PCF1175CT/S420/2:1 Equivalent & Substitute Parts

Part Overview

The PCF1175CT/S420/2:1 is a 7-segment LCD driver manufactured by NXP USA Inc., designed to control 4-digit display configurations. This component is classified as obsolete, making equivalent and substitute parts necessary for new designs, maintenance applications, and production continuity. The part operates across a 3V to 6V supply range with low current consumption of 950 µA, suitable for battery-powered and portable display applications.

Substiute Parts

PCF1175CT/S420/2:1

NXP USA Inc.In Stock: 687PCF1175CT/S420/2:1 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 PCF1175CT/S420/2:1 is determined by the following critical parameters:

• Display Type: LCD driver functionality
• Configuration: 7-segment display control
• Voltage Supply Range: 3V ~ 6V compatibility
• Mounting Type: Surface mount or through-hole alternatives
• Package compatibility: Pin count and electrical interface alignment
• Operating Temperature Range: Minimum -40°C to 85°C coverage
• RoHS and regulatory compliance: ROHS3 Compliant status

The substitute parts identified (ICM7224IPL+ and TC7126ACKW) share the core LCD 7-segment driver functionality and operate within compatible voltage ranges. However, each substitute presents distinct trade-offs in digit capacity, current consumption, temperature range, and physical packaging that must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

ICM7224IPL+ Substitution: This part is recommended for applications requiring active product status and extended low-temperature operation down to -20°C. The ICM7224IPL+ offers superior current efficiency at 10 µA versus the original 950 µA, making it suitable for battery-powered applications. Voltage supply compatibility (3V ~ 6V) matches the original specification. The through-hole 40-DIP package requires PCB redesign compared to the surface-mount original. The 4.5-digit capacity exceeds the original 4-digit specification, providing additional display flexibility. All parts maintain ROHS3 compliance and unlimited moisture sensitivity rating.

TC7126ACKW Substitution: This part is suitable for applications where surface-mount packaging is required and digit capacity reduction is acceptable. The TC7126ACKW operates at 9V supply voltage, which differs from the original 3V ~ 6V range and requires circuit redesign. Operating temperature range (0°C ~ 70°C) is narrower than the original specification. The 44-QFP surface-mount package maintains form factor compatibility with the original. Moisture sensitivity level 3 (168 hours) requires controlled storage conditions compared to the original unlimited rating. Product status is active with ROHS3 compliance maintained.

Frequently Asked Questions (FAQ)

Q: Can ICM7224IPL+ directly replace PCF1175CT/S420/2:1 without PCB modification? A: No. The ICM7224IPL+ uses a 40-DIP through-hole package versus the original 28-SOIC surface-mount package. PCB redesign is required. Pin configuration and electrical interface must be verified against application schematics.

Q: What is the primary limitation of TC7126ACKW as a substitute? A: The TC7126ACKW operates at 9V supply voltage, whereas the original part requires 3V ~ 6V. Circuit redesign is necessary to accommodate this voltage difference. Additionally, the operating temperature range (0°C ~ 70°C) does not extend to the original -40°C minimum specification.

Q: Which substitute offers the best power efficiency? A: The ICM7224IPL+ consumes 10 µA compared to the original 950 µA, representing a 95-fold reduction in supply current. This makes it the optimal choice for battery-powered and low-power applications.

Q: Are all substitute parts RoHS compliant? A: Yes. Both ICM7224IPL+ and TC7126ACKW maintain ROHS3 compliance, matching the original part's regulatory status.

Q: What is the difference in digit capacity between the original and substitutes? A: The original PCF1175CT/S420/2:1 controls 4 digits. The ICM7224IPL+ supports 4.5 digits, and the TC7126ACKW supports 4.6 digits. Application requirements determine whether increased or decreased digit capacity is acceptable.

Q: Does moisture sensitivity differ between these parts? A: Yes. The original and ICM7224IPL+ both have MSL 1 (unlimited storage). The TC7126ACKW has MSL 3 (168 hours), requiring controlled humidity storage conditions and limiting shelf life.

Q: Which substitute maintains the closest operating temperature range to the original? A: The ICM7224IPL+ operates from -20°C ~ 85°C, which covers the upper portion of the original -40°C ~ 85°C range. The TC7126ACKW (0°C ~ 70°C) has the most restricted temperature range.