PCA9511DP,118 Equivalent & Substitute Parts

Part Overview

The PCA9511DP,118 is an I2C hot-swappable buffer and accelerator manufactured by NXP USA Inc., designed for 2-wire bus interface applications with a maximum data rate of 400kHz. This part operates across a supply voltage range of 2.7V to 5.5V and is housed in an 8-TSSOP package. The product status is obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements.

Key Parameters

Parameter	Value
Manufacturer	NXP USA Inc.
Part Number	PCA9511DP,118
Product Status	Obsolete
Type	Buffer, Accelerator
Application	I2C - Hotswap
Data Rate (Max)	400kHz
Number of Channels	1
Voltage - Supply	2.7V ~ 5.5V
Current - Supply	6mA
Operating Temperature	-40°C ~ 85°C
Package / Case	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the PCA9511DP,118 is determined by the following critical parameters: I2C hot-swap buffer/accelerator functionality, 400kHz data rate capability, 1-channel configuration, 2.7V to 5.5V supply voltage compatibility, -40°C to 85°C operating temperature range, and surface-mount package compatibility (8-TSSOP or 8-MSOP form factors).

Substitute parts are grouped into two categories:

Direct Manufacturer Substitutes (NXP): Parts that maintain identical electrical specifications and package form factors, including PCA9511ADP,118 (active status) and PCA9512ADP,118 (active status, parametric equivalent).

Cross-Manufacturer Alternatives: Parts from Analog Devices Inc. (LTC4313 series) and Texas Instruments (TCA4311ADGKR) that meet the core functional requirements of I2C hot-swap buffering with compatible supply voltage, operating temperature, and package dimensions.

Limited-Scope Alternative: The LTC1694-1CS5#TRMPBF operates at reduced data rate (100kHz) and narrower temperature range (0°C to 70°C), suitable only for applications with relaxed performance requirements.

Parameter Comparison

Part Number	Manufacturer	Product Status	Data Rate (Max)	Voltage - Supply	Current - Supply	Operating Temperature	Package	RoHS Status
PCA9511DP,118	NXP USA Inc.	Obsolete	400kHz	2.7V ~ 5.5V	6mA	-40°C ~ 85°C	8-TSSOP	ROHS3 Compliant
PCA9511ADP,118	NXP Semiconductors	Active	400kHz	2.7V ~ 5.5V	4.6mA	-40°C ~ 85°C	8-TSSOP	ROHS3 Compliant
PCA9512ADP,118	NXP USA Inc.	Active	400kHz	2.7V ~ 5.5V	1.8mA	-40°C ~ 85°C	8-TSSOP	ROHS3 Compliant
LTC4313IMS8-1#PBF	Analog Devices Inc.	Active	400kHz	2.9V ~ 5.5V	8.1mA	-40°C ~ 85°C	8-MSOP	ROHS3 Compliant
LTC4313IMS8-1#TRPBF	Analog Devices Inc.	Active	400kHz	2.9V ~ 5.5V	8.1mA	-40°C ~ 85°C	8-MSOP	ROHS3 Compliant
LTC4313IMS8-2#PBF	Analog Devices Inc.	Active	400kHz	2.9V ~ 5.5V	8.1mA	-40°C ~ 85°C	8-MSOP	ROHS3 Compliant
LTC4313IMS8-2#TRPBF	Analog Devices Inc.	Active	400kHz	2.9V ~ 5.5V	8.1mA	-40°C ~ 85°C	8-MSOP	ROHS3 Compliant
LTC4313IMS8-3#PBF	Analog Devices Inc.	Active	400kHz	2.9V ~ 5.5V	8.1mA	-40°C ~ 85°C	8-MSOP	ROHS3 Compliant
LTC4313IMS8-3#TRPBF	Analog Devices Inc.	Active	400kHz	2.9V ~ 5.5V	8.1mA	-40°C ~ 85°C	8-MSOP	ROHS3 Compliant
TCA4311ADGKR	Texas Instruments	Active	Not specified	2.7V ~ 5.5V	5.1mA	-40°C ~ 85°C	8-VSSOP	ROHS3 Compliant
LTC1694-1CS5#TRMPBF	Analog Devices Inc.	Active	100kHz	2.7V ~ 6V	60µA	0°C ~ 70°C	TSOT-23-5	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Recommended for Direct Replacement):

PCA9511ADP,118 and PCA9512ADP,118 are the preferred alternatives, both manufactured by NXP with active product status. These parts maintain full electrical compatibility with the obsolete PCA9511DP,118, including 400kHz data rate, identical supply voltage range (2.7V to 5.5V), and matching operating temperature specifications (-40°C to 85°C). Both are ROHS3 compliant and available in 8-TSSOP packaging. PCA9512ADP,118 offers reduced supply current (1.8mA) compared to the original specification (6mA).

