Overview
The MC74VHC138DTR2G is an advanced high-speed CMOS 3-to-8 decoder fabricated with silicon gate CMOS technology. It achieves high-speed operation similar to equivalent Bipolar Schottky TTL while maintaining CMOS low power dissipation. When the device is enabled, three binary select inputs (A0 - A2) determine which one of the outputs (Y0 - Y7) will go Low. The device includes enable inputs (E3, E2bar, and E1bar) to ease cascade connection and for use as an address decoder for memory systems.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Propagation Delay (tPD) | - | 5.7 | 10.1 | ns |
| Operating Voltage (VCC) | 2 | - | 5.5 | V |
| Input Voltage Tolerance | - | - | 7 | V |
| Low Power Dissipation (ICC) | - | - | 4 | μA |
| Noise Immunity (VNIH, VNIl) | - | - | 28% VCC | - |
| Output Low Voltage (VOLP) | - | - | 0.8 | V |
| ESD Performance (HBM) | - | - | > 2000 | V |
| ESD Performance (Machine Model) | - | - | > 200 | V |
| Latchup Performance | - | - | > 300 | mA |
| Package Type | - | - | TSSOP-16 | - |
Key Features
- High Speed: Achieves propagation delays similar to Bipolar Schottky TTL.
- Low Power Dissipation: Maximum ICC of 4 μA at 25°C.
- High Noise Immunity: VNIH and VNIl of 28% VCC.
- Power Down Protection: Provided on inputs.
- Balanced Propagation Delays.
- Operating Range: 2 V to 5.5 V.
- Low Noise: VOLP of 0.8 V (Max).
- Pin and Function Compatible with Other Standard Logic Families.
- ESD Performance: HBM > 2000 V, Machine Model > 200 V.
- Latchup Performance Exceeds 300 mA.
- Pb-Free and RoHS Compliant.
Applications
- Memory Systems: Used as an address decoder.
- Data Transmission Systems: For decoding and multiplexing data.
- Digital Circuits: In various digital logic circuits requiring high-speed decoding.
- Embedded Systems: For address decoding and control logic.
- Communication Equipment: For high-speed data processing and decoding.
Q & A
- What is the MC74VHC138DTR2G?
The MC74VHC138DTR2G is a high-speed CMOS 3-to-8 decoder fabricated with silicon gate CMOS technology.
- What is the typical propagation delay of the MC74VHC138DTR2G?
The typical propagation delay (tPD) is 5.7 ns at VCC = 5 V.
- What is the operating voltage range of the MC74VHC138DTR2G?
The operating voltage range is from 2 V to 5.5 V.
- What is the maximum low power dissipation of the MC74VHC138DTR2G?
The maximum low power dissipation (ICC) is 4 μA at 25°C.
- How does the MC74VHC138DTR2G handle noise immunity?
The device has high noise immunity with VNIH and VNIl of 28% VCC.
- What is the ESD performance of the MC74VHC138DTR2G?
The ESD performance is HBM > 2000 V and Machine Model > 200 V.
- Is the MC74VHC138DTR2G Pb-Free and RoHS compliant?
Yes, the device is Pb-Free and RoHS compliant.
- What package types are available for the MC74VHC138DTR2G?
The device is available in TSSOP-16 and SOIC-16 packages.
- How does the MC74VHC138DTR2G support cascade connections?
The device includes enable inputs (E3, E2bar, and E1bar) to ease cascade connections.
- What are some common applications of the MC74VHC138DTR2G?
Common applications include memory systems, data transmission systems, digital circuits, embedded systems, and communication equipment.
