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NXP Semiconductors 74HCT32DB,118
- Part No.:
- 74HCT32DB,118
- Manufacturer:
- NXP Semiconductors
- Category:
- Gates and Inverters
- Package:
- 14-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74HCT32DB,118.pdf
- Description:
- IC GATE OR 4CH 2-INP 14-SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:14,000
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Product details
Overview
74HCT32DB,118 from Nexperia is a quad 2-input OR gate logic IC with TTL-compatible inputs, 4.5 V to 5.5 V supply range, −40 °C to +125 °C operating temperature, and SO14 (SOT108-1) package. It delivers symmetrical output impedance, balanced propagation delays (11–36 ns), and high noise immunity for digital signal combining in industrial control and embedded interface circuits.
For engineers reviewing the 74HCT32DB,118 datasheet, 74HCT32DB,118 pinout, 74HCT32DB,118 application, or 74HCT32DB,118 equivalent, this device is selected for level-sensitive OR logic in mixed-voltage systems requiring robust input clamping, low ICC (≤40 μA), and JEDEC-compliant TTL-level interfacing at 5 V.
Technical Context
The 74HCT32DB,118 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). Its input clamp diodes enable safe interfacing to voltages exceeding VCC when used with current-limiting resistors.
Propagation delay (tpd) ranges from 9 ns (typ, CL = 15 pF) to 36 ns (max, −40 °C to +125 °C), with transition times (tt) ≤22 ns and power dissipation capacitance CPD = 28 pF - enabling predictable timing in synchronous combinational logic paths and bus arbitration circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Quad 2-input OR gate: each of four gates outputs HIGH if ≥1 input is HIGH; supports basic Boolean summing and active-HIGH enable logic. |
| Supply Voltage (VCC) | 4.5 V to 5.5 V - designed for strict 5 V TTL-compatible operation; not rated for 3.3 V or wide-range use like 74HC variants. |
| Input Thresholds | VIH = 2.0 V min, VIL = 0.8 V max - ensures reliable recognition of standard TTL logic levels without level-shifting. |
| Propagation Delay (tpd) | 11 ns (typ) to 36 ns (max) - enables timing-critical applications such as address decoding and interrupt merging at up to ~10 MHz toggle rates. |
| Output Drive | ±4.0 mA (VOH/VOL @ VCC = 4.5 V) - sufficient to drive 10 LSTTL loads or multiple CMOS inputs without buffering. |
| Operating Temperature | −40 °C to +125 °C - qualified for under-hood automotive modules, industrial PLC I/O, and extended-temperature embedded controllers. |
| ESD Protection | HBM >2000 V, CDM >1000 V - provides robust handling during PCB assembly and field service in noisy environments. |
Pinout & Package
74HCT32DB,118 is supplied in SO14 (SOT108-1) plastic small outline package: 14-lead, 3.9 mm body width, 1.27 mm lead pitch, gull-wing surface-mount format.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A, 4A, 9A, 12A | Input A of Gates 1–4 | First input per OR gate; accepts TTL-level signals; internally clamped to VCC/GND for overvoltage tolerance. |
| 2B, 5B, 10B, 13B | Input B of Gates 1–4 | Second input per OR gate; identical electrical behavior to A inputs; enables dual-input logic combination. |
| 3Y, 6Y, 8Y, 11Y | Output Y of Gates 1–4 | OR result (nY = nA OR nB); rail-to-rail CMOS output swing; drives downstream logic or LEDs directly. |
| 7 | GND | Ground reference (0 V); must be connected to system common; serves as return path for all internal currents. |
| 14 | VCC | Positive supply (4.5–5.5 V); powers all four gates; decoupling capacitor (100 nF) recommended adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible input levels | Enables direct connection to legacy 74LS/74F logic without level shifters or pull-ups in 5 V systems. |
| Symmetrical output impedance | Ensures matched rise/fall times (tt ≤22 ns), minimizing skew in parallel data paths and clocked enable lines. |
| Input clamp diodes | Allows safe interface to signals up to VCC + 0.5 V using external current-limiting resistors - critical for mixed-supply board design. |
| Latch-up immunity | Exceeds 100 mA per JESD78 Class II Level B - prevents destructive latch-up during transient overvoltage events. |
| Wide temperature range | Specified from −40 °C to +125 °C - supports deployment in motor drives, power supplies, and outdoor industrial enclosures. |
Applications
| Industrial Control Logic | Microcontroller Peripheral Interface |
|---|---|
Use Scenario: Combining multiple fault signals (e.g., overtemperature, overcurrent, fan failure) into a single SYSTEM_FAULT line for microcontroller polling or interrupt assertion. IC Role / Device Role / Timing Role: Active-HIGH OR combiner aggregating asynchronous status flags; no setup/hold timing constraints due to combinational nature. Use Value: Reduces GPIO count on host MCU by 3 pins while maintaining real-time fault visibility via single interrupt-capable input. |
Use Scenario: Enabling shared peripheral access (e.g., SPI flash, UART transceiver) across multiple controller subsystems using chip-select arbitration. IC Role / Device Role / Timing Role: Gate-level enable logic that asserts CS when any requesting core asserts its local EN signal. Use Value: Eliminates need for firmware-managed bus arbitration; guarantees sub-10 ns response to request edges without software latency. |
| Power Sequencing Monitor | Legacy System Signal Conditioning |
Use Scenario: Validating presence of three independent power rails (3.3 V, 5 V, 12 V) before releasing reset to FPGA or DSP. IC Role / Device Role / Timing Role: OR gate detecting first valid rail; output inverted and fed to reset generator to hold device in reset until all rails are stable. Use Value: Provides hardware-enforced power-good sequencing with zero firmware dependency and <100 ns detection latency. |
