VT98001 查看數據表（PDF） - Vaishali Semiconductor

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VT98001

Multifrequency Synthesizer

Vaishali Semiconductor 

VT98001

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

2001-07-25

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

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