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onsemi 74HCT32DR2G
- Part No.:
- 74HCT32DR2G
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
74HCT32DR2G.pdf
- Description:
- IC GATE OR 4CH 2-INP 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,295
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Product details
Overview
74HCT32DR2G from onsemi is a quad 2-input OR gate with LSTTL-compatible inputs, fabricated in high-performance silicon-gate CMOS. It operates from 4.5 V to 5.5 V, delivers 10 LSTTL load drive capability, exhibits 22 ns max propagation delay at 125°C, and supports industrial temperature range (–55°C to +125°C). It is used in digital logic interfacing, bus arbitration, and control signal combining in industrial control systems.
For engineers reviewing the 74HCT32DR2G datasheet, pinout, applications, or equivalent options, key selection criteria include TTL-compatible input thresholds (VIH = 2.0 V, VIL = 0.8 V), SOIC-14 Pb-free packaging, guaranteed 4.4 V VOH at 4.5 V supply, and JEDEC Std. 7A compliance for interoperability with legacy TTL systems.
Technical Context
The 74HCT32DR2G implements four independent OR logic functions (Y = A + B) using CMOS technology with buffered TTL-level input stages. Its input structure ensures compatibility with both LS-TTL and NMOS outputs while maintaining CMOS power efficiency and noise immunity.
All four gates share a common VCC (Pin 14) and GND (Pin 7) supply rail. The device requires unused inputs to be tied to VCC or GND to prevent floating states, and outputs are designed for direct interface to CMOS, NMOS, and TTL loads without external level-shifting circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Quad 2-input OR gate (Y = A + B), each gate fully independent |
| Supply Voltage Range | 4.5 V to 5.5 V - ensures stable operation across standard 5 V ±10% rails |
| Propagation Delay (tPLH/tPHL) | 22 ns max at 125°C, CL = 50 pF - defines maximum clock/data rate in combinational logic paths |
| Input Voltage Thresholds | VIH = 2.0 V min, VIL = 0.8 V max - guarantees reliable recognition of LS-TTL output levels |
| Output Drive | 10 LSTTL loads - supports fan-out to multiple legacy TTL inputs without buffering |
| Operating Temperature | –55°C to +125°C - qualified for extended industrial and automotive under-hood environments |
| ESD Rating | HBM 2000 V - meets robustness requirements for manual handling and board assembly |
Pinout & Package
74HCT32DR2G is housed in a Pb-free SOIC-14 package (Case 751A), measuring 8.75 mm × 4.00 mm × 1.75 mm, with 1.27 mm pitch and gull-wing leads.
| 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; TTL-compatible thresholds ensure interoperability with LS-family outputs |
| 3, 6, 8, 11 | Output (Y1/Y2/Y3/Y4) | CMOS push-pull outputs capable of sourcing/sinking 4 mA while maintaining VOH ≥ 3.7 V / VOL ≤ 0.4 V |
| 7 | GND | Ground reference for all inputs, outputs, and internal circuitry; must be low-impedance connection |
| 14 | VCC | Positive supply rail; decoupling capacitor (0.1 µF) recommended adjacent to this pin |
Key Features
| Feature | Design Value |
|---|---|
| LSTTL-compatible inputs | Enables direct replacement of 74LS32 in existing designs without level-shifting components |
| 10 LSTTL load drive | Supports fan-out to up to ten standard TTL inputs per output, reducing need for buffer stages |
| JEDEC Std. 7A compliance | Guarantees interoperability with industry-standard TTL logic families across voltage and timing specs |
| Pb-free SOIC-14 package | Meets RoHS Directive 2011/65/EU and facilitates lead-free reflow soldering processes |
| High noise immunity | CMOS input structure provides >400 mV noise margin at VCC = 4.5 V, improving reliability in electrically noisy environments |
Applications
| Industrial Control Logic | Legacy System Interface |
|---|---|
Use Scenario: Combining enable signals from multiple PLC modules before driving a shared actuator enable line. IC Role / Device Role / Timing Role: Combinational logic gate performing real-time OR function with sub-25 ns latency. Use Value: Eliminates need for discrete transistor-based wired-OR, reducing component count and board space while preserving deterministic timing. | Use Scenario: Interfacing modern microcontroller GPIOs (5 V tolerant) to legacy LS-TTL peripheral address decoders. IC Role / Device Role / Timing Role: Level-adaptive logic translator ensuring correct interpretation of TTL output voltages as CMOS inputs. Use Value: Maintains signal integrity across technology generations without external pull-ups or resistive dividers. |
| Power Sequencing Monitor | Redundant Signal Voting |
Use Scenario: Monitoring three independent DC-DC converter OK signals to generate a single system power-good flag. IC Role / Device Role / Timing Role: Fault-tolerant combiner where any one healthy supply asserts the global OK status. Use Value: Provides fail-operational behavior with no additional timing uncertainty beyond gate propagation delay. | Use Scenario: Voting logic in dual-redundant sensor interfaces where either channel's valid signal enables data acquisition. IC Role / Device Role / Timing Role: Asynchronous OR gate enabling immediate response to first-valid event across channels. Use Value: Reduces worst-case latency versus sequential polling, critical for safety-critical response windows. |
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 |
|---|---|---|---|
| SN74HCT32DR | Same logic function, identical AC/DC specs, but offered in SOIC-14 with standard (non-Pb-free) finish | Not suitable for RoHS-compliant production; otherwise drop-in compatible in non-regulated environments | Select when Pb-free compliance is not required and legacy inventory reuse is prioritized |
| MC74HCT32ADTR2G | Identical electrical specs and pinout; differs only in tape-and-reel packaging (1000 pcs vs. 2500 pcs) and marking format | No functional or layout impact; choice driven by procurement volume and assembly line feeder compatibility | Select when matching smaller reel sizes or specific onsemi marking conventions is required |
Compared with SN74HCT32DR and MC74HCT32ADTR2G, the 74HCT32DR2G offers identical logic performance and SOIC-14 footprint but is uniquely specified with Pb-free terminations and 2500-piece tape-and-reel packaging - making it optimal for high-volume, RoHS-aligned manufacturing with automated placement.
