MM74HC138MTCX Standard Logic by ON Semiconductor

3 to 8 Line Decoder

Status: Active
Series: MM74HC138
RoHS: Compliant
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The MM74HC138 decoder utilizes advanced silicon-gate CMOS technology and is well suited to memory address decoding or data routing applications. The circuit features high noise immunity and low power consumption usually associated with CMOS circuitry, yet has speeds comparable to low power Schottky TTL logic. The MM74HC138 has 3 binary select inputs (A, B, and C). If the device is enabled, these inputs determine which one of the eight normally HIGH outputs will go LOW. Two active LOW and one active HIGH enables (G1, G2A# and G2B#) are provided to ease the cascading of decoders. The decoder's outputs can drive 10 low power Schottky TTL equivalent loads, and are functionally and pin equivalent to the 74LS138. All inputs are protected from damage due to static discharge by diodes to VCC and ground.

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Prices starting from US$0.15

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from US$0.19
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from US$0.19
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Future Electronics
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Avnet America
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Typical propagation delay: 20 ns
Wide power supply range: 2V-6V
Low quiescent current: 80 µA maximum (74HC Series)
Low input current: 1 µA maximum
Fanout of 10 LS-TTL loads
This product is general usage and suitable for many different applications.


Description MM74HC138
Compliance Pb-free Halide free
Type Coder/Decoder
Channels 1
VCC Min (V) 2
VCC Max (V) 6
tpd Max (ns) null
IO Max (mA) null
Package Type TSSOP-16

Alternative Descriptions

Decoder/Demultiplexer, 3:8, Tssop-16 | Newark Electronics
74HC Series 2 to 6 V Supply CMOS 3 to 8 Line Decoder - TSSOP-16 | Future Electronics
Decoder/Demultiplexer Single 3-to-8 16-Pin TSSOP T/R | Avnet America

Frequently Asked Questions

Where can I find additional details, specifications and documents for a MM74HC138MTCX?

Additional datasheets, footprints and schematics for MM74HC138MTCX are listed on our Part Details page. You can also find images and similar parts to MM74HC138MTCX on this page.

What pricing and inventory information can I view?

Distributor pricing and stock information is available for MM74HC138MTCX on our Product Comparison page. Access via the 'View Pricing & Stock' button to view MM74HC138MTCX price breaks, MOQs, lead times, inventory and SKUs from distributors.

What category does MM74HC138MTCX fall under?

The MM74HC138MTCX is listed under Timing, Logic & Memory > Standard Logic > Logic Gates.

Can I view similar or alternative parts?

You can view similar parts to MM74HC138MTCX when available in the Logic Gates range under the specifications section at the bottom of the details page.

Who can I contact for technical support of the product?

Submit any questions directly to the customer support team of the distributor listing the product. For the MM74HC138MTCX you can contact the distributor directly for product support, shipping queries etc.

Is the MM74HC138MTCX RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by ON Semiconductor.

Which authorised distributors for MM74HC138MTCX have stock available?

Authorised distributors including Farnell, Newark Electronics, Future Electronics, Avnet America and EBV Elektronik have stock available or on a lead time for MM74HC138MTCX.

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