The NXP 74HCT139 is a high-speed Si-gate CMOS device that is pin compatible with Low power Schottky TTL (LSTTL). It is specifically designed for 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 chip's performance characteristics can help to eliminate the need for wait states.

This integrated circuit features two individual 2-to-4 line decoders in a single package. Each half of the 74HCT139 can be used as a function generator that's capable of providing all four minterms of two variables. These decoders accept two binary weighted inputs (nA0, nA1) and, when enabled, provide four mutually exclusive active LOW outputs (nY0 to nY3).

Key Features:

• Logic Family: HCT
• Logic Type: 2-to-4 line decoder/demultiplexer
• Supply Voltage Range: 4.5V to 5.5V
• High Noise Immunity: NIV = VNIH = VNIL = 28% VCC (min)
• Power Down Protection: Inputs and outputs
• Low Power Consumption: 20 µA (max) ICC
• Typical tpd: 15 ns
• Output Capability: Standard
• I/O Pin ESD Protection: HBM JESD22-A114E exceeds 2000V
• Multiple Package Options: SO16, TSSOP16, SSOP16

Applications:

• Memory decoding or data-routing applications
• Function generation
• Computer systems
• Instrumentation and control systems
• Digital signal processing

The 74HCT139 is designed for use in applications that require high-speed operation and can benefit from the wide noise margin and low power consumption of CMOS technology. Its robust design and industry-standard footprint make it a versatile choice for a broad array of digital applications.