CD4043BDW Equivalent & Substitute Parts

Part Overview

The CD4043BDW is a quad S-R latch with tri-state output logic integrated circuit manufactured by Texas Instruments in the 4000B series. This part is classified as a NOR R/S latch with four independent channels in a 16-SOIC surface mount package. The CD4043BDW is currently discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and production requirements. Substitute parts must maintain functional equivalence in logic type, circuit configuration, output characteristics, and package compatibility while meeting the same electrical and environmental specifications.

Substiute Parts

CD4043BDW

Texas InstrumentsIn Stock: 1386CD4043BDW Datasheet

Current PartRFQ

CD4043BDWR

Texas InstrumentsIn Stock: 977CD4043BDWR Datasheet

DirectRFQ

HEF4043BT,652

Nexperia USA Inc.In Stock: 889HEF4043BT,652 Datasheet

MFR RecommendedRFQ

HEF4043BT,653

Nexperia USA Inc.In Stock: 12367HEF4043BT,653 Datasheet

MFR RecommendedRFQ

MC14043BDR2G

onsemiIn Stock: 15185MC14043BDR2G Datasheet

MFR RecommendedRFQ

CD4044BDW

Texas InstrumentsIn Stock: 2038CD4044BDW Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CD4043BDW are grouped based on the following substitution criteria:

Direct Substitutes (Packaging Variant): Parts with identical electrical specifications, logic type, circuit configuration, and package footprint but different packaging format (tube versus tape & reel).

Manufacturer Recommended Substitutes: Parts from alternative manufacturers that maintain the same logic type, circuit configuration, output type, and package compatibility. These parts may have minor variations in propagation delay and output current within acceptable operating ranges, and may have different voltage supply ranges or operating temperature ranges.

Parametric Equivalents: Parts with the same base logic function and package type but different logic gate configuration (NAND versus NOR) that provide functional equivalence in specific applications.

The key parameters determining substitution eligibility are: logic type (S-R Latch), circuit configuration (1:1 with 4 channels), output type (tri-state), package type (16-SOIC), mounting type (surface mount), and series classification (4000B).

Parameter Comparison

Engineering Selection Recommendations

CD4043BDWR (Direct Substitute - Recommended): This part is the direct equivalent to CD4043BDW with identical electrical specifications and package dimensions. The only difference is the packaging format (tape & reel versus tube). CD4043BDWR maintains active product status and is ROHS3 compliant. This is the primary recommended substitute for new designs and production continuity.

HEF4043BT,653 (Manufacturer Recommended - Active Status): This Nexperia part maintains the same logic type, circuit configuration, output type, and 16-SOIC package footprint. It is currently active and ROHS3 compliant. The HEF4043BT,653 has a narrower voltage supply range (3V ~ 15V versus 3V ~ 18V) and a reduced operating temperature range (-40°C ~ 85°C versus -55°C ~ 125°C). Propagation delay is faster (15ns versus 50ns) and output current is lower (3mA versus 6.8mA). Selection of this part requires verification that the application operates within the specified voltage and temperature ranges.

MC14043BDR2G (Manufacturer Recommended - Active Status): This onsemi part provides functional equivalence with the same logic type, circuit configuration, output type, and package compatibility. It maintains the full voltage supply range (3V ~ 18V) and operating temperature range (-55°C ~ 125°C) of the original part. Output current is higher (8.8mA versus 6.8mA) and propagation delay is slightly longer (60ns versus 50ns). This part is active and ROHS3 compliant.

HEF4043BT,652 (Manufacturer Recommended - Obsolete Status): This Nexperia part is functionally equivalent but carries obsolete product status. It is not recommended for new designs due to long-term availability concerns.

CD4044BDW (Parametric Equivalent): This part differs in logic gate configuration (NAND versus NOR) but maintains the same package type, mounting type, and series classification. It is suitable only for applications where the NAND logic configuration is functionally equivalent to the NOR configuration required by the original design.

Frequently Asked Questions (FAQ)

Q: Can CD4043BDWR be used as a direct replacement for CD4043BDW?

A: Yes. CD4043BDWR is electrically and functionally identical to CD4043BDW. The only difference is the packaging format (tape & reel versus tube). Both parts have identical electrical specifications, package footprint, and mounting type. CD4043BDWR is the recommended substitute for production continuity.

Q: What are the key differences between CD4043BDW and HEF4043BT,653?

A: Both parts are S-R latches with tri-state output in 16-SOIC packages. The primary differences are: voltage supply range (CD4043BDW supports 3V ~ 18V while HEF4043BT,653 supports 3V ~ 15V), operating temperature range (CD4043BDW supports -55°C ~ 125°C while HEF4043BT,653 supports -40°C ~ 85°C), propagation delay (CD4043BDW is 50ns while HEF4043BT,653 is 15ns), and output current (CD4043BDW is 6.8mA while HEF4043BT,653 is 3mA). Selection requires verification that the application operates within the narrower specifications of the HEF4043BT,653.

Q: Is the CD4044BDW a suitable substitute for CD4043BDW?

A: CD4044BDW is a parametric equivalent with the same package type and series classification but uses NAND logic gates instead of NOR logic gates. It is suitable only for applications where the NAND logic configuration provides the required functional behavior. Direct substitution without circuit analysis is not recommended.

Q: What is the difference between tube and tape & reel packaging?

A: Tube packaging is used for lower-volume applications and manual handling, while tape & reel packaging is used for automated assembly processes. Both formats contain the same electronic component with identical electrical specifications and package footprint. Selection depends on the assembly process requirements of the application.

Q: Why is HEF4043BT,652 not recommended despite being a manufacturer equivalent?

A: HEF4043BT,652 carries obsolete product status, which indicates that the manufacturer has discontinued production and support. For long-term design support and production continuity, active parts such as HEF4043BT,653 or MC14043BDR2G are preferred.

Q: Can MC14043BDR2G be used in applications requiring the full temperature range of CD4043BDW?

A: Yes. MC14043BDR2G supports the full operating temperature range of -55°C ~ 125°C, matching the CD4043BDW specification. It also maintains the full voltage supply range of 3V ~ 18V. The primary differences are slightly higher output current (8.8mA versus 6.8mA) and slightly longer propagation delay (60ns versus 50ns), which are within acceptable operating margins for most applications.