Overview
The SN74ACT240PWR, produced by Texas Instruments, is an octal buffer or driver with 3-state outputs. This device is part of the ACT series, known for its high-speed and low-power CMOS logic. It is designed to enhance the performance and density of memory address drivers, clock drivers, and bus-oriented receivers and transmitters. The SN74ACT240PWR operates within a voltage range of 4.5V to 5.5V and is TTL-compatible, making it versatile for various applications.
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 Y) | ns | 1.5 | 6 | 8.5 |
| tPHL (Propagation Delay Time, A to Y) | ns | 1.5 | 5.5 | 7.5 |
| RθJA (Junction-to-Ambient Thermal Resistance) | °C/W | 60 |
Key Features
- Operation within a voltage range of 4.5V to 5.5V
- TTL-compatible inputs
- Maximum propagation delay time of 8.5ns at 5V
- Balanced CMOS push-pull outputs capable of sinking and sourcing similar currents
- 3-state outputs with output enable (OE) inputs
- High latch-up performance exceeding 250mA per JESD 17
Applications
- Handsets: smartphones
- Network switches
- Health and fitness or wearables
- Televisions
- Power infrastructures
Q & A
- What is the operating voltage range of the SN74ACT240PWR?
The operating voltage range is 4.5V to 5.5V.
- What is the maximum propagation delay time at 5V?
The maximum propagation delay time is 8.5ns.
- Are the inputs TTL-compatible?
Yes, the inputs are TTL-compatible.
- What is the thermal resistance for the TSSOP package?
The junction-to-ambient thermal resistance for the TSSOP package is 60°C/W.
- How do the 3-state outputs work?
The 3-state outputs are controlled by the output enable (OE) inputs. When OE is low, the device passes inverted data from the A inputs to the Y outputs. When OE is high, the outputs are in the high-impedance state.
- What are the typical applications of the SN74ACT240PWR?
Typical applications include handsets, network switches, health and fitness devices, and power infrastructures.
- What is the latch-up performance of the device?
The latch-up performance exceeds 250mA per JESD 17.
- How should unused inputs be handled?
All unused inputs must be held at VCC or GND to ensure proper device operation.
- What is the maximum low-level output current?
The maximum low-level output current is 24 mA.
- What is the operating free-air temperature range?
The operating free-air temperature range is -40°C to 85°C.
