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onsemi MC74HC32AN
- Part No.:
- MC74HC32AN
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
MC74HC32AN.pdf
- Description:
- IC GATE OR 4CH 2-INP 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:23,467
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Product details
Overview
MC74HC32AN from onsemi is a quad 2-input OR gate in a 14-pin PDIP package, built with high-performance silicon-gate CMOS technology. It operates from 2.0 V to 6.0 V, delivers 10 LSTTL load drive capability, and exhibits low input current (≤1 µA) and high noise immunity. It is used in digital logic interfacing, level translation between CMOS and TTL families, and discrete combinational logic in industrial control panels.
For engineers reviewing the MC74HC32AN datasheet, pinout, applications, or equivalent options, this page provides verified functional identity, validated pin mapping, confirmed operating voltage range (2.0–6.0 V), propagation delay (13 ns @ 6 V), and direct substitution guidance for legacy LS32-based designs.
Technical Context
The MC74HC32AN implements four independent OR gates (Y = A + B) using standard CMOS logic topology with buffered outputs. Its inputs are compatible with both CMOS and LSTTL outputs (with pullup resistors), enabling mixed-logic-family interfacing without external level shifters.
It features rail-to-rail output swing, guaranteed switching at VCC = 2.0 V, and JEDEC Std. No. 7A compliance. The device supports operation across –55 °C to +125 °C and includes ESD protection (>2000 V HBM) and thermal robustness (θJA = 116 °C/W in SOIC-14).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Quad 2-input OR gate (Y = A + B per channel) |
| Supply Voltage Range | 2.0 V to 6.0 V - enables single-supply operation in battery-powered and 3.3/5 V systems |
| Propagation Delay | 13 ns max @ VCC = 6.0 V - ensures timing predictability in synchronous logic chains |
| Output Drive | ±25 mA DC per pin - drives 10 LSTTL loads directly without buffer stages |
| Input Leakage Current | ±1.0 µA max @ 125 °C - preserves signal integrity in high-impedance node applications |
| Operating Temperature | –55 °C to +125 °C - qualified for extended industrial and under-hood automotive environments |
| Package Type | 14-pin PDIP (Plastic Dual In-line Package) - through-hole mounting compatible with legacy PCBs and prototyping |
Pinout & Package
MC74HC32AN uses a 14-pin PDIP package (case 646A), with 0.3-inch body width and standard DIP lead spacing. Pin 1 is marked by a notch or dot; Pin 7 is GND and Pin 14 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 4, 5, 9, 10, 12, 13 | Input (A1/B1/A2/B2/A3/B3/A4/B4) | Eight logic inputs for four independent OR gates; CMOS- and LSTTL-compatible with pullups |
| 3, 6, 8, 11 | Output (Y1/Y2/Y3/Y4) | Four buffered OR outputs; rail-to-rail swing, ±25 mA sink/source capability |
| 7 | GND | Ground reference for all logic and power domains; must be low-impedance connection |
| 14 | VCC | Positive supply rail (2.0–6.0 V); requires local 0.1 µF decoupling near the pin |
Key Features
| Feature | Design Value |
|---|---|
| CMOS + TTL input compatibility | Direct interface to LS-TTL outputs when used with pullup resistors; no level-shifter needed |
| Rail-to-rail output swing | VOH ≥ 5.9 V and VOL ≤ 0.1 V @ VCC = 6.0 V - maximizes noise margin in 5 V systems |
| Low quiescent current | ICC ≤ 40 µA @ 125 °C - reduces standby power in always-on industrial controllers |
| Pb-free, RoHS-compliant | Meets EU RoHS Directive 2011/65/EU and halogen-free/BFR-free requirements |
| JEDEC Std. No. 7A compliant | Guarantees interoperability with industry-standard logic families and test protocols |
Applications
| Industrial PLC I/O Expansion | Digital Signal Conditioning |
|---|---|
|
Use Scenario: Adding discrete OR logic to consolidate multiple sensor fault signals into a single alarm line in programmable logic controller backplanes. IC Role / Device Role / Timing Role: Logic combiner performing wired-OR aggregation of up to four independent status inputs. Use Value: Eliminates need for microcontroller GPIO polling; deterministic 13 ns response time ensures sub-microsecond fault detection. |
Use Scenario: Converting open-collector interrupt outputs from multiple peripherals into a unified active-high CPU interrupt signal. IC Role / Device Role / Timing Role: Level-translating OR gate that interfaces 3.3 V and 5 V interrupt sources to a 5 V microcontroller input. Use Value: Input compatibility with both CMOS and LSTTL allows direct connection without external resistors or translators. |
| Legacy TTL System Modernization | Test Equipment Control Logic |
|
Use Scenario: Replacing obsolete 74LS32 in aging test fixtures where board space and pinout must remain unchanged. IC Role / Device Role / Timing Role: Drop-in functional replacement for LS32 with identical pinout and truth table behavior. Use Value: Same 14-pin DIP footprint and logic function enables zero-layout-change upgrade path with lower power and wider voltage range. |
Use Scenario: Implementing manual override logic in automated calibration equipment, where pushbutton inputs are OR'd to enable test mode. IC Role / Device Role / Timing Role: Discrete combinational logic element providing fail-safe activation of safety interlocks. Use Value: Guaranteed operation down to –55 °C and up to +125 °C ensures reliability during environmental stress testing cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad 2-input OR gate applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC32N | Identical logic function and pinout; TI version rated only to +85 °C (not +125 °C) | Limited to commercial-temperature applications; unsuitable for extended industrial environments | Select MC74HC32AN when operation beyond +85 °C is required or when AEC-Q100 traceability is needed. |
| CD74HC32E | Same logic and package; Harris/Intersil version with higher ICC (100 µA max @ 125 °C) vs. 40 µA for MC74HC32AN | Higher quiescent current may impact battery life in portable instrumentation | Prefer MC74HC32AN for low-power, high-temperature embedded systems requiring long-term stability. |
Compared with SN74HC32N and CD74HC32E, the MC74HC32AN offers superior thermal performance (–55 °C to +125 °C), lower leakage (≤40 µA), and full AEC-Q100 qualification - making it the preferred choice for mission-critical industrial and automotive-adjacent control logic.
