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Nexperia USA Inc.

74HC138D,653

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Nexperia 74HC138D,653 is a 3-to-8 CMOS decoder/demultiplexer in an SO16 package, featuring 2.0–6.0 V operation, active-low outputs, multiple enable inputs, and 12 ns typical propagation delay.

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Part No.:: 74HC138D,653

Manufacturer:: Nexperia USA Inc.

Category:: Signal Switches, Multiplexers, Decoders

Package:: 16-SOIC (0.154", 3.90mm Width)

Datasheet:: 74HC138D,653.pdf

Description:: Nexperia 74HC138D,653 is a 3-to-8 CMOS decoder/demultiplexer in an SO16 package, featuring 2.0–6.0 V operation, active-low outputs, multiple enable inputs, and 12 ns typical propagation delay.

Quantity:: RFQ Add To RFQ list

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74HC138D,653 Nexperia USA Inc. product image

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Product Details

FLYCHIP Product Review

NXP 74HC138D,653 3-to-8 Decoder / Demultiplexer Engineering Review

A practical engineering and procurement review of the NXP 74HC138D,653 high-speed CMOS 3-to-8 decoder / demultiplexer, covering electrical parameters, pin functions, decoding logic, timing considerations, SO16 packaging, sourcing risk and PCB integration.

Brand NXP

Part Number 74HC138D,653

Function 3-to-8 Inverting Decoder / Demultiplexer

NXP 74HC138D,653 Product Overview

The 74HC138D,653 is a high-speed CMOS 3-to-8 line decoder / demultiplexer. It decodes three binary-weighted address inputs, A0, A1 and A2, into eight mutually exclusive active-LOW outputs identified as Y0 through Y7.

When the enable conditions are valid, only one output becomes LOW for each binary address combination. This makes the device useful for memory bank selection, peripheral chip-select generation, I/O expansion and digital control systems.

The device also provides three enable inputs. E1 and E2 are active LOW, while E3 is active HIGH. The multiple-enable architecture makes cascading straightforward and allows larger decoder structures to be created without complex external logic.

3→8: Decoder / demultiplexer architecture

2–6V: HC-family supply voltage range

12ns: Parametric propagation-delay reference

SO16: SOT109-1 surface-mount package

Why engineers use the 74HC138

Three address lines can generate eight separate chip-select outputs. In MCU, processor and memory systems, this can reduce GPIO usage while maintaining predictable hardware-level selection logic.

74HC138D,653 Parameter Dashboard

The following visual parameter dashboard highlights key 74HC138D characteristics used during preliminary component selection. Timing and output-current values must always be checked under the voltage, temperature and load conditions of the actual application.

Supply Voltage

74HC CMOS operating range

2–6V

2V 3.3V 5V 6V

Propagation Delay

Product-family parametric reference

12ns

0 10ns 20ns

Output Drive Capability

Parametric product-family value

±5.2mA

Low Logic Drive 5.2mA

ESD Protection

HBM / CDM device protection rating

2kV+

CDM >1kV HBM >2kV

Specified Ambient Temperature Range -40°C to +125°C

-40°C 25°C 85°C 125°C

Timing values are condition-dependent

The 12 ns propagation-delay figure is useful as a product-family comparison parameter, but it should not be treated as a guaranteed delay under every operating condition. Datasheet timing tables should be checked for the actual VCC, output capacitance and temperature.

74HC138D,653 Technical Specifications

Brand	NXP legacy sourcing requirement
Part Number	74HC138D,653
Base Type	74HC138D
Device Function	3-to-8 line decoder / demultiplexer; inverting
Logic Family	74HC high-speed CMOS
Address Inputs	A0, A1, A2
Enable Inputs	E1 and E2 active LOW; E3 active HIGH
Outputs	Y0 to Y7, mutually exclusive active LOW
Supply Voltage	2.0 V to 6.0 V
Logic Input Level	CMOS
Output Drive Capability	±5.2 mA parametric reference
Propagation Delay	12 ns parametric reference; verify test conditions
Operating Temperature	-40°C to +125°C
Package	SO16
Package Code	SOT109-1
Moisture Sensitivity	MSL 1
Ordering Code	74HC138D,653

Low-Power CMOS

The 74HC logic family combines relatively low static power consumption with high-speed digital switching.

