522 - 05 - 02

3

PIN CONNECTIONS

AC ELECTRICAL CHARACTERISTICS

PARAMETER

CONDITIONS

SYMBOL

MIN

TYP

MAX

UNITS

TEST

LEVEL

Jitter

100m (8281), PRN and pathological

-

80

135

ps p-p

1

Equalization

Belden 8281

-

100

-

m

1

Belden 1694

-

150

-

m

3

Output Rise/Fall Time

20% - 80%

-

130

270

ps

1

Input Resistance

Single Ended

-

2.8

.

k

Ω

2

Input Capacitance

Single Ended

-

1

-

pF

2

Output Resistance

Single Ended

-

50

-

Ω

2

Output Signal Swing SDO, SDO

Into 50

Ω Loads; See Figure 21.

160

200

240

mVp-p

1

TEST LEVELS: 1. 100% tested at 25°C.

2. Guaranteed by design.

3. Correlated Value.

4. Using EB1504

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

CLI

SDI

SDI

MCLADJ

NC

CD/MUTE

SDO

SDO

NC

NC

GS1504

TOP

VIEW

PIN DESCRIPTIONS

NUMBER

SYMBOL

TYPE

DESCRIPTION

1CLI

O

Cable Length Indication. Provides a voltage output representing the amount of cable being

equalized. See figures 19 and 20. The CLI voltage is an approximation of the cable length

being equalized. It is intended as a guide for troubleshooting the initial design and not as an

accurate indication of cable length.

2, 15

I

Most positive supply voltage.

3, 6, 11, 14

I

Most negative supply voltage.

4, 5

SDI, SDI

I

Differential Input Pins. AC coupled termination is recommended.

7

MCLADJ

I

Adjusts the maximum amount of cable to be equalized (from 0m to the maximum cable

length). The output is muted (latched to the last state) when the maximum cable length is

reached. To achieve maximum cable length, this pin should be left open. See figures 10 - 12.

8, 9, 10

NC

-

No Connect. Do not connect these pins to supply or ground.

12, 13

SDO, SDO

O

Differential Serial Data Output Pins, with 50

Ω output resistance.

16

CD/Mute

I/O

Carrier Detect/Mute Indicator/Control. When the CD/Mute output is low, the carrier is present

and the data output is active. When the CD/Mute output is high, the carrier is not present and

the data output is muted (latched to the last state). This indicates that the maximum cable

length as set by MCLADJ has been reached.

The above default CD/Mute function can be overwritten as follows: if the CD/Mute pin is tied

to ground the data output will not mute and the MCLADJ setting is overwritten. If the mute pin

is tied high, the data output will always mute and the MCLADJ setting is overwritten.