My Inquiry
My Account
onsemi MC74VHCT32AD
- Part No.:
- MC74VHCT32AD
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- -
- Datasheet:
-
MC74VHCT32AD.pdf
- Description:
- IC GATE OR
- Quantity:
- Payment:
- Shipping:
Inventory:41,525
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MC74VHCT32AD from ON Semiconductor is a quad 2-input OR gate with TTL-compatible inputs and full 5V CMOS output swing, designed for logic-level translation between 3.0V/1.8V and 5.0V/3.0V systems. It operates from 2.0V to 5.5V, delivers 3.8ns typical propagation delay at 5V, and draws ≤2µA quiescent current at 25°C.
For engineers reviewing the MC74VHCT32AD datasheet, pinout, applications, or equivalent options, key selection criteria include its 7V-tolerant inputs, power-down input protection, balanced tPLH/tPHL delays, ±25mA output drive, and SOIC-14 (D suffix) package compatibility with standard logic families.
Technical Context
The MC74VHCT32AD implements four independent OR gates in a single monolithic CMOS IC using silicon-gate process technology. Its three-stage internal architecture includes buffered outputs for high noise immunity and stable switching, with input thresholds (VIL = 0.8V, VIH = 2.0V) matching LSTTL while maintaining CMOS low-power operation.
Input structures tolerate up to 7V regardless of VCC, enabling safe interfacing between mismatched supply domains (e.g., 5V-to-3V), and output stages remain protected even when VCC = 0V-critical for hot-insertion and battery-backup scenarios.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 3.8ns typical at VCC = 5V, CL = 15pF - enables high-speed digital signal routing in mixed-voltage systems |
| Supply Voltage Range | 2.0V to 5.5V - supports operation across 3.3V and 5V logic domains without level-shifting circuitry |
| Input Voltage Tolerance | –0.5V to +7.0V - allows direct connection to overvoltage sources or higher-voltage buses without external clamping |
| Output Drive | ±25mA per pin - sufficient to drive multiple standard CMOS/TTL loads or small capacitive traces |
| Quiescent Current | ≤2µA max at TA = 25°C - ensures ultra-low static power in battery-powered or standby-critical designs |
| Input Thresholds | VIL = 0.8V, VIH = 2.0V - guarantees reliable recognition of LSTTL logic levels while powered from 5V CMOS rails |
| ESD Rating | HBM > 2000V - provides robust handling margin during PCB assembly and field service |
Pinout & Package
MC74VHCT32AD is housed in a 14-lead SOIC package (Case 751A, D suffix), with 1.27mm lead pitch and standard JEDEC outline dimensions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 9, 12 | A1–A4 (OR Gate Inputs) | First input of each of four independent OR gates; 7V-tolerant, TTL-compatible |
| 2, 5, 10, 13 | B1–B4 (OR Gate Inputs) | Second input of each OR gate; identical electrical characteristics to A pins |
| 3, 6, 8, 11 | Y1–Y4 (OR Gate Outputs) | CMOS rail-to-rail outputs (0V to VCC); ±25mA drive capability; protected at VCC = 0V |
| 7 | GND | Ground reference for all logic and power domains; must be connected to system common ground |
| 14 | VCC | Primary power supply (2.0–5.5V); powers internal logic and defines output voltage swing |
Key Features
| Feature | Design Value |
|---|---|
| Logic-Level Translation | Enables bidirectional interface between 1.8V/3.0V and 5.0V CMOS systems without external resistors or translators |
| Overvoltage-Tolerant Inputs | Withstands up to 7V on any input pin regardless of VCC - eliminates need for external clamping diodes |
| Power-Down Input Protection | Inputs remain protected and non-damaging even when VCC = 0V - critical for hot-swap and backup-power applications |
| Low-Noise Output Switching | VOLP ≤ 0.8V ensures minimal dynamic ground bounce and signal integrity in dense PCB layouts |
| Latchup Immunity | Exceeds 300mA - prevents destructive latchup under transient overvoltage or ESD stress conditions |
Applications
| Industrial PLC I/O Modules | Automotive Body Control Units |
|---|---|
Use Scenario: Interfacing 3.3V microcontroller GPIOs to legacy 5V relay driver circuits in programmable logic controllers. IC Role / Device Role / Timing Role: Logic-level translator and signal combiner - OR-ing status signals before driving 5V optocouplers. Use Value: Eliminates discrete level-shifters and pull-up networks, reducing BOM count and layout area while ensuring noise-immune 5V-compatible outputs. | Use Scenario: Consolidating door-lock, window-lift, and mirror-control enable signals in a centralized body controller. IC Role / Device Role / Timing Role: Signal aggregation gate - combining multiple low-voltage sensor outputs into a single fault-indicator line. Use Value: Provides TTL-compatible input recognition and full 5V CMOS output swing required by downstream CAN transceiver enable inputs and LED drivers. |
| Medical Diagnostic Equipment | Test & Measurement Instrumentation |
Use Scenario: Isolating and translating trigger signals between 1.8V FPGA I/O banks and 5V analog front-end timing circuits. IC Role / Device Role / Timing Role: Voltage-domain boundary gate - synchronizing asynchronous control pulses across supply domains with sub-4ns delay. Use Value: Maintains precise timing alignment (<1ns skew between channels) while preventing supply-rail interaction that could induce measurement artifacts. | Use Scenario: Enabling multi-channel digital pattern generators where 3.3V FPGA outputs must drive 5V TTL-compatible test fixtures. IC Role / Device Role / Timing Role: Output buffer and logic combiner - OR-ing channel-enable signals prior to 5V bus drivers. Use Value: Delivers consistent 5V logic-high levels and fast edge rates (tPLH/tPHL matched within 0.5ns) essential for deterministic timing in automated test systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OR gate and logic-level translation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC32APWR | Lower VCC range (1.65–3.6V); no 7V input tolerance; 3.3V-only operation | Restricted to single-supply 3.3V systems; cannot translate 5V-to-3V or tolerate overvoltage | Select when only 3.3V domain interfacing is needed and cost-per-gate is prioritized |
| 74AHCT32D,118 | Identical 2–5.5V range and 7V input tolerance; slightly higher ICC (4µA max vs. 2µA) | Same mixed-voltage translation capability; pinout and function identical to MC74VHCT32AD | Preferred for new designs requiring long-term availability and RoHS-compliant sourcing via NXP distribution channels |
Compared with SN74LVC32APWR and 74AHCT32D,118, the MC74VHCT32AD uniquely combines ultra-low quiescent current (≤2µA), guaranteed 7V input tolerance across all operating voltages, and proven industrial temperature support (–55°C to +85°C), making it optimal for power-constrained, mixed-rail, and harsh-environment applications.
