SY87702L

12

Micrel, Inc.

M9999-072706

hbwhelp@micrel.com or (408) 955-1690

EVALUATION BOARD I/O TERMINATION SCHEMES

TCLKC–

R26,

100Ω

C19

1

2

J14

RCLKC–

R25,

100Ω

C23

1

2

J10

RDOUTC–

R29,

100Ω

C27

1

2

J6

R37,

125Ω

C31

1

2

J1

R36,

83Ω

RDIN+:FORCE

TCLKC+

R27,

100Ω

C20

1

2

J13

RCLKC+

R24,

100Ω

C24

1

2

J9

RDOUTC+

R28,

100Ω

C28

1

2

J5

RDIN+: SENSE

C32

1

2

J2

TCLKE–

R30,

330Ω

C21

1

2

J12

RCLKE–

R32,

330Ω

C25

1

2

J8

RDOUTE+

R34,

330Ω

C29

1

2

J4

R39,

125Ω

C33

1

2

J17

R38,

83Ω

RDIN–:FORCE

TCLKE+

R31,

330Ω

C22

1

2

J11

RCLKE+

R33,

330Ω

C26

1

2

J7

RDOUTE+

R35,

330Ω

C30

1

2

J3

RDIN–: SENSE

C34

1

2

J18

TCLK

RCLK

RDOUT

RDIN

OUTPUTS

OUTPUTS

INPUTS

INPUTS

NOTES:

1. For AC coupling, include capacitors C19 thru C31, C33, C35 and C37.

2. If DC coupling, remove resistors R36 thru R43.

3. For 50Ω CML systems, include resistors R24–R29.

4. For 100Ω CML systems, see Figure 3.