VT98000
Advance Information
(1,2)
Table 2. Mode Control and Frequency Selection Table (/PD = HIGH)
Control
Pin 9
Mode
0
0
1
1
(3)
Outputs
Pin 10
(24.576 MHz / 28.224 MHz)
High Impedance
Pin 13
(18.43 MHz / 6 MHz)
18.432 MHz
Pin 1
(Select 24/28MHz).
0
1
0
1
24.576 MHz
6 MHz
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
Table 3. Recommended Crystal Specification
Frequency accuracy is directly proportional to the capacitive load (CL) of the crystal.
Parameter
Frequency at CL, FL
Total accuracy: includes initial
accuracy @ 25ºC, aging, and
temperature drift (25ºC to 70ºC)
Load Capacitance CL
C1
C0
ESR
Definition
Defines the series resonant
frequency at CL
Maximum deviation from
nominal frequency @ 25ºC,
taking in to account aging,
and temperature drift
Capacitive load for nominal
frequency FL
Motional capacitance of the
crystal
Shunt capacitance of the
crystal
Equivalent Series
Resistance of the crystal
Min
Typ
27.000
Max
Units
MHz
40
ppm
20
TBD
7
40
pf
pf
pf
ohms
Table 4. Operating Conditions
Parameter
Power Supply Voltage, V
DD
Input High Voltage, V
IH
Input Low Voltage, V
IL
Operating Temperature,T
A
0
25
Conditions
Min
3.0
2.0
Typ
3.3
Max
3.6
V
DD
0.8
70
Units
V
V
V
ºC
Table 5. Electrical Characteristics
Parameter
Output voltage high I
OH
= -8 mA
Output voltage low I
OL
= 8 mA
Maximum input capacitance (X1,X2)
Power consumption (operating)
Power consumption (powerdown)
Symbol
VOH
VOL
Cin
I
dd1
I
dd2
Min
2.7
Typ
Max
0.4
3
Units
V
V
pF
mA
mA
2001-04-17
Vaishali Semiconductor
Page
3
www.vaishali.com
1300 White Oaks Road, Ste. 200 Campbell
MDST-0013-00
CA 95008
Ph. 408.377.6060
Fax 408.377.6063
VAISH [ VAISHALI SEMICONDUCTOR ]