High Noise Immunity

CMOS input architecture provides strong noise immunity when logic-level requirements are correctly observed.

Expansion Capability

The three enable inputs support larger cascaded decoder architectures.

Memory Decoding

The device is well suited for generating hardware chip-select signals in memory and peripheral systems.

74HC138D 3-to-8 Logic Operation

The internal function is easiest to understand as a three-bit binary address decoder. A0, A1 and A2 form the address, while E1, E2 and E3 determine whether the device is enabled.

3 Address Inputs → Decoder → 8 Active-LOW Outputs

E1 / E2 / E3

74HC138D 3-to-8 Inverting Decoder / Demultiplexer

...

Decoder Output Selection

A2 A1 A0 = 000 Y0 LOW

A2 A1 A0 = 001 Y1 LOW

A2 A1 A0 = 010 Y2 LOW

A2 A1 A0 = 011 Y3 LOW

A2 A1 A0 = 100 Y4 LOW

A2 A1 A0 = 101 Y5 LOW

A2 A1 A0 = 110 Y6 LOW

A2 A1 A0 = 111 Y7 LOW

Active-LOW output warning

The selected output becomes LOW rather than HIGH. This is one of the most important details to verify when replacing another decoder or designing firmware around the device.

74HC138D Pinout & Engineering Verification

Pin 1	A0 - address input
Pin 2	A1 - address input
Pin 3	A2 - address input
Pin 4	E1 - active-LOW enable
Pin 5	E2 - active-LOW enable
Pin 6	E3 - active-HIGH enable
Pin 7	Y7 - active-LOW output
Pin 8	GND
Pin 9	Y6 - active-LOW output
Pin 10	Y5 - active-LOW output
Pin 11	Y4 - active-LOW output
Pin 12	Y3 - active-LOW output
Pin 13	Y2 - active-LOW output
Pin 14	Y1 - active-LOW output
Pin 15	Y0 - active-LOW output
Pin 16	VCC

E1 and E2 must be LOW while E3 must be HIGH for normal decoding operation.
Do not leave address or enable inputs floating.
Confirm CMOS input thresholds at the actual VCC.
Verify timing using the datasheet conditions that match the application supply and output load.
Place a local bypass capacitor close to VCC and GND.
Check that the selected output load remains within the device's guaranteed current limits.

74HC138D,653 Applications & BOM Integration

Memory Chip Select

Generate individual active-LOW chip-select signals from processor or controller address lines.

Peripheral Selection

Select one of several peripheral ICs without using a dedicated MCU GPIO for every device.

Demultiplexing

The enable inputs can be used with address inputs to implement digital demultiplexing functions.

Decoder Expansion

Multiple devices can be cascaded to build larger address decoder structures.

The multiple-enable architecture allows four '138 devices and one inverter to implement a 1-of-32 decoding structure. This is useful in larger memory maps and peripheral-selection systems where deterministic hardware decoding is preferred.

NXP 74HC138D,653 Procurement & Replacement Risk

When a BOM specifically identifies an NXP-branded 74HC138D,653, sourcing teams should determine whether the manufacturer identity is mandatory or whether a qualified equivalent is permitted.

Manufacturer Marking

Check manufacturer logo, device marking, date code and available traceability when exact legacy material is required.

SO16 Footprint

The D package corresponds to SOT109-1 / SO16. Do not qualify a substitute from a generic "SOP-16" description alone.

HC vs HCT

74HC138 uses CMOS input levels. 74HCT138 uses TTL-compatible input levels and should not be automatically substituted.

Output Architecture

Confirm active-LOW mutually exclusive outputs when evaluating other decoder devices.

What Does "653" Mean?

The ,653 suffix belongs to the complete orderable-part configuration and is associated with packaging / production ordering rather than a different 3-to-8 decoding function.

