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Specifications
SKU: 956258
Octal buffer, line driver; 3-state - Description: Octal Buffer/Line Driver; Non-Inverting 3-State ; Logic switching levels: CMOS ; Number of pins: 20 ; Output drive capability: +/- 7.8 mA ; Power dissipation considerations: Low Power or Battery Applications ; Propagation delay: 9@5V ns; Voltage: 2.0-6.0 V
Below is the parameter table and instructions for the 74HC240AP:
74HC240AP Parameter Table
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions |
|---|---|---|---|---|---|---|
| Supply Voltage | VCC | 2.0 | 5.0 | 6.0 | V | |
| Input Low Voltage | VIL | 0.0 | 0.8 | 1.5 | V | VCC = 4.5V to 5.5V |
| Input High Voltage | VIH | 3.5 | 4.2 | 5.0 | V | VCC = 4.5V to 5.5V |
| Output Low Voltage | VOL | 0.0 | 0.1 | 0.2 | V | IOL = -4 mA |
| Output High Voltage | VOH | 4.8 | 4.9 | 5.0 | V | IOH = 4 mA |
| Input Leakage Current | IIL | -1.0 | 1.0 | μA | VCC = 4.5V to 5.5V | |
| Output Leakage Current | IOL | -1.0 | 1.0 | μA | VCC = 4.5V to 5.5V | |
| Propagation Delay Time | tpd | 5.0 | 10.0 | 18.0 | ns | VCC = 4.5V to 5.5V, TA = 25°C |
| Power Dissipation per Gate | Pgate | 0.0 | 0.5 | 1.0 | mW | VCC = 4.5V to 5.5V |
| Operating Temperature Range | TA | -40 | 85 | °C |
74HC240AP Instructions
Pin Configuration:
- VCC: Power supply voltage.
- GND: Ground.
- OE (Output Enable): Active low input to enable or disable all outputs.
- A1-A8, B1-B8: Input and output pins for the 8 bidirectional buffers.
Operation:
- The 74HC240AP is a high-speed CMOS octal bus transceiver with three-state outputs.
- When OE is low, the buffers are enabled, and data can be transferred from A to B or B to A.
- When OE is high, all outputs are in a high-impedance state, effectively disconnecting them from the bus.
Power Supply:
- Connect VCC to a power supply between 2.0V and 6.0V.
- Connect GND to the ground.
Input/Output Handling:
- Ensure that input voltages do not exceed the supply voltage range.
- Use appropriate pull-up or pull-down resistors if necessary to ensure stable logic levels.
Propagation Delay:
- The propagation delay time (tpd) is the time it takes for a change in the input signal to appear at the output. It is typically between 5.0 ns and 18.0 ns.
Temperature Considerations:
- The device is designed to operate over a temperature range of -40°C to 85°C.
Storage and Handling:
- Store the device in a dry, static-free environment.
- Handle with care to avoid damage to the pins and internal components.
Applications:
- Bus interfacing and data transfer in digital systems.
- Bidirectional communication between different parts of a system.
By following these instructions and parameters, you can effectively use the 74HC240AP in your digital circuits.
(For reference only)Inquiry - 74HC240AP
