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Home > Products > Integrated Circuits (ICs) > Logic > Gates and Inverters

STMicroelectronics 74VHCT32AMTR

Name: 74VHCT32AMTR
Brand: STMicroelectronics
SKU: 74VHCT32AMTR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74VHCT32AMTR

Manufacturer:: STMicroelectronics

Category:: Gates and Inverters

Package:: 14-SOIC (0.154", 3.90mm Width)

Datasheet:: 74VHCT32AMTR.pdf

Description:: IC GATE OR 4CH 2-INP 14SO

Quantity:: RFQ Add To RFQ list

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Inventory:4,606

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Product details

Overview

74VHCT32AMTR from STMicroelectronics is a quad 2-input OR gate in high-speed CMOS technology, operating at 4.5–5.5 V with 5 ns typical propagation delay, ±8 mA symmetrical output drive, and TTL-compatible input thresholds (VIH ≥ 2 V, VIL ≤ 0.8 V). It enables logic-level translation between 5 V and 3 V systems in industrial control and embedded interface circuits.

For engineers reviewing the 74VHCT32AMTR datasheet, 74VHCT32AMTR pinout, 74VHCT32AMTR application, or 74VHCT32AMTR equivalent, key selection criteria include propagation delay matching, input voltage tolerance up to 7 V, power-down protection on all I/Os, ESD immunity (2 kV), and SO-14 tape-and-reel packaging for automated assembly.

Technical Context

The device implements four independent OR gates using sub-micron C2MOS process with three-stage buffered output architecture, delivering high noise immunity and stable switching. Input circuitry accepts 0–7 V regardless of VCC, enabling robust hot-swap and mixed-voltage interfacing.

All inputs and outputs feature diode-based ESD protection and power-down isolation, allowing safe operation during partial power-down states. Propagation delays are balanced (tPLH ≅ tPHL) and specified under 15 pF and 50 pF load conditions across -55°C to +125°C.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	4.5 V to 5.5 V - Ensures compatibility with standard 5 V TTL/CMOS rails and tolerates supply ripple.
t_PD (Typ.)	5 ns at V_CC = 5 V, C_L = 15 pF - Supports >100 MHz toggle rates in combinatorial logic paths.
I_OH/I_OL	±8 mA min - Drives standard TTL loads or multiple 74-series inputs without external buffering.
V_IH/V_IL	2.0 V min / 0.8 V max - Guarantees reliable recognition of TTL output levels at 5 V supply.
Input Voltage Range	-0.5 V to +7.0 V - Permits direct connection to 3 V, 5 V, or overvoltage-tolerant signals without level shifters.
ESD Immunity	2 kV HBM - Meets IEC 61000-4-2 Level 2 for board-level transient robustness.

Pinout & Package

74VHCT32AMTR is housed in a 14-pin SOIC (Small Outline Integrated Circuit) package with tape-and-reel delivery (MTR suffix), compliant with JEDEC MS-012 and RoHS requirements. Body dimensions: 8.75 mm × 3.91 mm × 1.75 mm (L × W × H).

Pin/Terminal	Circuit Role	Design Meaning
1, 4, 9, 12	1A–4A Inputs	First operand inputs for each of four OR gates; tolerate 0–7 V independent of V_CC.
2, 5, 10, 13	1B–4B Inputs	Second operand inputs; identical electrical specs and protection as A inputs.
3, 6, 8, 11	1Y–4Y Outputs	OR results; actively driven high/low with symmetrical impedance and power-down isolation.
7	GND	Reference ground terminal; decoupling capacitor placement critical for noise suppression.
14	V_CC	Positive supply; must be bypassed locally with 100 nF ceramic capacitor near pin.

Key Features

Feature	Design Value
Power-down protection	All inputs and outputs remain high-impedance and non-destructive when V_CC = 0 V.
TTL-compatible thresholds	VIH ≥ 2.0 V and VIL ≤ 0.8 V enable direct interconnection with legacy 74LS/74F devices.
Balanced propagation delays	tPLH ≅ tPHL minimizes duty-cycle distortion in clocked OR-based gating applications.
Low quiescent current	I_CC = 2 µA max at 25°C supports battery-backed or low-power standby modes.

Applications

Industrial PLC I/O Expansion

Automotive Body Control Module

Use Scenario: Aggregating multiple sensor fault flags into a single OR'd warning signal before transmission to MCU.

IC Role / Device Role / Timing Role: Combinatorial logic gate performing real-time logical OR of up to four independent digital inputs.

Use Value: Eliminates need for software polling or additional MCU GPIO pins; operates reliably across -40°C to +125°C ambient.

Use Scenario: Combining door-open, trunk-open, and hood-open signals to trigger interior lighting activation.

IC Role / Device Role / Timing Role: Level-sensitive OR function with no internal storage; zero-latency response to any input assertion.

Use Value: Tolerates 12 V system transients via 7 V input rating; immune to ESD events during service access.

Medical Equipment Status Monitoring

Test & Measurement Signal Gating

Use Scenario: OR-ing multiple safety interlock signals (e.g., cover closed, emergency stop released) to enable power-on sequence.

