SN74AHCT3G99-Q1 - Triple Configurable Gate | TI | Automotive
MPN: SN74AHCT3G99-Q1 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.85 | $0.85 |
| 10 | $0.76 | $7.60 |
| 100 | $0.68 | $68.00 |
| 500 | $0.61 | $305.00 |
| 1,000 | $0.55 | $550.00 |
Drop-in alternatives for SN74AHCT3G99-Q1 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
SN74AHCT3G99QPWRQ1
β Drop-Inπ Reference alternative (not in catalog)
SN74AHCT3G99DGSR
β Drop-Inπ Reference alternative (not in catalog)
SN74AHC3G99-Q1
β Drop-Inβ In Stock
$0.55 / Unit
View Datasheet βSN74LV3T99-Q1
β Drop-Inβ In Stock
$0.76 / Unit
View Datasheet β74AHCT3G99
β Drop-Inπ Reference alternative (not in catalog)
SN74AHCT3G99-Q1 Maximum Ratings & Electrical Characteristics
| Number of Gates | 3 |
| Inputs per Gate | 4 |
| Output Type | 3-State |
| Logic Function | Y = (A β’ /C + B β’ C) β D |
| Supply Voltage Range | 4.5 V to 5.5 V |
| Input Type | Schmitt-Trigger |
| Output Current | [DATA_NEEDED: output current] |
| Propagation Delay | [DATA_NEEDED: propagation delay] |
| Operating Temperature Range | -40Β°C to +125Β°C |
| Package | 20-TSSOP (PW) |
| Mounting Type | Surface Mount |
| Qualification | AEC-Q100 |
| RoHS Status | Compliant |
| Max Load Capacitance | 50 pF |
| Logic Family | AHCT |
SN74AHCT3G99-Q1 Pin Configuration
| Pin 1 | 1A β Input A of gate 1 |
| Pin 2 | 1B β Input B of gate 1 |
| Pin 3 | 1C β Input C of gate 1 |
| Pin 4 | 1D β Input D of gate 1 |
| Pin 5 | 1Y β Output Y of gate 1 |
| Pin 6 | 2A β Input A of gate 2 |
| Pin 7 | 2B β Input B of gate 2 |
| Pin 8 | 2C β Input C of gate 2 |
| Pin 9 | 2D β Input D of gate 2 |
| Pin 10 | GND β Ground |
| Pin 11 | 2Y β Output Y of gate 2 |
| Pin 12 | 3A β Input A of gate 3 |
| Pin 13 | 3B β Input B of gate 3 |
| Pin 14 | 3C β Input C of gate 3 |
| Pin 15 | 3D β Input D of gate 3 |
| Pin 16 | 3Y β Output Y of gate 3 |
| Pin 17 | OE1 β Output enable for gate 1 (active low) |
| Pin 18 | OE2 β Output enable for gate 2 (active low) |
| Pin 19 | OE3 β Output enable for gate 3 (active low) |
| Pin 20 | VCC β Power supply |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
SN74AHCT3G99-Q1 is suitable for 6 applications: Automotive Body Control Module, Infotainment System, Industrial Control Unit, Networking Equipment, Test and Measurement, Portable Electronics.
Automotive Body Control Module
The SN74AHCT3G99-Q1 is ideal for automotive body control modules where configurable logic gates are needed for signal routing and custom logic functions. Its AEC-Q100 qualification ensures reliable operation in harsh automotive environments, with a wide temperature range of -40Β°C to +125Β°C. The 3-state outputs allow multiple devices to share a bus, reducing wiring complexity. The Schmitt-trigger inputs provide noise immunity against electrical interference common in vehicles. The device operates from 5V, compatible with automotive power rails. Its small TSSOP package saves board space in space-constrained modules.
Recommended
Infotainment System
In infotainment systems, the SN74AHCT3G99-Q1 provides flexible logic for audio routing, display control, and user interface management. The configurable gates can implement custom logic functions without additional discrete gates, saving cost and board space. The 3-state outputs enable bus sharing between multiple peripherals, such as audio codecs and display controllers. The Schmitt-trigger inputs ensure reliable operation with noisy signals from the vehicle's electrical system. The device's 5V operation is compatible with common infotainment power supplies. Its automotive qualification guarantees long-term reliability in the cabin environment.
