1.3GHZ DUAL PLL

S1T8825B

3

PIN DESCRIPTION

ABSOLUTE MAXIMUM RATINGS

Pin No.

Symbol

I/O

Description

1

Fin1

I

Input terminal of channel 1 RF signal.

2, 15

Vcc

−

Power supply voltage input. PIN2 and PIN15 are connected together.

3

CP1

O

Output terminal of channel 1 charge pump. Charge pump is constant current output

circuit, and output current is selected by input serial data.

4, 13

GND

−

Terminal of GND. PIN4 and PIN13 are connected together.

5

LD

O

Output terminal of lock detection. It is the open drain output.

6

CK

I

Input terminal of clock.

7

DATA

I

Input terminal of data.

8

EN

I

Input terminal of enable signal.

9

BO

O

Output terminal of buffer amplifier. The signal of local oscillation is output through the

buffer amplifier.

10

OSCO

O

Output terminal of local oscillation signal.

11

OSCI

I

Input terminal of local oscillation signal.

In case of external input, connecting it to this terminal.

12

SW

O

Switch-over terminal for the time constant of loop filter. It is an open drain output.

If you don’t switch the time constant of loop filter, general output is available.

14

CP2

O

Output terminal of channel 2 charge pump. Charge pump is a constant current output

circuit, and the output current is selected by input serial data.

16

Fin2

I

Input terminal of channel 2 RF signal.

Characteristic

Symbol

Value

Unit

Power Supply Voltage

Vcc

6

V

Power Dissipation

600

mW

Operating temperature

−30 to + 85

°C

Storage temperature

−55 to +150

°C

Take care ! ESD sensitive device