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Texas Instruments SN74AHCT1G32DCKR
- Part No.:
- SN74AHCT1G32DCKR
- Manufacturer:
- Texas Instruments
- Category:
- Gates and Inverters
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
SN74AHCT1G32DCKR.pdf
- Description:
- IC GATE OR 1CH 2-INP SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:5,931
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Product details
Overview
SN74AHCT1G32 from Texas Instruments is a single 2-input positive-OR gate IC designed for level-shifting logic interfacing in 5-V systems. It operates from 4.5 V to 5.5 V, delivers ±8 mA output drive, exhibits 8 ns max propagation delay at 5 V, and accepts TTL-compatible inputs (VIH = 2 V, VIL = 0.8 V), enabling reliable integration in server motherboard power sequencing and automotive cluster signal conditioning.
For engineers reviewing the SN74AHCT1G32 datasheet, SN74AHCT1G32 pinout, SN74AHCT1G32 application, or SN74AHCT1G32 equivalent, this page provides verified functional identity, SC-70 (DCK) package mapping, confirmed 5-pin terminal roles, real-world timing and drive specifications, and two validated alternative parts for 5-V OR-gate replacement scenarios.
Technical Context
The SN74AHCT1G32 implements positive-logic Boolean OR (Y = A + B) using CMOS technology with TTL-voltage-compatible inputs, allowing direct interface with 3.3-V logic while operating at 5 V. Its input structure remains high-impedance when VCC = 0 V, supporting hot-insertion safety.
It features slow output edge rates (20 ns/V input transition rate limit) to suppress ringing on light loads, and supports full industrial temperature range (–40°C to +125°C) with latch-up immunity exceeding 250 mA per JESD17. No enable or tri-state functionality is present - it is a fixed-function, totem-pole output gate.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with regulated 5-V rails and tolerance for supply ripple. |
| Propagation Delay | Max 8 ns at 5 V, CL = 15 pF - enables use in sub-100-MHz digital control paths without timing closure issues. |
| Output Drive | ±8 mA at 5 V - sufficient to drive multiple 74-series TTL inputs or small capacitive loads (<30 pF). |
| Input Compatibility | TTL-level (VIH ≥ 2 V, VIL ≤ 0.8 V) - allows direct connection to legacy 3.3-V microcontrollers and FPGAs without level shifters. |
| Quiescent Current | 10 µA max ICC - supports low-static-power system states in always-on I/O modules and PLC inputs. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive clusters and industrial motor drive control logic. |
| ESD Rating | ±2000 V HBM - meets standard handling requirements for board assembly and field service environments. |
Pinout & Package
SN74AHCT1G32DCKR uses the SC-70 (DCK) 5-pin surface-mount package (2.00 mm × 2.10 mm body, 1.1 mm max height), optimized for space-constrained PCB layouts in consumer and automotive electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (A) | Input A | Primary logic input; must be tied to VCC or GND if unused to prevent floating and undefined output states. |
| 2 (B) | Input B | Secondary logic input; electrically identical to Pin 1 and shares same TTL voltage thresholds. |
| 3 (GND) | Ground | Reference return path for all internal circuitry and output current; requires low-inductance connection to system ground plane. |
| 4 (Y) | Output Y | CMOS totem-pole output delivering OR result; not 3-state - cannot be wire-OR'd without external isolation. |
| 5 (VCC) | Power Supply | 5-V supply pin; requires local 0.1-µF ceramic bypass capacitor placed within 2 mm of the pin per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | Enables direct interfacing with 3.3-V logic families (e.g., microcontrollers, FPGAs) while operating at 5 V - no external level shifter required. |
| Low-noise output edges | Controlled rise/fall times minimize EMI and signal integrity issues in dense routing environments like server motherboards. |
| High-impedance inputs at VCC = 0 V | Permits safe hot-plug operation in modular I/O systems where power sequencing may leave logic unpowered during insertion. |
| Latch-up immunity | Exceeds 250 mA per JESD17 - ensures robustness against transient overcurrent events in motor drive feedback paths. |
| Industrial temperature range | –40°C to +125°C operation supports deployment in automotive instrument clusters and industrial PLC analog input modules. |
Applications
| Server Motherboards | Automotive Clusters |
|---|---|
Use Scenario: Power-good signal aggregation across multiple VRMs before releasing CPU reset. IC Role / Device Role / Timing Role: Single 2-input OR gate combining independent 12-V and 5-V rail status signals into one system-ready indicator. Use Value: Eliminates need for discrete diode-OR or larger logic packages, reducing BOM count and PCB area in tight DIMM slot regions. |
Use Scenario: Combining turn-signal and hazard warning inputs to drive shared LED driver enable logic. IC Role / Device Role / Timing Role: Positive-OR function generating active-high enable for backlight or buzzer drivers based on any warning activation. Use Value: Provides fail-safe redundancy - if either input asserts, output activates immediately with <8 ns delay, meeting ASIL-B timing constraints. |
| I/O Modules | Motor Drives and Controls |
Use Scenario: Merging isolated digital inputs from field sensors (e.g., limit switches, emergency stops) into a unified fault bus. IC Role / Device Role / Timing Role: Logic-level OR gate performing real-time fault-or'ing prior to PLC scan cycle processing. Use Value: Enables deterministic response (<10 ns) to critical faults independent of software scan time - essential for SIL-2-rated analog DCS inputs. |
Use Scenario: Enabling gate-driver ICs only when both PWM enable and thermal shutdown signals are inactive. IC Role / Device Role / Timing Role: Active-high OR gate inverted via external pull-down to generate safe-disable logic for IGBT drivers. Use Value: Guarantees immediate driver disable (<8 ns) upon any fault detection, preventing shoot-through in half-bridge configurations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 2-input OR gate applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC1G32DCKR | Lower supply range (1.65–5.5 V); higher speed (4.5 ns typ); CMOS-only inputs (no TTL compatibility). | Better suited for mixed-voltage 3.3/5-V systems with strict timing budgets; unsuitable where legacy 3.3-V TTL outputs must drive the gate. | Select when interfacing modern 3.3-V FPGAs or when 5-V-only operation is not required. |
| SN74AHCT1G32DBVR | Identical logic, specs, and temperature range; differs only in SOT-23 (DBV) package (2.9 mm × 2.8 mm vs. DCK's 2.0 mm × 2.1 mm). | Requires PCB footprint change; offers slightly better thermal resistance (RθJA = 278°C/W vs. 287.6°C/W) but occupies ~3× more board area. | Choose for legacy designs already using DBV footprints or where manual rework accessibility outweighs size constraints. |
Compared with SN74LVC1G32DCKR, SN74AHCT1G32DCKR provides guaranteed TTL input compatibility critical for interfacing older controllers, while SN74AHCT1G32DBVR offers identical electrical behavior in a larger, thermally advantaged package - neither is pin-compatible without layout revision.
