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| W6694 Datasheet, PDF (29/33 Pages) Winbond – USB Bus ISDN S/T-Controller | |||
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Preliminary W6694
Capacitances of ISDN Pins
TA = 25 °C, VDD = 5 V ±5%, VSSA = 0V, VSSD = 0V, fc = 1 MHz, unmeasured pins grounded.
PARAMETER
SYMBOL MIN. MAX.
Output Capacitance Against VSSA
COUT
10
Input Capacitance
CIN
7
Load Capacitance
CL
50
UNIT
pF
pF
pF
REMARKS
SX1, 2
SR1, 2
XTAL1, 2
Recommended Oscillator Circuits
CL
External
XTAL1
oscillator
signal
7.68MHz CLâ¤50pF or
XTAL1
XTAL2
N.C.
XTAL2
CL
Crystal specifications
PARAMETER
SYMBOL VALUES
UNIT
Frequency
f
7.680
MHz
Frequency Calibration Tolerance
Max. 100
ppm
Load Capacitance
Oscillator Mode
CL
Max. 50
pF
Fundamental
Note: The load capacitance CL depends on the crystal specification. The typical values are 33 to 47 pF.
External ocsillator input (XTAL1) clock characteristics
PARAMETER
Duty cycle
MIN.
1:2
MAX.
2:1
- 29 -
Publication Release Date: October 2000
Revision A1
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