CD4055BPWR Equivalent & Substitute Parts

Part Overview

The CD4055BPWR 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 applications. The part is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and production continuity.

Substiute Parts

CD4055BPWR

Texas InstrumentsIn Stock: 945CD4055BPWR Datasheet

Current PartRFQ

CD4055BPW

Texas InstrumentsIn Stock: 2310CD4055BPW Datasheet

MFR RecommendedRFQ

ICM7211AMIPLZ

Renesas Electronics CorporationIn Stock: 2235ICM7211AMIPLZ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the CD4055BPWR is determined by the following critical parameters:

• Display Type & Configuration: Both substitute parts maintain LCD 7-segment driver functionality
• Interface Protocol: BCD input interface compatibility
• Supply Voltage Range: Operating voltage envelope must accommodate the original specification
• Mounting Technology: Surface mount vs. through-hole considerations for PCB integration
• Package Compatibility: Physical form factor and pin count alignment
• Product Status: Active alternatives ensure long-term availability

The CD4055BPW serves as a direct form-fit-function replacement, maintaining identical electrical specifications and packaging. The ICM7211AMIPLZ represents a functional alternative with different packaging and digit capacity, suitable for applications where through-hole mounting and multi-digit display capability are acceptable trade-offs.

Parameter Comparison

Engineering Selection Recommendations

CD4055BPW is the primary recommended substitute for CD4055BPWR. Both parts are manufactured by Texas Instruments, share identical electrical specifications, and utilize the same 16-TSSOP surface-mount package. The CD4055BPW maintains active product status with confirmed inventory availability, ensuring supply chain continuity. This substitution requires no circuit redesign or PCB layout modifications.

ICM7211AMIPLZ is a functional alternative manufactured by Renesas Electronics Corporation. This part maintains BCD interface compatibility and LCD 7-segment driver functionality but introduces the following design considerations: through-hole mounting technology (40-DIP package), reduced supply voltage range (3V to 6V maximum), narrower operating temperature range (-20°C to 85°C), and multi-digit capability (4 digits). Selection of this alternative is appropriate only when through-hole mounting is preferred and the reduced voltage and temperature specifications align with application requirements.

Both substitute parts maintain ROHS3 compliance and MSL Level 1 rating, consistent with the original CD4055BPWR specifications.

Frequently Asked Questions (FAQ)

Q: Can CD4055BPW directly replace CD4055BPWR without circuit modifications?

A: Yes. The CD4055BPW is electrically and mechanically identical to CD4055BPWR, utilizing the same 16-TSSOP package, supply voltage range (3V to 18V), operating temperature range (-55°C to 125°C), and BCD interface protocol. No PCB layout or schematic changes are required.

Q: What are the key differences between CD4055BPW and ICM7211AMIPLZ?

A: The primary differences are: (1) Mounting technology—CD4055BPW uses surface-mount TSSOP packaging while ICM7211AMIPLZ uses through-hole DIP packaging; (2) Digit capacity—CD4055BPW drives 1 digit while ICM7211AMIPLZ drives 4 digits; (3) Supply voltage—CD4055BPW operates 3V to 18V while ICM7211AMIPLZ operates 3V to 6V; (4) Operating temperature—CD4055BPW operates -55°C to 125°C while ICM7211AMIPLZ operates -20°C to 85°C; (5) Supply current—CD4055BPW draws 40 nA while ICM7211AMIPLZ draws 10 µA.

Q: Is ICM7211AMIPLZ suitable for applications requiring the full -55°C to 125°C temperature range?

A: No. The ICM7211AMIPLZ operating temperature range is limited to -20°C to 85°C. Applications requiring operation below -20°C or above 85°C must use CD4055BPW or CD4055BPWR.

Q: Can ICM7211AMIPLZ operate at supply voltages above 6V?

A: No. The ICM7211AMIPLZ maximum supply voltage is 6V. Applications requiring operation above 6V must use CD4055BPW or CD4055BPWR, which support up to 18V.

Q: Are all three parts RoHS compliant?

A: Yes. CD4055BPWR, CD4055BPW, and ICM7211AMIPLZ are all ROHS3 compliant with MSL Level 1 rating.