Overview
The SN74AHCT245PW is an octal bus transceiver with 3-state outputs, manufactured by Texas Instruments. This component is designed for asynchronous two-way communication between data buses, allowing data transmission from the A bus to the B bus or vice versa, based on the logic level at the direction-control (DIR) input. The device operates within a voltage range of 4.5 V to 5.5 V and is optimized for 5 V operation, making it suitable for various digital signal processing applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Supply | 4.5 V to 5.5 V | V |
| Operating Temperature | -40°C to 125°C | °C |
| Package | 20-TSSOP (0.173", 4.40mm Width) | |
| Logic Type | Transceiver, Non-Inverting | |
| Number of Bits per Element | 8 | |
| Output Type | Push-Pull | |
| Current - Output High, Low | 8 mA, 8 mA | mA |
| Mounting Type | Surface Mount | |
| Propagation Delay (Typical) | 4.5 ns to 10 ns | ns |
Key Features
- Inputs are TTL-voltage compatible.
- Latch-up performance exceeds 250 mA per JESD 17.
- Allows up voltage translation from 3.3 V to 5 V; inputs accept VIH levels of 2 V.
- Slow edge rates minimize output ringing.
- The output-enable (OE) input can be used to disable the device, effectively isolating the buses.
- High-impedance state during power up or power down when OE is tied to VCC through a pullup resistor.
Applications
- Enable or disable a digital signal.
- Hold a signal during a controller reset.
- Debounce a switch.
Q & A
- What is the operating voltage range of the SN74AHCT245PW?
The operating voltage range is from 4.5 V to 5.5 V.
- What is the package type of the SN74AHCT245PW?
The package type is 20-TSSOP (0.173", 4.40mm Width).
- What is the logic type of the SN74AHCT245PW?
The logic type is Transceiver, Non-Inverting.
- How many bits per element does the SN74AHCT245PW support?
The device supports 8 bits per element.
- What is the typical propagation delay of the SN74AHCT245PW?
The typical propagation delay ranges from 4.5 ns to 10 ns.
- Can the SN74AHCT245PW perform voltage translation?
Yes, it allows up voltage translation from 3.3 V to 5 V.
- How does the output-enable (OE) input function?
The OE input can be used to disable the device, effectively isolating the buses.
- What are some common applications of the SN74AHCT245PW?
Common applications include enabling or disabling a digital signal, holding a signal during a controller reset, and debouncing a switch.
- What is the operating temperature range of the SN74AHCT245PW?
The operating temperature range is from -40°C to 125°C.
- Is the SN74AHCT245PW RoHS compliant?
Yes, the SN74AHCT245PW is RoHS compliant.
