Overview
The CD74AC138M96 is a 3-Line to 8-Line Decoder/Demultiplexer produced by Texas Instruments. This device is designed for high-performance memory-decoding and data-routing applications, particularly where very short propagation-delay times are crucial. It features balanced noise immunity, high-speed operation, and reduced power consumption, making it suitable for demanding digital systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range | 1.5 to 5.5 | V |
| Input Clamp Current | ±20 | mA |
| Output Clamp Current | ±50 | mA |
| Continuous Output Current | ±50 | mA |
| Storage Temperature Range | -65 to 150 | °C |
| Junction-to-Ambient Thermal Resistance (SOIC) | 106.6 | °C/W |
| Propagation Delay Time (A, B, C to Any Y) | 2.8 to 11 | ns |
| Output Drive Current (High-Level) | -24 | mA |
| Output Drive Current (Low-Level) | 24 | mA |
| Package Type | SOIC (D) | |
| Package Size | 9.9mm × 6mm |
Key Features
- Operates over a wide voltage range of 1.5V to 5.5V with balanced noise immunity at 30% of the supply voltage.
- High-speed operation with significantly reduced power consumption.
- Designed for high-speed memory decoders and data-transmission systems.
- Incorporates three enable inputs to simplify cascading and/or data reception.
- Balanced propagation delays.
- ±24mA output drive current with fanout to 15 F devices.
- SCR-latchup-resistant CMOS process and circuit design.
- Exceeds 2kV ESD protection per MIL-STD-883, method 3015.
Applications
The CD74AC138M96 is particularly useful in high-performance memory systems where short propagation-delay times are essential. It can be used in various applications such as:
- High-speed memory decoding.
- Data-routing systems.
- Minimizing system decoding effects in memory systems.
- Cascading and data reception in digital circuits.
Q & A
- What is the voltage range for the CD74AC138M96?
The CD74AC138M96 operates over a voltage range of 1.5V to 5.5V.
- What is the propagation delay time for this device?
The propagation delay time ranges from 2.8 to 11 ns.
- What is the output drive current of the CD74AC138M96?
The output drive current is ±24 mA.
- What type of package is available for the CD74AC138M96?
The device is available in a SOIC (D) package.
- What are the dimensions of the SOIC package?
The SOIC package dimensions are 9.9mm × 6mm.
- What is the thermal resistance of the SOIC package?
The junction-to-ambient thermal resistance for the SOIC package is 106.6 °C/W.
- Is the CD74AC138M96 ESD protected?
Yes, it exceeds 2kV ESD protection per MIL-STD-883, method 3015.
- What are the storage temperature limits for this device?
The storage temperature range is -65°C to 150°C.
- How should unused inputs be handled on the CD74AC138M96?
Unused inputs must be held at VCC or GND to ensure proper device operation.
- What are the power supply recommendations for this device?
A good bypass capacitor (e.g., 0.1μF) should be used near the power terminal to prevent power disturbances.
