ICS502MI - 140MHz LOCO PLL Clock Generator | Renesas Electronics
MPN: ICS502MI ✗ End of LifeICS502MI Overview
A LOCO PLL clock generator is a clock-and-timing integrated circuit that multiplies a low-frequency reference into a higher-frequency output. The reference can be a crystal or an external clock, and the internal PLL helps produce a higher-frequency clock for digital logic, communications, control electronics, and embedded systems. In system terms, it belongs to the clock generator and phase-locked-loop hierarchy, which sits within clock-and-timing integrated circuits and semiconductor timing-control devices. Its CMOS output is intended to drive downstream digital circuitry requiring a stable reference frequency.
The ICS502MI’s main engineering characteristics include a 140 MHz maximum frequency, a 2:2 input-to-output ratio, one clock circuit, CMOS output, and PLL operation. Its 3 V to 5.5 V supply range allows use in both 3.3 V and 5 V system rails, although the clock-generation architecture and output behavior should be checked against the complete manufacturer datasheet for each board design. The -40°C to +85°C operating range covers industrial-temperature requirements commonly encountered in industrial controls, embedded equipment, communications hardware, and test systems. The 8-SOIC package supports standard surface-mount assembly and provides a practical footprint for designs that do not require a tiny BGA or QFN package.
The device is identified as obsolete by the available product listing, so current supply and lifecycle planning require careful review before committing to a new production design. Engineers evaluating a replacement should compare the reference-input method, PLL configuration, output frequency range, supply voltage, pinout, package, timing characteristics, and operating-temperature requirements. A functionally similar clock generator is not automatically a drop-in replacement because reference pins, feedback configuration, output enable behavior, and output edge characteristics must match the original PCB footprint.
Typical uses include generating a system reference for digital logic, providing a multiplied clock for communications equipment, and supplying a CMOS clock in embedded industrial systems. The reference source and external component values must be selected using the manufacturer’s recommended application circuit and electrical characteristics. Because this is a timing device, board layout should keep the crystal or reference input connections short, maintain a clean supply path, and provide suitable bypassing close to the device.
For implementation, verify the exact pin assignment, recommended crystal load capacitance, output-drive configuration, and power-supply sequencing requirements in the manufacturer datasheet. Place decoupling capacitance close to the supply pins and route high-speed clock outputs over controlled-impedance traces when they feed sensitive digital or communications circuitry. This page summarizes the available ICS502MI specifications, lifecycle information, package data, sourcing path, and replacement-evaluation considerations.
Drop-in alternatives for ICS502MI — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
No drop-in alternatives available for this product.
Request AlternativesICS502MI Specifications
| Product Type | LOCO PLL clock multiplier and clock generator |
| PLL | Yes |
| Maximum Frequency | 140 MHz |
| Number of Circuits | 1 |
| Input Type | Clock, crystal |
| Output Type | CMOS |
| Input-to-Output Ratio | 2:2 |
| Differential Input | No |
| Differential Output | No |
| Supply Voltage Range | 3 V to 5.5 V |
| Operating Temperature Range | -40°C to +85°C |
| Package | 8-SOIC, 0.154 inch width |
| Mounting Type | SMD (SMT) |
| Tube or Rail Packaging | Tube/Rail |
| Lifecycle Status | Obsolete (EOL) |
ICS502MI 8-soic, 0.154 inch width Pin Configuration Guide
Pin configuration for ICS502MI (8-soic, 0.154 inch width package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for ICS502MI.
Refer to the datasheet for full pin configuration.
Typical Applications
ICS502MI is suitable for 6 applications: Embedded System Reference Clock, Industrial Control Clocking, Communications Equipment Timing, Digital Logic Frequency Multiplication, Legacy Test and Measurement Equipment, Mixed-Voltage Digital Systems.
Embedded System Reference Clock
The ICS502MI can provide a PLL-based CMOS clock reference for an embedded system that needs a higher-frequency clock than its available source. Its listed maximum frequency is 140 MHz, and the device accepts either a clock or crystal input, giving the board designer a selectable reference architecture. The clock output can feed digital logic or other timing blocks when the reference frequency, feedback arrangement, and load conditions are validated in the manufacturer application circuit. Because the device is obsolete (EOL), use it primarily in legacy designs or qualification-controlled replacements.
