CDC421A100 Datasheet, PDF (3/15 Pages) Texas Instruments – Fully-Integrated, Fixed-Frequency, Low-Jitter Crystal Oscillator Clock Generator

CDC421AXXX
www.ti.com ....................................................................................................................................................................................................... SCAS875 – MAY 2009
ELECTRICAL CHARACTERISTICS
Over recommended operating conditions (unless otherwise noted).
PARAMETER
V_CC
Supply voltage
I_VCC
Total current
LVPECL OUTPUT
f_CLK
V_OH
V_OL
|V_OD|
t_R
t_F
Output frequency
LVPECL high-level output voltage
LVPECL low-level output voltage
LVPECL differential output voltage
Output rise time
Output fall time
Duty cycle of the output waveform
t_j
RMS jitter
LVCMOS INPUT
V_{IL, CMOS}
V_{IH, CMOS}
I_{L, CMOS}
I_{H, CMOS}
Low-level CMOS input voltage
High-level CMOS input voltage
Low-level CMOS input current
High-level CMOS input current
TEST CONDITIONS
20% to 80% of V_OUT(PP)
20% to 80% of V_OUT(PP)
10 kHz to 20 MHz
V_CC = 3.3 V
V_CC = 3.3 V
V_CC = V_{CC, max}, V_IL = 0.0 V
V_CC = V_{CC, min}, V_IH = 3.7 V
CDC421Axxx
MIN
TYP
3.00
3.30
91
MAX
3.60
110
UNIT
V
mA
100
V_CC – 1.20
V_CC – 2.17
407
45
312.5 MHz
V_CC – 0.81
V
V_CC – 1.36
V
1076 mV
230
ps
230
ps
55 %
1 ps, RMS
0.7 × V_CC
0.3 × V_CC
V
V
–200 µA
200 µA
FUNCTIONAL BLOCK DIAGRAM
XIN 1
XIN 2
Crystal
Oscillator
Feedback
Divider
PFD/
Charge Pump
Loop Filter
VCO
Prescaler
Output
Divider
Figure 1. CDC421Axxx: High-Level Block Diagram
Copyright © 2009, Texas Instruments Incorporated
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