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NXP Semiconductors 74HCT32D,652
- Part No.:
- 74HCT32D,652
- Manufacturer:
- NXP Semiconductors
- Category:
- Gates and Inverters
- Package:
- -
- Datasheet:
-
74HCT32D,652.pdf
- Description:
- IC GATE OR
- Quantity:
- Payment:
- Shipping:
Inventory:5,626
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Product details
Overview
74HCT32D,652 from Nexperia is a quad 2-input OR gate logic IC with TTL-compatible inputs, 14-pin SO14 (SOT108-1) package, −40 °C to +125 °C operating range, and 4.5 V–5.5 V supply voltage. It performs Boolean OR logic for digital signal routing in control logic, bus arbitration, and enable gating circuits within industrial microcontroller interfaces.
For engineers reviewing the 74HCT32D,652 datasheet, 74HCT32D,652 pinout, 74HCT32D,652 application, or 74HCT32D,652 equivalent, key selection criteria include TTL-level input compatibility, propagation delay ≤24 ns at 5 V, symmetrical output drive (±4 mA), SO14 thermal derating profile, and −40 °C to +125 °C automotive-grade temperature support.
Technical Context
The 74HCT32D,652 implements four independent 2-input OR gates using CMOS technology with TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V). Each gate features clamp diodes on inputs, enabling safe interfacing to voltages exceeding VCC when used with current-limiting resistors.
It delivers balanced HIGH/LOW output impedance and matched propagation delays (tPHL/tPLH ≤24 ns typical at VCC = 4.5 V, CL = 50 pF), ensuring deterministic timing in synchronous logic trees. The device complies with JEDEC JESD7A and JESD8C standards and supports latch-up immunity >100 mA per JESD78 Class II Level B.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Quad 2-input OR gate - provides four independent Boolean OR operations per package |
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5 V TTL and mixed-voltage systems |
| Input Thresholds | VIH ≥ 2.0 V, VIL ≤ 0.8 V - enables direct interface with legacy TTL outputs without level shifting |
| Output Drive | ±4.0 mA at VOH/VOL - sufficient to drive multiple 74-series inputs or small capacitive loads (≤50 pF) |
| Propagation Delay | 11–36 ns (−40 °C to +125 °C) - guarantees timing predictability across full industrial temperature range |
| Operating Temperature | −40 °C to +125 °C - qualified for under-hood, motor control, and high-reliability industrial environments |
| ESD Protection | HBM >2000 V, CDM >1000 V - reduces risk of handling damage during PCB assembly |
Pinout & Package
74HCT32D,652 uses the SO14 (SOT108-1) plastic small outline package: 14-lead, 3.9 mm body width, 1.27 mm lead pitch, and gull-wing surface-mount terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A, 4A, 9A, 12A | Input A of Gates 1–4 | First OR input per gate; accepts TTL-level signals; includes input clamp diode |
| 2B, 5B, 10B, 13B | Input B of Gates 1–4 | Second OR input per gate; electrically identical to A inputs; supports overvoltage tolerance |
| 3Y, 6Y, 8Y, 11Y | Output Y of Gates 1–4 | OR result (nY = nA ∨ nB); rail-to-rail CMOS output swing; ±4 mA drive capability |
| 7 | GND | Ground reference (0 V); must be low-impedance connection for noise immunity and timing stability |
| 14 | VCC | Positive supply (4.5–5.5 V); decoupling capacitor (100 nF) required near pin for transient suppression |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | VIH ≥ 2.0 V / VIL ≤ 0.8 V at 5 V - eliminates need for external level translators when interfacing with 74LS or microcontroller GPIO |
| Symmetrical output impedance | Matched HIGH/LOW drive strength - prevents duty-cycle distortion in clock or enable signals routed through OR logic |
| Input clamp diodes | Enables safe interface to voltages > VCC via series resistors - simplifies design of mixed-supply signal conditioning |
| High noise immunity | Typical noise margin >1.2 V - maintains logic integrity in electrically noisy industrial or motor-drive environments |
| Latch-up immunity | Exceeds 100 mA per JESD78 Class II Level B - ensures robustness against transient overcurrent events |
Applications
| Industrial PLC I/O Expansion | Microcontroller Interrupt Aggregation |
|---|---|
|
Use Scenario: Combining discrete sensor fault signals (e.g., overtemperature, overcurrent, door-open) into a single hardware interrupt line for an ARM Cortex-M4 controller. IC Role / Device Role / Timing Role: Logic OR gate performing wired-OR aggregation of asynchronous active-high fault flags. Use Value: Reduces MCU GPIO usage by 3 pins; propagation delay <24 ns ensures sub-microsecond fault detection latency. |
Use Scenario: Merging multiple peripheral ready signals (UART TX-ready, SPI buffer-full, I²C ACK received) into one system "data-ready" flag. IC Role / Device Role / Timing Role: Combinational logic element generating synchronized readiness indication for DMA trigger or polling loop exit. Use Value: Enables deterministic response within 36 ns worst-case delay; TTL input compatibility allows direct connection to peripheral output drivers. |
| Motor Control Enable Gating | Legacy System Bus Arbitration |
|
