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M74HC138B1R The STMicroelectronics M74HC138B1R is a high-speed CMOS 3-to-8 line decoder. It operates over a wide voltage range and features low power dissipation.
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M74HC138B1R

Available from 1 distributors
Mfr Name: STMicroelectronics
STMicroelectronics
The STMicroelectronics M74HC138B1R is a high-speed CMOS 3-to-8 line decoder. It operates over a wide voltage range and features low power dissipation.
✓ Total Stock: 12,615 pcs
$ Price Range: $1.27

M74HC138B1R Available from 1 distributor

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12,615 pcs
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12615 pcs On Request 1 On Request On Request 15+ On Request On Request
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M74HC138B1R Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Circuit
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Independent Circuits
Input Voltage
Mounting Type
Operating Temperature
Output Current
Output Voltage
Power Dissipation
Propagation Delay
Supplier Device Package
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Supply Voltage
Type
Voltage
Voltage Supply Source
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M74HC138B1R Description

Short technical summary and product information.

The STMicroelectronics M74HC138B1R is a high-speed CMOS 3-to-8 line decoder fabricated using silicon gate C2MOS technology. This device features three enable inputs for easy cascade connection and application in address decoders for memory systems. The decoder accepts 3 binary select inputs (A, B, and C) to determine which of the 8 outputs will go low when enabled. If the device is not enabled, all outputs remain high.

 

Key electrical characteristics include a wide operating voltage range from 2V to 6V and low power dissipation with a typical supply current of 4μA at 25°C. It offers high noise immunity and symmetrical output impedance with IOH = IOL = 4mA minimum. The propagation delay (tPD) is typically 13ns at VCC = 6V. All inputs are protected against static discharge and transient overvoltage.

 

The M74HC138B1R is available in a 16-DIP package and is designed for through-hole mounting. It operates within a temperature range of -55°C to 125°C. This component is suitable for applications requiring address decoding and signal selection in digital systems.

M74HC138B1R Quick Information

Product Type: Decoder/Demultiplexer
Series: M74HC138
Canonical Name: M74HC138 3-to-8 Line Decoder
Subcategory: Encoders, Decoders, Multiplexers & Demultiplexers

M74HC138B1R Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

M74HC138B1R Estimated Pricing

Qty Low High
1+ $1.27 $1.27

Estimated market price range - modelled values for guidance only, not live distributor offers.

M74HC138B1R Features

  • High-speed CMOS 3-to-8 line decoder.
  • Wide operating voltage range: 2V to 6V.
  • Low power dissipation: 4μA typical supply current.
  • High noise immunity and symmetrical outputs.
  • 16-DIP through-hole package.

M74HC138B1R Applications

  • Address decoding in memory systems.
  • Data demultiplexing in digital circuits.
  • Code conversion and logic selection.
  • Control signal routing in microcontrollers.

M74HC138B1R FAQs

7 frequently asked questions generated from this part’s specifications.
What is the operating voltage range of the M74HC138B1R?

The supply voltage range is 2V to 6V.

What package is the M74HC138B1R available in?

The device is housed in a 16-DIP through-hole package (0.300" pitch, 7.62mm).

What is the operating temperature range of the M74HC138B1R?

The operating temperature range is -55°C to 125°C.

What is the typical propagation delay of the M74HC138B1R?

The typical propagation delay is 13ns at VCC = 6V, CL = 50pF.

How many input and output lines does the M74HC138B1R have?

The device has 3 input lines and 8 output lines, configured as 1 x 3:8 decoder/demultiplexer.

What is the maximum supply current of the M74HC138B1R?

The maximum supply current is 4μA at 25°C.

What is the minimum output current of the M74HC138B1R?

The minimum output current is 4mA.

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