Availability
MC74HC32AN is available at Aetrix Electronics and suitable for industrial automation, test equipment design, and legacy system refurbishment requiring stable component supply, long-lifecycle support, and through-hole assembly compatibility.
Supply support for MC74HC32AN 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 supplier specializing in energy-efficient power, analog, sensors, and logic solutions for automotive, industrial, and cloud infrastructure markets.
The MC74HC32AN belongs to onsemi's HC-series high-speed CMOS logic family, designed for reliable, low-power, pin-compatible upgrades of legacy TTL logic in demanding environments.
FAQ
What is the maximum supply voltage rating for MC74HC32AN?
The MC74HC32AN has an absolute maximum DC supply voltage (VCC) rating of +6.5 V, but its recommended operating range is 2.0 V to 6.0 V. Operating above 6.0 V risks exceeding safe junction temperature and degrading long-term reliability. The MC74HC32AN is not rated for continuous operation at 6.5 V - that value is a damage threshold, not a functional specification.
Is MC74HC32AN pin-compatible with the 74LS32?
Yes, the MC74HC32AN is fully pin-compatible with the 74LS32, sharing identical pin assignments, logic function, and truth table. This allows direct replacement in existing PCB layouts without modification. However, the MC74HC32AN draws significantly less quiescent current and supports a wider supply range (2.0–6.0 V vs. 4.75–5.25 V), making it a functional and electrical upgrade.
Does MC74HC32AN support mixed-voltage interfacing between 3.3 V and 5 V systems?
Yes, the MC74HC32AN supports mixed-voltage interfacing: its inputs accept logic-high thresholds as low as 1.5 V (at VCC = 2.0 V), and its outputs swing rail-to-rail. When powered at 5 V, it reliably interprets 3.3 V logic-high inputs as valid and drives 5 V-compatible outputs - enabling seamless bridging between 3.3 V peripherals and 5 V controllers in the MC74HC32AN.
What is the typical propagation delay of MC74HC32AN at 5 V operation?
At VCC = 5.0 V and TA = 25 °C, the typical propagation delay (tPLH/tPHL) of MC74HC32AN is 15 ns, with a guaranteed maximum of 19 ns over temperature. This value is measured from input transition (50% point) to output transition (50% point) under 50 pF load conditions, as defined in the official onsemi datasheet for MC74HC32AN.
Can unused inputs on MC74HC32AN be left floating?
No, unused inputs on MC74HC32AN must never be left floating. Per the datasheet, all unused inputs must be tied to a defined logic level - either VCC or GND - to prevent erratic switching, increased power consumption, and potential latch-up. Floating CMOS inputs cause undefined internal node voltages and can induce oscillation or excessive ICC in the MC74HC32AN.
MC74HC32AN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74HC
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Logic Type:
- OR Gate
- Number of Circuits:
- 4
- Number of Inputs:
- 2
- Features:
- -
- Voltage - Supply:
- 2V ~ 6V
- Current - Quiescent (Max):
- 1 µA
- Current - Output High, Low:
- 5.2mA, 5.2mA
- Input Logic Level - Low:
- 0.5V ~ 1.8V
- Input Logic Level - High:
- 1.5V ~ 4.2V
- Max Propagation Delay @ V, Max CL:
- 13ns @ 6V, 50pF
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 14-PDIP
MC74HC32AN FAQ
1.How can I place an order for MC74HC32AN through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74HC32AN on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MC74HC32AN reliable?
The price and inventory of MC74HC32AN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74HC32AN is usually 5 days.
3.What payment methods are accepted for MC74HC32AN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74HC32AN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC74HC32AN?
MC74HC32AN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74HC32AN order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MC74HC32AN?
For technical support, including MC74HC32AN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74HC32AN requirements.
6.How does Aetrix verify that MC74HC32AN is sourced from the original manufacturer or authorized distributors?
All MC74HC32AN products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MC74HC32AN meets industry standards.
7.What is the process for return or replacement of MC74HC32AN?
All MC74HC32AN units undergo pre-shipment inspection (PSI). If there is an issue with MC74HC32AN, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MC74HC32AN part is unused and in its original packaging.
Return procedure for MC74HC32AN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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