Renesas 670M-01LF Zero Delay Buffer IC Equivalent & Substitute Parts

Part Overview

The Renesas 670M-01LF is a Zero Delay Buffer IC designed for clock distribution and timing applications. This 16-SOIC surface mount device operates at frequencies up to 160MHz with a 1:1 input-to-output ratio and supports supply voltages from 3V to 5.5V. The product is classified as obsolete, making identification of functionally compatible alternatives essential for ongoing system support and new design implementations.

Key Parameters

Parameter	670M-01LF
Manufacturer	Renesas Electronics Corporation
Category	Clock/Timing
Type	Zero Delay Buffer
Frequency - Max	160MHz
Voltage - Supply	3V ~ 5.5V
Input/Output Configuration	Clock Input / CMOS Output
Ratio - Input:Output	1:1
PLL	Yes
Package / Case	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Operating Temperature	0°C ~ 70°C
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
MSL Rating	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution of the 670M-01LF requires evaluation based on the following critical parameters:

Frequency Capability: The substitute must support the maximum operating frequency of 160MHz or higher
Supply Voltage Compatibility: The substitute must operate within or encompass the 3V to 5.5V supply range
Output Type: CMOS output compatibility is required for direct signal interface
PLL Functionality: Presence of PLL for clock generation and buffering
Package Compatibility: Surface mount package suitable for PCB integration
Compliance Standards: RoHS3 compliance and REACH unaffected status maintained

The identified substitute, Renesas 5P35023B-000NLGI, is a Clock Generator IC that exceeds the frequency and voltage specifications of the original part while maintaining manufacturer continuity and compliance requirements.

Parameter Comparison

Parameter	670M-01LF	5P35023B-000NLGI
Manufacturer	Renesas Electronics Corporation	Renesas Electronics Corporation
Category	Clock/Timing	Clock/Timing
Frequency - Max	160MHz	500MHz
Voltage - Supply	3V ~ 5.5V	1.71V ~ 1.89V, 2.375V ~ 2.625V, 3.135V ~ 3.465V
Output Type	CMOS	LP-HCSL, LVCMOS, LVDS, LVPECL
PLL	Yes	Yes with Bypass
Mounting Type	Surface Mount	Surface Mount
Package / Case	16-SOIC (0.154", 3.90mm Width)	24-VFQFN Exposed Pad (4x4)
Operating Temperature	0°C ~ 70°C	-40°C ~ 85°C
Product Status	Obsolete	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	3 (168 Hours)	1 (Unlimited)

Engineering Selection Recommendations

The 5P35023B-000NLGI serves as the manufacturer-recommended substitute for the obsolete 670M-01LF. Selection of this alternative is based on the following engineering criteria:

Product Status: The 5P35023B-000NLGI maintains active product status with ongoing manufacturer support, ensuring long-term availability and supply chain continuity
Compliance Certification: Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements
Performance Headroom: The substitute provides superior frequency capability (500MHz vs. 160MHz) and extended operating temperature range (-40°C to 85°C vs. 0°C to 70°C), enabling deployment in broader application environments
Functional Capability: The substitute includes multiple output format options (LP-HCSL, LVCMOS, LVDS, LVPECL) compared to the single CMOS output of the original part, providing enhanced flexibility for system integration

Critical Consideration: The 5P35023B-000NLGI operates at lower supply voltages (1.71V minimum vs. 3V minimum) and uses a different package footprint (24-VFQFN vs. 16-SOIC). PCB layout modifications and voltage regulator adjustments are required for implementation.

Frequently Asked Questions (FAQ)

Q: Can the 5P35023B-000NLGI directly replace the 670M-01LF on existing PCBs?

A: No. The substitute uses a different package (24-VFQFN vs. 16-SOIC) and requires PCB redesign. Pin assignments and signal routing must be re-evaluated during the substitution process.

Q: What are the voltage supply differences between these parts?

A: The 670M-01LF operates from 3V to 5.5V, while the 5P35023B-000NLGI operates from 1.71V to 1.89V, 2.375V to 2.625V, or 3.135V to 3.465V. System power supply architecture must be verified for compatibility.

Q: Does the 5P35023B-000NLGI support CMOS output?

A: Yes. The 5P35023B-000NLGI supports LVCMOS output among its multiple output format options, providing compatibility with CMOS input stages.

Q: Why is the 670M-01LF classified as obsolete?

A: The 670M-01LF is no longer in active production. The 5P35023B-000NLGI represents Renesas Electronics Corporation's current-generation solution for clock generation and distribution applications.

Q: Are there differences in moisture sensitivity between these parts?

A: Yes. The 670M-01LF has MSL rating 3 (168 hours), while the 5P35023B-000NLGI has MSL rating 1 (unlimited). The substitute offers superior moisture resistance characteristics.

Q: What is the frequency capability difference?

A: The 670M-01LF supports frequencies up to 160MHz, while the 5P35023B-000NLGI supports frequencies up to 500MHz. The substitute provides significantly higher frequency headroom for future design requirements.

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