Recommended
Industrial Control Unit
The SN74AHCT3G99-Q1 is suitable for industrial control units where configurable logic is required for sensor interfacing, signal conditioning, and control logic. Its wide operating temperature range and robust Schmitt-trigger inputs make it ideal for noisy industrial environments. The 3-state outputs allow multiple controllers to share a common bus, facilitating modular designs. The device's 5V operation is compatible with standard industrial logic levels. The configurable function Y = (A β’ /C + B β’ C) β D can be used for multiplexing sensor signals or implementing custom logic. The TSSOP package is easy to integrate into existing PCB designs.
Recommended
Networking Equipment
In networking equipment, the SN74AHCT3G99-Q1 can be used for signal routing, protocol handling, and custom logic functions. The 3-state outputs are essential for bus-oriented architectures, allowing multiple devices to share data lines. The Schmitt-trigger inputs provide noise immunity in high-speed digital environments. The device operates from 5V, compatible with legacy networking logic. Its configurable gates can replace multiple fixed-function gates, simplifying PCB layout and reducing component count. The automotive-grade qualification ensures reliability in demanding environments, though it is also suitable for industrial networking applications.
Recommended
Test and Measurement
The SN74AHCT3G99-Q1 is used in test and measurement equipment for signal routing, triggering, and custom logic functions. Its configurable gates allow engineers to implement specific logic functions without dedicated ICs, speeding up prototyping. The 3-state outputs enable multiple instruments to share a common bus, facilitating automated test systems. The Schmitt-trigger inputs ensure reliable triggering with slow or noisy signals. The device's 5V operation is compatible with standard test equipment logic. The wide temperature range allows use in benchtop and field instruments. The TSSOP package is suitable for compact PCB designs.
Recommended
Portable Electronics
Although automotive-grade, the SN74AHCT3G99-Q1 can be used in portable electronics where 5V logic is required and space is limited. Its small TSSOP package and low power consumption make it suitable for battery-powered devices. The configurable gates reduce component count, saving board space and cost. The 3-state outputs allow power management by disabling unused sections. The Schmitt-trigger inputs provide noise immunity in portable environments. The device operates from 4.5V to 5.5V, compatible with USB power and battery supplies. Its wide temperature range ensures operation in various conditions.
Recommended
Recommended Products Summary
Engineering reference data for SN74AHCT3G99-Q1 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | SN74AHCT3G99QPWRQ1 | SN74AHCT3G99DGSR | SN74AHC3G99-Q1 |
|---|---|---|---|---|
| Package | 20-TSSOP (PW) | 20-TSSOP (PW) | 20-TSSOP (PW) | 20-TSSOP (PW) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Supply Voltage Range | 4.5V to 5.5V | 4.5V to 5.5V | 4.5V to 5.5V | 2V to 5.5V |
| Logic Function | Y = (A β’ /C + B β’ C) β D | Y = (A β’ /C + B β’ C) β D | Y = (A β’ /C + B β’ C) β D | Y = (A β’ /C + B β’ C) β D |
| Automotive Grade | Yes (AEC-Q100) | Yes (AEC-Q100) | No | Yes (AEC-Q100) |
| Operating Temperature | -40Β°C to +125Β°C | -40Β°C to +125Β°C | -40Β°C to +85Β°C | -40Β°C to +125Β°C |
| Input Type | Schmitt-Trigger | Schmitt-Trigger | Schmitt-Trigger | Schmitt-Trigger |
| Output Type | 3-State | 3-State | 3-State | 3-State |
Key Differentiators
- Automotive-grade qualification (vs SN74AHCT3G99DGSR)
- Wider operating temperature range (vs SN74AHCT3G99DGSR)
- Schmitt-trigger inputs (vs 74AHCT3G99 (Nexperia))
Design Notes
Ensure a stable 5V supply with adequate decoupling. Place a 0.1uF ceramic capacitor close to the VCC pin and a 10uF bulk capacitor nearby. The device operates from 4.5V to 5.5V, so avoid voltage drops below 4.5V to prevent logic errors. For automotive applications, consider input power supply transients and use appropriate filtering.
Keep traces short to minimize parasitic capacitance, especially on outputs. The device is specified to drive up to 50pF loads; exceeding this may cause signal integrity issues. Use ground planes to reduce noise. For 3-state outputs, ensure OE pins are properly pulled up or down to avoid floating outputs during power-up.
Do not leave unused inputs floating; tie them to VCC or GND to avoid undefined states. The Schmitt-trigger inputs tolerate slow edges, but for best performance, use fast edges. Verify the logic function Y = (A β’ /C + B β’ C) β D matches your design intent. For automotive, follow AEC-Q100 guidelines for ESD protection.
Compliance Information
RoHS compliant per TI product page. AEC-Q100 qualified for automotive. Lead-free.
