LTC6957HMS-3 Equivalent & Substitute Parts

Part Overview

The LTC6957HMS-3 is a Clock Buffer/Driver IC manufactured by Analog Devices Inc., designed for 1:2 clock distribution applications with a maximum frequency of 300 MHz. This device accepts multiple input signal types (CML, CMOS, LVDS, LVPECL) and provides CMOS output, making it suitable for general-purpose clock fanout and distribution in timing-critical applications.

The LTC6957HMS-3 carries an Obsolete product status. Locating equivalent substitute parts is necessary to ensure continued availability for new designs, production continuity, and long-term system support. The substitute part identified maintains identical electrical and mechanical specifications while offering improved availability and compliance status.

Substiute Parts

LTC6957HMS-3

Analog Devices Inc.In Stock: 917LTC6957HMS-3 Datasheet

Current PartRFQ

LTC6957HMS-3#PBF

Analog Devices Inc.In Stock: 2786LTC6957HMS-3#PBF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LTC6957HMS-3 is determined by strict equivalence across the following critical parameters:

Electrical Specifications:

• Input/Output ratio (1:2)
• Input signal compatibility (CML, CMOS, LVDS, LVPECL)
• Output signal type (CMOS)
• Maximum operating frequency (300 MHz)
• Supply voltage range (3.15V ~ 3.45V)
• Operating temperature range (-40°C ~ 125°C)

Mechanical Specifications:

• Package type (12-TSSOP)
• Physical dimensions (0.118", 3.00mm Width)
• Mounting type (Surface Mount)
• Moisture Sensitivity Level (MSL 1)

Regulatory & Compliance:

• ECCN classification (EAR99)
• HTSUS code (8542.39.0001)

The substitute part LTC6957HMS-3#PBF maintains complete electrical and mechanical compatibility with the original part while offering improved product status and regulatory compliance documentation.

Parameter Comparison

Engineering Selection Recommendations

LTC6957HMS-3#PBF is the direct substitute for the obsolete LTC6957HMS-3. This part is functionally and mechanically identical across all critical electrical parameters and package specifications.

Advantages of LTC6957HMS-3#PBF:

The substitute part carries Last Time Buy status, indicating controlled availability with defined procurement windows. The part includes explicit RoHS3 compliance certification and REACH unaffected status, providing regulatory documentation suitable for applications requiring environmental compliance verification. These certifications are not specified for the original LTC6957HMS-3.

Compatibility Assurance:

Both parts share identical electrical performance specifications, input/output signal compatibility, frequency ratings, supply voltage requirements, and operating temperature ranges. The 12-TSSOP package dimensions and surface mount configuration are identical, ensuring direct PCB layout compatibility without design modifications.

Procurement Considerations:

The LTC6957HMS-3#PBF is available in Tube packaging with significantly higher inventory levels (2700 Pcs) compared to the original part (835 Pcs). The Last Time Buy status requires attention to procurement timelines for long-term production requirements.

Frequently Asked Questions (FAQ)

Q: Can LTC6957HMS-3#PBF be used as a direct replacement for LTC6957HMS-3 in existing designs?

A: Yes. The LTC6957HMS-3#PBF is electrically and mechanically identical to the LTC6957HMS-3 across all specified parameters. No design modifications are required for PCB layout, schematic, or signal integrity considerations. The part operates within identical voltage, frequency, temperature, and signal type specifications.

Q: What is the difference between the two part numbers?

A: The primary difference is product status and regulatory documentation. The LTC6957HMS-3 is Obsolete, while LTC6957HMS-3#PBF carries Last Time Buy status with explicit RoHS3 compliance and REACH unaffected certifications. The "#PBF" suffix indicates lead-free (Pb-Free) manufacturing compliance. Electrically and mechanically, both parts are equivalent.

Q: Are there any package or pinout differences?

A: No. Both parts use the identical 12-TSSOP package with 0.118" width and 3.00mm body dimensions. Pinout, lead spacing, and mounting requirements are identical. Direct PCB substitution is possible without layout modifications.

Q: What input and output signal types does this part support?

A: The LTC6957HMS-3 and LTC6957HMS-3#PBF accept CML, CMOS, LVDS, and LVPECL input signals and provide CMOS output. This multi-input compatibility allows integration with various clock source types in timing distribution networks.

Q: What is the maximum operating frequency?

A: Both parts operate at a maximum frequency of 300 MHz, suitable for clock distribution in high-speed digital systems and timing-critical applications.

Q: What supply voltage is required?

A: Both parts require a supply voltage in the range of 3.15V to 3.45V. This narrow voltage specification requires precision power supply design and regulation.

Q: What is the operating temperature range?

A: Both parts operate across -40°C to 125°C, covering industrial and extended commercial temperature ranges.

Q: Is this part RoHS compliant?

A: The LTC6957HMS-3#PBF is explicitly RoHS3 compliant. RoHS compliance status is not specified for the original LTC6957HMS-3. For applications requiring RoHS certification, the LTC6957HMS-3#PBF is the appropriate selection.

Q: What is the Moisture Sensitivity Level (MSL)?

A: Both parts carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. Standard handling and storage procedures apply without special desiccant or humidity control requirements.