Engineering teams can therefore evaluate the device core as 74HC138D, while procurement teams should preserve the complete 74HC138D,653 code when matching the approved production BOM and reel configuration.

Legacy-brand control

Current 74HC138D,653 production information is available under Nexperia. If the customer BOM specifically requires historical NXP-branded material, a manufacturer change should be handled as a controlled substitution rather than an automatic replacement.

74HC138D SO16 PCB, SMT & PCBA Integration

The D version uses the SOT109-1 SO16 surface-mount package. The manufacturer package drawing should be used when building or checking the PCB footprint rather than relying only on a generic SOP-16 library name.

1: Footprint Check
Verify SOT109-1 pad geometry and pin-1 orientation.

2: Power Integrity
Place local bypass capacitance close to pins 16 and 8.

3: SMT Setup
Check reel orientation and pick-and-place polarity.

4: Functional Test
Verify enable logic and all eight decoded outputs.

Recommended 74HC138D,653 Purchase Decision Flow

Part Number Brand Requirement HC Logic Check SO16 Footprint Source Review Production Approval

Confirm the required brand and full order code.
Verify 74HC CMOS-level compatibility.
Check active-LOW output logic.
Verify SO16 / SOT109-1 PCB compatibility.
Check source, date code and packaging condition.
Approve substitutes only after engineering review.

74HC138D,653 Engineering & Procurement Notice

This product content is intended for engineering review, component sourcing, BOM maintenance and production procurement reference. Final component approval should be based on the applicable manufacturer documentation and project requirements.

Propagation delay, output-drive capability, logic thresholds and other dynamic electrical characteristics depend on supply voltage, output load and operating temperature. Headline parametric figures should therefore be used for preliminary comparison rather than replacing detailed timing-table review.

For legacy NXP-specific BOMs, manufacturer identity, date code, package, marking and traceability requirements should be confirmed before a current-source equivalent is introduced.

FLYCHIP can support 74HC138D,653 sourcing together with BOM procurement, PCB manufacturing, SMT assembly and PCBA project coordination. Final suitability remains subject to customer engineering qualification.

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74HC138D,653 Technical Information

Specifications
FAQ
Hot Sale
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Specifications

Product Attributes: Attribute Value

Manufacturer:: Nexperia USA Inc.

Series:: 74HC

Package/Case:: 16-SOIC (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

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 ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 16-SO

FAQ

1. How to order 74HC138D,653 on Flychip?

You can submit an RFQ directly on this page. Our sales team will review your quantity, delivery requirements and target price, then reply with a quotation as soon as possible.

2. How does Flychip verify the quality of 74HC138D,653?

We work with qualified channels including international chip manufacturers and well-known distributors. Our team pays close attention to supplier review, traceability, product condition and quality control.

3. Are the price and inventory of 74HC138D,653 updated in real time?

Inventory and prices of electronic components may fluctuate frequently. The displayed data is for reference, and the final quotation will be confirmed by our sales team.

4. What payment methods are accepted?

Wire Transfer, PayPal, Alipay, WeChat, Credit Card, Western Union, MoneyGram and Escrow may be supported depending on the order and region.

5. How is shipping arranged?

We can arrange international shipping through DHL, UPS, FedEx, TNT and other logistics channels. Tracking information will be provided after shipment.

6. What is the return or replacement process for 74HC138D,653?

Please contact our sales team within the specified period if there are quantity differences, wrong items, or clear external defects. The product should remain unused and in its original packaging.

7. Can I request technical support for 74HC138D,653?

Yes. You can contact us for datasheet, package details, pin information and sourcing assistance related to 74HC138D,653.

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74HC138D,653 Sourcing & Technical Support

74HC138D,653 is supplied by Nexperia USA Inc.. This page provides key purchasing information including manufacturer, package, datasheet, stock reference, price reference and RFQ support.

As your reliable partner for semiconductor solutions, Flychip supports customers from research and development to mass production with electronic component supply, BOM sourcing, PCB, SMT and PCBA solutions.

Our sourcing partners include international chip manufacturers and well-known distributors. With rich experience in channel management, quality control and sales management, Flychip helps customers accelerate product development and delivery.