Availability
SN74AHCT1G32DCKR is available at Aetrix Electronics and suitable for server motherboard power sequencing, automotive cluster warning logic, and industrial I/O module fault aggregation requiring stable component supply across extended production lifecycles.
Supply support for SN74AHCT1G32DCKR 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic solutions, with decades of experience in high-reliability industrial and automotive IC design.
The SN74AHCT1G32 belongs to TI's AHCT logic family, engineered specifically for 5-V systems requiring TTL-compatible inputs, robust noise immunity, and extended temperature operation - targeting industrial control, automotive instrumentation, and infrastructure equipment.
FAQ
What logic function does the SN74AHCT1G32DCKR implement?
The SN74AHCT1G32DCKR implements a single 2-input positive-OR Boolean function (Y = A + B) in positive logic. It outputs HIGH whenever at least one input is HIGH, and LOW only when both inputs are LOW. This behavior is confirmed in the device functional table and schematic diagram of the official SN74AHCT1G32 datasheet.
Can SN74AHCT1G32DCKR interface directly with 3.3-V microcontrollers?
Yes, SN74AHCT1G32DCKR accepts TTL-compatible input voltages (VIH ≥ 2 V, VIL ≤ 0.8 V), allowing direct connection to 3.3-V microcontroller GPIOs without level shifting. Its inputs correctly interpret 3.3-V HIGH signals as valid logic HIGH when powered at 5 V - a key feature documented in Section 7.3 of the SN74AHCT1G32 datasheet.
What is the maximum operating temperature for SN74AHCT1G32DCKR?
The SN74AHCT1G32DCKR is rated for continuous operation from –40°C to +125°C, as specified in the Recommended Operating Conditions table (Section 5.3) of its datasheet. This full industrial temperature range supports deployment in under-hood automotive clusters and high-ambient industrial motor drives.
Does SN74AHCT1G32DCKR have tri-state or open-drain output capability?
No, SN74AHCT1G32DCKR features a standard CMOS totem-pole output with no enable or tri-state control. It cannot be configured for high-impedance output states. The device functional modes table confirms only two output states: HIGH (driving) and LOW (driving) - no Z-state is supported.
What package type is used by SN74AHCT1G32DCKR?
SN74AHCT1G32DCKR uses the SC-70 (DCK) 5-pin surface-mount package, measuring 2.00 mm × 2.10 mm in body size with a maximum height of 1.1 mm. This compact footprint is explicitly listed in TI's Package Information table and confirmed in the orderable part number suffix "DCKR".
SN74AHCT1G32DCKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AHCT
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- OR Gate
- Number of Circuits:
- 1
- Number of Inputs:
- 2
- Features:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Max):
- 1 µA
- Current - Output High, Low:
- 8mA, 8mA
- Input Logic Level - Low:
- 0.8V
- Input Logic Level - High:
- 2V
- Max Propagation Delay @ V, Max CL:
- 7.9ns @ 5V, 50pF
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
SN74AHCT1G32DCKR FAQ
1.How can I place an order for SN74AHCT1G32DCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHCT1G32DCKR 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 SN74AHCT1G32DCKR reliable?
The price and inventory of SN74AHCT1G32DCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHCT1G32DCKR is usually 5 days.
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SN74AHCT1G32DCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AHCT1G32DCKR 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 SN74AHCT1G32DCKR?
For technical support, including SN74AHCT1G32DCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHCT1G32DCKR requirements.
6.How does Aetrix verify that SN74AHCT1G32DCKR is sourced from the original manufacturer or authorized distributors?
All SN74AHCT1G32DCKR 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 SN74AHCT1G32DCKR meets industry standards.
7.What is the process for return or replacement of SN74AHCT1G32DCKR?
All SN74AHCT1G32DCKR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHCT1G32DCKR, 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 SN74AHCT1G32DCKR part is unused and in its original packaging.
Return procedure for SN74AHCT1G32DCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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