C military range, making it the drop-in choice for harsh-environment designs. AEC-Q100 qualified parts like the SN74ACT32DRQ1 are the path for automotive electronics; the MC74ACT32DR2G itself is not AEC-Q100 qualified per its datasheet.

Third, multi-source footprints. Sourcing risk in 2026 is concentrated in advanced-node semiconductors, not in mature 5 V logic. Even so, dual-sourcing the ACT32 footprint between onsemi and TI is cheap insurance: the SN74ACT32DR is functionally identical to the MC74ACT32DR2G per cross-reference data, and both share the SOIC-14 pinout. A BOM that lists both MPNs lets a buyer pivot between vendors on lead time or allocation without a PCB respin.

Pricing trends: the verified 2026-10-06 tier schedule runs $0.41 / $0.32 / $0.24 / $0.19 / $0.16 / $0.13 from qty 1 through qty 2,500. With 99,999 units of stock and active production across multiple vendors, expect this curve to remain stable for the next 24 months. Bulk pricing under $0.15 per unit at qty 2,500 is far below the equivalent bipolar 74LS32 in 2026 dollar terms when the 50% ICC reduction is factored in.

The fourth, quieter trend is the role of the ACT32 family as a bridge between legacy and modern designs. Industrial PLCs, factory automation controllers, and test instruments built on 5 V TTL still ship in volume, and modernization paths often replace bipolar 74LS32 / 74S32 / 74F32 with ACT32 on the same SOIC-14 footprint. The MC74ACT32DR2G fits that role directly: same pinout, lower power, same TTL-compatible thresholds. Watch for ongoing factory-automation refresh cycles in 2026-2028 to keep ACT32 demand firm.

Engineer takeaway: stock the 5 V MC74ACT32DR2G with the SN74ACT32DR as a second source, plan for industrial temperature via the CD74ACT32M, and switch to 74LVC32 only when the system rail drops below 3.3 V. For more on adjacent logic parts, see the CD74HC4511M96 BCD-to-7-segment decoder guide and the XAIPART blog for additional pillar articles.