IC Role / Device Role / Timing Role: Fail-safe combinational logic element ensuring immediate output assertion upon any input high.

Use Value: Guaranteed 5 ns max delay ensures deterministic timing in safety-critical enable paths per IEC 62304.

Use Scenario: Enabling analog multiplexer channels only when both test mode and valid trigger conditions are met.

IC Role / Device Role / Timing Role: Synchronous gating logic with matched tPLH/tPHL preserving pulse integrity.

Use Value: Symmetrical 8 mA drive sustains signal integrity into 50 Ω scope inputs or FPGA I/O banks.

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
SN74VHC32DR	Higher V_CC range (2–5.5 V); lower I_OH/I_OL (±8 mA typ., not min); no 7 V input tolerance.	Suitable for 3.3 V–5 V dual-rail systems but lacks overvoltage-safe inputs for legacy interface.	Select when operating exclusively at 3.3 V or requiring wider supply flexibility below 4.5 V.
74LCX32MTCX	5 V tolerant inputs only up to V_CC + 0.5 V; higher ICC (10 µA typ.); no power-down protection.	Requires strict 5 V supply regulation; unsuitable for hot-swap or partial-power scenarios.	Prefer where cost is primary constraint and system-level overvoltage protection is already implemented.

Compared with SN74VHC32DR and 74LCX32MTCX, the 74VHCT32AMTR uniquely combines 7 V input tolerance, guaranteed ±8 mA drive, and full power-down protection-making it optimal for mixed-voltage industrial interfaces where reliability under supply fault conditions is mandatory.

Availability

74VHCT32AMTR is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, medical equipment status monitoring, and test & measurement signal gating requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74VHCT32AMTR 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power ICs, sensors, and discrete components for industrial, automotive, and consumer markets.

The 74VHCT series targets high-speed, low-power 5 V logic interoperability-specifically engineered to replace legacy 74LS devices while adding overvoltage tolerance, ESD hardening, and power-down safety for modern embedded control systems.

FAQ

Can 74VHCT32AMTR operate with a 3.3 V supply?

No. The 74VHCT32AMTR is specified only for 4.5–5.5 V operation per Table 5. Its TTL-compatible input thresholds (VIH ≥ 2 V) and output drive strength assume 5 V VCC. Using 3.3 V violates recommended operating conditions and may cause marginal VIH/VIL margins or reduced noise immunity.

Does this device support hot insertion?

Yes. All inputs accept -0.5 V to +7.0 V regardless of VCC state, and power-down protection isolates I/Os when VCC = 0 V. This allows safe insertion into live backplanes or powered systems, provided current-limiting resistors are used per STMicroelectronics AN2015 guidelines.

What is the maximum capacitive load this OR gate can drive?

The AC specifications are characterized up to 50 pF (Table 7). Driving >50 pF increases propagation delay nonlinearly and may cause ringing; for loads exceeding 50 pF, add a series resistor (22–47 Ω) near the output to dampen reflections and maintain signal integrity.

Is there a lead-free version of this part?

Yes. 74VHCT32AMTR is RoHS-compliant and manufactured with lead-free terminations per STMicroelectronics specification. The "MTR" suffix denotes tape-and-reel packaging with matte tin (Sn) plating, qualified for Pb-free reflow profiles (J-STD-020, peak 260°C).

74VHCT32AMTR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: 74VHCT

Package/Case:: 14-SOIC (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Logic Type:: OR Gate

Number of Circuits:: 4

Number of Inputs:: 2

Features:: -

Voltage - Supply:: 4.5V ~ 5.5V

Current - Quiescent (Max):: 2 µA

Current - Output High, Low:: 8mA, 8mA

Input Logic Level - Low:: 0.8V

Input Logic Level - High:: 2V

Max Propagation Delay @ V, Max CL:: 8ns @ 5V, 50pF

Operating Temperature:: -55°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-SO

74VHCT32AMTR FAQ

1.How can I place an order for 74VHCT32AMTR through Aetrix?

Please submit a Request for Quotation (RFQ) for 74VHCT32AMTR 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 74VHCT32AMTR reliable?

The price and inventory of 74VHCT32AMTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74VHCT32AMTR is usually 5 days.

3.What payment methods are accepted for 74VHCT32AMTR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74VHCT32AMTR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74VHCT32AMTR?

74VHCT32AMTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74VHCT32AMTR 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 74VHCT32AMTR?

For technical support, including 74VHCT32AMTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74VHCT32AMTR requirements.

6.How does Aetrix verify that 74VHCT32AMTR is sourced from the original manufacturer or authorized distributors?

All 74VHCT32AMTR 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 74VHCT32AMTR meets industry standards.

7.What is the process for return or replacement of 74VHCT32AMTR?

All 74VHCT32AMTR units undergo pre-shipment inspection (PSI). If there is an issue with 74VHCT32AMTR, 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 74VHCT32AMTR part is unused and in its original packaging.

Return procedure for 74VHCT32AMTR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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