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PCA9514AD,112 Equivalent & Substitute Parts
Part Overview
The PCA9514AD,112 is an I2C/SMBus buffer and accelerator manufactured by NXP USA Inc., designed for hotswap applications with a single channel operating at 400kHz maximum data rate. This component is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. The part is housed in an 8-SOIC package and operates across a 2.7V to 5.5V supply voltage range with ROHS3 compliance.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | PCA9514AD,112 |
| Manufacturer | NXP USA Inc. |
| Product Status | Obsolete |
| Type | Buffer, Accelerator |
| Applications | I2C - Hotswap |
| Number of Channels | 1 |
| Data Rate (Max) | 400kHz |
| Voltage - Supply | 2.7V ~ 5.5V |
| Current - Supply | 4.6mA |
| Operating Temperature | -40°C ~ 85°C |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution for the PCA9514AD,112 is determined by the following critical parameters:
Primary Compatibility Criteria:
- Type: Buffer, Accelerator for I2C/SMBus applications
- Applications: I2C - Hotswap capability
- Number of Channels: 1 channel
- Input/Output: 2-Wire Bus configuration
- Voltage Supply Range: Minimum 2.7V support with upper range compatibility
- Operating Temperature: Support for -40°C to 85°C range
- RoHS Compliance: ROHS3 Compliant status
Secondary Considerations:
- Data Rate capability (400kHz preferred for full compatibility)
- Package form factor (8-SOIC preferred; alternative packages acceptable with PCB redesign)
- Current consumption specifications
- Capacitance characteristics
Substitute parts are grouped into two categories: direct package equivalents (8-SOIC) and alternative package solutions (SOT-23-5, 8-DFN) that require board-level modifications.
Parameter Comparison
| Parameter | PCA9514AD,112 | TCA4311ADR | LTC1694-1CS5#TRMPBF | LTC1694-1IS5#TRMPBF | LTC4313CDD-1#PBF |
|---|---|---|---|---|---|
| Manufacturer | NXP USA Inc. | Texas Instruments | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc. |
| Product Status | Obsolete | Active | Active | Active | Active |
| Type | Buffer, Accelerator | Buffer, Accelerator | Buffer, Accelerator | Buffer, Accelerator | Buffer, Accelerator |
| Applications | I2C - Hotswap | I2C - Hotswap | I2C | I2C | I2C - Hotswap |
| Number of Channels | 1 | 1 | 1 | 1 | 1 |
| Data Rate (Max) | 400kHz | — | 100kHz | 400kHz | 400kHz |
| Voltage - Supply | 2.7V ~ 5.5V | 2.7V ~ 5.5V | 2.7V ~ 6V | 2.7V ~ 6V | 2.9V ~ 5.5V |
| Current - Supply | 4.6mA | 5.1mA | 60µA | 60µA | 8.1mA |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C | 0°C ~ 70°C | -40°C ~ 85°C | 0°C ~ 70°C |
| Package / Case | 8-SOIC | 8-SOIC | SOT-23-5 | SOT-23-5 | 8-DFN (3x3) |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
Engineering Selection Recommendations
Direct Package Replacement (8-SOIC):
TCA4311ADR from Texas Instruments is the primary direct substitute. It maintains the same 8-SOIC package footprint, identical supply voltage range (2.7V ~ 5.5V), and full operating temperature range (-40°C ~ 85°C). Both components are ROHS3 compliant with MSL 1 rating. This part requires no PCB modifications and provides the most straightforward migration path.
Alternative Package Solutions (SOT-23-5):
LTC1694-1IS5#TRMPBF and LTC1694-1IS5#TRPBF from Analog Devices Inc. offer 400kHz data rate capability matching the original part's performance specification. These parts support the full -40°C to 85°C operating temperature range and maintain ROHS3 compliance. However, the SOT-23-5 package requires PCB redesign. The LTC1694 series demonstrates significantly lower current consumption (60µA versus 4.6mA), providing power efficiency benefits in battery-powered applications.
Alternative Package Solution (8-DFN):
LTC4313CDD-1#PBF from Analog Devices Inc. provides hotswap capability with 400kHz data rate in an 8-DFN (3x3) package. This part is active and ROHS3 compliant but operates within a narrower supply voltage range (2.9V ~ 5.5V) and limited temperature range (0°C ~ 70°C). PCB layout modifications are required for this package transition.
Selection Criteria by Application:
- For designs requiring no PCB changes: Select TCA4311ADR
- For power-constrained applications with PCB redesign capability: Select LTC1694-1IS5#TRMPBF or LTC1694-1IS5#TRPBF
- For compact form factor with hotswap support: Select LTC4313CDD-1#PBF (verify temperature and voltage requirements)
Frequently Asked Questions (FAQ)
Q: Can TCA4311ADR be used as a direct drop-in replacement for PCA9514AD,112?
A: Yes. TCA4311ADR shares the identical 8-SOIC package footprint, supply voltage range (2.7V ~ 5.5V), and full operating temperature range (-40°C ~ 85°C). No PCB modifications are required. Both components are ROHS3 compliant with MSL 1 rating.
Q: What is the key difference between LTC1694-1CS5#TRMPBF and LTC1694-1IS5#TRMPBF?
A: The primary difference is operating temperature range. LTC1694-1CS5#TRMPBF operates from 0°C to 70°C, while LTC1694-1IS5#TRMPBF operates from -40°C to 85°C. For applications requiring the full industrial temperature range of the original PCA9514AD,112, select the LTC1694-1IS5 variant.
Q: Why do LTC1694 parts consume significantly less current than the original part?
A: The LTC1694 series is designed with lower power consumption (60µA) compared to the PCA9514AD,112 (4.6mA). This is a design characteristic of the Analog Devices architecture and represents an improvement for power-sensitive applications.
Q: Can I use LTC4313CDD-1#PBF if my application operates at -40°C?
A: No. LTC4313CDD-1#PBF operates only from 0°C to 70°C. For applications requiring -40°C operation, select TCA4311ADR, LTC1694-1IS5#TRMPBF, or LTC1694-1IS5#TRPBF.
Q: What PCB modifications are needed when switching from 8-SOIC to SOT-23-5 package?
A: SOT-23-5 packages require complete footprint redesign due to different pin pitch, pad size, and layout geometry. Schematic connections remain identical (2-Wire Bus input/output), but PCB routing and component placement must be updated. Consult package datasheets for precise footprint specifications.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All substitute parts listed (TCA4311ADR, LTC1694 series, LTC4313CDD-1#PBF) are ROHS3 compliant with MSL 1 (Unlimited) rating, matching the original PCA9514AD,112 compliance status.
Q: Which substitute part has the highest inventory availability?
A: LTC1694-1IS5#TRMPBF has the highest inventory at 30,484 pieces in stock, followed by LTC1694IS5#TRPBF at 7,323 pieces. TCA4311ADR has 17,861 pieces available.
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