Secondary Substitutes (Cross-Manufacturer Options):

The LTC4313 series from Analog Devices Inc. (variants LTC4313IMS8-1#PBF, LTC4313IMS8-1#TRPBF, LTC4313IMS8-2#PBF, LTC4313IMS8-2#TRPBF, LTC4313IMS8-3#PBF, LTC4313IMS8-3#TRPBF) provides functional equivalence with 400kHz data rate capability and matching operating temperature range. These parts are available in 8-MSOP packaging and maintain ROHS3 compliance. Supply voltage range is 2.9V to 5.5V, which is compatible with the original specification. Supply current is 8.1mA, higher than the original 6mA specification.

TCA4311ADGKR from Texas Instruments is functionally compatible for I2C hot-swap applications with matching supply voltage (2.7V to 5.5V) and operating temperature (-40°C to 85°C). This part is packaged in 8-VSSOP and is ROHS3 compliant. Data rate specification is not provided in the available parameters.

Limited-Scope Alternative:

LTC1694-1CS5#TRMPBF is suitable only for applications with reduced performance requirements. This part operates at 100kHz maximum data rate and supports a narrower operating temperature range (0°C to 70°C) compared to the original specification (-40°C to 85°C). It is packaged in TSOT-23-5 form factor and is ROHS3 compliant.

Frequently Asked Questions (FAQ)

Q: Can PCA9511ADP,118 directly replace PCA9511DP,118?

A: Yes. Both parts are manufactured by NXP, operate at 400kHz, support 2.7V to 5.5V supply voltage, and function across -40°C to 85°C. PCA9511ADP,118 has active product status and is available in 8-TSSOP packaging. The primary difference is reduced supply current (4.6mA versus 6mA).

Q: What is the difference between PCA9511ADP,118 and PCA9512ADP,118?

A: Both are NXP I2C hot-swap buffers with 400kHz data rate and identical supply voltage and operating temperature specifications. PCA9512ADP,118 has lower supply current (1.8mA) and is designated as a parametric equivalent. Both are available in 8-TSSOP packaging with active product status.

Q: Can LTC4313 series parts replace the PCA9511DP,118?

A: The LTC4313 series provides functional equivalence for I2C hot-swap applications with 400kHz data rate and matching operating temperature range (-40°C to 85°C). The primary differences are packaging (8-MSOP versus 8-TSSOP) and minimum supply voltage (2.9V versus 2.7V). Supply current is higher at 8.1mA.

Q: Is TCA4311ADGKR compatible with the original application?

A: TCA4311ADGKR is functionally compatible for I2C hot-swap buffering with matching supply voltage (2.7V to 5.5V) and operating temperature (-40°C to 85°C). The part is packaged in 8-VSSOP. Data rate specification is not provided in available parameters. Verify data rate requirements against application specifications.

Q: When should LTC1694-1CS5#TRMPBF be considered?

A: LTC1694-1CS5#TRMPBF is suitable only for applications with reduced performance requirements. This part operates at 100kHz maximum data rate and supports operating temperature range of 0°C to 70°C. It is packaged in TSOT-23-5 form factor. Use only when application specifications permit reduced data rate and narrower temperature range.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant and REACH unaffected, matching the compliance status of the original PCA9511DP,118.

Q: What packaging options are available for substitutes?

A: NXP alternatives (PCA9511ADP,118 and PCA9512ADP,118) are available in 8-TSSOP. Analog Devices LTC4313 series is available in 8-MSOP. Texas Instruments TCA4311ADGKR is available in 8-VSSOP. Analog Devices LTC1694-1CS5#TRMPBF is available in TSOT-23-5. Verify PCB layout compatibility with selected package form factor.

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