CD4047BCM Equivalent & Substitute Parts

Part Overview

The CD4047BCM is a monostable multivibrator logic integrated circuit manufactured by onsemi, housed in a 14-SOIC surface mount package. This device operates across a wide supply voltage range of 3V to 15V with a propagation delay of 80 nanoseconds and supports both astable and monostable operation modes. The CD4047BCM is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Substiute Parts

CD4047BCM

onsemiIn Stock: 93397CD4047BCM Datasheet

Current PartRFQ

CD4047BM

Texas InstrumentsIn Stock: 2220CD4047BM Datasheet

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CD4047BM96

Texas InstrumentsIn Stock: 37847CD4047BM96 Datasheet

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CD4047BMG4

Texas InstrumentsIn Stock: 714CD4047BMG4 Datasheet

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CD4047BMT

Texas InstrumentsIn Stock: 698CD4047BMT Datasheet

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CD4047BNSR

Texas InstrumentsIn Stock: 2764CD4047BNSR Datasheet

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HEF4047BT,653

Nexperia USA Inc.In Stock: 2216HEF4047BT,653 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CD4047BCM is determined by the following critical parameters:

Primary Compatibility Criteria:

• Logic type (astable and monostable operation)
• Independent circuits (1 circuit)
• Package type (14-SOIC surface mount)
• Propagation delay (80 ns nominal)
• Supply voltage range compatibility (minimum 3V to 15V overlap)
• Operating temperature range (-55°C to 125°C overlap)

Grouping Logic:

Group 1 - Direct Substitutes (Texas Instruments CD4047 variants): CD4047BM, CD4047BM96, CD4047BMG4, and CD4047BMT maintain identical logic functionality, propagation delay (80 ns), and package footprint. These parts support the same astable/monostable operation with compatible supply voltage ranges (3V to 18V) and temperature ratings. CD4047BM96 is the only active product in this group.

Group 2 - Package Variant (Texas Instruments CD4047BNSR): This part maintains identical electrical specifications but uses a 14-SO package (0.209", 5.30mm width) instead of the standard 14-SOIC (0.154", 3.90mm width). Physical board layout compatibility must be verified before selection.

Group 3 - Performance Variant (Nexperia HEF4047BT,653): This substitute offers improved propagation delay (50 ns versus 80 ns) and operates within a narrower supply voltage range (4.5V to 15.5V) and temperature range (-40°C to 85°C). The tighter specifications may not be suitable for all applications requiring the full -55°C to 125°C operating range.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: CD4047BM96

CD4047BM96 is the preferred substitute for CD4047BCM applications. This Texas Instruments part maintains identical electrical specifications (80 ns propagation delay, astable/monostable operation) and package footprint (14-SOIC 0.154" width). The part is currently active with robust inventory availability (37,771 units in stock) and carries RoHS3 compliance certification. The extended supply voltage range (3V to 18V) provides superior compatibility with the original specification.

Secondary Recommendation: CD4047BNSR

CD4047BNSR is suitable for applications where the 14-SO package (0.209" width) can be accommodated on the printed circuit board. This Texas Instruments part is active and maintains identical electrical performance. Physical layout verification is required due to the wider package footprint.

Alternative Consideration: HEF4047BT,653

The Nexperia HEF4047BT,653 is an active substitute offering superior propagation delay performance (50 ns). However, this part operates within a narrower supply voltage range (4.5V to 15.5V) and reduced temperature range (-40°C to 85°C). Selection of this part is appropriate only for applications that do not require operation below -40°C or above 85°C, and where supply voltage remains within 4.5V to 15.5V bounds.

Not Recommended: CD4047BM, CD4047BMG4, CD4047BMT

These Texas Instruments variants are discontinued at DiGi Electronics and should not be selected for new designs or production continuity planning.

Frequently Asked Questions (FAQ)

Q: Can CD4047BM96 directly replace CD4047BCM without circuit modifications?

A: Yes. CD4047BM96 maintains identical propagation delay (80 ns), logic operation modes (astable and monostable), and 14-SOIC package footprint. The extended supply voltage range (3V to 18V) ensures full backward compatibility.

Q: What is the key difference between CD4047BNSR and CD4047BM96?

A: Both parts are electrically identical with 80 ns propagation delay and identical supply/temperature specifications. The difference is physical: CD4047BNSR uses a 14-SO package (0.209" width) while CD4047BM96 uses a 14-SOIC package (0.154" width). Board layout compatibility must be verified before substitution.

Q: Why is HEF4047BT,653 not the primary recommendation despite being active?

A: HEF4047BT,653 operates within a narrower temperature range (-40°C to 85°C) and supply voltage range (4.5V to 15.5V) compared to the original CD4047BCM specification (-55°C to 125°C, 3V to 15V). Selection is appropriate only when application requirements fall within these tighter bounds.

Q: Are all recommended substitutes RoHS3 compliant?

A: CD4047BM96, CD4047BNSR, and HEF4047BT,653 are all RoHS3 compliant. All parts carry REACH Unaffected status and EAR99 export classification.

Q: What is the propagation delay difference between CD4047BM96 and HEF4047BT,653?

A: CD4047BM96 has a propagation delay of 80 ns, while HEF4047BT,653 has 50 ns. The Nexperia part offers 37.5% faster switching performance. This difference is significant only in timing-critical applications.

Q: Can I use HEF4047BT,653 in an application originally designed for CD4047BCM operating at -55°C?

A: No. HEF4047BT,653 has a minimum operating temperature of -40°C, making it unsuitable for applications requiring -55°C operation. CD4047BM96 maintains the full -55°C to 125°C temperature range.