SC72131 データシートの表示（PDF） - Silan Microelectronics

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SC72131

PLL FOR DIGITAL TUNING SYSTEM(DTS)

Silan Microelectronics 

PIN CONFIGURATION (SDIP22, SOP20)

SC72131

PIN DESCRIPTION

Pin NO.

SDIP-22 SOP-20

1

1

22

20

2

3

2

4

3

5

4

6

5

7

6

8

7

9

8

10

9

11

10

13

12

12

11

Pin Name

Description

OSCIN

OSCOUT

NC

PERIOD

DIN

CLOCK

DOUT

OT1

OT2

OT3

OT4

IO1

IO2

IFIN

Connects 4.5M or 7.2M crystal oscillator to supply reference

frequency and internal clock.

--

Serial I/O ports, These pins transfer data to and from the controller

to set divisors and dividing modes, and to control the general-

purpose counter and general-purpose I/O ports.

•N channel open drain port pins.

•The output states are determined by OT1 to OT4 bits in the serial

data.

•If the serial data TBC bit is set to 1, a time base signal (8Hz) can

be output from the OT1 pin.

•These pins are set to the OFF state when power is turn on.

•CMOS structure allows free use of these ports for input or output.

•Ports are set for input when the power is turned on.

•Input pin for measure general-purpose counter frequencies. The

frequency measurement function has such uses as measuring

intermediate frequencies (IF)

•These pin feature built-in amps, Data are input by capacitor

coupling.

(To be continued)

HANGZHOU SILAN MICROELECTRONICS CO.,LTD

Http: www.silan.com.cn

REV:2.0 2004.08.03

Page 4 of 11

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