SI51218 Datasheet, PDF (1/13 Pages) Silicon Laboratories – THREE OUTPUTS FACTORY PROGRAMMABLE CLOCK GENERATOR

Si51218
THREE OUTPUTS FACTORY PROGRAMMABLE CLOCK
GENERATOR
Features
 Generates up to 3 LVCMOS  Separate voltage supply pins
clock outputs from 32.768 kHz to _{VDD = 2.5 to 3.3 V}
200 MHz
 Accepts crystal or reference
clock input
V_DDO= 1.8 to 3.3 V (V_DDO ≤ V_DD)
 Low cycle-cycle jitter
 Programmable output rise and
3 to 166 MHz reference clock input _{fall times}
8 to 48 MHz crystal input
 Programmable FSEL, PD and
OE input functions
 Ultra small 8-pin TDFN package
(1.4 mm x 1.6 mm)
 Low power dissipation
 Operation temperature: 0–70 C
Applications
 Crystal / XO replacement
 Digital Media players
 Portable Devices
 DTV/IPTV
Ordering Information:
See page 10.
Pin Assignments
Description
The factory programmable Si51218 is a low power, small footprint and
frequency flexible programmable clock generator targeting low power, low
cost and high volume consumer and embedded applications. The device
operates from a single crystal or an external clock source and generates
up to 3 clock outputs from 32.768 kHz to 200 MHz. They are factory
programmed to provide customized output frequencies, control inputs and
ac parameter tuning like output drive strength that are optimized for
customer board condition and application requirements. A separate
VDDO supply pin supports clock outputs at a different voltage level.
VDD ¹
XOUT 2
XIN/CLKIN 3
CLKOUT1/REFOUT1 ₄
FSEL/OE
Si51218
8 VDDO
7 CLKOUT3
6 ^{CLKOUT2/REFOUT2}
FSEL/OE/PD#
5 VSS
Patents pending
Functional Block Diagram
XIN/CLKIN 3
XOUT 2
VDDO 8
VDD 1
VSS 5
PLL with
Modulation Control
To Pin 6/7 Clock Drivers
Programmable
Configuration Register
V-Reg
To Core
To Pin 4 Clock Driver and
Oscillator
Buffers,
Dividers
and
Switch
Matrix
4 ^{CLKOUT1/REFOUT1(VDD)}
OE/FSEL
6 ^{CLKOUT2/REFOUT2(VDDO)}
OE/FSEL/PD#
7 CLKOUT3(VDDO)
Rev. 1.0 3/14
Copyright © 2014 by Silicon Laboratories
Si51218