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Product Detailed Parameters
- Description：IC DECODER/DEMUX 1X3:8 16TSSOP
- Series：74HC
- Mfr：Texas Instruments
- Package：Tape & Reel (TR)
- 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 SN74HC138PWRG4 is a 3-to-8 decoder and demultiplexer from the Texas Instruments SN74HC series. It operates within a supply voltage range of 2 V to 6 V and features active-low outputs selected by three binary inputs (A, B, C). The device incorporates three enable inputs: one active-high (G1) and two active-low (G2A, G2B), which facilitate cascading or data reception without external logic gates. Packaged in a TSSOP-16 format, it is designed for high-speed memory decoders and data-transmission systems.
Feature Summary
- Three enable inputs simplify system expansion and reduce the need for external inverters during cascading.
- Active-low outputs ensure that only the selected output line is pulled low while others remain high.
- CMOS technology provides balanced output drive capabilities suitable for driving LSTTL loads.
Applications
- LED Matrix Displays
- High-performance Memory Decoding
- Data-Routing Systems
Procurement Notes
Verify the specific ordering suffix 'G4' against the manufacturer's current Package Option Addendum to confirm lead finish and RoHS compliance status. Ensure the TSSOP-16 package designation matches the required board footprint dimensions. Confirm the component status as Active Production before finalizing procurement plans.
Selection Notes
Select this component when a single 3-to-8 decoding function is required with minimal propagation delay. The inclusion of multiple enable pins allows for flexible system architecture expansion. Verify that the operating temperature range of -40°C to +85°C aligns with the environmental requirements of the target application.
Part Context
This part belongs to the SNx4HC138 family of 3-line to 8-line decoders and demultiplexers manufactured by Texas Instruments. The 'PWR' suffix indicates a TSSOP surface-mount package, while 'G4' denotes Green/RoHS-compliant manufacturing. It is distinct from the SN54HC138 variant, which supports an extended military-grade temperature range.
Replacement Considerations
SN74HC138PWR
FAQ
How are the enable inputs configured for operation?
The device requires G1 to be High and both G2A and G2B to be Low for the outputs to be enabled. Any deviation forces all outputs High.
What is the state of unselected outputs?
When the device is enabled, the selected output is pulled Low, while all other unselected outputs remain in a High state.
