CD4056BMT Equivalent & Substitute Parts

Part Overview

The CD4056BMT is a 7-segment LCD driver IC manufactured by Texas Instruments, designed to drive single-digit LCD displays using BCD interface logic. This Surface Mount device operates across a wide voltage range of 3V to 18V with minimal supply current of 40 nA, making it suitable for battery-powered applications requiring low power consumption.

The CD4056BMT is currently discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design requirements and production needs. Alternative parts must maintain functional compatibility with the BCD input interface and 7-segment LCD output configuration while accommodating potential differences in packaging, mounting technology, and operational specifications.

Substiute Parts

CD4056BMT

Texas InstrumentsIn Stock: 2165CD4056BMT 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 logic for the CD4056BMT is based on the following critical parameters that determine functional and physical compatibility:

Primary Compatibility Criteria:

• Display Type: LCD
• Configuration: 7 Segment
• Interface: BCD
• Voltage Supply Range: Minimum 3V to 18V overlap required
• RoHS3 Compliance: Required for regulatory alignment

Secondary Considerations:

• Mounting Type: Surface Mount preferred for direct PCB replacement
• Package compatibility: 16-SOIC standard for drop-in substitution
• Operating Temperature Range: Must encompass application requirements
• Supply Current: Lower values indicate improved power efficiency

The CD4056BM96 serves as a direct equivalent, maintaining identical electrical specifications and package format while offering improved availability in active production status. The ICM7211AMIPLZ represents a functional alternative with different packaging and digit capacity, suitable for applications where mounting technology and display requirements can accommodate through-hole implementation and multi-digit operation.

Parameter Comparison

Engineering Selection Recommendations

CD4056BM96 (Direct Equivalent): This part is the preferred substitute for CD4056BMT applications. It maintains identical electrical specifications, package format, and mounting technology. The CD4056BM96 is in active production status with substantial inventory availability, ensuring supply chain continuity. Both parts are ROHS3 compliant with equivalent moisture sensitivity ratings, supporting seamless integration into existing designs without PCB modifications.

ICM7211AMIPLZ (Functional Alternative): This Renesas device provides BCD-interface 7-segment LCD driver functionality with extended multi-digit capability (4 digits versus 1 digit). Selection of this part requires design accommodation for through-hole mounting and 40-DIP package format. The reduced voltage supply range (3V to 6V) and narrower operating temperature range (-20°C to 85°C) necessitate verification against application requirements. The higher supply current (10 µA) impacts power budget calculations. This option is suitable for applications where multi-digit display capability and through-hole mounting are advantageous.

Frequently Asked Questions (FAQ)

Q: Can CD4056BM96 replace CD4056BMT without PCB modifications? A: Yes. Both parts share identical package format (16-SOIC), mounting type (Surface Mount), and electrical specifications. Direct substitution on existing PCBs is possible without layout changes.

Q: What are the key differences between CD4056BM96 and ICM7211AMIPLZ? A: The primary differences are mounting technology (Surface Mount versus Through Hole), package size (16-SOIC versus 40-DIP), digit capacity (1 digit versus 4 digits), voltage range (3V-18V versus 3V-6V), and supply current (40 nA versus 10 µA). BCD interface compatibility is maintained across both parts.

Q: Is ICM7211AMIPLZ suitable for single-digit applications? A: Yes, the ICM7211AMIPLZ can drive single-digit displays. However, its 4-digit capability and through-hole package make it less efficient for single-digit-only designs. Use CD4056BM96 for optimized single-digit applications.

Q: What is the voltage supply constraint for ICM7211AMIPLZ? A: The ICM7211AMIPLZ operates within 3V to 6V, which is narrower than the CD4056BMT range of 3V to 18V. Applications requiring voltages above 6V cannot use this part without external voltage regulation.

Q: Are all three parts RoHS3 compliant? A: Yes. CD4056BMT, CD4056BM96, and ICM7211AMIPLZ are all ROHS3 compliant with MSL rating of 1 (Unlimited), meeting environmental and regulatory requirements.

Q: Which part offers the best availability? A: CD4056BM96 is in active production status with 64,340 pieces in stock, providing superior supply chain reliability compared to the discontinued CD4056BMT.