CD4543BMT LCD Driver 7-Segment 1-Digit Equivalent & Substitute Parts

Part Overview

The CD4543BMT is a 7-segment LCD driver IC manufactured by Texas Instruments in a 16-SOIC surface mount package. This part is discontinued at DiGi Electronics but remains available through alternative sources. The CD4543BMT is designed to drive single-digit LCD displays using BCD (Binary-Coded Decimal) interface logic. Due to its discontinued status, equivalent substitute parts from active manufacturers are necessary for new designs and production continuity.

Substiute Parts

CD4543BMT

Texas InstrumentsIn Stock: 5466CD4543BMT Datasheet

Current PartRFQ

CD4543BM96

Texas InstrumentsIn Stock: 35461CD4543BM96 Datasheet

DirectRFQ

MC14543BDR2G

onsemiIn Stock: 53140MC14543BDR2G Datasheet

DirectRFQ

HEF4543BT,653

Nexperia USA Inc.In Stock: 2921HEF4543BT,653 Datasheet

MFR RecommendedRFQ

ICM7211AMIPLZ

Renesas Electronics CorporationIn Stock: 2235ICM7211AMIPLZ Datasheet

MFR RecommendedRFQ

MC14543BDG

onsemiIn Stock: 1385MC14543BDG Datasheet

MFR RecommendedRFQ

NLV14543BDR2G

onsemiIn Stock: 3714NLV14543BDR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CD4543BMT are selected based on the following critical parameters that determine functional compatibility:

Primary Substitution Criteria:

• Display Type: LCD (primary function)
• Configuration: 7 Segment
• Interface: BCD
• Package / Case: 16-SOIC (0.154", 3.90mm Width)
• Mounting Type: Surface Mount
• Voltage - Supply: 3V ~ 18V (minimum overlap requirement)
• Operating Temperature: -55°C ~ 125°C (or compatible subset)
• RoHS Status: ROHS3 Compliant

Substitution Categories:

Direct Pin-Compatible Substitutes (16-SOIC, 1-Digit, BCD Interface):

• CD4543BM96 (Texas Instruments) - Same base product, different packaging
• MC14543BDR2G (onsemi) - Equivalent functionality, active product status
• MC14543BDG (onsemi) - Equivalent functionality, tube packaging
• NLV14543BDR2G (onsemi) - Equivalent functionality, active product status
• HEF4543BT,653 (Nexperia USA Inc.) - Equivalent functionality, supports LED/LCD

Functional Equivalent with Different Package (40-DIP, 4-Digit):

• ICM7211AMIPLZ (Renesas Electronics Corporation) - Different package and digit count; requires circuit redesign

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (No Circuit Redesign Required):

Select from CD4543BM96, MC14543BDR2G, MC14543BDG, NLV14543BDR2G, or HEF4543BT,653 when the application requires a 16-SOIC surface mount package with 1-digit 7-segment LCD driver functionality. All candidates maintain ROHS3 compliance and active product status.

CD4543BM96 is the preferred direct substitute from Texas Instruments, maintaining identical electrical specifications and package footprint. MC14543BDR2G and NLV14543BDR2G from onsemi provide equivalent functionality with active product status and full voltage range support (3V ~ 18V). HEF4543BT,653 from Nexperia supports both LED and LCD display types, with voltage range limited to 3V ~ 15V and operating temperature range of -40°C ~ 85°C.

For Applications Requiring Extended Temperature Range:

CD4543BM96, MC14543BDR2G, or MC14543BDG maintain the full -55°C ~ 125°C operating temperature range of the original CD4543BMT. HEF4543BT,653 operates within -40°C ~ 85°C, which may be insufficient for industrial or automotive applications requiring the full extended range.

For Applications with Different Package Requirements:

ICM7211AMIPLZ from Renesas Electronics is a 40-DIP through-hole package supporting 4-digit LCD display control. This part requires complete circuit redesign and is not a pin-compatible substitute. Selection of this part is appropriate only when the application architecture supports through-hole mounting and multi-digit display requirements.

Packaging Considerations:

CD4543BM96 is available in Cut Tape and Digi-Reel packaging. MC14543BDR2G and NLV14543BDR2G are supplied in Tape & Reel format. MC14543BDG and ICM7211AMIPLZ are supplied in Tube packaging. Select packaging based on production volume and assembly line requirements.

Frequently Asked Questions (FAQ)

Q: Can I use CD4543BM96 as a direct replacement for CD4543BMT?

A: Yes. CD4543BM96 is manufactured by Texas Instruments and maintains identical electrical specifications, package footprint (16-SOIC), and functional characteristics. The primary difference is packaging format (Cut Tape & Digi-Reel versus Tape & Reel). Pin configuration and performance are equivalent.

Q: What is the difference between MC14543BDR2G and MC14543BDG?

A: Both parts are manufactured by onsemi and provide equivalent LCD driver functionality. The primary difference is packaging: MC14543BDR2G is supplied in Tape & Reel format, while MC14543BDG is supplied in Tube format. Electrical specifications and 16-SOIC package footprint are identical.

Q: Why is HEF4543BT,653 listed as a substitute if it supports LED and LCD?

A: HEF4543BT,653 from Nexperia maintains the same 16-SOIC package, 7-segment configuration, and BCD interface as the CD4543BMT. The addition of LED support does not affect LCD-only applications. However, the voltage supply range is limited to 3V ~ 15V (versus 3V ~ 18V for CD4543BMT) and operating temperature range is -40°C ~ 85°C (versus -55°C ~ 125°C). Verify these parameters are compatible with your application before selection.

Q: Can I use ICM7211AMIPLZ as a substitute for CD4543BMT?

A: ICM7211AMIPLZ is not a pin-compatible substitute. It uses a 40-DIP through-hole package and supports 4-digit LCD display control, compared to the 16-SOIC surface mount package and 1-digit configuration of CD4543BMT. Selection of ICM7211AMIPLZ requires complete circuit redesign and is appropriate only for applications with different package and digit count requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts (CD4543BM96, MC14543BDR2G, MC14543BDG, NLV14543BDR2G, HEF4543BT,653, and ICM7211AMIPLZ) are ROHS3 compliant and REACH unaffected.

Q: What is the minimum voltage supply requirement for each substitute?

A: All 16-SOIC substitutes (CD4543BM96, MC14543BDR2G, MC14543BDG, NLV14543BDR2G, and HEF4543BT,653) support 3V minimum supply voltage. ICM7211AMIPLZ also supports 3V minimum. Maximum voltage ratings vary: CD4543BM96, MC14543BDR2G, MC14543BDG, and NLV14543BDR2G support 18V; HEF4543BT,653 supports 15V; ICM7211AMIPLZ supports 6V.

Q: Which substitute has the lowest supply current?

A: CD4543BMT and CD4543BM96 both specify 40 nA supply current. MC14543BDR2G, MC14543BDG, and ICM7211AMIPLZ specify 10 µA supply current. NLV14543BDR2G and HEF4543BT,653 do not specify supply current in the provided data.

Q: What is the operating temperature range for each substitute?

A: CD4543BM96, MC14543BDR2G, and MC14543BDG support -55°C ~ 125°C. NLV14543BDR2G supports -55°C ~ 125°C. HEF4543BT,653 supports -40°C ~ 85°C. ICM7211AMIPLZ supports -20°C ~ 85°C. Select based on your application's thermal requirements.