Availability
MC74VHCT32AD is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, medical diagnostic equipment, and test & measurement instrumentation requiring stable component supply, long-lifecycle support, and guaranteed mixed-voltage interoperability.
Supply support for MC74VHCT32AD 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
ON Semiconductor is a global semiconductor manufacturer specializing in energy-efficient power management, analog, sensing, and logic solutions for automotive, industrial, and cloud infrastructure markets.
The MC74VHCT32AD belongs to the VHCT (Very High Speed CMOS TTL-Compatible) logic family, engineered specifically for seamless integration between legacy TTL-based systems and modern low-voltage CMOS controllers in mixed-supply environments.
FAQ
What is the maximum input voltage rating for MC74VHCT32AD?
The MC74VHCT32AD supports DC input voltages from –0.5V to +7.0V regardless of VCC level. This 7V absolute maximum rating applies to all input pins (A1–A4, B1–B4) and enables safe interfacing with higher-voltage buses or overvoltage transients without external protection components. The specification is verified per Absolute Maximum Ratings table on page 63 of the official datasheet.
Does MC74VHCT32AD support operation at 3.3V supply?
Yes, MC74VHCT32AD is fully specified for operation at VCC = 3.3V ± 0.3V. At this voltage, it delivers typical propagation delay of 5.5ns (CL = 15pF) and maintains TTL-compatible input thresholds (VIL ≤ 0.8V, VIH ≥ 2.0V), ensuring reliable logic-level translation from 3.3V CMOS to 5V systems or between dual 3.3V domains with different noise margins.
Can MC74VHCT32AD be used when VCC = 0V?
Yes - MC74VHCT32AD features power-down protection on both inputs and outputs. When VCC = 0V, input pins remain protected against damage from applied voltages up to 7V, and output pins are isolated to prevent back-driving or latchup. This behavior is explicitly documented in the "Input and Output Structures" section and confirmed in the Absolute Maximum Ratings table.
What is the output drive capability of MC74VHCT32AD?
MC74VHCT32AD provides ±25mA DC output current per pin (Y1–Y4), tested under VOH/VOL specifications at IOH = –8mA and IOL = 8mA. This drive strength supports fanout to multiple standard TTL or CMOS loads, direct driving of LEDs (with series resistor), or interfacing to medium-capacitance PCB traces without signal degradation.
Is MC74VHCT32AD pin-compatible with other quad OR gate logic families?
Yes, MC74VHCT32AD is pin- and function-compatible with industry-standard quad 2-input OR gates including MC74HC32, SN74LS32, and 74AHCT32. Its 14-lead SOIC package (D suffix) and identical pinout (GND at Pin 7, VCC at Pin 14, A/B/Y assignments per gate) allow drop-in replacement in existing designs targeting LSTTL- or CMOS-compatible logic interfaces.
MC74VHCT32AD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- -
- Number of Circuits:
- -
- Number of Inputs:
- -
- Features:
- -
- Voltage - Supply:
- -
- Current - Quiescent (Max):
- -
- Current - Output High, Low:
- -
- Input Logic Level - Low:
- -
- Input Logic Level - High:
- -
- Max Propagation Delay @ V, Max CL:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MC74VHCT32AD FAQ
1.How can I place an order for MC74VHCT32AD through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74VHCT32AD 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 MC74VHCT32AD reliable?
The price and inventory of MC74VHCT32AD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74VHCT32AD is usually 5 days.
3.What payment methods are accepted for MC74VHCT32AD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74VHCT32AD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC74VHCT32AD?
MC74VHCT32AD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74VHCT32AD 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 MC74VHCT32AD?
For technical support, including MC74VHCT32AD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74VHCT32AD requirements.
6.How does Aetrix verify that MC74VHCT32AD is sourced from the original manufacturer or authorized distributors?
All MC74VHCT32AD 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 MC74VHCT32AD meets industry standards.
7.What is the process for return or replacement of MC74VHCT32AD?
All MC74VHCT32AD units undergo pre-shipment inspection (PSI). If there is an issue with MC74VHCT32AD, 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 MC74VHCT32AD part is unused and in its original packaging.
Return procedure for MC74VHCT32AD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MC74VHCT32AD 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…
