Overview
The MC74VHCT125ADR2G is a high-speed CMOS quad bus buffer fabricated with silicon gate CMOS technology. It is part of the MC74VHCT125A series produced by onsemi. This device achieves high-speed operation similar to equivalent Bipolar Schottky TTL while maintaining the low power dissipation characteristic of CMOS technology. The MC74VHCT125A requires the 3-state control input (OEbar) to be set High to place the output into the high impedance state, making it versatile for various logic applications. It is also capable of acting as a level converter for interfacing 3.3V to 5.0V systems due to its full 5V CMOS level output swings.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC (DC Supply Voltage) | 2.0 | - | 5.5 | V |
| VIN (DC Input Voltage) | 0 | - | 5.5 | V |
| VOUT (DC Output Voltage) | 0 | - | VCC + 0.5 | V |
| VIH (High-Level Input Voltage) | 2.0 | - | 3.85 | V |
| VIL (Low-Level Input Voltage) | 0.5 | - | 1.65 | V |
| VOH (High-Level Output Voltage) | 1.9 | - | 4.4 | V |
| VOL (Low-Level Output Voltage) | 0 | - | 0.52 | V |
| tPD (Propagation Delay) | - | 3.8 ns | - | ns |
| ICC (Quiescent Supply Current) | - | - | 4 μA | μA |
| TA (Operating Temperature) | -55 | - | 125 | °C |
Key Features
- High Speed: Propagation delay of 3.8 ns (Typ) at VCC = 5 V.
- Low Power Dissipation: Quiescent supply current of 4 μA (Max) at TA = 25°C.
- TTL-Compatible Inputs: Inputs compatible with TTL levels, with VIH = 2.0 V and VIL = 0.8 V.
- Power Down Protection: Provided on inputs to prevent device destruction due to supply voltage - input/output voltage mismatch, battery backup, hot insertion, etc..
- Balanced Propagation Delays: Ensures consistent signal timing.
- Wide Operating Range: Designed for operation from 2 V to 5.5 V.
- High Noise Immunity: VNIH = VNIL = 28% VCC).
- ESD Protection: Human Body Model > 2000 V).
Applications
- Level Conversion: Can be used to interface 3.3 V to 5.0 V systems due to its full 5 V CMOS level output swings).
- Bus Buffering: Suitable for buffering signals in high-speed digital systems).
- Logic Circuits: Used in various logic circuits requiring high speed and low power consumption).
- Embedded Systems: Can be integrated into embedded systems that require reliable and efficient signal buffering).
Q & A
- What is the typical propagation delay of the MC74VHCT125A?
The typical propagation delay is 3.8 ns at VCC = 5 V).
- What are the input voltage levels compatible with the MC74VHCT125A?
The inputs are compatible with TTL levels, with VIH = 2.0 V and VIL = 0.8 V).
- What is the operating temperature range of the MC74VHCT125A?
The operating temperature range is from -55°C to 125°C).
- Does the MC74VHCT125A provide power down protection?
- What is the maximum quiescent supply current of the MC74VHCT125A?
The maximum quiescent supply current is 4 μA at TA = 25°C).
- Can the MC74VHCT125A be used as a level converter?
- What is the ESD protection rating of the MC74VHCT125A?
The ESD protection rating is > 2000 V according to the Human Body Model).
- How many stages are in the internal circuit of the MC74VHCT125A?
The internal circuit is composed of three stages, including a buffer output).
- What is the maximum input voltage tolerance of the MC74VHCT125A?
The inputs tolerate voltages up to 5.5 V).
- Is the MC74VHCT125A pin and function compatible with other standard logic families?
