PCA9512DP,118 Equivalent & Substitute Parts

Part Overview

The PCA9512DP,118 is an I2C buffer accelerator manufactured by NXP Semiconductors, designed for 2-wire bus interface applications with hotswap capability. This single-channel device operates at 400kHz data rate in an 8-TSSOP surface mount package. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs requiring similar functionality.

Key Parameters

Parameter	Value
Manufacturer Part Number	PCA9512DP,118
Manufacturer	NXP Semiconductors
Product Category	Interface - Buffer, Accelerator
Applications	I2C - Hotswap
Data Rate (Max)	400kHz
Number of Channels	1
Input/Output	2-Wire Bus
Voltage Supply Range	2.7V ~ 5.5V
Supply Current	1.8mA
Operating Temperature	-40°C ~ 85°C
Package Type	8-TSSOP (0.118", 3.00mm Width)
Mounting Type	Surface Mount
Input Capacitance	10 pF
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the PCA9512DP,118 is determined by the following critical parameters:

Primary Substitution Criteria:

I2C buffer accelerator functionality for 2-wire bus interface
400kHz data rate capability
Single-channel configuration
Voltage supply range compatibility (2.7V minimum, 5.5V maximum)
Surface mount package with equivalent thermal and electrical characteristics
Hotswap application support
Operating temperature range coverage (-40°C to 85°C preferred)

Substitution Categories:

Category 1: Direct Parametric Equivalent PCA9512ADP,118 (NXP USA Inc.) matches all electrical parameters and package specifications. Active product status provides long-term availability.

Category 2: Functional Equivalents with Package Variation LTC1694 series devices (Analog Devices Inc.) provide I2C buffer acceleration in SOT-23-5 package. These parts support 400kHz data rate operation with compatible voltage supply ranges (2.7V ~ 6V). Package change from 8-TSSOP to SOT-23-5 requires PCB layout modification.

Category 3: Hotswap-Specific Equivalents LTC4313 series devices (Analog Devices Inc.) in 8-DFN package provide I2C hotswap buffer acceleration at 400kHz with enhanced current supply capability (8.1mA). Voltage supply range 2.9V ~ 5.5V overlaps with original specification.

Parameter Comparison

Part Number	Manufacturer	Data Rate (Max)	Channels	Voltage Supply	Supply Current	Operating Temp	Package	Status
PCA9512DP,118	NXP Semiconductors	400kHz	1	2.7V ~ 5.5V	1.8mA	-40°C ~ 85°C	8-TSSOP	Obsolete
PCA9512ADP,118	NXP USA Inc.	400kHz	1	2.7V ~ 5.5V	1.8mA	-40°C ~ 85°C	8-TSSOP	Active
LTC1694-1IS5#TRMPBF	Analog Devices Inc.	400kHz	1	2.7V ~ 6V	60µA	-40°C ~ 85°C	SOT-23-5	Active
LTC1694-1IS5#TRPBF	Analog Devices Inc.	400kHz	1	2.7V ~ 6V	60µA	-40°C ~ 85°C	SOT-23-5	Active
LTC1694IS5#TRMPBF	Analog Devices Inc.	400kHz	1	2.7V ~ 6V	60µA	-40°C ~ 85°C	SOT-23-5	Active
LTC1694IS5#TRPBF	Analog Devices Inc.	400kHz	1	2.7V ~ 6V	60µA	-40°C ~ 85°C	SOT-23-5	Active
LTC1694CS5#TRPBF	Analog Devices Inc.	400kHz	1	2.7V ~ 6V	60µA	0°C ~ 70°C	SOT-23-5	Active
LTC4313CDD-1#PBF	Analog Devices Inc.	400kHz	1	2.9V ~ 5.5V	8.1mA	0°C ~ 70°C	8-DFN (3x3)	Active

Engineering Selection Recommendations

For Direct Replacement (No PCB Modification): Select PCA9512ADP,118 when package footprint and form factor must remain unchanged. This part maintains identical electrical specifications and 8-TSSOP package configuration. Active product status ensures availability and long-term support.

For New Designs with Package Flexibility: LTC1694 series devices offer superior power efficiency (60µA vs. 1.8mA supply current) and extended voltage supply range (2.7V ~ 6V). These parts require SOT-23-5 package accommodation on PCB. Multiple temperature grade options (0°C ~ 70°C and -40°C ~ 85°C) support diverse application requirements. All variants maintain ROHS3 compliance and MSL 1 rating.

For Hotswap-Critical Applications: LTC4313CDD-1#PBF provides dedicated hotswap buffer acceleration in 8-DFN package with higher supply current capability (8.1mA). Voltage supply range 2.9V ~ 5.5V overlaps original specification. Package change from 8-TSSOP to 8-DFN (3x3) requires PCB layout modification.

Compliance Considerations: All recommended substitutes maintain ROHS3 compliance, REACH unaffected status, and MSL 1 moisture sensitivity rating, ensuring regulatory and environmental compatibility with original design requirements.

Frequently Asked Questions (FAQ)

Q: Can PCA9512ADP,118 be used as a direct drop-in replacement for PCA9512DP,118?

A: Yes. PCA9512ADP,118 matches all electrical parameters, package specifications, and operating characteristics. The primary difference is product status: PCA9512ADP,118 is active while PCA9512DP,118 is obsolete. No PCB modifications are required.

Q: What are the key differences between NXP PCA9512 and Analog Devices LTC1694 series?

A: Both provide I2C buffer acceleration at 400kHz with single-channel configuration. Primary differences: (1) Package—PCA9512 uses 8-TSSOP while LTC1694 uses SOT-23-5; (2) Supply current—LTC1694 operates at 60µA versus PCA9512's 1.8mA; (3) Voltage range—LTC1694 extends to 6V maximum. LTC1694 requires PCB layout changes but offers lower power consumption.

Q: Which substitute part supports the full -40°C to 85°C operating temperature range?

A: PCA9512ADP,118, LTC1694-1IS5#TRMPBF, LTC1694-1IS5#TRPBF, LTC1694IS5#TRMPBF, and LTC1694IS5#TRPBF all support -40°C to 85°C operation. LTC1694CS5#TRPBF and LTC4313CDD-1#PBF are limited to 0°C to 70°C.

Q: Is package change from 8-TSSOP to SOT-23-5 acceptable for this application?

A: Package change is acceptable if PCB layout can accommodate SOT-23-5 footprint. Both packages are surface mount with equivalent electrical performance at 400kHz I2C operation. Verify PCB routing and thermal requirements before implementation.

Q: What is the advantage of LTC4313CDD-1#PBF for hotswap applications?

A: LTC4313CDD-1#PBF is specifically designed for I2C hotswap functionality with 8.1mA supply current capability, higher than standard buffer accelerators. The 8-DFN package provides compact form factor. Voltage supply range 2.9V ~ 5.5V overlaps original specification for hotswap-critical designs.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All recommended substitutes maintain ROHS3 compliance and MSL 1 moisture sensitivity rating, ensuring regulatory compatibility with original PCA9512DP,118 design requirements.

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