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Product Detailed Parameters
- Description：IC CLK BUFFER 1:4 HCSL 20-TSSOP
- Series：-
- PLL：No
- Mfr：Renesas Electronics Corporation
- Main Purpose：PCI Express (PCIe)
- Input：HCSL, LVDS
- Output：HCSL, LVDS
- Number of Circuits：1
- Ratio - Input:Output：2:04
- Differential - Input:Output：Yes/Yes
- Frequency - Max：200MHz
- Voltage - Supply：3.135V ~ 3.465V
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：20-TSSOP (0.173", 4.40mm Width)
- Supplier Device Package：20-TSSOP
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Overview
The ICS557GI-06 is a two-to-four differential clock multiplexer designed for PCI Express applications. It selects one of two differential HCSL or LVDS input pairs and fans out to four pairs of differential outputs. The device operates at a supply voltage of 3.135V to 3.465V with a maximum frequency of 200 MHz for HCSL and 100 MHz for LVDS. Key electrical parameters include a cycle-to-cycle jitter of 60 ps, an output-to-output skew of 50 ps, and an operating temperature range of -40°C to +85°C.
Feature Summary
- Two-to-four differential clock mux supporting HCSL and LVDS signaling
- Maximum input frequency of 200 MHz (HCSL) or 100 MHz (LVDS)
- Cycle-to-cycle jitter specification of 60 ps
- Output-to-output skew limited to 50 ps
Applications
- PCI Express system clock distribution
- Differential clock signal routing in embedded systems
Procurement Notes
Verify the specific ordering suffix to confirm package type and temperature rating. The 'LF' suffix indicates lead-free packaging compliant with RoHS standards. The 'I' suffix denotes the industrial temperature range (-40°C to +85°C). Confirm availability as non-green parts may have reached end-of-life status.
Selection Notes
Select this component when a 2:4 fan-out buffer is required for PCIe designs. Ensure the input source matches the supported HCSL or LVDS levels. Verify that the external termination resistors align with the specified 50 ohm trace impedance requirements for optimal signal integrity.
Part Context
This part belongs to the ICS557 series of clock buffers and muxes from Integrated Device Technology (IDT), now part of Renesas Electronics. It serves as a fan-out buffer solution for high-speed serial interfaces like PCI Express Gen 1.
Replacement Considerations
Direct replacements include the ICS557G-06 (commercial temperature) or ICS557GI-06LF (industrial temperature, tape and reel). Verify pin compatibility and electrical specifications before substitution.
FAQ
What is the maximum input frequency for LVDS signals?
The maximum input frequency for LVDS signals is 100 MHz.
How is the input pair selected?
Input selection is controlled by the SEL pin; SEL=1 selects IN1/IN1, while SEL=0 selects IN2/IN2.
What are the power-down characteristics?
When the PD pin is low, the chip powers down and tri-states the outputs.
