SY87702L

12

Micrel, Inc.

M9999-102405

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

EVALUATION BOARD I/O TERMINATION SCHEMES

TCLKC–

R26,

100

Ω

C19

1

2

J14

RCLKC–

R25,

100

Ω

C23

1

2

J10

RDOUTC–

R29,

100

Ω

C27

1

2

J6

R37,

125

Ω

C31

1

2

J1

R36,

83

Ω

RDIN+:FORCE

TCLKC+

R27,

100

Ω

C20

1

2

J13

RCLKC+

R24,

100

Ω

C24

1

2

J9

RDOUTC+

R28,

100

Ω

C28

1

2

J5

RDIN+: SENSE

C32

1

2

J2

TCLKE–

R30,

330

Ω

C21

1

2

J12

RCLKE–

R32,

330

Ω

C25

1

2

J8

RDOUTE+

R34,

330

Ω

C29

1

2

J4

R39,

125

Ω

C33

1

2

J17

R38,

83

Ω

RDIN–:FORCE

TCLKE+

R31,

330

Ω

C22

1

2

J11

RCLKE+

R33,

330

Ω

C26

1

2

J7

RDOUTE+

R35,

330

Ω

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 50

Ω CML systems, include resistors R24–R29.

4. For 100

Ω CML systems, see Figure 3.