Overview
The 74HC540DTR2G is an octal buffer/line driver integrated circuit produced by onsemi, although it is now obsolete and no longer manufactured. This device is part of the 74HC series, known for its high-speed CMOS logic. It features 3-state outputs and is designed for inverting buffer applications.
The 74HC540 is characterized by its wide supply voltage range, low power dissipation, and high noise immunity, making it suitable for a variety of digital logic applications.
Key Specifications
| Parameter | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply Voltage (VCC) | 2.0 | 6.0 | V | ||
| Input Voltage (VI) | 0 | VCC | V | ||
| LOW-level Output Voltage (VOL) | IO = 7.8 mA; VCC = 6.0 V | 0.16 | 0.4 | V | |
| HIGH-level Output Voltage (VOH) | IO = -20 μA; VCC = 4.5 V to 5.5 V | 4.4 | 4.5 | V | |
| Input Leakage Current (II) | VI = VCC or GND; VCC = 6.0 V | ±0.1 | ±1.0 | μA | |
| OFF-state Output Current (IOZ) | VI = VIH or VIL; VCC = 6.0 V; VO = VCC or GND | ±0.5 | ±10 | μA | |
| Supply Current (ICC) | VI = VCC or GND; IO = 0 A; VCC = 6.0 V | 8.0 | 160 | μA | |
| Input Capacitance (CI) | 3.5 | pF | |||
| Propagation Delay (tpd) | VCC = 4.5 V; CL = 50 pF | 11 | 20 | 25 | ns |
Key Features
- Wide Supply Voltage Range: From 2.0 V to 6.0 V, making it versatile for various applications.
- CMOS Low Power Dissipation: Reduces power consumption, ideal for battery-powered devices.
- High Noise Immunity: Ensures reliable operation in noisy environments.
- 3-State Outputs: Allows outputs to be set to a high-impedance state, useful for bus applications.
- Inverting Outputs: Provides inverted logic signals.
- Input Levels: Compatible with CMOS and TTL input levels (74HC540 and 74HCT540 respectively).
- ESD Protection: Human Body Model (HBM) ESD protection.
- Latch-Up Performance: Exceeds 100 mA per JESD 78 Class II Level B.
Applications
- Buffering and Line Driving: Ideal for driving long cables or lines due to its high current drive capability.
- Digital Logic Circuits: Used in various digital logic applications requiring inverting buffers.
- Bus Systems: The 3-state outputs make it suitable for use in bus systems where multiple devices need to share the same line.
- Interface Circuits: Can be used to interface between different logic families due to its compatibility with CMOS and TTL levels.
Q & A
- What is the supply voltage range of the 74HC540DTR2G?
The supply voltage range is from 2.0 V to 6.0 V.
- Is the 74HC540DTR2G still in production?
No, the 74HC540DTR2G is obsolete and no longer manufactured.
- What type of outputs does the 74HC540DTR2G have?
The device has 3-state inverting outputs.
- What are the input levels compatible with the 74HC540DTR2G?
The 74HC540 is compatible with CMOS input levels, while the 74HCT540 is compatible with TTL input levels.
- Does the 74HC540DTR2G have ESD protection?
- What is the propagation delay of the 74HC540DTR2G?
The propagation delay is typically 20 ns at VCC = 4.5 V and CL = 50 pF.
- Can the 74HC540DTR2G be used in bus systems?
- What is the latch-up performance of the 74HC540DTR2G?
- What are some common applications of the 74HC540DTR2G?
- Are there any substitutes available for the 74HC540DTR2G?
