Overview
The SN74AHCT1G125-Q1, produced by Texas Instruments, is a single bus buffer gate/line driver with a 3-state output. This component is specifically designed for automotive applications and operates within a voltage range of 3V to 5.5V. It features low power consumption, high-speed operation, and TTL-voltage compatible inputs. The device is available in several package types, including DBV (SOT-23), DCK (SC70), and DTX (X2SON), making it versatile for various design needs.
Key Specifications
| Parameter | Test Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| VCC Operating Range | 3 | 5.5 | V | ||
| Output Drive at 5V | IOH = –8 mA | 3.94 | 3.66 | V | |
| Propagation Delay (tPLH) at VCC = 5V | CL = 15 pF | 5.6 | 8 | 12 | ns |
| Propagation Delay (tPHL) at VCC = 5V | CL = 15 pF | 5.6 | 8 | 12 | ns |
| Output Enable Time (tPZH) at VCC = 5V | CL = 15 pF | 6.5 | 9.7 | 14.5 | ns |
| Input Current (II) | VI = 5.5 V or GND | ±0.1 | ±1 | µA | |
| Supply Current (ICC) | VI = VCC or GND, OE high or low | 1 | 10 | µA | |
| Operating Temperature Range | –40 | 125 | °C |
Key Features
- Qualified for automotive applications
- Operating range of 3V to 5.5V
- Maximum propagation delay of 6ns at 5V
- Low power consumption, with a maximum supply current (ICC) of 10µA
- ±8-mA output drive at 5V
- Inputs are TTL-voltage compatible
- 3-state output, which can be disabled by the output-enable (OE) input
Applications
- Enable or disable a digital signal
- Controlling an indicator LED
- Translation between communication modules and system controllers
- Direct control of the RESET pin of a motor controller
Q & A
- What is the operating voltage range of the SN74AHCT1G125-Q1?
The operating voltage range is from 3V to 5.5V.
- What is the maximum propagation delay at 5V?
The maximum propagation delay at 5V is 12ns.
- How much current does the SN74AHCT1G125-Q1 consume?
The maximum supply current (ICC) is 10µA.
- What is the output drive capability at 5V?
The output drive capability at 5V is ±8 mA.
- Are the inputs TTL-voltage compatible?
- How does the output-enable (OE) input affect the output?
The output is disabled when the OE input is high, and true data is passed from the A input to the Y output when OE is low.
- What are the package options for the SN74AHCT1G125-Q1?
The device is available in DBV (SOT-23), DCK (SC70), and DTX (X2SON) packages.
- What is the recommended bypass capacitor for the power supply?
A 0.1-μF capacitor is recommended, and it is acceptable to parallel multiple bypass capacitors to reject different frequencies of noise.
- Why is it important to connect unused inputs to a logic level?
Unused inputs must be connected to a logic high or logic low voltage to prevent them from floating and causing undefined operational states.
- What is the operating temperature range of the SN74AHCT1G125-Q1?
The operating temperature range is from –40°C to 125°C.
