SY87700 Datasheet, PDF (5/8 Pages) Micrel Semiconductor – CDR EVALUATION KIT

Micrel
DESCRIPTION OF CONNECTORS
Connector
J1
J2
J3
J4
J5
J6
J7
J8
J9
J10
J11
J12
Name
RDIN+_S
RDIN–_S
REFCLK–S
RDIN+_F
RDIN–_F
REFCLK_F
TCLK–
TCLK+
RCLK–
RCLK+
RDOUT–
RDOUT+
Type
PECL
PECL
TTL
PECL
PECL
PECL
PECL
PECL
PECL
PECL
PECL
PECL
Connects to
28-pin SOIC
Pin 4
Pin 5
Pin 7
Pin 4
Pin 5
Pin 7
Pin 18
Pin 19
Pin 21
Pin 22
Pin 24
Pin 25
32-pin TQFP
Pin 2
Pin 3
Pin 5
Pin 2
Pin 3
Pin 5
Pin 17
Pin 18
Pin 20
Pin 21
Pin 23
Pin 24
Description
RDIN+ (Sense)
RDIN– (Sense)
REFCLK– (Sense)
RDIN+ (Force)
RDIN– (Force)
REFCLK– (Force)
TCLK– (Output)
TCLK+ (Output)
RCLK– (Output)
RCLK+ (Output)
RDOUT– (Output)
RDOUT+ (Output)
SY87700/701
Evaluation Board
ALL POSSIBLE LEGAL FREQUENCY AND DIVIDER SELECTIONS
FREQSEL1
0
1
1
1
1
0
0
FREQSEL2
1
0
0
1
1
1
0
FREQSEL3
1
0
1
0
1
0
X⁽²⁾
f_VCO/f_RCLK
6
8
12
16
24
—
—
f_RCLK Data Rates (Mbps)
125 –175
94 – 157
63 – 104
47 – 78
32 – 52
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NOTES:
1. SY87700L operates from 32-175MHz. For higher speed applications, the SY87701L operates from 32-1250MHz.
2. X is a DON'T CARE.
DIVSEL1
0
0
1
1
DIVSEL2
0
1
0
1
f_RCLK / f_REFCLK
8
10
16
20
Table 1. M-Divider, f_RCLK / f_REFCLK Divider Setting
5