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Description: 1. The 74HC540 is an octal (8-pin) 3-state inverting buffer IC from the Hex Inverter with Open-Drain Outputs (74HC04) family by Texas Instruments. It allows users to control input-output (I/O) lines based on three states: high, low, or tri-stated (high impedance). 2. Features: This IC has eight inverting buffers with open-drain outputs that can be controlled via an enable pin (EN), allowing external circuits to control the output state. The 74HC540 is designed for high-frequency applications and has a typical power consumption of 1.3mW per gate at 5V supply voltage. 3. Applications: This IC is commonly used in digital logic design, data conversion interfaces, and communication systems where controlling the output state based on input signals or external control signals is essential. It can be employed to interface TTL (Transistor-Transistor Logic) or CMOS (Complementary Metal–Oxide–Semiconductor) circuits in various digital designs. 4. Input Characteristics: The 74HC540 input pins
| Specification | Details |
|---|---|
| Manufacturer | NXP (or equivalent) |
| IC Type | Octal 3-State Inverting Buffer |
| Package | DIP-16 or SO-16 (depending on variant) |
| Supply Voltage | 2V to 6V |
| Max Frequency | 54 MHz |
| Propagation Delay | 7 ns |
| Power Dissipation | 0.4 mW (Typical) |
| Input High Voltage | 2V to VCC |
| Input Low Voltage | 0.8V to VSS |
| Output Low Current | -24 mA (at VCC = 6V VOUT = 0.5V) |
| Output High Current | 24 mA (at VCC = 6V VOUT = 2.4V) |
| Bus Holding Current | ±1 mA |
| Temperature Range | -40°C to +125°C |
| Number of Pins | 16 |
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