Renesas 511MLFT Clock Generator - Equivalent & Substitute Parts

Part Overview

The Renesas 511MLFT is a Clock Generator IC operating at 200MHz with 1:1 input-to-output ratio, housed in an 8-SOIC package. This component is classified as Obsolete, making identification of functionally compatible alternatives essential for ongoing system support and new design implementations. The 511MLFT provides CMOS output with PLL capability and operates across a 3.135V to 5.25V supply range, serving applications requiring stable clock generation in compact surface-mount form factors.

Key Parameters

Parameter	511MLFT
Manufacturer	Renesas Electronics Corporation
Category	Clock/Timing
Type	Clock Generator
Frequency - Max	200MHz
PLL	Yes
Input Type	Clock, Crystal
Output Type	CMOS
Ratio - Input:Output	1:1
Voltage - Supply	3.135V ~ 5.25V
Operating Temperature	0°C ~ 70°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the 511MLFT requires evaluation against the following critical parameters:

Functional Compatibility Criteria:

Maximum frequency capability of 200MHz or greater
PLL functionality present
Input support for Clock or Crystal sources
Output capability in CMOS or compatible logic families

Electrical Compatibility Criteria:

Supply voltage range overlap with 3.135V ~ 5.25V
Operating temperature range that meets or exceeds 0°C ~ 70°C

Physical & Compliance Criteria:

Surface-mount packaging
ROHS3 compliance
Active or current product status preferred for long-term availability

The Renesas 9FGV1006C001LTGI8 qualifies as a substitute based on these parameters. While it operates at higher maximum frequencies (200MHz, 325MHz) and offers expanded input/output options, it maintains core functional equivalence through PLL support, multi-voltage operation, and active product status. The 16-TFLGA package represents a different form factor requiring PCB layout modification.

Parameter Comparison

Parameter	511MLFT	9FGV1006C001LTGI8	Compatibility Notes
Manufacturer	Renesas Electronics Corporation	Renesas Electronics Corporation	Same manufacturer
Category	Clock/Timing	Clock/Timing	Identical category
Type	Clock Generator	Clock Generator	Identical type
Frequency - Max	200MHz	200MHz, 325MHz	Substitute supports 200MHz minimum requirement
PLL	Yes	Yes	Both include PLL
Input Type	Clock, Crystal	HCSL, LVCMOS, LVDS, Crystal	Substitute supports all 511MLFT inputs plus additional options
Output Type	CMOS	CML, HCSL, LP-HCSL, LVCMOS, LVDS, LVPECL	Substitute supports LVCMOS (CMOS-compatible) plus additional options
Voltage - Supply	3.135V ~ 5.25V	1.71V ~ 1.89V, 2.375V ~ 2.625V, 3.135V ~ 3.465V	Partial overlap at 3.135V ~ 3.465V range
Operating Temperature	0°C ~ 70°C	-40°C ~ 85°C (TA)	Substitute exceeds 511MLFT temperature range
Package / Case	8-SOIC (0.154", 3.90mm Width)	16-TFLGA Exposed Pad (3x3)	Different package; PCB redesign required
Mounting Type	Surface Mount	Surface Mount	Both surface mount
Product Status	Obsolete	Active	Substitute is active; preferred for new designs
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Both compliant
MSL Rating	1 (Unlimited)	3 (168 Hours)	Substitute has higher moisture sensitivity

Engineering Selection Recommendations

For Direct Replacement (Same PCB Layout): No direct pin-compatible substitute is provided in this reference. The 511MLFT's 8-SOIC package is specific to its design. Continued use of existing 511MLFT inventory is viable given ROHS3 compliance and MSL-1 rating, which supports extended storage and handling without moisture bake-out procedures.

For New Designs or PCB Redesign Scenarios: The Renesas 9FGV1006C001LTGI8 is suitable when PCB layout modification is acceptable. This substitute offers:

Active product status ensuring long-term availability
Extended operating temperature range (-40°C to 85°C)
Expanded input/output interface options
ROHS3 compliance matching the original part
Functional clock generation capability at 200MHz and beyond

Critical Design Consideration: The 9FGV1006C001LTGI8 operates at reduced maximum supply voltage (3.465V upper limit) compared to the 511MLFT (5.25V upper limit). Systems requiring 5V operation must verify compatibility with the substitute's 3.135V ~ 3.465V range or select alternative voltage rails.

Frequently Asked Questions (FAQ)

Q: Can the 9FGV1006C001LTGI8 directly replace the 511MLFT on existing PCBs?

A: No. The 511MLFT uses an 8-SOIC package while the 9FGV1006C001LTGI8 uses a 16-TFLGA package. Pin counts, spacing, and footprints differ significantly. PCB redesign is required for substitution.

Q: What is the primary reason the 511MLFT is obsolete?

A: The 511MLFT is classified as Obsolete by Renesas. Newer clock generator architectures, such as the PhiClock™ series (9FGV1006), offer enhanced functionality, wider operating ranges, and improved integration options. Existing inventory remains available for legacy system support.

Q: Are there supply voltage compatibility issues between the 511MLFT and 9FGV1006C001LTGI8?

A: Yes. The 511MLFT operates at 3.135V ~ 5.25V, while the 9FGV1006C001LTGI8 operates at 1.71V ~ 1.89V, 2.375V ~ 2.625V, or 3.135V ~ 3.465V depending on configuration. The overlap is limited to 3.135V ~ 3.465V. Systems designed for 5V operation cannot use the substitute without voltage regulation modifications.

Q: Does the 9FGV1006C001LTGI8 support the same input and output types as the 511MLFT?

A: The 9FGV1006C001LTGI8 supports all input types of the 511MLFT (Clock, Crystal) plus additional options (HCSL, LVCMOS, LVDS). For output, it supports LVCMOS (CMOS-compatible) plus CML, HCSL, LP-HCSL, LVDS, and LVPECL. Configuration is required to match the 511MLFT's CMOS output specification.

Q: What is the impact of the higher MSL rating on the 9FGV1006C001LTGI8?

A: The 9FGV1006C001LTGI8 has MSL-3 (168 Hours), compared to the 511MLFT's MSL-1 (Unlimited). MSL-3 components require moisture bake-out procedures if exposed to humidity for extended periods before soldering. This affects storage, handling, and production logistics but does not impact functional performance after assembly.

Q: Is the 9FGV1006C001LTGI8 suitable for legacy system repairs?

A: The 9FGV1006C001LTGI8 is suitable only if PCB modification is feasible. For true drop-in replacement on existing 511MLFT boards, continued use of original 511MLFT inventory is the only option. Consult the 511MLFT datasheet and the 9FGV1006C001LTGI8 datasheet to confirm functional equivalence for your specific application before implementation.

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