SL18860DCT

Clock Buffers, Drivers Overview

The SL18860DCT is a 3-channel clock distribution buffer manufactured by Silicon Laboratories Inc. It provides three single-ended LVCMOS outputs from a single input, supporting frequencies from 10MHz to 52MHz. The device operates on a 1.7V to 3.65V supply and features ultra-low phase noise and low current consumption (typical 2.7mA at 1.8V). Each output has independent enable control via OE1/2/3 pins to minimize power usage. Packaged in a 10-pin TDFN (1.4x2.0x0.75 mm), it supports industrial temperatures (-40°C to 85°C) and includes an OE_OSC pin for external oscillator control.

Clock Buffers, Drivers Feature Summary

• Three independent LVCMOS clock outputs with individual enable pins (OE1/2/3)
• Ultra-low additive phase noise: -140 dBc/Hz at 1kHz offset (1.8V)
• Low current consumption: 2.7mA typical at 1.8V; <1µA standby
• Supports 10MHz to 52MHz input frequency range

Clock Buffers, Drivers Applications

• Smart mobile handsets
• Multi-mode RF clock distribution
• Baseband peripheral clock distribution

Clock Buffers, Drivers Procurement Notes

Verify the 'DCT' suffix indicates Tape and Reel shipping format versus the standard Tube packaging for the base part number. Confirm the component is sourced from Silicon Laboratories Inc., as indicated in the datasheet header, despite the Skyworks brand query. Ensure the specific revision (Rev 2.0) matches design requirements.

Clock Buffers, Drivers Selection Notes

Select this component for designs requiring low-power clock buffering with independent channel control. Verify that the load capacitance requirements (max 20pF typ) align with the driven circuits. Note that the datasheet explicitly marks this device as 'Not Recommended for New Designs,' suggesting evaluation of newer alternatives for future projects.

Clock Buffers, Drivers Part Context

This component belongs to the SL18860 family of clock buffers. The 'DC' denotes the 10-pin TDFN package variant, while 'DCT' specifies the tape and reel shipping configuration. It is designed to isolate devices driven by clock outputs to minimize interference in mobile RF applications like WLAN and Bluetooth.

Clock Buffers, Drivers Replacement Considerations

The datasheet explicitly states 'Not Recommended for New Designs.' Engineers should consult Silicon Laboratories for updated timing portfolio recommendations or compatible successor components before finalizing a design.

Clock Buffers, Drivers FAQ

What is the function of the OE_OSC pin?

The OE_OSC pin controls the external TCXO/XO. It outputs a logic low (0) only when all three output enables (OE1, OE2, OE3) are low; otherwise, it outputs high.

How does the device handle standby power consumption?

When all output enables (OE1/2/3) are set to 0, the device enters a standby mode with maximum operating supply current of 1.0µA to 2.0µA depending on VDD.

What is the maximum load capacitance supported?

The maximum load capacitance (CL) for CLKOUT1/2/3 is specified as 20pF typical and 25pF maximum depending on the supply voltage conditions.