My Inquiry
My Account
onsemi MC74HC32AFR1
- Part No.:
- MC74HC32AFR1
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- 14-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
MC74HC32AFR1.pdf
- Description:
- IC GATE OR 4CH 2-INP 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:36,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MC74HC32AFR1 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, and supports industrial temperature range (–55 °C to +125 °C). Used in digital logic interfacing, level translation, and discrete gate-based control circuits.
For engineers reviewing the MC74HC32AFR1 datasheet, pinout, applications, or equivalent options, key selection criteria include supply voltage range, propagation delay at 5 V (15 ns max), output drive strength (10 LSTTL loads), and TSSOP-14 package compatibility with space-constrained PCB layouts.
Technical Context
The MC74HC32AFR1 implements four independent OR logic functions (Y = A + B) using CMOS transistor pairs, with inputs compatible with both standard CMOS and LSTTL outputs when pullup resistors are used. Its design ensures high noise immunity and low static current consumption.
It meets JEDEC Std No. 7A requirements and features 48 FETs (12 equivalent gates) per device. Input leakage is ≤±1.0 µA at 6.0 V, and output transition times are specified down to 13 ns at VCC = 6.0 V with CL = 50 pF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Quad 2-input OR gate (Y = A + B), fully independent channels |
| Supply Voltage Range | 2.0 V to 6.0 V - enables direct interface with 3.3 V and 5 V systems without level shifters |
| Max Propagation Delay | 15 ns at VCC = 4.5 V - supports >30 MHz toggle rates in synchronous logic paths |
| Output Drive | ±25 mA per pin - drives up to 10 LSTTL loads or fan-out into multiple CMOS/NMOS inputs |
| Input Leakage Current | ≤±1.0 µA at 6.0 V - minimizes power loss in battery-backed or ultra-low-power hold states |
| Operating Temperature | –55 °C to +125 °C - qualified for under-hood automotive and industrial control environments |
| ESD Protection | Human Body Model ≥2 kV - built-in protection avoids external clamping in typical board-level handling |
Pinout & Package
TSSOP-14 surface-mount package (Case 948G, DT suffix), 4.9 mm × 4.4 mm footprint, 0.65 mm pitch, lead-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 4, 5, 9, 10, 12, 13 | Input A1/B1, A2/B2, A3/B3, A4/B4 | Dedicated OR gate inputs; CMOS- and LSTTL-compatible with pullup support |
| 3, 6, 8, 11 | Output Y1/Y2/Y3/Y4 | Push-pull CMOS outputs; capable of sourcing/sinking 25 mA each |
| 7 | GND | Ground reference for all logic and power domains; must be low-impedance |
| 14 | VCC | Positive supply rail; bypassing with 0.1 µF ceramic capacitor required near pin |
Key Features
| Feature | Design Value |
|---|---|
| Pinout compatibility with 74LS32 | Enables drop-in replacement in legacy TTL designs without PCB rework |
| High noise immunity | CMOS input threshold ratios (VIH/VIL) ensure robust operation in electrically noisy industrial environments |
| Low quiescent ICC | ≤40 µA at 6.0 V and 125 °C - critical for always-on monitoring subsystems |
| AEC-Q100 qualified variant available | NLV prefix versions meet automotive qualification for engine control and body electronics |
| Pb-free, Halogen-free, RoHS compliant | Meets global environmental compliance mandates without derating or reliability trade-offs |
Applications
| Industrial PLC I/O Expansion | Automotive Body Control Module |
|---|---|
Use Scenario: Adding discrete OR logic to combine multiple sensor fault signals before feeding into a microcontroller interrupt line. IC Role / Device Role / Timing Role: Logic combiner for asynchronous fault aggregation; no timing-critical path, but must tolerate wide temperature swings. Use Value: Eliminates need for firmware polling by hardware OR-ing of door-open, hood-open, and trunk-open signals - reduces MCU wake cycles and latency. | Use Scenario: Interfacing legacy 5 V switch inputs (e.g., seatbelt buckle, ignition key sense) with 3.3 V microcontroller GPIOs. IC Role / Device Role / Timing Role: Level-translating logic buffer; operates across full automotive temperature range with stable VIH/VIL thresholds. Use Value: Enables direct connection without external resistive dividers or dedicated level translators - saves board area and BOM cost. |
| Medical Device Power Sequencing | Test Equipment Signal Conditioning |
Use Scenario: Enabling power rails only when multiple safety interlocks (cover closed, emergency stop released) are simultaneously satisfied. IC Role / Device Role / Timing Role: Safety-critical combinational logic element in redundant enable path; requires guaranteed propagation delay and latch-up immunity. Use Value: Provides deterministic, fail-safe OR behavior with <15 ns delay at 5 V - supports tight sequencing windows in multi-rail power supplies. | Use Scenario: Glitch suppression and signal arbitration in benchtop instrument front-ends where multiple trigger sources feed one acquisition channel. IC Role / Device Role / Timing Role: Digital signal combiner with fast edge response and low input capacitance (10 pF max). Use Value: Reduces jitter accumulation in trigger paths due to sub-20 ns propagation matching across all four gates - improves measurement repeatability. |
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 |
|---|---|---|---|
| SN74HC32DR | Same logic function and DC specs; slightly higher max tPLH (19 ns @ 4.5 V); SOIC-14 only | Lacks TSSOP-14 option; not AEC-Q100 qualified | Select when SOIC-14 footprint is preferred and automotive qualification is unnecessary |
| 74VHC32M | Higher speed (tPLH = 7.5 ns @ 5 V); lower ICC (≤2 µA); same pinout; different manufacturer (ON Semiconductor vs. Diodes Inc.) | Not rated for –55 °C operation; max TA = +105 °C only | Select when sub-10 ns propagation is required and extended temperature range is not needed |
Compared with SN74HC32DR and 74VHC32M, the MC74HC32AFR1 uniquely balances industrial temperature range, TSSOP-14 compactness, and AEC-Q100-qualified variants - making it optimal for space- and reliability-constrained embedded control nodes.