Industrial Control Clocking
ICS502MI is applicable to industrial control equipment requiring a stable digital clock across a -40°C to +85°C operating range. Its 3 V to 5.5 V supply specification supports 3.3 V and 5 V control architectures, while the one-circuit PLL function provides a compact way to derive a high-frequency clock from a lower-frequency reference. The design must follow the recommended crystal or external-clock configuration and account for clock jitter, output loading, and power-supply noise. Lifecycle review is required before introducing this obsolete (EOL) part into new industrial production.
Communications Equipment Timing
The ICS502MI can serve as a timing source in communications equipment that needs a CMOS clock derived from a crystal or external clock. Its PLL-based architecture and 140 MHz maximum listed frequency suit systems requiring a multiplied reference clock, while the 2:2 input-to-output ratio helps define the expected multiplier relationship in supported configurations. The actual reference range, output-drive strength, and jitter must be checked against the exact ICS502MI electrical characteristics before use. Keep the clock trace controlled and isolate it from noisy switching paths.
Digital Logic Frequency Multiplication
When a digital subsystem needs a clock higher than its available crystal or source, the ICS502MI provides a single PLL clock circuit with CMOS output. The 3 V to 5.5 V operating range makes it adaptable to mixed-voltage logic systems, provided the output interface meets the downstream receiver’s voltage and timing requirements. Designers should use the manufacturer’s recommended feedback values and load arrangement to avoid operating the PLL outside its intended conditions. For new platforms, confirm whether the clock tree requires features not listed for the ICS502MI, such as differential outputs.
Legacy Test and Measurement Equipment
ICS502MI is useful when repairing or maintaining legacy test and measurement equipment that uses an 8-SOIC LOCO PLL clock generator. The device can derive a high-quality clock output from a lower-frequency crystal or clock input, with a listed maximum frequency of 140 MHz. Its -40°C to +85°C rating is useful for controlled industrial or laboratory environments, while the 3 V to 5.5 V supply range supports older mixed-voltage designs. Before substituting, verify pin functions, reference topology, output loading, and timing behavior against the original equipment schematic.
Mixed-Voltage Digital Systems
The ICS502MI can support clock-generation blocks in mixed 3.3 V and 5 V digital systems because its listed supply range is 3 V to 5.5 V. The CMOS output and single-circuit architecture make it useful where one compact timing component is preferred over a larger clock tree. Validate output voltage levels against the receiving logic family, and confirm that the selected reference frequency produces the required multiplied clock. The obsolete (EOL) status makes the device best suited to established platforms unless lifecycle approval has already been completed.
Engineering reference data for ICS502MI — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product |
|---|---|
| Product Type | LOCO PLL clock multiplier and clock generator |
| Maximum Frequency | 140 MHz |
| Number of Circuits | 1 |
| Input Type | Clock, crystal |
| Output Type | CMOS |
| Input-to-Output Ratio | 2:2 |
| Supply Voltage Range | 3 V to 5.5 V |
| Operating Temperature Range | -40°C to +85°C |
| Package | 8-SOIC, 0.154 inch width |
| Brand | Renesas Electronics |
| Lifecycle Status | Obsolete (EOL) |
| PLL | Yes |
Key Differentiators
- Single-circuit PLL clock multiplier (vs Generic multi-output clock generators)
- Compact established surface-mount footprint (vs Clock generators in larger QFN or BGA packages)
- Broad stated operating range (vs Commercial-temperature-only alternatives)
Design Notes
Use the manufacturer datasheet to identify the crystal or clock input, feedback, supply, ground, and CMOS output pins before routing the PCB. Keep the reference oscillator path short and isolate it from switching nodes and high-current loads. Place local bypass capacitance close to the supply pins, and use a continuous ground reference beneath and around the clock-generator area.
Treat the CMOS clock output as a high-speed signal. Route it over a continuous reference plane, avoid stubs and unnecessary test pads, and use a controlled-impedance trace when the receiving logic requires one. Keep the feedback and reference components in the manufacturer-recommended placement so the PLL loop has a predictable return path and the output edge rate is not degraded by board-level capacitance.
Do not select another LOCO PLL solely by its advertised maximum frequency. Confirm the 8-SOIC footprint, exact pin functions, crystal or clock-input method, PLL ratio, supply range, CMOS output level, load capability, and temperature rating. The ICS502MI is obsolete (EOL), so any replacement should be treated as a timing-critical qualification item and validated with the original crystal, output load, and system clock requirements.
Compliance Information
No specific RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations were established by the available product information.
