CD4555BM Equivalent & Substitute Parts

Part Overview

The CD4555BM is a Decoder/Demultiplexer logic IC manufactured by Texas Instruments, featuring a 1 x 2:4 circuit configuration in a 16-SOIC package. This part is discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications. The CD4555BM operates across a wide temperature range (-55°C to 125°C) with dual supply voltage capability (3V to 18V), serving as a critical component in digital signal routing and decoding applications.

Substiute Parts

CD4555BM

Texas InstrumentsIn Stock: 1223CD4555BM Datasheet

Current PartRFQ

CD4555BM96

Texas InstrumentsIn Stock: 5272CD4555BM96 Datasheet

DirectRFQ

CD4556BM

Texas InstrumentsIn Stock: 1306CD4556BM Datasheet

Parametric EquivalentRFQ

MC14555BDG

onsemiIn Stock: 1760MC14555BDG Datasheet

DirectRFQ

HEF4555BT,653

NXP SemiconductorsIn Stock: 3188HEF4555BT,653 Datasheet

MFR RecommendedRFQ

MC14555BDR2G

onsemiIn Stock: 1957MC14555BDR2G Datasheet

MFR RecommendedRFQ

NLV14555BDR2G

onsemiIn Stock: 3548NLV14555BDR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CD4555BM is determined by the following critical parameters:

• Circuit Configuration: Must be 1 x 2:4 Decoder/Demultiplexer
• Package Type: Must be 16-SOIC (0.154", 3.90mm Width)
• Voltage Supply Range: Must support 3V ~ 18V dual supply operation
• Mounting Type: Must be Surface Mount
• Series Compatibility: 4000B logic family

Substitute parts are grouped into three categories based on their relationship to the main part:

Direct Packaging Equivalent: CD4555BM96 (Tape & Reel packaging variant of the same base product)

Parametric Equivalent: CD4556BM (Same manufacturer, identical electrical specifications, different base product number)

Cross-Manufacturer Equivalents: MC14555BDG, MC14555BDR2G, NLV14555BDR2G (onsemi), HEF4555BT,653 (NXP Semiconductors)

All listed substitutes maintain the core 1 x 2:4 decoder/demultiplexer functionality and 16-SOIC package footprint required for direct board-level replacement.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: CD4555BM96 is the direct equivalent, offering identical electrical specifications and the same Texas Instruments manufacturing lineage. This part maintains active product status with higher inventory availability (5231 pcs) compared to the original CD4555BM (1178 pcs). The only difference is packaging format (Tape & Reel vs. standard packaging).

Secondary Recommendation: MC14555BDR2G (onsemi) or NLV14555BDR2G (onsemi) provide cross-manufacturer alternatives with active product status. Both maintain the full operating temperature range (-55°C to 125°C) and voltage supply range (3V to 18V). Output current specifications are slightly higher (8.8mA vs. 6.8mA), which is acceptable for most applications requiring the CD4555BM.

Alternative for Reduced Temperature Range Applications: HEF4555BT,653 (NXP Semiconductors) is suitable only for applications operating within -40°C to 85°C. This part has lower output current (3mA) and reduced maximum supply voltage (15V vs. 18V), making it unsuitable for designs requiring the full CD4555BM operating envelope.

Avoid: CD4556BM carries "Last Time Buy" status, indicating limited future availability despite current inventory levels.

Frequently Asked Questions (FAQ)

Q: Can I use CD4555BM96 as a direct replacement for CD4555BM?

A: Yes. CD4555BM96 is electrically and functionally identical to CD4555BM. The only difference is packaging format (Tape & Reel vs. standard tube/bulk). Both are Texas Instruments products with identical specifications.

Q: What is the difference between MC14555BDG and MC14555BDR2G?

A: Both are onsemi products with identical electrical specifications. The difference is packaging format: MC14555BDG is supplied in Tube packaging, while MC14555BDR2G is supplied in Cut Tape (CT) format. Select based on your procurement and assembly requirements.

Q: Can I use HEF4555BT,653 in place of CD4555BM?

A: HEF4555BT,653 is compatible only for applications operating within -40°C to 85°C and with maximum supply voltage of 15V. If your design requires the full -55°C to 125°C temperature range or supply voltages above 15V, this substitute is not suitable.

Q: Are all listed substitutes RoHS3 compliant?

A: All Texas Instruments and onsemi parts listed are ROHS3 compliant. RoHS status for HEF4555BT,653 is not specified in available documentation.

Q: What is the significance of the 4000B series designation?

A: The 4000B series indicates these are CMOS logic devices from the 4000 family. All listed substitutes belong to this same series, ensuring functional and electrical compatibility.

Q: Do output current differences between substitutes affect circuit design?

A: Output current specifications (3mA to 8.8mA) indicate the maximum current the decoder outputs can source or sink. Higher output current capability (onsemi parts at 8.8mA) is backward compatible with designs requiring lower current (CD4555BM at 6.8mA). Lower output current (HEF4555BT,653 at 3mA) may limit fan-out capability in some applications.