Overview
The SN74ACT245PWRG4 is an octal bus transceiver with 3-state outputs, designed and manufactured by Texas Instruments. This component is part of the SNx4ACT245 family and is intended for asynchronous two-way communication between data buses. It features a control-function implementation that minimizes external timing requirements, making it suitable for a variety of bus interface applications where output ringing is a concern.
Key Specifications
| Parameter | Unit | Min | Typ | Max |
|---|---|---|---|---|
| VCC Supply Voltage | V | 4.5 | - | 5.5 |
| VIH High-Level Input Voltage | V | 2 | - | - |
| VIL Low-Level Input Voltage | V | 0.8 | - | - |
| IOH High-Level Output Current | mA | -24 | - | - |
| IOL Low-Level Output Current | mA | 24 | - | - |
| TA Operating Free-Air Temperature | °C | -40 | - | 85 |
| tPLH Propagation Delay Time (A to B or B to A) | ns | 1 | 4 | 7.5 |
| tPHL Propagation Delay Time (A to B or B to A) | ns | 1 | 4 | 8 |
| tPZH Output Enable Time to High Impedance | ns | 1 | 5 | 10 |
| tPZL Output Enable Time to Low Impedance | ns | 1 | 5.5 | 10 |
Key Features
- VCC operation range of 4.5V to 5.5V
- Inputs accept voltages up to 5.5V
- Maximum propagation delay time of 8ns at 5V
- TTL-voltage compatible inputs
- Low-drive CMOS device to minimize output ringing
- Slow edge rates to reduce overshoot and undershoot
- Non-inverting bidirectional buffers with 3-state outputs
- Output enable input to place outputs in high-impedance state
- Current sinking capability of 24 mA at both A and B ports
- Pb-free packages available
Applications
- Pro Audio
- Video and Signage
- Appliances
- Factory Automation and Control
- Bus interface applications where output ringing is a concern
Q & A
- What is the operating voltage range of the SN74ACT245PWRG4?
The operating voltage range is from 4.5V to 5.5V.
- What is the maximum propagation delay time of the SN74ACT245PWRG4 at 5V?
The maximum propagation delay time is 8ns.
- Are the inputs of the SN74ACT245PWRG4 TTL-voltage compatible?
- How does the output enable (OE) pin function on the SN74ACT245PWRG4?
The output enable (OE) pin, when high, disables both A and B ports by placing them in a high-impedance state.
- What is the current sinking capability of the SN74ACT245PWRG4 at both A and B ports?
The current sinking capability is 24 mA at both A and B ports.
- What types of packages are available for the SN74ACT245PWRG4?
The component is available in various packages including TSSOP, SOIC, PDIP, SOP, SSOP, and VQFN.
- Is the SN74ACT245PWRG4 Pb-free?
- What are some common applications of the SN74ACT245PWRG4?
- How does the SN74ACT245PWRG4 minimize output ringing?
- What is the operating temperature range of the SN74ACT245PWRG4?
