Overview
The CD74HC139M96 is a high-speed CMOS logic dual 2-to-4 line decoder/demultiplexer produced by Texas Instruments. This device is part of the HC (High-Speed CMOS) logic family and is designed for multifunction capability, serving as either a binary to 1 of 4 decoder or a 1 to 4 line demultiplexer. It features two independent decoders, each with a single active low enable input, making it versatile for various digital circuit applications. Although the device has been discontinued, it remains relevant for legacy systems and educational purposes.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Operating Temperature Range | -55°C to 125°C | °C |
| Supply Voltage Range (HC Types) | 2V to 6V | V |
| Supply Voltage Range (HCT Types) | 4.5V to 5.5V | V |
| Propagation Delay (A0, A1 to Outputs) at VCC=5V | 29ns to 44ns | ns |
| Propagation Delay (Enable to Outputs) at VCC=5V | 27ns to 41ns | ns |
| Input Leakage Current | ±1µA | µA |
| Quiescent Device Current | 8µA to 160µA | µA |
| Output Source/Sink Current per Pin | ±25mA | mA |
| Package Type | SOIC | |
| Pins | 16 |
Key Features
- Multifunction capability: Can be used as a binary to 1 of 4 decoder or a 1 to 4 line demultiplexer.
- Active low mutually exclusive outputs.
- Wide operating temperature range: -55°C to 125°C.
- Balanced propagation delay and transition times.
- Significant power reduction compared to LSTTL logic ICs.
- HC types: 2V to 6V operation with high noise immunity.
- HCT types: 4.5V to 5.5V operation with direct LSTTL input logic compatibility.
- CMOS input compatibility with low input leakage current (≤1µA).
Applications
- Memory decoding and data routing.
- Code conversion.
- Digital circuit design where decoding or demultiplexing is required.
- Legacy systems and educational projects.
Q & A
- What is the primary function of the CD74HC139M96?
The primary function is to act as a dual 2-to-4 line decoder or demultiplexer. - What are the operating temperature and voltage ranges for the CD74HC139M96?
The operating temperature range is -55°C to 125°C, and the supply voltage range for HC types is 2V to 6V, while for HCT types it is 4.5V to 5.5V. - What is the propagation delay for the CD74HC139M96?
The propagation delay from select inputs to outputs at VCC=5V is between 29ns and 44ns. - What is the input leakage current of the CD74HC139M96?
The input leakage current is ±1µA. - What is the quiescent device current for the CD74HC139M96?
The quiescent device current ranges from 8µA to 160µA. - What package types are available for the CD74HC139M96?
The device is available in SOIC (Small Outline Integrated Circuit) packages. - How many pins does the CD74HC139M96 have?
The device has 16 pins. - Is the CD74HC139M96 still in production?
No, the CD74HC139M96 has been discontinued by Texas Instruments. - What are some common applications of the CD74HC139M96?
Common applications include memory decoding, data routing, code conversion, and digital circuit design. - What is the significance of the 'HC' and 'HCT' in the device name?
'HC' stands for High-Speed CMOS, and 'HCT' stands for High-Speed CMOS with TTL input compatibility.
