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SLG74190

Pin Description

Pin #

Name

Type

Description

1

VDDA

PWR

3.3V Power supply for PLL

2

GNDA

GND

Ground for PLL

3

IREF

I

A precision resistor is attached to this pin to set the differential output current.

Use 475

Ω , 1% for 100Ω trace.

Use 412

Ω, 1% for 85Ω trace.

4

100M_133M#

I

3.3V tolerant input for input/output frequency selection. An external pull-up or

pull-down resistor is attached to this pin to select the input/output frequency.

Contains internal weak pull-up 100k

Ω resistor.

High = 100MHz output.

Low = 133MHz output.

5

HBW_BYPASS_LBW#

I

Tri-Level input for selecting the PLL bandwidth or bypass mode (refer to trilevel

threshold table).

High = High BW mode

Med = Bypass mode

Low = Low BW mode

6

PWRGD/PWRDN#

I

3.3 V LVTTL input to power up or power down the device.

7

GND

GND

Ground for outputs.

8

VDD

PWR

3.3V power supply for outputs.

9

CLK_IN

I

0.7V Differential Input.

10

CLK_IN#

I

0.7V Differential Input.

11

SA_0

I

3.3 V LVTTL input selecting the address. Tri-level input (refer to tri-level thresh-

old table).

12

SDA

I/O, SE

Open collector SMBus data.

13

SCL

I

SMBus slave clock input.

14

SA_1

I

3.3 V LVTTL input selecting the address. Tri-level input (refer to tri-level thresh-

old table).

15

FB_IN

I

External Feedback input.

16

FB_IN#

I

External Feedback input. Complement.

17

FB_OUT#

O, DIF

External Feedback output.

18

FB_OUT

O, DIF

External Feedback output. Complement.

19

DIF_0

O, DIF

0.7V Differential clock output.

20

DIF_0#

O, DIF

0.7V Differential clock output.

21

VDD

PWR

3.3V power supply for outputs.

22

DIF_1

O, DIF

0.7V Differential clock output.

23

DIF_1#

O, DIF

0.7V Differential clock output.

24

DIF_2

O, DIF

0.7V Differential clock output.

25

DIF_2#

O, DIF

0.7V Differential clock output.

26

GND

GND

Ground for outputs.

27

DIF_3

O, DIF

0.7V Differential clock output.

28

DIF_3#

O, DIF

0.7V Differential clock output.

29

DIF_4

O, DIF

0.7V Differential clock output.