932SQ426

CK420BQ DERIVATIVE SUPPORTING SRNS PCIE CLOCKINGS

IDT®

CK420BQ DERIVATIVE SUPPORTING SRNS PCIE CLOCKINGS

6

932SQ426

REV B 070815

Pin Descriptions (VFQFPN)

PIN #

PIN NAME

TYPE

DESCRIPTION

1GNDPCI

932S

Q426

Ground pin for PCI outputs and logic.

2

VDDPCI

PWR

3

PCI4_2x

OUT 3.3V PCI clock output

4

PCI3_2x

OUT 3.3V PCI clock output

5

PCI2_2x

OUT 3.3V PCI clock output

6

PCI1_2x

OUT 3.3V PCI clock output

7

PCI0_2x

OUT 3.3V PCI clock output

8

GNDPCI

PWR Ground pin for PCI outputs and logic.

9

VDDPCI

PWR 3.3V power for the PCI outputs and logic

10

VDD48

PWR 3.3V power for the 48MHz output and logic

11

48M_2x

OUT 3.3V 48MHz output

12

GND48

PWR Ground pin for 48MHz output and logic.

13

GND96

PWR Ground pin for DOT96 output and logic.

14

DOT96T

OUT

True clock of differential 96MHz output. These are current mode outputs and external series resistors and

shunt resistors are required for termination. See Test Loads and Recommended Terminations for specific

values.

15

DOT96C

OUT

Complementary clock of differential 96MHz output. These are current mode outputs and external series

resistors and shunt resistors are required for termination. See Test Loads and Recommended Terminations

for specific values.

16

AVDD96

PWR 3.3V power for the 48/96MHz PLL and the 96MHz output and logic

17

TEST_MODE

IN

TEST_MODE is a real time input to select between Hi-Z and REF/N divider mode while in test mode. Refer

to Test Clarification Table.

18

CKPWRGD#/PD

IN

CKPWRGD# is an active low input used to sample latched inputs and allow the device to Power Up. PD is

an asynchronous active high input pin used to put the device into a low power state. The internal clocks

and PLLs are stopped.

19

VDDSRC

PWR 3.3V power for the SRC outputs and logic

20

SRC0T

OUT

True clock of differential SRC output. These are current mode outputs and external series resistors and

shunt resistors are required for termination. See Test Loads and Recommended Terminations for specific

values.

21

SRC0C

OUT

Complementary clock of differential SRC output.

These are current mode outputs and external series

resistors and shunt resistors are required for termination. See Test Loads and Recommended Terminations

for specific values.

22

GNDSRC

PWR Ground pin for SRC outputs and logic.

23

SRC1C

OUT

Complementary clock of differential SRC output.

These are current mode outputs and external series

resistors and shunt resistors are required for termination. See Test Loads and Recommended Terminations

for specific values.

24

SRC1T

OUT

True clock of differential SRC output. These are current mode outputs and external series resistors and

shunt resistors are required for termination. See Test Loads and Recommended Terminations for specific

values.

25

SRC2C

OUT

Complementary clock of differential SRC output.

These are current mode outputs and external series

resistors and shunt resistors are required for termination. See Test Loads and Recommended Terminations

for specific values.

26

SRC2T

OUT

True clock of differential SRC output. These are current mode outputs and external series resistors and

shunt resistors are required for termination. See Test Loads and Recommended Terminations for specific

values.

27

VDDSRC

PWR 3.3V power for the SRC outputs and logic

28

AVDD_SRC

PWR 3.3V power for the SRC PLL analog circuits

29

GNDSRC

PWR Ground pin for SRC outputs and logic.

30

IREF

OUT

This pin establishes the reference current for the differential current-mode output pairs. This pin requires a

fixed precision resistor tied to ground in order to establish the appropriate current. 475 ohms is the

standard value.

31

NS_SRC0C

OUT

Complementary clock of differential non-spreading SRC output. These are current mode outputs and

external series resistors and shunt resistors are required for termination. See Test Loads and

Recommended Terminations for specific values.

32

NS_SRC0T

OUT

True clock of differential non-spreading SRC output.

These are current mode outputs and external series

resistors and shunt resistors are required for termination. See Test Loads and Recommended Terminations

for specific values.