Use Scenario: Converting open-collector outputs from older sensors or optocouplers into clean CMOS-compatible active-HIGH logic levels for modern MCU inputs. IC Role / Device Role / Timing Role: Pull-up-assisted OR gate reconstructing logic HIGH from collector-open signals tied to VCC via resistors. Use Value: Enables drop-in replacement of obsolete 74LS32 in brownfield upgrades without redesigning sensor interface boards. |
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 |
|---|---|---|---|
| 74HCT32D,118 | Same die, identical specs, but in SO14 package with different ordering suffix (no 'B' in part number); pinout and thermal performance identical. | No functional difference; used interchangeably in same PCB footprints where both are stocked. | Select when sourcing flexibility or alternate logistics channels are required; no design change needed. |
| SN74HCT32DR | TI variant: VIH = 2.0 V min, VIL = 0.8 V max, tpd = 13–35 ns, SO14 package; identical AC/DC specs but different ESD ratings (HBM >2000 V vs TI's >4000 V). | Valid for same 5 V TTL-interfaced logic roles; higher HBM margin suits high-handling-volume manufacturing environments. | Prefer for high-reliability production with aggressive ESD control requirements; verify layout compatibility for thermal pad (none on SN74HCT32DR). |
Compared with 74HCT32DB,118, the 74HCT32D,118 offers identical functionality with logistics differentiation, while SN74HCT32DR provides enhanced HBM robustness at the cost of manufacturer-specific qualification - making the former ideal for footprint reuse and the latter for ESD-critical assembly lines.
Availability
74HCT32DB,118 is available at Aetrix Electronics and suitable for industrial control logic, microcontroller peripheral interface, and power sequencing monitor applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74HCT32DB,118 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 focused on high-volume, high-reliability logic, analog, and discrete components - delivering energy-efficient, industry-standard solutions for automotive, industrial, and consumer markets.
The 74HCT32DB,118 belongs to Nexperia's 74HCT logic family, engineered specifically for seamless integration with legacy TTL systems while leveraging CMOS efficiency - targeting cost-sensitive, thermally demanding applications where pin compatibility and input-level fidelity are critical.
FAQ
Is 74HCT32DB,118 compatible with 3.3 V logic inputs?
No. The 74HCT32DB,118 has TTL input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) optimized for 5 V systems. While a 3.3 V HIGH may exceed VIH in some cases, it violates the guaranteed VIH spec (2.0 V min at VCC = 4.5–5.5 V) and risks marginal switching. Use 74HC32 or level translators for 3.3 V interfaces.
What is the maximum capacitive load this device can drive reliably?
The 74HCT32DB,118 is characterized with CL = 50 pF in dynamic testing and supports up to 50 pF per output while maintaining specified tpd and tt. Driving >50 pF increases propagation delay nonlinearly and may cause ringing; add series termination or buffer stages for heavier loads.
Does this part include an exposed thermal pad?
No. The 74HCT32DB,118 uses the SO14 (SOT108-1) package, which has gull-wing leads only - no exposed thermal pad. Thermal performance relies on PCB copper area connected to pins 7 (GND) and 14 (VCC); no solder paste or stencil aperture is required beneath the body.
Can I substitute 74HCT32DB,118 for 74LS32 in an existing design?
Yes - with verification. Both are quad 2-input OR gates in SO14 packages with identical pinouts and TTL-compatible inputs. However, 74HCT32DB,118 draws <40 μA ICC (vs LS's ~15 mA), eliminates DC loading concerns, and improves noise immunity. Confirm timing margins, as tpd differs (LS: ~15 ns, HCT: 11–36 ns).
74HCT32DB,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74HCT
- Package/Case:
- 14-SSOP (0.209", 5.30mm 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):
- 2 µA
- Current - Output High, Low:
- 4mA, 5.2mA
- Input Logic Level - Low:
- 0.8V
- Input Logic Level - High:
- 2V
- Max Propagation Delay @ V, Max CL:
- 24ns @ 4.5V, 50pF
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SSOP
74HCT32DB,118 FAQ
1.How can I place an order for 74HCT32DB,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT32DB,118 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 74HCT32DB,118 reliable?
The price and inventory of 74HCT32DB,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT32DB,118 is usually 5 days.
3.What payment methods are accepted for 74HCT32DB,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT32DB,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT32DB,118?
74HCT32DB,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT32DB,118 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 74HCT32DB,118?
For technical support, including 74HCT32DB,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT32DB,118 requirements.
6.How does Aetrix verify that 74HCT32DB,118 is sourced from the original manufacturer or authorized distributors?
All 74HCT32DB,118 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 74HCT32DB,118 meets industry standards.
7.What is the process for return or replacement of 74HCT32DB,118?
All 74HCT32DB,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT32DB,118, 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 74HCT32DB,118 part is unused and in its original packaging.
Return procedure for 74HCT32DB,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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