Availability
74HCT32DR2G is available at Aetrix Electronics and suitable for industrial control logic, legacy system interface, and power sequencing monitor applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for 74HCT32DR2G 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 management, analog, sensors, and logic solutions for automotive, industrial, cloud, and IoT applications.
The 74HCT32DR2G belongs to the HCT (High-speed CMOS TTL-compatible) logic family, engineered to bridge legacy TTL systems with modern CMOS power efficiency while maintaining pin-for-pin compatibility with 74LS-series devices.
FAQ
What logic function does the 74HCT32DR2G implement?
The 74HCT32DR2G implements four independent 2-input OR gates (Y = A + B), each operating with TTL-compatible input thresholds and CMOS output drive. All gates share common VCC (Pin 14) and GND (Pin 7). This functionality is confirmed in the logic diagram and truth table of the official onsemi datasheet for 74HCT32DR2G, with no enable or control pins - it is purely combinational logic.
Is the 74HCT32DR2G pin-compatible with the 74LS32?
Yes, the 74HCT32DR2G is explicitly designed to be pin-compatible with the 74LS32, as stated in the datasheet: "The 74HCT32 is identical in pinout to the LS32." Pin assignments for inputs (A1–B4), outputs (Y1–Y4), VCC, and GND match exactly, enabling direct replacement in existing LS32-based PCB layouts without modification.
What is the maximum operating temperature range for the 74HCT32DR2G?
The 74HCT32DR2G is rated for operation from –55°C to +125°C, as specified in the Recommended Operating Conditions table of the onsemi datasheet. This extended industrial temperature range makes it suitable for deployment in harsh environments such as factory automation controllers, outdoor telecom equipment, and under-hood automotive modules.
Does the 74HCT32DR2G require external pull-up or pull-down resistors on unused inputs?
Yes - unused inputs on the 74HCT32DR2G must be tied to a defined logic level (either VCC or GND) to prevent floating states that could cause excessive supply current or erratic output behavior. The datasheet explicitly states: "Unused inputs must always be tied to an appropriate logic voltage level (e.g., either GND or VCC)." Pull-up/pull-down resistors are required only if the driving source is open-drain or high-impedance; otherwise, direct connection suffices.
What packaging and reel quantity is supplied for the 74HCT32DR2G?
The 74HCT32DR2G is supplied in a Pb-free SOIC-14 package (Case 751A) on tape-and-reel with 2500 units per reel, as documented in the Ordering Information section of the onsemi datasheet. The "DR2G" suffix specifically denotes this packaging configuration, distinguishing it from variants like DTR2G (TSSOP-14) or DR (standard SOIC without Pb-free marking).
74HCT32DR2G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74HCT
- 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:
- 4mA, 4mA
- Input Logic Level - Low:
- 0.8V
- Input Logic Level - High:
- 2V
- Max Propagation Delay @ V, Max CL:
- 15ns @ 4.5V, 50pF
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
74HCT32DR2G FAQ
1.How can I place an order for 74HCT32DR2G through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT32DR2G 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 74HCT32DR2G reliable?
The price and inventory of 74HCT32DR2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT32DR2G is usually 5 days.
3.What payment methods are accepted for 74HCT32DR2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT32DR2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT32DR2G?
74HCT32DR2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT32DR2G 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 74HCT32DR2G?
For technical support, including 74HCT32DR2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT32DR2G requirements.
6.How does Aetrix verify that 74HCT32DR2G is sourced from the original manufacturer or authorized distributors?
All 74HCT32DR2G 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 74HCT32DR2G meets industry standards.
7.What is the process for return or replacement of 74HCT32DR2G?
All 74HCT32DR2G units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT32DR2G, 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 74HCT32DR2G part is unused and in its original packaging.
Return procedure for 74HCT32DR2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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