CD4056BM Equivalent & Substitute Parts

Part Overview

The CD4056BM is a 7-segment LCD driver IC manufactured by Texas Instruments, designed to drive single-digit LCD displays using BCD interface logic. This device operates across a wide supply voltage range of 3V to 18V with minimal supply current of 40 nA, making it suitable for battery-powered and low-power applications. The CD4056BM is currently discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design requirements and production needs.

Substiute Parts

CD4056BM

Texas InstrumentsIn Stock: 1913CD4056BM Datasheet

Current PartRFQ

CD4056BM96

Texas InstrumentsIn Stock: 64395CD4056BM96 Datasheet

DirectRFQ

ICM7211AMIPLZ

Renesas Electronics CorporationIn Stock: 2235ICM7211AMIPLZ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the CD4056BM is evaluated based on the following critical parameters:

Primary Substitution Criteria:

• Display Type: LCD
• Configuration: 7 Segment
• Interface: BCD
• Voltage Supply Range: Compatibility with 3V ~ 18V operation
• Package Type: Surface Mount or Through Hole compatibility with application requirements
• RoHS Compliance: ROHS3 Compliant

Identified Substitute Categories:

1. Direct Equivalent (CD4056BM96): Identical electrical specifications, same manufacturer (Texas Instruments), same package type (16-SOIC), same base product number (CD4056), with active product status and higher inventory availability.

2. Functional Substitute (ICM7211AMIPLZ): Shares LCD 7-segment driver functionality with BCD interface. Differs in digit capacity (4 digits vs. 1 digit), mounting type (Through Hole vs. Surface Mount), package (40-DIP vs. 16-SOIC), voltage range (3V ~ 6V vs. 3V ~ 18V), and operating temperature range (-20°C ~ 85°C vs. -55°C ~ 125°C). Suitable for applications where multi-digit display capability and through-hole mounting are acceptable trade-offs.

Parameter Comparison

Engineering Selection Recommendations

CD4056BM96 Selection: The CD4056BM96 is the primary substitute for the discontinued CD4056BM. Both parts share identical electrical specifications, the same 16-SOIC surface-mount package, and equivalent RoHS3 compliance. The CD4056BM96 maintains active product status with significantly higher inventory availability (64,340 pieces), ensuring supply chain continuity. This part requires no design modifications and provides direct functional replacement.

ICM7211AMIPLZ Selection: The ICM7211AMIPLZ is a functional substitute suitable only for applications where design modifications are acceptable. This part introduces several parameter differences: 4-digit display capability (versus 1-digit), through-hole mounting (versus surface mount), reduced voltage supply range (3V ~ 6V versus 3V ~ 18V), narrower operating temperature range (-20°C ~ 85°C versus -55°C ~ 125°C), and higher supply current (10 µA versus 40 nA). Selection of this part requires confirmation that the application can accommodate these parameter variations and that the through-hole package is compatible with the PCB design.

Both substitute options maintain ROHS3 compliance and are currently in active production status.

Frequently Asked Questions (FAQ)

Q: Can CD4056BM96 be used as a direct replacement for CD4056BM? A: Yes. The CD4056BM96 is a direct equivalent with identical electrical specifications, package type, and functional performance. No design changes are required.

Q: What are the key differences between CD4056BM and ICM7211AMIPLZ? A: The ICM7211AMIPLZ differs in four critical areas: (1) digit capacity is 4 digits instead of 1 digit, (2) mounting type is through-hole instead of surface mount, (3) voltage supply range is limited to 3V ~ 6V instead of 3V ~ 18V, and (4) operating temperature range is -20°C ~ 85°C instead of -55°C ~ 125°C.

Q: Is the ICM7211AMIPLZ suitable for applications requiring the full 3V ~ 18V voltage range? A: No. The ICM7211AMIPLZ operates only within 3V ~ 6V. Applications requiring operation above 6V must use CD4056BM or CD4056BM96.

Q: Can ICM7211AMIPLZ be used in surface-mount applications? A: No. The ICM7211AMIPLZ is packaged in 40-DIP through-hole format. Surface-mount applications require CD4056BM or CD4056BM96 in 16-SOIC packaging.

Q: Are both substitute parts RoHS compliant? A: Yes. Both CD4056BM96 and ICM7211AMIPLZ are ROHS3 compliant, matching the compliance status of the original CD4056BM.

Q: Which substitute part has better inventory availability? A: CD4056BM96 has significantly higher inventory (64,340 pieces) compared to ICM7211AMIPLZ (2,211 pieces), providing superior supply chain reliability.