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onsemi MC74ACT32DT
- Part No.:
- MC74ACT32DT
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MC74ACT32DT.pdf
- Description:
- IC GATE OR 4CH 2-INP 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:10,550
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Product details
Overview
MC74ACT32DT from onsemi is a quad 2-input OR gate IC with TTL-compatible inputs, operating at 4.5–5.5 V supply, delivering ±24 mA output drive, and featuring 1.0–10.0 ns propagation delay (CL = 50 pF) for high-speed digital logic interfacing in industrial control systems.
For engineers reviewing the MC74ACT32DT datasheet, pinout, applications, or equivalent options, key selection criteria include its 5 V TTL-compatible input thresholds, TSSOP-14 package footprint, guaranteed 24 mA sink/source capability, and −40°C to +85°C industrial temperature range.
Technical Context
The MC74ACT32DT implements four independent 2-input OR gates using advanced CMOS technology with bipolar-compatible input stages, enabling direct interface with legacy TTL logic without level-shifting. Its input voltage thresholds (VIH = 2.0 V, VIL = 0.8 V at VCC = 5.0 V) meet standard TTL specifications.
Propagation delays are tightly controlled across temperature and voltage: tPLH/tPHL ≤ 10.0 ns over −40°C to +85°C at VCC = 5.0 V and CL = 50 pF. Output drive strength remains stable at ±24 mA under worst-case conditions, supporting fan-out to multiple LS-TTL loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Quad 2-input OR gate - provides four independent Boolean OR operations per device |
| Supply Voltage Range | 4.5 V to 5.5 V - compatible with standard 5 V digital systems and tolerant of rail variation |
| Output Drive | ±24 mA - drives up to 10 LS-TTL loads or one standard TTL load with margin |
| Propagation Delay | ≤10.0 ns (max, CL = 50 pF) - enables reliable operation in >50 MHz clock-domain edge-sensitive logic |
| Input Thresholds | VIH = 2.0 V, VIL = 0.8 V (VCC = 5.0 V) - ensures robust noise immunity and TTL-level interoperability |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade embedded control and automation environments |
| Input Capacitance | 4.5 pF - minimizes loading on upstream drivers and supports high-frequency signal integrity |
Pinout & Package
TSSOP-14 (DT suffix), Case 948G - 4.4 mm × 5.0 mm body, 0.65 mm lead pitch, thin shrink small-outline package optimized for high-density PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 4, 5, 8, 9, 11, 12 | Input A/B of OR gates | Dedicated logic inputs for four OR gates (G1–G4); TTL-compatible thresholds ensure direct connection to 5 V microcontrollers or legacy logic |
| 3, 6, 10, 13 | Output Y of OR gates | Active-high CMOS outputs capable of sourcing/sinking 24 mA; compatible with TTL, CMOS, and LSTTL loads |
| 7 | GND | Ground reference for all inputs, outputs, and internal circuitry; requires low-impedance PCB return path |
| 14 | VCC | Positive supply terminal (4.5–5.5 V); decoupling capacitor (0.1 µF ceramic) required within 5 mm of pin |
Key Features
| Feature | Design Value |
|---|---|
| TTL-Compatible Inputs | VIH = 2.0 V / VIL = 0.8 V at VCC = 5.0 V - eliminates need for external level shifters when interfacing with 5 V microcontrollers or legacy logic |
| High-Speed Performance | tPLH/tPHL ≤ 10.0 ns (max) at CL = 50 pF - supports clean signal routing in fast combinational logic paths |
| Robust Output Drive | Guaranteed ±24 mA output current - sustains logic levels under heavy capacitive or resistive loading without degradation |
| Low Power Consumption | ICC ≤ 40 µA (max) at VCC = 5.5 V - reduces static power in always-on industrial monitoring circuits |
Applications
| Industrial PLC I/O Expansion | Legacy System Logic Interface |
|---|---|
Use Scenario: Adding discrete OR logic to extend digital input masking or alarm prioritization in programmable logic controller backplanes. IC Role / Device Role / Timing Role: Combinational logic gate performing real-time OR summation of sensor fault signals before CPU interrupt assertion. Use Value: Enables deterministic response (<10 ns latency) to multi-sensor fault conditions while maintaining compatibility with existing 5 V TTL field wiring. | Use Scenario: Bridging between modern FPGA I/O banks and legacy TTL-based peripheral modules in test equipment. IC Role / Device Role / Timing Role: Level-adapting logic buffer that translates FPGA CMOS outputs to TTL-compatible inputs without external resistors or translators. Use Value: Eliminates design complexity and BOM cost by directly satisfying VIH/VIL requirements of 74LS-series peripherals at full speed. |
| Automotive Body Control Module | Medical Diagnostic Instrument Logic |
Use Scenario: Implementing door-lock arbitration logic where multiple switch inputs must OR-enable actuator activation. IC Role / Device Role / Timing Role: Glue logic element combining door-open, key-fob, and ignition signals into a single enable line for solenoid driver ICs. Use Value: Provides automotive-grade temperature resilience (−40°C to +85°C) and ESD-hardened inputs suitable for cabin environment exposure. | Use Scenario: Generating synchronized status flags in portable diagnostic analyzers where multiple subsystem readiness signals must be logically combined. IC Role / Device Role / Timing Role: Deterministic combinatorial gate ensuring sub-10 ns timing correlation between sensor-ready, memory-ready, and processor-ready assertions. Use Value: Guarantees precise timing alignment critical for FDA-compliant data acquisition sequencing without introducing jitter or metastability. |
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 |
|---|---|---|---|
| SN74ACT32DR | SOIC-14 package (D suffix), identical electrical specs and pinout | Larger footprint and lower thermal performance than TSSOP-14; preferred for prototyping or through-hole rework | Select when board space allows larger package or hand-soldering is required |
| 74VHC32MTCX | Wider supply range (2–5.5 V), lower drive (±8 mA), higher propagation delay (≤17.5 ns) | Better suited for mixed-voltage 3.3 V/5 V systems but insufficient for driving multiple TTL loads | Select only if supply voltage flexibility outweighs speed and drive requirements |
Compared with SN74ACT32DR and 74VHC32MTCX, the MC74ACT32DT delivers identical logic functionality and TTL compatibility in a space-constrained TSSOP-14 package with superior drive strength and speed-making it optimal for high-density industrial and automotive control boards where layout area and signal integrity are critical.
