Data Sheet #: SG035

Page 3 of 20

Rev: 00

Date: 08/23/04

© Copyright 2004 The Connor-Winfield Corp.

Typical Application

Figure 2

Pin Description

Table 2

All SCG2000 Models

Pin #

Connection

Description

1

Reference Output

Output frequency is dependent on SCG model

2

TCK

JTAG pin that is used only by Connor-Winfield for programming. Do not connect

3

TMS

JTAG pin that is used only by Connor-Winfield for programming. Do not connect

4

Ground

Ground

5

Free Run Enable/TDI

Free Run enable pin. 1 = Free Run at nominal frequency ±20ppm. Input is pulled to

GND

6

Loss of Reference (LOR)

Alarm indicator. 1 = The reference has been lost.

7

Loss of Lock (LOL)

Alarm indicator. 1 = Phase lock has been lost

8

Reference Input

Input reference frequency

9

Oscillator Output

Output frequency is dependent on SCG model

10

Tri-State enable

Tri State control for all outputs except Oscillator Output. 1 = Hi-Z, 0 = normal.

Input is pulled to GND.

11

Vcc

3.3V Supply Voltage.

12

TDO

JTAG pin that is used only by Connor-Winfield for programming. Do not connect

13

Input Freq. Select B

Control pin B used to select input frequency. Input is pulled to GND.

14

Input Freq. Select A

Control pin A used to select input frequency. Input is pulled to GND.

Input Select

MUX

MUX

MUX

MUX

System Select

BITS

System

Signal

CW's STM/MSTM module

CW's STM/MSTM module

CW's SCG

2000/4000

CW's SCG

2000/4000

A

B

S

Y

A

B

Y

S

A

B

A

B

S

Y

S

Y

Timing Card #1

Timing Card #N

Line Card 1

RCV

RCV

Clock out

Clock out

Line Card #N