Use Scenario: Enabling H-bridge driver ICs only when both safety interlock and motion command signals are asserted. IC Role / Device Role / Timing Role: Safety-critical combinational gate verifying dual-condition activation before power stage enable. Use Value: −40 °C to +125 °C rating supports under-hood deployment; symmetrical output ensures clean enable edge for gate driver input. |
Use Scenario: Resolving bus grant requests from multiple 8-bit microprocessors sharing a common data/address bus in retro-computing restoration. IC Role / Device Role / Timing Role: Priority-agnostic OR function combining GRANT# lines to generate centralized bus availability signal. Use Value: SO14 package fits legacy PCB footprints; 5 V operation matches vintage TTL bus voltage; low ICC (<40 μA) minimizes standby power draw. |
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 |
|---|---|---|---|
| 74HCT32PW,118 | TSSOP14 (SOT402-1) package; 0.65 mm pitch; 4.4 mm body width; 15% smaller footprint than SO14 | Better thermal resistance (7.3 mW/K derating above 81 °C) but lower creepage/clearance; unsuitable for wave soldering | Select for space-constrained PCBs where reflow-only assembly is used and thermal load is moderate. |
| SN74HCT32DR | Texas Instruments part; SO14 package; identical pinout; VIH/VIL specs match within 0.1 V; tpd max 27 ns at 5 V | Same functional behavior but different ESD ratings (HBM 2000 V vs TI's 4000 V); RoHS status differs per batch | Use only if TI's extended HBM rating is required; verify Pb-free compliance against latest TI PCN for production use. |
Compared with 74HCT32D,652, the TSSOP variant offers board-area savings at the cost of reduced thermal headroom and assembly flexibility, while the TI alternative provides higher ESD robustness but requires verification of lifecycle status and RoHS documentation for long-term sourcing.
Availability
74HCT32D,652 is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, and legacy system upgrades requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74HCT32D,652 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
Nexperia is a global semiconductor expert delivering high-performance logic, analog, and MOSFET solutions optimized for efficiency, reliability, and manufacturability in high-volume applications.
The 74HCT32D,652 belongs to Nexperia's 74HCT logic family-designed specifically for seamless integration between TTL and CMOS systems in industrial automation, automotive subsystems, and infrastructure equipment.
FAQ
Can 74HCT32D,652 operate at 3.3 V?
No. The 74HCT32D,652 is specified only for 4.5 V to 5.5 V supply. At 3.3 V, input thresholds fall outside TTL compatibility (VIH minimum becomes ~1.5 V), and output drive degrades below guaranteed levels. For 3.3 V systems, use 74LVC32 or 74AHC32 instead.
What is the maximum capacitive load this IC can drive reliably?
The 74HCT32D,652 is characterized up to 50 pF load capacitance in dynamic testing. Driving >50 pF may increase propagation delay nonlinearly and cause overshoot/ringing. For >100 pF loads, add a series resistor (22–47 Ω) near the output to dampen reflections and maintain signal integrity.
Does this part support hot-swap or live-insertion?
No. The 74HCT32D,652 lacks powered-off protection circuitry. Applying input signals before VCC is stable risks forward-biasing internal clamp diodes, causing excessive current flow and potential damage. Always sequence VCC before applying inputs in hot-swap designs.
Is there a lead-free and RoHS-compliant version available?
Yes. 74HCT32D,652 is manufactured in full compliance with RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. Nexperia confirms homogeneous material compliance and provides full substance declarations upon request for qualifying customers.
74HCT32D,652 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- 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:
- -
74HCT32D,652 FAQ
1.How can I place an order for 74HCT32D,652 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT32D,652 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 74HCT32D,652 reliable?
The price and inventory of 74HCT32D,652 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT32D,652 is usually 5 days.
3.What payment methods are accepted for 74HCT32D,652?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT32D,652 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT32D,652?
74HCT32D,652 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT32D,652 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 74HCT32D,652?
For technical support, including 74HCT32D,652 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT32D,652 requirements.
6.How does Aetrix verify that 74HCT32D,652 is sourced from the original manufacturer or authorized distributors?
All 74HCT32D,652 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 74HCT32D,652 meets industry standards.
7.What is the process for return or replacement of 74HCT32D,652?
All 74HCT32D,652 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT32D,652, 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 74HCT32D,652 part is unused and in its original packaging.
Return procedure for 74HCT32D,652:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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