CD4556BM Equivalent & Substitute Parts

Part Overview

The CD4556BM is a Decoder/Demultiplexer logic integrated circuit manufactured by Texas Instruments, configured as a 1 x 2:4 decoder in a 16-SOIC surface mount package. This part operates across a dual supply voltage range of 3V to 18V and supports operating temperatures from -55°C to 125°C. The CD4556BM is currently in Last Time Buy status, making identification of equivalent and substitute parts essential for ongoing design support and procurement planning.

Substiute Parts

CD4556BM

Texas InstrumentsIn Stock: 1306CD4556BM Datasheet

Current PartRFQ

CD4556BM96

Texas InstrumentsIn Stock: 5702CD4556BM96 Datasheet

MFR RecommendedRFQ

MC14556BDR2G

onsemiIn Stock: 2263MC14556BDR2G Datasheet

MFR RecommendedRFQ

NLV14556BDR2G

onsemiIn Stock: 3720NLV14556BDR2G Datasheet

MFR RecommendedRFQ

CD4555BM

Texas InstrumentsIn Stock: 1223CD4555BM Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CD4556BM is determined by strict equivalence across the following critical parameters:

• Circuit configuration (1 x 2:4 decoder/demultiplexer topology)
• Package type (16-SOIC surface mount)
• Voltage supply range (3V ~ 18V dual supply)
• Operating temperature range (-55°C ~ 125°C)
• Output current specifications (6.8mA or higher for both high and low states)
• RoHS3 compliance and MSL rating

Substitute parts are grouped into two categories: Manufacturer Recommended Substitutes (direct replacements with identical or superior electrical characteristics) and Parametric Equivalents (functionally equivalent parts with minor specification variations).

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: CD4556BM96

The CD4556BM96 from Texas Instruments is the direct manufacturer-recommended substitute. It maintains identical electrical specifications, package configuration, and compliance certifications as the CD4556BM. The primary distinction is packaging format (Cut Tape & Digi-Reel versus Tube), with CD4556BM96 currently in Active product status and higher inventory availability (5667 pcs). This part is suitable for direct replacement in all applications.

Secondary Substitutes: MC14556BDR2G and NLV14556BDR2G

Both onsemi parts (MC14556BDR2G and NLV14556BDR2G) provide functional equivalence with enhanced output current specifications (8.8mA versus 6.8mA for both high and low states). These parts maintain identical voltage supply ranges, operating temperature specifications, and package configurations. Both are in Active product status with substantial inventory. The increased output current capability makes these parts suitable for applications requiring higher drive capability.

Parametric Equivalent: CD4555BM

The CD4555BM from Texas Instruments is a parametric equivalent with identical electrical specifications to the CD4556BM. However, this part is currently Discontinued at DiGi Electronics and should be considered only when existing inventory is available and no other substitutes are viable.

Frequently Asked Questions (FAQ)

Q: Can CD4556BM96 be used as a direct replacement for CD4556BM?

A: Yes. CD4556BM96 is the manufacturer-recommended substitute with identical electrical specifications, package type, and compliance ratings. The only difference is packaging format (Cut Tape & Digi-Reel versus Tube).

Q: What is the difference between MC14556BDR2G and CD4556BM?

A: Both parts are functionally equivalent with identical circuit configuration, voltage supply range, and operating temperature. MC14556BDR2G provides higher output current (8.8mA versus 6.8mA), making it suitable for applications requiring increased drive capability. MC14556BDR2G is manufactured by onsemi and supplied in Tape & Reel packaging.

Q: Is NLV14556BDR2G compatible with CD4556BM applications?

A: Yes. NLV14556BDR2G maintains all critical parameters including circuit configuration, voltage supply range, operating temperature, and package type. Like MC14556BDR2G, it provides enhanced output current (8.8mA) and is manufactured by onsemi.

Q: Why is CD4555BM listed as a substitute if it is discontinued?

A: CD4555BM is included as a parametric equivalent for reference purposes. It maintains identical electrical specifications to CD4556BM but is no longer actively distributed. This part should only be considered if existing inventory is available.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts (CD4556BM96, MC14556BDR2G, NLV14556BDR2G, and CD4555BM) are ROHS3 compliant with MSL rating of 1 (Unlimited), matching the compliance profile of the CD4556BM.

Q: Can I use these substitutes in high-temperature applications?

A: Yes. All substitute parts support the full operating temperature range of -55°C to 125°C, making them suitable for high-temperature applications equivalent to the CD4556BM.