VT98000 Просмотр технического описания (PDF) - Vaishali Semiconductor
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VT98000 Datasheet PDF : 4 Pages
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VT98000
Advance Information
Table 2. Mode Control and Frequency Selection Table (/PD = HIGH) (1,2)
Pin 9
Control(3)
Pin 1
Pin 10
Outputs
Pin 13
Mode
(Select 24/28MHz).
(24.576 MHz / 28.224 MHz)
(18.43 MHz / 6 MHz)
0
0
High Impedance
0
1
1
0
24.576 MHz
1
1
28.224 MHz
Notes: 1. 27MHz (Pins 18 &19) and 24.576 MHz (Pin 8) are active, unless /PD = LOW
2. 2 kHz standby clock is always active, independent of /PD logic state
3. 0 = Low, 1 = HIGH
18.432 MHz
6 MHz
Table 3. Recommended Crystal Specification
Frequency accuracy is directly proportional to the capacitive load (CL) of the crystal.
Parameter
Definition
Min
Typ
Frequency at CL, FL
Defines the series resonant
frequency at CL
27.000
Total accuracy: includes initial
accuracy @ 25ºC, aging, and
temperature drift (25ºC to 70ºC)
Maximum deviation from
nominal frequency @ 25ºC,
taking in to account aging,
and temperature drift
Load Capacitance CL
Capacitive load for nominal
20
frequency FL
C1
Motional capacitance of the
crystal
C0
Shunt capacitance of the
crystal
ESR
Equivalent Series
Resistance of the crystal
Max
40
TBD
7
40
Units
MHz
ppm
pf
pf
pf
ohms
Table 4. Operating Conditions
Parameter
Power Supply Voltage, VDD
Input High Voltage, VIH
Input Low Voltage, VIL
Operating Temperature,TA
Conditions
Min
Typ
Max Units
3.0
3.3
3.6
V
2.0
VDD
V
0.8
V
0
25
70
ºC
Table 5. Electrical Characteristics
Parameter
Output voltage high IOH = -8 mA
Output voltage low IOL = 8 mA
Maximum input capacitance (X1,X2)
Power consumption (operating)
Power consumption (powerdown)
Symbol
VOH
VOL
Cin
Idd1
Idd2
Min
Typ
Max Units
2.7
V
0.4
V
3
pF
mA
mA
2001-04-17
Vaishali Semiconductor
Page 3
www.vaishali.com
1300 White Oaks Road, Ste. 200 Campbell
CA 95008
Ph. 408.377.6060
MDST-0013-00
Fax 408.377.6063
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