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PCF1179CT,112 Equivalent & Substitute Parts
Part Overview
The PCF1179CT,112 is a 7-segment LCD driver IC manufactured by NXP USA Inc., designed to drive 4-digit LCD displays. This Surface Mount device operates across a 3V to 6V supply range with minimal current consumption of 950 µA. The part is classified as Obsolete, making equivalent and substitute components necessary for new designs and production continuity. Substitute parts must maintain functional compatibility with 7-segment LCD display driving while accommodating different packaging and performance characteristics.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Display Type | LCD |
| Configuration | 7 Segment |
| Digits or Characters | 4 Digits |
| Voltage - Supply | 3V ~ 6V |
| Current - Supply | 950 µA |
| Operating Temperature | -40°C ~ 85°C |
| Mounting Type | Surface Mount |
| Package / Case | 28-SOIC (0.295", 7.50mm Width) |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution for the PCF1179CT,112 is determined by the following critical parameters:
- Display Interface: 7-segment LCD driver functionality
- Digit Capacity: Minimum 4-digit display support
- Supply Voltage Range: 3V to 6V compatibility
- Operating Temperature: Support for -40°C to 85°C range
- Regulatory Compliance: ROHS3 and REACH compliance
The identified substitute parts maintain core LCD driver functionality but differ in digit capacity, mounting technology, and package form factor. ICM7224IPL+ supports 4.5-digit displays with Through Hole mounting, while TC7126ACKW supports 4.6-digit displays with Surface Mount technology. Both substitutes are Active products with current manufacturer support.
Parameter Comparison
| Parameter | PCF1179CT,112 | ICM7224IPL+ | TC7126ACKW |
|---|---|---|---|
| Manufacturer | NXP USA Inc. | Analog Devices Inc./Maxim Integrated | Microchip Technology |
| Product Status | Obsolete | Active | Active |
| Display Type | LCD | LCD | LCD |
| Configuration | 7 Segment | 7 Segment | 7 Segment |
| Digits or Characters | 4 Digits | 4.5 Digits | 4.6 Digits |
| Voltage - Supply | 3V ~ 6V | 3V ~ 6V | 9V |
| Current - Supply | 950 µA | 10 µA | Not Specified |
| Operating Temperature | -40°C ~ 85°C | -20°C ~ 85°C | 0°C ~ 70°C |
| Mounting Type | Surface Mount | Through Hole | Surface Mount |
| Package / Case | 28-SOIC | 40-DIP | 44-QFP |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| MSL Rating | 1 (Unlimited) | 1 (Unlimited) | 3 (168 Hours) |
Engineering Selection Recommendations
ICM7224IPL+ Substitution: This part is suitable for applications requiring 4.5-digit display capability with extended temperature range support down to -20°C. The significantly lower supply current (10 µA vs. 950 µA) provides power efficiency advantages. However, the Through Hole mounting requires PCB redesign from the original Surface Mount configuration. This substitute is Active with full manufacturer support and ROHS3 compliance.
TC7126ACKW Substitution: This part maintains Surface Mount technology, eliminating PCB layout redesign requirements. However, it supports only 4.6-digit displays, reducing display capacity compared to the original 4-digit specification. The 9V supply voltage requirement differs from the 3V-6V range of the original part, necessitating power supply circuit modifications. Operating temperature range is limited to 0°C to 70°C. This substitute is Active with ROHS3 compliance but carries MSL Level 3 moisture sensitivity.
Selection between substitutes depends on application requirements: prioritize ICM7224IPL+ for digit capacity and temperature range; prioritize TC7126ACKW only if Surface Mount packaging is mandatory and 4.6-digit display capacity is acceptable.
Frequently Asked Questions (FAQ)
Q: Can ICM7224IPL+ directly replace PCF1179CT,112 without PCB modifications?
A: No. ICM7224IPL+ uses 40-DIP Through Hole packaging versus the original 28-SOIC Surface Mount package. PCB footprint and layout redesign is required.
Q: What is the primary limitation of TC7126ACKW as a substitute?
A: TC7126ACKW supports only 4.6-digit displays compared to the original 4-digit specification, and requires 9V supply voltage instead of the 3V-6V range. Operating temperature range is also reduced to 0°C to 70°C.
Q: Are both substitute parts compliant with RoHS3 and REACH regulations?
A: Yes. Both ICM7224IPL+ and TC7126ACKW are ROHS3 Compliant and REACH Unaffected, matching the original part's regulatory status.
Q: Which substitute offers better power efficiency?
A: ICM7224IPL+ consumes 10 µA supply current compared to 950 µA for the original PCF1179CT,112, providing significant power efficiency improvement.
Q: What is the moisture sensitivity consideration for TC7126ACKW?
A: TC7126ACKW carries MSL Level 3 (168 Hours) rating, requiring controlled storage and handling conditions. The original part and ICM7224IPL+ both have MSL Level 1 (Unlimited) ratings.
Q: Can TC7126ACKW operate within the original 3V-6V supply range?
A: No. TC7126ACKW requires 9V supply voltage and cannot operate within the original 3V-6V specification.
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