Availability
MC74HC32AFR1 is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and medical device power sequencing requiring stable component supply and long-term lifecycle assurance.
Supply support for MC74HC32AFR1 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 focused on energy-efficient electronics, delivering silicon solutions for automotive, industrial, cloud, and IoT applications.
The MC74HC32AFR1 belongs to the 74HC logic family, designed for high-speed, low-power CMOS logic interfacing in mixed-voltage systems - emphasizing compatibility, reliability, and broad operating margins.
FAQ
What is the maximum supply voltage rating for MC74HC32AFR1?
The MC74HC32AFR1 has an absolute maximum DC supply voltage (VCC) rating of +7.0 V referenced to GND. However, its recommended operating range is 2.0 V to 6.0 V. Operation above 6.0 V may cause accelerated aging or parametric shift, and is not guaranteed per specification. Always observe the 6.0 V upper limit in functional designs to ensure long-term reliability and compliance with JEDEC Std No. 7A.
Is MC74HC32AFR1 pin-compatible with the 74LS32 TTL device?
Yes, the MC74HC32AFR1 is explicitly designed to be pinout-identical to the 74LS32. All 14 pins map directly: inputs A1–B4, outputs Y1–Y4, VCC, and GND occupy identical positions. This allows direct substitution in existing LS32-based PCBs, provided appropriate pullup resistors are used for LSTTL input compatibility and supply voltage is adjusted to the CMOS range (2.0–6.0 V).
Does MC74HC32AFR1 support operation at –55 °C?
Yes, the MC74HC32AFR1 is fully specified for operation 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 Recommended Operating Conditions table and makes MC74HC32AFR1 suitable for aerospace, military, and under-hood automotive applications where thermal extremes are expected.
What is the input capacitance of MC74HC32AFR1, and why does it matter?
The MC74HC32AFR1 has a maximum input capacitance (Cin) of 10 pF per input pin. This low value minimizes loading on upstream drivers - especially important in high-frequency or high-fanout configurations - and helps maintain signal integrity by reducing RC delays and reflections. At 10 pF, the device imposes negligible capacitive load on microcontroller GPIOs or other logic buffers driving it.
Can unused inputs on MC74HC32AFR1 be left floating?
No, unused inputs on MC74HC32AFR1 must never be left floating. They must be tied to a valid logic level - either VCC or GND - using a pullup or pulldown resistor. Floating CMOS inputs can drift into the linear region, causing excessive supply current, localized heating, and potential oscillation or erratic output behavior. The datasheet explicitly mandates this practice to ensure stable, low-power operation and prevent device malfunction.
MC74HC32AFR1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74HC
- Package/Case:
- 14-SOIC (0.209", 5.30mm Width)
- Packaging:
- Bulk
- 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:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
MC74HC32AFR1 FAQ
1.How can I place an order for MC74HC32AFR1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74HC32AFR1 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 MC74HC32AFR1 reliable?
The price and inventory of MC74HC32AFR1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74HC32AFR1 is usually 5 days.
3.What payment methods are accepted for MC74HC32AFR1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74HC32AFR1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC74HC32AFR1?
MC74HC32AFR1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74HC32AFR1 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 MC74HC32AFR1?
For technical support, including MC74HC32AFR1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74HC32AFR1 requirements.
6.How does Aetrix verify that MC74HC32AFR1 is sourced from the original manufacturer or authorized distributors?
All MC74HC32AFR1 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 MC74HC32AFR1 meets industry standards.
7.What is the process for return or replacement of MC74HC32AFR1?
All MC74HC32AFR1 units undergo pre-shipment inspection (PSI). If there is an issue with MC74HC32AFR1, 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 MC74HC32AFR1 part is unused and in its original packaging.
Return procedure for MC74HC32AFR1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MC74HC32AFR1 Tags
-
SN74LVC1G14DBVR
Texas Instruments
-
SN74LVC1G14DCKR
Texas Instruments
-
SN74AHC1G14DBVR
Texas Instruments
-
SN74LVC1G08DBVR
Texas Instruments
-
SN74LVC1G08DCKR
Texas Instruments
-
SN74LVC1G32DCKR
Texas Instruments
-
SN74LVC1G04DBVR
Texas Instruments
.jpg)
-
74LVC1G08GW,125
Nexperia USA Inc.
-
SN74LVC1G04DCKR
Texas Instruments
-
SN74AHC1G08DBVR
Texas Instruments
-
SN74LVC1G32DBVR
Texas Instruments
-
SN74AHCT1G08DBVR
Texas Instruments
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
