LTC4315CMS#TRMPBF Equivalent & Substitute Parts

Part Overview

The LTC4315CMS#TRMPBF is an I2C buffer and accelerator interface component manufactured by Analog Devices Inc. This single-channel device operates at 400kHz data rates and is designed for I2C hotswap applications requiring 2-wire bus buffering and signal acceleration. The component is currently in active product status with 717 units in stock. Substitute parts are identified to provide design flexibility when the primary part is unavailable or when alternative packaging or performance characteristics better suit specific application requirements.

Key Parameters

Parameter	Value
Manufacturer Part Number	LTC4315CMS#TRMPBF
Manufacturer	Analog Devices Inc.
Category	Interface
Type	Buffer, Accelerator
Applications	I2C - Hotswap
Number of Channels	1
Data Rate (Max)	400kHz
Input/Output	2-Wire Bus
Voltage - Supply	2.9V ~ 5.5V
Current - Supply	8.1mA
Operating Temperature	0°C ~ 70°C (TA)
Package / Case	12-TSSOP (0.118", 3.00mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Active

Substitute Part Grouping Explanation

Substitution eligibility for the LTC4315CMS#TRMPBF is determined by the following core parameters: single-channel configuration, 400kHz maximum data rate, I2C hotswap application support, 2-wire bus input/output, surface mount technology, and compliance certifications (ROHS3, REACH Unaffected, EAR99). All identified substitute parts meet these fundamental requirements.

Substitute parts are grouped into two categories based on packaging compatibility:

Category 1: 8-Pin SOIC/TSSOP Packages — Parts with reduced pin counts (8-SO, 8-SOIC, 8-TSSOP) that maintain functional equivalence while offering different form factors. These include PCA9511AD,118; PCA9511ADP,118; PCA9512AD,118; PCA9513AD,118; PCA9513ADP,118; PCA9514ADP,118; TCA4311ADR; and TCA4311ADGKR.

Category 2: Supply Voltage Range Variations — All substitutes operate within 2.7V ~ 5.5V supply range, which encompasses the primary part's 2.9V ~ 5.5V specification, ensuring broader compatibility.

Category 3: Operating Temperature Range — Substitute parts from NXP and Texas Instruments extend operating temperature to -40°C ~ 85°C, compared to the primary part's 0°C ~ 70°C range, providing enhanced thermal performance for demanding environments.

Parameter Comparison

Parameter	LTC4315CMS#TRMPBF	PCA9511AD,118	PCA9511ADP,118	PCA9512AD,118	PCA9513AD,118	PCA9513ADP,118	PCA9514ADP,118	TCA4311ADR	TCA4311ADGKR
Manufacturer	Analog Devices	NXP USA Inc.	NXP Semiconductors	NXP USA Inc.	NXP USA Inc.	NXP USA Inc.	NXP USA Inc.	Texas Instruments	Texas Instruments
Type	Buffer, Accelerator	Buffer, Accelerator	Buffer, Accelerator	Buffer, Accelerator	Buffer, Accelerator	Buffer, Accelerator	Buffer, Accelerator	Buffer, Accelerator	Buffer, Accelerator
Applications	I2C - Hotswap	I2C - Hotswap	I2C - Hotswap	I2C - Hotswap	I2C - Hotswap	I2C - Hotswap	I2C - Hotswap	I2C - Hotswap	I2C - Hotswap
Number of Channels	1	1	1	1	1	1	1	1	1
Data Rate (Max)	400kHz	400kHz	400kHz	400kHz	400kHz	400kHz	400kHz	Not Specified	Not Specified
Input	2-Wire Bus	2-Wire Bus	2-Wire Bus	2-Wire Bus	2-Wire Bus	2-Wire Bus	2-Wire Bus	2-Wire Bus	2-Wire Bus
Output	2-Wire Bus	2-Wire Bus	2-Wire Bus	2-Wire Bus	2-Wire Bus	2-Wire Bus	2-Wire Bus	2-Wire Bus	2-Wire Bus
Voltage - Supply	2.9V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V
Current - Supply	8.1mA	6mA	3.5mA	1.8mA	3.5mA	3.5mA	3.5mA	5.1mA	5.1mA
Operating Temperature	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	12-TSSOP	8-SOIC	8-TSSOP	8-SOIC	8-SOIC	8-TSSOP	8-TSSOP	8-SOIC	8-TSSOP
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected
ECCN	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99
Product Status	Active	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All identified substitute parts maintain active product status with full ROHS3 compliance and REACH unaffected certification, ensuring regulatory alignment with the primary LTC4315CMS#TRMPBF component. Selection among substitutes should be based on the following engineering criteria:

For Pin-Compatible Designs: PCA9511ADP,118 and PCA9513ADP,118 offer 8-TSSOP packaging with reduced pin counts, requiring PCB layout modifications from the 12-TSSOP primary part.

