CD4043BE-NG Equivalent & Substitute Parts

Part Overview

The CD4043BE-NG is a single-channel S-R Latch logic integrated circuit manufactured by Texas Instruments, part of the 4000B series. This device features tri-state, non-inverted output configuration in a 16-pin DIP package for through-hole mounting applications. The product is classified as obsolete, necessitating identification of active equivalent alternatives to maintain design continuity and ensure long-term component availability for new production and maintenance applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	CD4043BE-NG
Manufacturer	Texas Instruments
Logic Type	S-R Latch
Circuit Configuration	4:4
Output Type	Tri-State, Non-Inverted
Independent Circuits	1
Voltage Supply Range	3V ~ 18V
Propagation Delay Time	50ns
Output Current (High/Low)	6.8mA / 6.8mA
Operating Temperature Range	-55°C ~ 125°C
Package Type	16-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the CD4043BE-NG are identified based on strict electrical and mechanical parameter compatibility within the 4000B logic series. The substitution logic is organized into two categories:

MFR Recommended Substitute (CD4043BPWR): This part maintains identical electrical specifications including voltage supply range (3V ~ 18V), propagation delay (50ns), and output current characteristics (6.8mA). The primary difference is packaging format: surface-mount 16-TSSOP versus through-hole 16-DIP. This substitute is manufacturer-recommended and carries active product status with full RoHS3 compliance.

Parametric Equivalent (CD4044BE-NG): This part provides identical electrical performance and through-hole 16-DIP packaging, maintaining form-factor compatibility with the original CD4043BE-NG. The key distinction is active product status, ensuring continued availability and manufacturing support.

Substitution eligibility is determined by the following parameters:

Logic Type: S-R Latch
Voltage Supply Range: 3V ~ 18V
Propagation Delay: 50ns
Output Current: 6.8mA (High and Low)
Operating Temperature: -55°C ~ 125°C
RoHS3 Compliance

Parameter Comparison

Parameter	CD4043BE-NG (Main)	CD4043BPWR (MFR Recommended)	CD4044BE-NG (Parametric Equivalent)
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments
Series	4000B	4000B	4000B
Logic Type	S-R Latch	S-R Latch	S-R Latch
Output Type	Tri-State, Non-Inverted	Tri-State	Tri-State, Non-Inverted
Voltage Supply Range	3V ~ 18V	3V ~ 18V	3V ~ 18V
Propagation Delay	50ns	50ns	50ns
Output Current (High/Low)	6.8mA / 6.8mA	6.8mA / 6.8mA	6.8mA / 6.8mA
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Package Type	16-DIP (0.300", 7.62mm)	16-TSSOP (0.173", 4.40mm)	16-DIP (0.300", 7.62mm)
Mounting Type	Through Hole	Surface Mount	Through Hole
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Through-Hole PCB Designs: CD4044BE-NG is the appropriate selection. This part maintains identical package form factor (16-DIP through-hole) and electrical specifications as the obsolete CD4043BE-NG, enabling direct board-level substitution without layout modifications. Active product status ensures manufacturing availability and supply chain continuity.

For Surface-Mount PCB Designs or New Designs: CD4043BPWR is the manufacturer-recommended substitute. This part delivers identical electrical performance with surface-mount 16-TSSOP packaging, reducing board footprint and supporting modern manufacturing processes. Active product status and full RoHS3 compliance support long-term production requirements.

Compliance Considerations: All substitute parts maintain ROHS3 compliance, ensuring regulatory alignment with current environmental standards. Selection between through-hole and surface-mount options should be determined by existing PCB design architecture and manufacturing capabilities.

Frequently Asked Questions (FAQ)

Q: Can CD4043BPWR directly replace CD4043BE-NG on existing PCBs?

A: CD4043BPWR provides electrical equivalence but differs in package type. CD4043BPWR uses 16-TSSOP surface-mount packaging while CD4043BE-NG uses 16-DIP through-hole packaging. Direct board-level substitution requires PCB redesign and rework. For existing through-hole designs, CD4044BE-NG is the appropriate substitute.

Q: What are the key electrical parameters that determine substitution compatibility?

A: Substitution compatibility is determined by: Logic Type (S-R Latch), Voltage Supply Range (3V ~ 18V), Propagation Delay (50ns), Output Current (6.8mA High/Low), and Operating Temperature Range (-55°C ~ 125°C). All listed substitutes meet these criteria.

Q: Why is CD4043BE-NG classified as obsolete?

A: Product status reflects manufacturer discontinuation. Active alternatives (CD4043BPWR and CD4044BE-NG) provide equivalent functionality with improved availability and manufacturing support.

Q: Are there differences in circuit configuration between the main part and substitutes?

A: CD4043BPWR differs in circuit configuration (1:1 with 4 independent circuits) compared to CD4043BE-NG (4:4 with 1 independent circuit). CD4044BE-NG maintains identical 4:4 circuit configuration. Functional equivalence is maintained through identical electrical performance parameters.

Q: What packaging considerations apply when selecting a substitute?

A: Package selection depends on PCB design architecture. Through-hole designs require 16-DIP packaging (CD4044BE-NG). Surface-mount designs or new designs benefit from 16-TSSOP packaging (CD4043BPWR), which reduces board area and supports automated assembly processes.

Q: Are all substitutes RoHS3 compliant?

A: Yes. CD4043BPWR and CD4044BE-NG both carry ROHS3 Compliant status, matching the compliance level of the original CD4043BE-NG.

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