PCF1179CT,118 Equivalent & Substitute Parts

Part Overview

The PCF1179CT,118 is a 7-segment LCD driver IC manufactured by NXP Semiconductors, designed to drive 4-digit LCD displays. This component is classified as a Power Management (PMIC) device and is currently listed as obsolete. The product operates within a 3V to 6V supply voltage range with a supply current of 950 µA and supports operating temperatures from -40°C to 85°C. Due to its obsolete status, identifying functionally equivalent substitute parts is essential for ongoing system design, maintenance, and production continuity.

Substiute Parts

PCF1179CT,118

NXP SemiconductorsIn Stock: 931PCF1179CT,118 Datasheet

Current PartRFQ

ICM7224IPL+

Analog Devices Inc./Maxim IntegratedIn Stock: 915ICM7224IPL+ Datasheet

MFR RecommendedRFQ

TC7126ACKW

Microchip TechnologyIn Stock: 1093TC7126ACKW Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PCF1179CT,118 is determined by the following critical parameters:

Primary Compatibility Criteria:

• Display Type: LCD
• Configuration: 7 Segment
• Voltage Supply Range: 3V ~ 6V (or compatible subset)
• RoHS3 Compliance: Required
• REACH Unaffected Status: Required

Secondary Considerations:

• Digit capacity (4 digits minimum for direct replacement; higher digit counts acceptable with design adaptation)
• Mounting type (surface mount preferred for PCB compatibility; through-hole requires board redesign)
• Operating temperature range (-40°C to 85°C preferred; narrower ranges acceptable if application requirements permit)
• Package footprint (28-SOIC is the baseline; alternative packages require PCB layout modification)

The substitute parts identified below meet the primary compatibility criteria and maintain functional equivalence for LCD 7-segment display driving applications.

Parameter Comparison

Engineering Selection Recommendations

ICM7224IPL+ (Analog Devices Inc./Maxim Integrated)

This substitute is active in production and maintains full compliance with ROHS3 and REACH requirements. It supports the same 3V to 6V supply voltage range as the PCF1179CT,118 and offers superior current efficiency at 10 µA versus 950 µA. The 4.5-digit capacity exceeds the original 4-digit specification, providing additional display capability. However, the 40-DIP through-hole package requires PCB layout redesign compared to the original 28-SOIC surface mount configuration. The operating temperature range of -20°C to 85°C is narrower than the original specification; applications requiring -40°C operation must evaluate this limitation.

TC7126ACKW (Microchip Technology)

This substitute is active in production and maintains ROHS3 and REACH compliance. The 44-QFP surface mount package preserves PCB compatibility advantages over through-hole alternatives. However, this device operates at 9V supply voltage, which is incompatible with the original 3V to 6V specification and requires power supply redesign. The 4.6-digit capacity is lower than the original 4-digit specification. The operating temperature range of 0°C to 70°C is narrower than the original -40°C to 85°C range. The Moisture Sensitivity Level of 3 (168 Hours) requires more stringent handling compared to the original MSL 1 rating.

Frequently Asked Questions (FAQ)

Q: Can the ICM7224IPL+ directly replace the PCF1179CT,118 without PCB modification?

A: No. While the ICM7224IPL+ maintains electrical compatibility (3V to 6V supply, 7-segment LCD driver function), it uses a 40-DIP through-hole package versus the original 28-SOIC surface mount package. PCB layout redesign is required. Additionally, the operating temperature range is limited to -20°C to 85°C; applications requiring -40°C operation must verify compatibility.

Q: Is the TC7126ACKW suitable as a substitute?

A: The TC7126ACKW is not recommended as a direct substitute due to fundamental incompatibilities. The 9V supply voltage requirement conflicts with the original 3V to 6V specification, necessitating power supply redesign. The 4.6-digit capacity is lower than the original 4-digit specification. The narrower operating temperature range (0°C to 70°C) and higher Moisture Sensitivity Level (3) introduce additional constraints.

Q: What are the key parameters that determine substitution compatibility?

A: Substitution compatibility is determined by: Display Type (LCD), Configuration (7 Segment), Voltage Supply Range (3V to 6V or compatible subset), RoHS3 Compliance, and REACH Unaffected status. Secondary factors include digit capacity, mounting type, operating temperature range, and package footprint.

Q: Does the higher digit count of the ICM7224IPL+ (4.5 digits versus 4 digits) affect compatibility?

A: Higher digit capacity does not prevent substitution; the additional display capability can be utilized or left unused depending on application requirements. However, the different package type and narrower temperature range must be evaluated for your specific application.

Q: What is the impact of the different Moisture Sensitivity Levels?

A: The PCF1179CT,118 has MSL 1 (Unlimited), while the TC7126ACKW has MSL 3 (168 Hours). MSL 3 requires more stringent moisture control during storage and handling. The ICM7224IPL+ maintains MSL 1, matching the original specification.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. Both the ICM7224IPL+ and TC7126ACKW are ROHS3 Compliant and REACH Unaffected, matching the original PCF1179CT,118 compliance status.