CD4047BM Equivalent & Substitute Parts

Part Overview

The CD4047BM is a monostable multivibrator logic integrated circuit manufactured by Texas Instruments, housed in a 14-SOIC surface mount package. This device is classified as discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and procurement. The CD4047BM operates across a wide supply voltage range of 3V to 18V and delivers 80 nanosecond propagation delay performance suitable for timing and pulse generation applications.

Substiute Parts

CD4047BM

Texas InstrumentsIn Stock: 2220CD4047BM Datasheet

Current PartRFQ

CD4047BM96

Texas InstrumentsIn Stock: 37847CD4047BM96 Datasheet

DirectRFQ

HEF4047BT,653

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

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the CD4047BM is determined by the following critical parameters:

Primary Substitution Criteria:

• Logic type: Astable and monostable operation capability
• Package compatibility: 14-SOIC surface mount form factor
• Independent circuits: Single circuit configuration
• Base product series: 4000B logic family
• Supply voltage range: Minimum 3V operation required
• Operating temperature range: Minimum -55°C to 125°C coverage
• RoHS3 compliance and REACH unaffected status

Acceptable Parameter Variations:

• Propagation delay: Faster performance (50 ns) is acceptable; slower performance requires design verification
• Output current: Specifications may vary between manufacturers
• Supply voltage upper limit: May be reduced (e.g., 15.5V vs 18V) if application operates within the lower range
• Operating temperature lower limit: May be relaxed (e.g., -40°C vs -55°C) if application does not require extended cold operation

Parameter Comparison

Engineering Selection Recommendations

CD4047BM96 (Direct Substitute): This part is the primary substitute for the CD4047BM. Both devices are manufactured by Texas Instruments, share identical electrical specifications, and are housed in the same 14-SOIC package. The CD4047BM96 is currently active in production, ensuring long-term availability. The only difference is packaging format (Cut Tape & Digi-Reel versus Tube), which does not affect electrical performance or board-level compatibility. This substitute is recommended for direct replacement without design modification.

HEF4047BT,653 (MFR Recommended Alternative): This Nexperia device provides equivalent functionality within the 4000B logic family and maintains the same 14-SOIC package footprint. The HEF4047BT,653 offers improved propagation delay performance at 50 ns compared to the CD4047BM's 80 ns specification. However, this substitute has a reduced supply voltage range (4.5V to 15.5V versus 3V to 18V) and narrower operating temperature range (-40°C to 85°C versus -55°C to 125°C). Selection of this part requires verification that the application operates within these reduced parameter boundaries. The HEF4047BT,653 is currently active in production and maintains ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can CD4047BM96 be used as a direct replacement for CD4047BM? A: Yes. The CD4047BM96 is electrically and mechanically identical to the CD4047BM. Both are Texas Instruments products with the same 80 ns propagation delay, supply voltage range (3V to 18V), operating temperature range (-55°C to 125°C), and 14-SOIC package. The only difference is packaging format, which does not affect circuit performance.

Q: What are the limitations of using HEF4047BT,653 as a substitute? A: The HEF4047BT,653 has two parameter restrictions: supply voltage range is limited to 4.5V to 15.5V (versus 3V to 18V for CD4047BM), and operating temperature range is -40°C to 85°C (versus -55°C to 125°C). Applications requiring operation below 4.5V supply voltage or below -40°C ambient temperature cannot use this substitute.

Q: Are all three parts pin-compatible? A: Yes. All three parts use the 14-SOIC package with identical pinout and functionality. No PCB layout modifications are required for substitution.

Q: Which substitute should be selected for new designs? A: CD4047BM96 is recommended for new designs due to its identical specifications and active production status. HEF4047BT,653 may be selected if the application operates within its reduced voltage and temperature ranges and if faster propagation delay (50 ns) is beneficial.

Q: Are all substitutes RoHS3 compliant? A: Yes. CD4047BM96 and HEF4047BT,653 are both ROHS3 compliant and REACH unaffected, matching the compliance status of the original CD4047BM.