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TC74VHC138 The Toshiba TC74VHC138 is a high-speed CMOS 3-to-8 line decoder. It offers a propagation delay of 5.7 ns and operates over a wide voltage range.
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TC74VHC138

Available from 1 distributors
Mfr Name: Toshiba
Toshiba
The Toshiba TC74VHC138 is a high-speed CMOS 3-to-8 line decoder. It offers a propagation delay of 5.7 ns and operates over a wide voltage range.
✓ Total Stock: 1,100 pcs

TC74VHC138 Available from 1 distributor

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Optech Co.,Limited ✓
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1,100 pcs
On Request
1100 pcs On Request 1 On Request On Request 03+ On Request On Request
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TC74VHC138 Specifications Quick View

Most important parameters for selection – full specs in datasheet.
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TC74VHC138 Description

Short technical summary and product information.

The Toshiba TC74VHC138 is an advanced high-speed CMOS 3-to-8 decoder fabricated with silicon gate C2MOS technology. It achieves high-speed operation similar to equivalent Bipolar Schottky TTL while maintaining low power dissipation.

 

This decoder features a propagation delay of 5.7 ns (typical) at VCC = 5 V and a low quiescent current of 4 μA (maximum) at 25°C. It operates over a wide voltage range from 2 V to 5.5 V, making it suitable for interfacing between 5 V and 3 V systems. The device includes input protection circuitry that allows 0 to 5.5 V to be applied to the input pins without regard to the supply voltage, preventing device destruction due to mismatched supply and input voltages.

 

The TC74VHC138 has high noise immunity, with VNIH and VNIL at 28% VCC (minimum). It is pin and function compatible with the 74ALS138. The device is available in multiple package types, including SOP, SOL, TSSOP, and VSSOP, with varying weights.

 

This 3-to-8 line decoder is ideal for applications requiring address decoding in memory systems or for general-purpose decoding functions where high speed and low power consumption are critical.

TC74VHC138 Quick Information

Product Type: 3-to-8 Line Decoder
Series: 74VHC
Canonical Name: TC74VHC138 3-to-8 Line Decoder
Subcategory: 3-to-8 Line Decoder

TC74VHC138 Compliance

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

TC74VHC138 Features

  • High-speed CMOS 3-to-8 line decoder.
  • Propagation delay of 5.7 ns typical at 5V.
  • Wide operating voltage range from 2V to 5.5V.
  • Low power dissipation with 4 μA max quiescent current.
  • High noise immunity (28% VCC minimum).

TC74VHC138 Applications

  • Used in address decoding for memory systems.
  • Ideal for data routing and selection.
  • Suitable for low-power portable devices.
  • Employed in microcontroller peripheral decoding.

TC74VHC138 FAQs

6 frequently asked questions generated from this part’s specifications.
What is the typical propagation delay of the TC74VHC138?

The typical propagation delay is 5.7 ns at VCC = 5 V.

What is the operating voltage range for the TC74VHC138?

The operating voltage range is 2 V to 5.5 V.

What is the maximum quiescent current of the TC74VHC138?

The maximum quiescent current is 4 μA at Ta = 25°C.

What is the RoHS status of the TC74VHC138?

The RoHS status is RoHS3 Compliant.

What is the Moisture Sensitivity Level (MSL) for the TC74VHC138?

The Moisture Sensitivity Level is 1 Unlimited.

What is the REACH status of the TC74VHC138?

The REACH status is REACH Unaffected.

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