Overview
The MC74VHC245DWG is an advanced high-speed CMOS octal bus buffer/transceiver manufactured by onsemi. It is designed for two-way asynchronous communication between data buses and is fabricated with silicon gate CMOS technology. This device achieves high-speed operation similar to equivalent Bipolar Schottky TTL while maintaining the low power dissipation characteristic of CMOS technology. The direction of data transmission is controlled by the DIR input, and the output enable pin (OE) allows the device to be disabled, effectively isolating the buses.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC (Supply Voltage) | 2 | - | 5.5 | V |
| VIH (Minimum High-Level Input Voltage) | - | - | 5.5 | V |
| VIL (Maximum Low-Level Input Voltage) | 0 | - | 1.5 | V |
| tPD (Propagation Delay) | - | 4.0 | - | ns |
| ICC (Quiescent Current) | - | - | 4 | μA |
| CPD (Power Dissipation Capacitance) | - | 21 | - | pF |
| VOLP (Quiet Output Maximum Dynamic) | - | 0.9 | 1.2 | V |
| Operating Temperature Range | -40 | - | 85 | °C |
Key Features
- High Speed Operation: Achieves propagation delays as low as 4.0 ns at VCC = 5 V.
- Low Power Dissipation: Quiescent current of 4 μA (max) at TA = 25°C.
- High Noise Immunity: VNIH = VNIL = 28% VCC.
- Power Down Protection: Provided on inputs.
- Balanced Propagation Delays.
- Designed for 2 V to 5.5 V Operating Range.
- Low Noise: VOLP = 1.2 V (max).
- Pin and Function Compatible with Other Standard Logic Families.
- Latchup Performance Exceeds 300 mA.
- ESD Performance: HBM > 2000 V; Machine Model > 200 V.
- Pb-Free and RoHS Compliant.
Applications
The MC74VHC245DWG is suitable for various applications requiring high-speed data transmission and low power consumption. These include:
- Automotive Systems: For high-speed data communication in automotive environments.
- Communications: In telecommunications and networking equipment.
- Computing: For high-speed data transfer in computing systems.
- Industrial Control Systems: Where reliable and fast data transmission is critical.
- Consumer Electronics: In devices requiring low power and high-speed data handling.
Q & A
- What is the primary function of the MC74VHC245DWG?
The MC74VHC245DWG is an octal bus buffer/transceiver designed for two-way asynchronous communication between data buses.
- What is the typical propagation delay of the MC74VHC245DWG at VCC = 5 V?
The typical propagation delay is 4.0 ns at VCC = 5 V.
- What is the operating voltage range of the MC74VHC245DWG?
The device operates within a voltage range of 2 V to 5.5 V.
- How is the direction of data transmission controlled in the MC74VHC245DWG?
The direction of data transmission is controlled by the DIR input.
- What is the purpose of the OE (Output Enable) pin?
The OE pin can be used to disable the device, effectively isolating the buses.
- Is the MC74VHC245DWG protected against static discharge?
Yes, all inputs are equipped with protection circuits against static discharge.
- What are the package options available for the MC74VHC245DWG?
The device is available in SOIC-20 and TSSOP-20 packages.
- Is the MC74VHC245DWG RoHS compliant?
Yes, the device is Pb-Free and RoHS compliant.
- What is the maximum latchup performance of the MC74VHC245DWG?
The latchup performance exceeds 300 mA.
- What are the ESD performance ratings of the MC74VHC245DWG?
The ESD performance ratings are HBM > 2000 V and Machine Model > 200 V.
