CD4543BPW Equivalent & Substitute Parts Reference Guide

Part Overview

The CD4543BPW is an IC LCD driver for one-digit, 7-segment displays, BCD interface, in a 16-TSSOP surface-mount package. Manufactured by Texas Instruments under the Power Management (PMIC) category, its key features include ultra-low supply current, support for wide supply voltage ranges, and extended operating temperatures. The CD4543BPW is classified as obsolete, necessitating the identification of substitute models that match critical electrical, mechanical, and compliance parameters for continued production and service support.

Substiute Parts

CD4543BPW

Texas InstrumentsIn Stock: 2998CD4543BPW Datasheet

Current PartRFQ

CD4543BPWR

Texas InstrumentsIn Stock: 2491CD4543BPWR Datasheet

MFR RecommendedRFQ

CD4056BPW

Texas InstrumentsIn Stock: 2786CD4056BPW Datasheet

Parametric EquivalentRFQ

ICM7211AMIPLZ

Renesas Electronics CorporationIn Stock: 2235ICM7211AMIPLZ Datasheet

MFR RecommendedRFQ

CD4055BPW

Texas InstrumentsIn Stock: 2310CD4055BPW Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute candidates must match the key parameters specified for the CD4543BPW. These are:

• Category: Power Management (PMIC)
• Display Type: LCD
• Configuration: 7 Segment
• Interface: BCD
• Digits or Characters: 1 Digit
• Current - Supply: 40 nA
• Voltage - Supply: 3V ~ 18V
• Operating Temperature: -55°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 16-TSSOP (0.173", 4.40mm Width)
• Supplier Device Package: 16-TSSOP
• Compliance: ROHS3, MSL 1, REACH Unaffected

Substitute grouping is strictly limited to parts that meet all these stated parameters.

Parameter Comparison

Engineering Selection Recommendations

Engineers must select substitute or equivalent parts strictly on the basis of product lifecycle status and regulatory compliance. The CD4543BPW is obsolete. Suitable alternatives must be active, match all listed key parameters, and hold identical certifications, including ROHS3 and REACH compliance with unlimited moisture sensitivity rating. Substitute models CD4543BPWR, CD4056BPW, and CD4055BPW meet all stated operational, electrical, mechanical, and compliance requirements for direct substitution. ICM7211AMIPLZ differs in pin count, digit count, mounting type, supply current, supply voltage, and operating temperature range and therefore falls outside strict parametric equivalence.

Frequently Asked Questions (FAQ)

Q: Which substitute parts are direct electrical and mechanical equivalents for CD4543BPW?
A: CD4543BPWR, CD4056BPW, and CD4055BPW match all required operational and package parameters and are mechanically and electrically equivalent for direct replacement.

Q: How do device packages affect compatibility?
A: Only substitutes in a 16-TSSOP surface-mount format are directly compatible with the original CD4543BPW pad layout and automated assembly processes.

Q: Why is ICM7211AMIPLZ not a direct substitute?
A: ICM7211AMIPLZ differs in digits (4 vs. 1), package (40-DIP through-hole vs. 16-TSSOP surface-mount), supply current, voltage range, and operating temperature; it cannot replace CD4543BPW without redesign.

Q: What compliance and certification must a substitute meet?
A: Substitute parts must be ROHS3 compliant, have an MSL rating of 1 (Unlimited), and be REACH unaffected, as defined in the provided parameters.

Q: Is series matching required for substitution?
A: No series designation is imposed in the parameters. Functional and package equivalence overrides any series grouping for these models.

Q: Can active status substitutes be used without additional qualification?
A: Yes; substitutes that are active and meet all parameters listed can be used without further qualification under these criteria.