SL28EB742ALI Silicon Labs

SL28EB742 Not Recommended for New Designs EPROCLOCK GENERATOR FOR INTEL CK505 COMPLIANCE Features Compliant Intel CK505 Clock spec 25 MHz ouput Low power push-pull type differential Buffered Reference Clock output buffers 14.318 MHz Integrated resistors on differential 14.318 MHz Crystal Input or Clock clocks input 2 Wireless friendly 3-bits slew rate I C support with readback control on single-ended clocks capabilities Differential CPU clocks with pin Triangular Spread Spectrum profile selectable frequency for maximum electromagnetic 100 MHz Differential SRC clocks interference (EMI) reduction Selectable Differential SATA or SRC Industrial Temperature: Ordering Information: clocks 40 to 85 C See page 39 96 MHz Differential DOT clock 3.3 V power supply 48 MHz USB clock 56-pin QFN package Selectable 12 or 48 MHz clock Pin Assignments Selectable Differential SRC or CPU Clock CPU SRC SATA DOT96 48M 48M/ 33M 25M 14.318M 12M x2/x3 x4/x7 x0/x1 x1 x1/2 x1 x2 x1 x1 EProClock Programmable Technology > 4000 bits of configurations Differential amplitude control Can be configured through SMBus Differential and single-ended or hard coded slew rate control Custom frequency sets Program Internal or External series resistor on single-ended Differential skew control on true or compliment or both clocks Differential duty cycle control on true Program different spread profiles or compliment or both Program different spread modulation rate Selectable Differential SRC or CPU Clock * Internal 100K-ohm pull-up resistor CPU SRC SATA DOT96 48M 48M/ 33M 25M 14.318M ** Internal 100K-ohm pull down resistor 12M x2/x3 x4/x7 x0/x1 x1 x1/2 x1 x2 x1 x1 Patents pending Rev. 1.0 12/13 Copyright 2013 by Silicon Laboratories SL28EB742 This information applies to a product under development. Its characteristics and specifications are subject to change without notice. Not Recommended for New Designs CKPWRGD/PD SL28EB742 Description The SL28EB742 is a high-performance clock generator supporting Intel Cedarview platforms. The SL28EB742 is rated to support extended grade temperature. Utilizing an inexpensive 14.318MHz crystal, it is capable of supporting multiple frequencies from four PLLs. The CPU clock can support a frequency range from 83.33 to 166 MHz by configuration of two strap 2 pins. With a combination of strap pins and an I C interface, the device allows maximum configurability. EProClock is the worlds first non-volatile programmable clock. The EProClock technology allows board designer to promptly achieve optimum compliance and clock signal integrity historically, attainable typically through device and/or board redesigns. EProClock technology can be configured through SMBus or hard coded. Functional Block Diagram Crystal/ XIN REF 1:0 CLKIN XOUT CPU PLL 1 Divider (SSC) SRC FS C:A PCI PLL 4 CPU STP Divider (non-SSC) SATA / SRC0 ITP EN PCI/SRC STP DOT96 PLL 3 Divider (non-SSC) CLKREQ 3:1 48M SEL SATA 12 / 48M PLL 2 Divider (non-SSC) SEL 12 48 25M OTP SCLK SDATA Logic Core VR CLKPWRGD/ PD 2 Rev. 1.0 Not Recommended for New Designs