Overview
The SN74AHCT244PWRE4 is an octal buffer/line driver integrated circuit produced by Texas Instruments. This device is part of the SNx4AHCT244 series and is designed to operate as two 4-bit buffers/line drivers with separate output-enable (OE) inputs. When the OE input is low, the device passes data from the A inputs to the Y outputs. When the OE input is high, the outputs are in the high-impedance state, which is crucial for preventing bus contention and ensuring proper device operation during power-up or power-down phases.
The SN74AHCT244PWRE4 is optimized for a 5V supply voltage and supports up-voltage translation from 3.3V to 5V, making it versatile for various digital logic applications. It also features TTL-voltage compatible inputs and slow edge rates to minimize output ringing.
Key Specifications
| Parameter | Unit | Min | Typ | Max |
|---|---|---|---|---|
| VCC (Supply Voltage) | V | 4.5 | 5 | 5.5 |
| VIH (High-level Input Voltage) | V | 2 | ||
| VIL (Low-level Input Voltage) | V | 0.8 | ||
| VOH (Output High Voltage) | V | 4.1 | ||
| VOL (Output Low Voltage) | V | 0.5 | ||
| IOH (Output High Current) | mA | -8 | ||
| IOL (Output Low Current) | mA | 8 | ||
| TA (Operating Free-Air Temperature) | °C | -40 | 125 | |
| Cpd (Power Dissipation Capacitance) | pF | 8.2 |
Key Features
- Optimized for 5V supply voltage.
- Supports up-voltage translation from 3.3V to 5V.
- TTL-voltage compatible inputs.
- Slow edge rates to minimize output ringing.
- Separate output-enable (OE) inputs for each 4-bit buffer/line driver.
- High-impedance state during power-up or power-down phases when OE is high.
Applications
- Digital logic circuits requiring buffer or line driver functions.
- Systems needing voltage translation between 3.3V and 5V logic levels.
- Bus-oriented systems where high-impedance states are necessary to prevent bus contention.
- General-purpose digital signal buffering and driving in various electronic devices.
Q & A
- What is the primary function of the SN74AHCT244PWRE4?
The primary function is to act as an octal buffer/line driver with separate output-enable inputs, allowing data to be passed from A inputs to Y outputs when OE is low, and entering a high-impedance state when OE is high.
- What is the recommended supply voltage for the SN74AHCT244PWRE4?
The device is optimized for a 5V supply voltage.
- Can the SN74AHCT244PWRE4 handle voltage translation?
- What type of input compatibility does the SN74AHCT244PWRE4 have?
The inputs are TTL-voltage compatible.
- How does the SN74AHCT244PWRE4 minimize output ringing?
It features slow edge rates to minimize output ringing.
- What is the purpose of the output-enable (OE) input?
The OE input controls whether the outputs are in the active state (OE low) or high-impedance state (OE high).
- What is the operating temperature range for the SN74AHCT244PWRE4?
The operating free-air temperature range is from -40°C to 125°C.
- What is the power dissipation capacitance of the SN74AHCT244PWRE4?
The power dissipation capacitance is typically 8.2 pF at 1 MHz with no load.
- What package types are available for the SN74AHCT244PWRE4?
The device is available in various packages including TSSOP, SOIC, PDIP, SOP, and TVSOP.
- Is the SN74AHCT244PWRE4 RoHS compliant?
