Dual 2-to-4 line Decoder/Demultiplexer IC - 74HC139
Dual 2-to-4 line Decoder/Demultiplexer IC - 74HC139 The 74HC Series 74HC139 comprises two separate two-line-to-four-line decoders in a single package. The active-low enable input can be used as a data line in demultiplexing applications. All of these decoders/demultiplexers feature fully buffered inputs, presenting only one normalized load to its driving circuit. All inputs are clamped with high-performance Schottky diodes to suppress line-ringing and simplify system design. These Schottky-clamped circuits are designed to be used in high-performance memory-decoding or data-routing applications, requiring very short propagation delay times. In high-performance memory systems, these decoders can be used to minimize the effects of system decoding. When used with high-speed memories, the delay times of these decoders are usually less than the typical access time of the memory. This means that the effective system delay introduced by the decoder is negligible. Pinout: Pinout Of 74HC139 IC Symbol Pin Description 1E, 2E 1, 15 enable input (active LOW) 1A0, 1A1 2, 3 address input 1Y0, 1Y1, 1Y2, 1Y3 4, 5, 6, 7 output (active LOW) GND 8 ground (0 V) 2Y0, 2Y1, 2Y2, 2Y3 12, 11, 10, 9 output (active LOW) 2A0, 2A1 14, 13 address input VCC 16 positive supply voltage Also check 4 Bit D-Latch 74LS75 IC . It's a small, 16-pin integrated circuit (IC) chip that stores 4 bits of digital data. It's commonly used in digital circuits for data storage, timing control, and logic functions.
- Designed specifically for high speed: Memory decoders Data transmission systems
- 74LS139 contains two fully independent 2-to-4-line decoders/demultiplexers
- Schottky clamped for high performance
- Typical propagation delay (3 levels of logic) is 21 ns
- Typical power dissipation is 34 mW
- Supply Voltage (VCC) 7 V
- Input Voltage (VI) 7 V
- Operating free-air temperature range 0°C to +70°C
- Storage temperature range –65°C to +150°C