The HD74HC139FPEL-E is a high-speed CMOS logic device belonging to the HC (High-speed CMOS) family. It is a Dual 2-to-4 Line Decoder/Demultiplexer manufactured by Renesas Electronics. This device accepts two binary weighted address inputs (A0 and A1) and enables one of the four outputs (Y0 to Y3), depending on the address applied. The device features separate enable inputs (1G and 2G), which are active LOW. When the enable input is HIGH, all outputs are forced HIGH.

Applications

• Memory decoding and addressing.
• Data routing and distribution.
• Implementation of combinational logic functions.
• Microprocessor-based systems for peripheral selection.
• Digital systems requiring address decoding.

Features

• High Speed Operation: tpd = 13 ns (typ.) at VCC = 5V.
• High Output Drive Current: Outputs can drive 10 LSTTL Loads.
• Wide Operating Voltage Range: VCC = 2V to 6V.
• Low Power Consumption: ICC = 4 μA (max.) at VCC = 6V.
• Input Protection: All inputs are protected against static discharge.
• Dual Configuration: Contains two independent 2-to-4 line decoders/demultiplexers in a single package.
• Active LOW Enables: Provide easy cascading for larger decoding applications.

Benefits

• Increased System Performance: High-speed operation reduces propagation delays, improving overall system performance.
• Versatile Applications: Can be used in various applications, including memory decoding, data routing, and combinational logic implementation.
• Reduced Component Count: Dual configuration allows for implementing two decoding functions with a single chip, reducing board space and cost.
• Simplified System Design: Active LOW enables simplify cascading and expansion for larger decoding applications.
• Improved System Reliability: Input protection ensures reliable operation in noisy environments.

Additional Details:

The HD74HC139FPEL-E is supplied in a SOP16 (Small Outline Package) which is suitable for surface mount technology. The operating temperature range is -40°C to +85°C. The device’s inputs are compatible with both TTL and CMOS logic levels, enhancing its compatibility with different system architectures. The enable inputs are especially useful for memory chip selection, allowing multiple memory devices to share the same address bus. The high output drive capability enables it to directly drive a number of standard logic gates without requiring additional buffering. The CMOS technology ensures very low power consumption which is critical in battery powered and energy efficient applications. Each decoder section has two data inputs (A0, A1), two outputs enable pins (1G, 2G) and four mutually exclusive outputs (Y0-Y3). By using enable lines the device can be used as a single demultiplexer, which is a circuit that connects one input line to one of n output lines.