For Lowest Supply Current: PCA9512AD,118 delivers 1.8mA supply current, the lowest among all substitutes, suitable for power-constrained applications.

For Extended Temperature Range: All NXP and Texas Instruments substitutes support -40°C ~ 85°C operating temperature, compared to the primary part's 0°C ~ 70°C range, enabling deployment in industrial and automotive environments.

For SOIC Package Preference: PCA9511AD,118; PCA9512AD,118; PCA9513AD,118; and TCA4311ADR provide 8-SOIC packaging for applications requiring standard DIP-compatible footprints.

For TSSOP Package Preference: PCA9511ADP,118; PCA9513ADP,118; PCA9514ADP,118; and TCA4311ADGKR provide 8-TSSOP packaging with 0.118" width matching the primary part's package width.

All substitutes are qualified for I2C hotswap applications with 2-wire bus interface compatibility and maintain the single-channel, 400kHz data rate specification of the primary component.

Frequently Asked Questions (FAQ)

Q: Can PCA9511AD,118 directly replace LTC4315CMS#TRMPBF on the same PCB?

A: No. PCA9511AD,118 uses 8-SOIC packaging versus the primary part's 12-TSSOP packaging. PCB layout redesign is required. However, functional equivalence is maintained for I2C hotswap applications.

Q: What is the primary difference between PCA9512AD,118 and PCA9513AD,118?

A: Both parts are functionally equivalent for I2C hotswap buffering. PCA9512AD,118 features 10 pF input capacitance and 1.8mA supply current. PCA9513AD,118 features 1.9 pF input capacitance and 3.5mA supply current. Selection depends on input impedance and power budget requirements.

Q: Are all substitute parts suitable for automotive applications?

A: All substitute parts support -40°C ~ 85°C operating temperature range, which aligns with automotive temperature specifications. All maintain ROHS3 compliance and REACH unaffected status. Specific automotive qualification requirements should be verified against application standards.

Q: What is the advantage of PCA9511ADP,118 over PCA9511AD,118?

A: Both parts are functionally equivalent NXP PCA9511 variants. PCA9511ADP,118 uses 8-TSSOP packaging (0.118" width), while PCA9511AD,118 uses 8-SOIC packaging (0.154" width). Package selection depends on PCB space constraints and manufacturing capabilities.

Q: Can TCA4311ADR and TCA4311ADGKR be used interchangeably?

A: Both are Texas Instruments TCA4311 variants with identical electrical specifications. TCA4311ADR uses 8-SOIC packaging, while TCA4311ADGKR uses 8-TSSOP packaging. Selection depends on PCB layout requirements and available footprint space.

Q: Does the LTC4315CMS#TRMPBF require PCB layout changes when substituted with 8-pin alternatives?

A: Yes. The primary part uses 12-TSSOP packaging with 12 pins, while all identified substitutes use 8-pin packages (8-SOIC or 8-TSSOP). PCB footprint redesign is mandatory. Functional signal routing remains equivalent for I2C bus buffering.

Q: What supply voltage range is compatible with all substitute parts?

A: All substitute parts operate within 2.7V ~ 5.5V supply range, which encompasses the primary part's 2.9V ~ 5.5V specification. Designs operating at 2.7V ~ 2.9V can use substitutes but not the primary LTC4315CMS#TRMPBF.

Q: Are there inventory advantages to selecting specific substitute parts?

A: PCA9513AD,118 has the highest inventory availability at 9,229 units. TCA4311ADGKR has 20,202 units in stock. These parts offer supply chain advantages for high-volume production requirements.

Q: Do all substitute parts support the same 400kHz I2C data rate?

A: NXP parts (PCA9511, PCA9512, PCA9513, PCA9514 series) explicitly specify 400kHz maximum data rate. Texas Instruments TCA4311 variants do not specify data rate in the provided parameters but are functionally equivalent for I2C hotswap applications.

Q: What is the delay time specification for substitute parts?

A: PCA9511ADP,118 specifies 70ns delay time. Most other substitutes do not provide delay time specifications in the available data. The primary part specifies 130ns delay time. Delay time performance should be verified against application timing requirements.

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