The HD74HC138TELL-E is a high-speed CMOS 3-to-8 line decoder/demultiplexer manufactured by Renesas Electronics America. It is fabricated with silicon gate CMOS technology, offering low power consumption and high noise immunity. This device accepts three binary address inputs (A0, A1, A2) and enables one of eight outputs (Y0–Y7) based on the input code. Two active-low enable inputs (E1, E2) and one active-high enable input (E3) are provided to facilitate easy cascading and memory chip enabling.

Applications

• Memory decoding
• Address decoding in microprocessors
• Data routing
• Logic pattern generation
• Demultiplexing applications

Features

• High-speed operation: tpd = 13 ns (typ.) at VCC = 5V
• Low power dissipation: ICC = 4 μA (max.) at Ta = 25°C
• High noise immunity: VNIH = VNIL = 28% VCC (min.)
• Output drive capability: 10 LSTTL loads
• Cascading capability via enable inputs
• Wide operating voltage range: 2V to 6V
• Temperature range: -40°C to +85°C
• Package: SOP-16 (Small Outline Package)

Benefits

• Efficient memory addressing due to the 3-to-8 line decoding capability.
• Reduced system power consumption due to low power CMOS technology.
• Enhanced system reliability due to high noise immunity.
• Simplified cascading for larger decoding applications via enable inputs.
• Versatile applications due to wide operating voltage range.

Additional Details

The HD74HC138TELL-E is ideal for applications where low power consumption and high speed are critical. The enable inputs allow for easy expansion to larger decoding matrices. When the enable inputs are not asserted, all outputs are high. The device is compatible with LSTTL logic levels. It operates from -40°C to +85°C, making it suitable for a wide range of environmental conditions. The SOP-16 package provides a compact footprint for high-density board layouts. The outputs are active-low.