ICS4231-03
LOW EMI CLOCK GENERATOR SSCG
IDT™ / ICS™
LOW EMI CLOCK GENERATOR 4
ICS4231-03 REV A 110404
DC Electrical Characteristics
Unless stated otherwise, VDD = 5V, ±10%, Ambient Temperature 0 to +70° C
Note 1: Pins X1 and X2 each have 34 pF capacitance. When used with a crystal, the total combined
capacitance as seen by the crystal is 17 pF. If driving X1 with a clock input, the load capacitance will be
34 pF.
AC Electrical Characteristics
Unless stated otherwise, VDD = 5V±10%, Ambient Temperature 0 to +70° C, C
L
=15pf
Note 1: Measured with 15pF load
Parameter Symbol Conditions Min. Typ. Max. Units
Operating Voltage VDD 4.5 5 5.5 V
Supply Current IDD No load, at 3.3V 18 32 mA
Input High Voltage V
IH
0.7VDD V
Input Low Voltage V
IL
0.15VDD V
Output High Voltage V
OH
I
OH
= -24mA 2.5 V
Output Low Voltage V
OL
I
OL
= 24mA 0.4 V
Input Capacitance C
IN
All pins except X1, X2 5 7 pF
Load Capacitance X1, X2, as seen by the
xtal, Note 1
17 pF
Output Impedance Rout 20 Ω
Input Pull-Up Resistor 500 KΩ
Power-Up Time First locked clock
cycle after Power
Good
5ms
Parameter Symbol Conditions Min. Typ. Max. Units
Input Frequency Input Clock 10 33 MHz
Output Frequency 10 33 MHz
Input Clock Duty Cycle Time above VDD/2 40 60 %
Output Clock Duty Cycle Note 1 45 50 55 %
Output Rise Time t
OR
0.8 to 2.4V, note 1 2 5 ns
Output Fall Time t
OF
2.4 to 0.8V, note 1 2 5 ns
Jitter cycle-to-cycle 300 ps
Harmonic Reduction 8 dB
