Si53112

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Rev. 1.1 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • September 2, 2021

Table 25. Si53112 64-Pin QFN Descriptions

Pin #

Name

Type

Description

1VDDA

3.3 V 3.3 V power supply for PLL.

2

GNDA

GND Ground for PLL.

3NC

I/O

No connect.

4

100M_133M

I,SE

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

up or pull-down resistor is attached to this pin to select the input/output

frequency.

High = 100 MHz output

Low = 133 MHz output

5

HBW_BYPASS_LBW

I, SE Tri-Level input for selecting the PLL bandwidth or bypass mode.

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.

7GND

GND Ground for outputs.

8

VDDR

VDD 3.3 V power supply for differential input receiver. This VDDR should be

treated as an analog power rail and filtered appropriately.

9

CLK_IN

I, DIF 0.7 V Differential input.

10

CLK_IN

I, DIF 0.7 V Differential input.

11

SA_0

I

3.3 V LVTTL input selecting the address. Tri-level input.

12

SDA

I/O

Open collector SMBus data.

13

SCL

I/O

SMBus slave clock input.

14

SA_1

I

3.3 V LVTTL input selecting the address. Tri-level input.

15

NC

I/O

No connect. There are active signals on pin 15 and 16, do not connect

anything to these pins.

16

NC

I/O

No connect. There are active signals on pin 15 and 16, do not connect

anything to these pins.

17

DIF_0

O, DIF 0.7 V Differential clock outputs. Default is 1:1.

18

DIF_0

O, DIF 0.7 V Differential clock outputs. Default is 1:1.

19

OE_0

I, SE 3.3 V LVTTL active low input for enabling differential outputs (default).

Controls the corresponding output pair. Internal pull-down.

20

OE_1

I, SE 3.3 V LVTTL active low input for enabling differential outputs (default).

Controls the corresponding output pair. Internal pull-down.

21

DIF_1

O, DIF 0.7 V Differential clock outputs. Default is 1:1.

22

DIF_1

O, DIF 0.7 V Differential clock outputs. Default is 1:1.

23

GND

GND Ground for outputs.