Availability
MC74ACT32DT is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, and medical diagnostic instrument logic requiring stable component supply and long-term manufacturing continuity.
Supply support for MC74ACT32DT 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 manufacturer specializing in energy-efficient power, analog, sensor, and logic solutions for automotive, industrial, and cloud infrastructure markets.
The MC74ACT32DT belongs to the 74ACT logic family, designed specifically to deliver TTL-compatible performance with CMOS power efficiency for industrial and automotive control systems demanding reliability across extended temperature ranges.
FAQ
What logic family does the MC74ACT32DT belong to, and how does it differ from standard 74AC devices?
The MC74ACT32DT belongs to the 74ACT (Advanced CMOS TTL-compatible) family. Unlike 74AC devices, which use CMOS input thresholds, the MC74ACT32DT features TTL-compatible input voltage levels (VIH = 2.0 V, VIL = 0.8 V at VCC = 5.0 V), enabling direct interface with legacy TTL outputs without level translation. Its propagation delay and output drive match 74ACT specifications, not 74AC.
What is the maximum operating temperature range certified for the MC74ACT32DT?
MC74ACT32DT is rated for operation from −40°C to +85°C ambient temperature, fully qualified for industrial environments. This range is explicitly guaranteed in the Recommended Operating Conditions table and supported by DC/AC characterization across the full span, making MC74ACT32DT suitable for under-hood automotive or factory-floor control applications.
Does the MC74ACT32DT require external pull-up or pull-down resistors on unused inputs?
No, the MC74ACT32DT does not require external pull-up or pull-down resistors on unused inputs. Its CMOS input structure exhibits negligible leakage (±1.0 µA max), and floating inputs are electrically stable. However, best practice dictates tying unused inputs to VCC or GND to prevent noise-induced switching; this is a system-level design choice, not a device requirement for MC74ACT32DT functionality.
Can the MC74ACT32DT operate reliably at 3.3 V supply voltage?
No, the MC74ACT32DT is not specified for 3.3 V operation. Its Recommended Operating Conditions define VCC min = 4.5 V and max = 5.5 V. At 3.3 V, input thresholds become undefined, output drive collapses, and AC performance degrades beyond specification. For 3.3 V systems, consider 74LVC32 or 74AHC32 instead of MC74ACT32DT.
What packaging format is used for the MC74ACT32DT, and what are its key mechanical dimensions?
The MC74ACT32DT uses the TSSOP-14 package (Case 948G), with body dimensions of 4.4 mm × 5.0 mm and 0.65 mm lead pitch. It features gull-wing leads for surface-mount assembly and is shipped in 96-unit rails. This compact footprint supports high-density routing in space-constrained industrial and automotive PCBs where the MC74ACT32DT is commonly deployed.
MC74ACT32DT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74ACT
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- OR Gate
- Number of Circuits:
- 4
- Number of Inputs:
- 2
- Features:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Max):
- 4 µA
- Current - Output High, Low:
- 24mA, 24mA
- Input Logic Level - Low:
- 0.8V
- Input Logic Level - High:
- 2V
- Max Propagation Delay @ V, Max CL:
- 9ns @ 5V, 50pF
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
MC74ACT32DT FAQ
1.How can I place an order for MC74ACT32DT through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74ACT32DT 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 MC74ACT32DT reliable?
The price and inventory of MC74ACT32DT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74ACT32DT is usually 5 days.
3.What payment methods are accepted for MC74ACT32DT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74ACT32DT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC74ACT32DT?
MC74ACT32DT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74ACT32DT 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 MC74ACT32DT?
For technical support, including MC74ACT32DT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74ACT32DT requirements.
6.How does Aetrix verify that MC74ACT32DT is sourced from the original manufacturer or authorized distributors?
All MC74ACT32DT 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 MC74ACT32DT meets industry standards.
7.What is the process for return or replacement of MC74ACT32DT?
All MC74ACT32DT units undergo pre-shipment inspection (PSI). If there is an issue with MC74ACT32DT, 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 MC74ACT32DT part is unused and in its original packaging.
Return procedure for MC74ACT32DT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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