VT98001

Advance Information

2001-07-25

Page

2

MDST-0013-00

www.vaishali.com

Vaishali Semiconductor

747 Camden Avenue, Suite C

Campbell

CA 95008

Ph. 408.377.6060

Fax 408.377.6063

Figure 2. Pin Configuration

Table 1. Pin Description

Name

Pin #

Type

Description

Select 24/28 MHz

1

I(PU)

Select 24.576 MHz or 28.224 MHz output

X2

2

O

Crystal connection. Connect to a 27 MHz crystal

X1

3

I

Crystal connection. Connect to a 27 MHz crystal

VDD1

4

P

Connect to 3.3V

VDD2

5

P

Connect to VDD

GND1

6

P

Connect to ground

GND2

7

P

Connect to ground

24.576 MHz

8

O

Clock output, 24.576 MHz

MODE

9

I(PU)

Mode control. See Table 2

24.576 MHz/ 28.224MHz

10

O

Clock output, 24.576 MHz or 28.224 MHz

2 kHz

11

O

Clock output, 2 kHz

/PD

(1)

12

I(PU)

Powerdown control. When LOW, all clocks are disabled except

2kHz standby clock

18.432MHz/6.000MHz

13

O

Clock output, 18.432 MHz or 6.000 MHz

GND3

14

P

Connect to ground

GND4

15

P

Connect to ground

VDD3

16

P

Connect to VDD

VDD4

17

P

Connect to VDD

27 MHz

18,19

O

27 MHz buffered clock outputs

GND5

20

P

Connect to ground

Legend: I = Input

O = Output

P = Power supply connection

I(PU) = Input with a 250k ohm pull up

Note (1). All disabled clock outputs are tristated (high impedance).

VT98001

24.576MHz/28.224MHz

18.432MHz/6.000MHz

VDD2

GND2

X1

GND1

VDD3

24.576MHz

GND4

VDD1

27MHz

Select 24/28MHz

X2

1

2

3

4

5

6

7

8

20

19

18

17

16

15

14

13

9

10

12

11

27MHz

GND3

/PD

2kHz

MODE

GND5

VDD4