ICS291PG Clock/Frequency Synthesizer IC Equivalent & Substitute Parts

Part Overview

The ICS291PG is a Clock/Frequency Synthesizer IC manufactured by Renesas Electronics Corporation, designed for 200MHz operation in a 20-TSSOP surface mount package. This component integrates a Phase-Locked Loop (PLL) with bypass capability, supporting both clock and crystal inputs with CMOS output configuration. The ICS291PG is classified as obsolete, making identification of active equivalent parts essential for new designs and ongoing production support.

Substiute Parts

ICS291PG

Renesas Electronics CorporationIn Stock: 979ICS291PG Datasheet

Current PartRFQ

291PGLF

Renesas Electronics CorporationIn Stock: 996291PGLF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ICS291PG is determined by strict equivalence across the following critical parameters:

• Frequency Performance: Maximum operating frequency of 200MHz
• PLL Architecture: Phase-Locked Loop with bypass capability
• Input/Output Configuration: Clock and crystal input support with CMOS output
• Input:Output Ratio: 1:6 multiplier/divider ratio
• Supply Voltage Range: 3.135V ~ 3.465V
• Package Specification: 20-TSSOP (0.173", 4.40mm Width) surface mount
• Number of Circuits: Single circuit configuration
• Operating Temperature Range: 0°C ~ 70°C

The 291PGLF variant meets all electrical and mechanical specifications of the ICS291PG while offering improved product status and regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

The 291PGLF is the direct functional equivalent of the ICS291PG with identical electrical and mechanical specifications. Selection of the 291PGLF is supported by the following factors:

• Product Status: The 291PGLF maintains active product status, ensuring continued availability and manufacturing support, whereas the ICS291PG is obsolete.
• Regulatory Compliance: The 291PGLF is ROHS3 compliant, meeting current environmental and hazardous substance restrictions. The ICS291PG is non-compliant with RoHS requirements.
• Functional Equivalence: All critical parameters including frequency, PLL configuration, input/output characteristics, supply voltage, operating temperature, and package specification are identical.
• Inventory Availability: Both parts are available in stock, with the 291PGLF offering 913 units and the ICS291PG offering 920 units.

Frequently Asked Questions (FAQ)

Q: Can the 291PGLF directly replace the ICS291PG in existing designs?

A: Yes. The 291PGLF is electrically and mechanically equivalent to the ICS291PG. All functional parameters, supply voltage requirements, operating temperature range, and package specifications are identical. Pin configuration and signal characteristics remain unchanged.

Q: What is the primary advantage of using the 291PGLF over the ICS291PG?

A: The 291PGLF is an active product with ROHS3 compliance, whereas the ICS291PG is obsolete and RoHS non-compliant. For new designs and long-term production, the 291PGLF provides regulatory compliance and assured supply chain continuity.

Q: Are there any package or mounting differences between these parts?

A: No. Both the ICS291PG and 291PGLF use the identical 20-TSSOP (0.173", 4.40mm Width) surface mount package. PCB layout and assembly processes require no modification.

Q: What is the input:output ratio for these clock synthesizers?

A: Both parts operate with a 1:6 input:output ratio, supporting frequency multiplication and division through integrated divider/multiplier circuitry.

Q: Are these parts suitable for crystal or clock input applications?

A: Yes. Both the ICS291PG and 291PGLF accept either clock or crystal inputs, with PLL bypass capability for flexible clock distribution configurations.