ICS91719 Datasheet, PDF (2/10 Pages) Integrated Circuit Systems – Low EMI, Spread Modulating, Clock Generator

ICS91719
Pin Descriptions
PIN # PIN NAME
1
GND
2
X1 _CLKIN
3
X2
4
GNDA
5
VDDA
6
VDD
7
GND
8
CLKOUT
FS_IN0
9
^SPREAD_ENABLE
FS_IN1
10 SDATA
11 SCLK
12 ^PD#
13 **REF_Stop
14 REF_OUT/VDDREF_SEL_1.8V * *
15 VDDREF_SEL_2.5V/3.3V# ^
16 VDDREF
^internal pull-up
**internal pull-down
PIN TYPE DESCRIPTION
PWR
IN
OUT
PWR
PWR
PWR
PWR
OUT
IN
IN
IN
IN
IN
IN
IN/OUT
PWR
PWR
Ground pin for 3V outputs
Crystal input or CLOCKIN input
Crystal output
Analog ground
Analog power supply for 3V
Power supply for 3V
Ground pin for 3V outputs
Modulated clock output
Latched input for input frequency select
Spread enable pin
Latched input for input frequency select
Data pin for I2C circuitry 5V tolerant
Clock pin for I2C circuitry 5V tolerant
Power down
Stop control for REF_CLOCK output STOP:1, RUNNING:0
REF_CLOCK output
REF_CLOCK power supply voltage select
Power supply for REF_CLOCK
0506D—08/16/04
2