VT98001

Advance Information

2001-07-25

Page

3

MDST-0013-00

www.vaishali.com

Vaishali Semiconductor

747 Camden Avenue, Suite C

Campbell

CA 95008

Ph. 408.377.6060

Fax 408.377.6063

Table 2. Mode Control and Frequency Selection Table (/PD = HIGH)

(1,2)

Control

(3)

Outputs

Pin 9

Mode

Pin 1

(Select 24/28MHz).

Pin 10

(24.576 MHz / 28.224 MHz)

Pin 13

(18.43 MHz / 6 MHz)

0

0

0

1

High Impedance

18.432 MHz

1

0

24.576 MHz

1

1

28.224 MHz

6 MHz

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

Definition

Min

Typ

Max

Units

Frequency at CL, FL

Defines the series resonant

frequency at CL

27.000

MHz

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

40

ppm

Load Capacitance CL

Capacitive load for nominal

frequency FL

20

pf

C1

Motional capacitance of the

crystal

TBD

pf

C0

Shunt capacitance of the

crystal

7

pf

ESR

Equivalent Series

Resistance of the crystal

40

ohms

Table 4. Operating Conditions

Parameter

Conditions

Min

Typ

Max

Units

3.0

3.3

3.6

V

2.0

V

0.8

V

0

25

70

ºC

Table 5. Electrical Characteristics

Parameter

Symbol

Min

Typ

Max

Units

VOH

2.7

V

VOL

0.4

V

Maximum input capacitance (X1,X2)

Cin

3

pF

Power consumption (operating)

mA

Power consumption (powerdown)

mA