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Product Detailed Parameters
- Description：IC DECODER/DEMUX 1X3:8 16TSSOP
- Series：74HC
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT),Bulk
- Type：Decoder/Demultiplexer
- Circuit：1 x 3:8
- Independent Circuits：1
- Current - Output High, Low：5.2mA, 5.2mA
- Voltage Supply Source：Single Supply
- Voltage - Supply：2V ~ 6V
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：16-TSSOP (0.173", 4.40mm Width)
- Supplier Device Package：16-TSSOP
- Grade：-
- Qualification：-
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Overview
The SN74HC138PWR is a single 3-to-8 decoder/demultiplexer in the HC logic family, housed in a 16-pin TSSOP package. It operates on a supply voltage range of 2 V to 6 V with an operating temperature range of -40°C to +85°C. The device features three binary select inputs (A, B, C) and three enable inputs (G1, G2A, G2B). Propagation delay from input to output reaches a maximum of 45 ns at 4.5 V. Outputs are active-low, capable of driving up to 10 LSTTL loads, with a maximum quiescent current of 80 µA.
Feature Summary
- Designed for high-speed memory decoding and data-routing applications requiring minimal system delay.
- Incorporates three enable inputs to simplify cascading or demultiplexing without external inverters.
- Outputs can drive up to 10 LSTTL loads while maintaining low power consumption.
Applications
- LED Displays
- Servers
- White Goods
- Power Infrastructure
- Building Automation
Procurement Notes
Verify the specific ordering suffix 'PWR' corresponds to the TSSOP-16 package and tape-and-reel carrier format. Confirm RoHS compliance status and lead finish details via the manufacturer's official orderable addendum. Ensure the component meets the required industrial temperature specifications for the target environment.
Selection Notes
Select this part when a 3-to-8 decoding function is required within the standard HC logic family constraints. Consider the TSSOP-16 footprint compatibility during PCB layout. Evaluate if the propagation delay characteristics meet the timing requirements of the associated high-speed memory or data transmission systems.
Part Context
This component belongs to the SNx4HC138 series of 3-line to 8-line decoders and demultiplexers manufactured by Texas Instruments. It utilizes CMOS technology to provide balanced output drive capabilities. The device is designed to minimize the effects of system decoding in high-performance memory systems where fast enable circuits are employed.
Replacement Considerations
SN74HC138PW
FAQ
How many enable inputs does the SN74HC138PWR have?
The device incorporates three enable inputs: one active-high (G1) and two active-low (G2A, G2B).
What is the logic state of the outputs when selected?
The outputs are active-low; the selected output is pulled LOW while the remaining outputs remain HIGH.
