932SQ420D

PCIE GEN 2/3 & QPI CLOCK FOR ROMLEY-BASED SERVERS

IDT®

PCIE GEN 2/3 & QPI CLOCK FOR ROMLEY-BASED SERVERS

7

932SQ420D

REV J 010715

Pin Descriptions - 64 MLF (cont).

35

VDDNS

PWR 3.3V power for the Non-Spreading differential outputs outputs and logic

36

GNDNS

PWR Ground pin for non-spreading differential outputs and logic.

37

NS_SAS0C

OUT

Complementary clock of differentia non-spreading SAS output. These are current mode outputs and external

33 ohm series resistors and 49.9 ohm shunt resistors are required for termination.

38

NS_SAS0T

OUT

True clock of differential non-spreading SAS output. These are current mode outputs. These are current

mode outputs and external 33 ohm series resistors and 49.9 ohm shunt resistors are required for termination.

39

NS_SAS1C

OUT

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

33 ohm series resistors and 49.9 ohm shunt resistors are required for termination.

40

NS_SAS1T

OUT

True clock of differential non-spreading SAS output. These are current mode outputs. These are current

mode outputs and external 33 ohm series resistors and 49.9 ohm shunt resistors are required for termination.

41

AVDD_NS_SAS

PWR 3.3V power for the non-spreading SAS/SRC PLL analog circuits.

42

GNDNS

PWR Ground pin for non-spreading differential outputs and logic.

43

CPU0C

OUT

Complementary clock of differential CPU output. These are current mode outputs and external 33 ohm series

resistors and 49.9 ohm shunt resistors are required for termination.

44

CPU0T

OUT

True clock of differential CPU output. These are current mode outputs and external 33 ohm series resistors

and 49.9 ohm shunt resistors are required for termination.

45

CPU1C

OUT

Complementary clock of differential CPU output. These are current mode outputs and external 33 ohm series

resistors and 49.9 ohm shunt resistors are required for termination.

46

CPU1T

OUT

True clock of differential CPU output. These are current mode outputs and external 33 ohm series resistors

and 49.9 ohm shunt resistors are required for termination.

47

VDDCPU

PWR 3.3V power for the CPU outputs and logic

48

GNDCPU

PWR Ground pin for CPU outputs and logic.

49

CPU2C

OUT

Complementary clock of differential CPU output. These are current mode outputs and external 33 ohm series

resistors and 49.9 ohm shunt resistors are required for termination.

50

CPU2T

OUT

True clock of differential CPU output. These are current mode outputs and external 33 ohm series resistors

and 49.9 ohm shunt resistors are required for termination.

51

CPU3C

OUT

Complementary clock of differential CPU output. These are current mode outputs and external 33 ohm series

resistors and 49.9 ohm shunt resistors are required for termination.

52

CPU3T

OUT

True clock of differential CPU output. These are current mode outputs and external 33 ohm series resistors

and 49.9 ohm shunt resistors are required for termination.

53

VDDCPU

PWR 3.3V power for the CPU outputs and logic

54

SMBDAT

I/O

Data pin of SMBUS circuitry, 5V tolerant

55

SMBCLK

IN

Clock pin of SMBUS circuitry, 5V tolerant

56

GND14

PWR Ground pin for 14MH z output and logic.

57

AVDD14

PWR Analog power pin for 14MH z PLL

58

VDD14

PWR Pow er pin for 14MHz output and logic

59

vREF14_3x/TEST_SEL

I/O

14.318 MH z reference clock. 3X drive strength as default / TEST_SEL latched input to enable test mode. R efer

to Test Clarification Table. This pin has a weak (~120Kohm) internal pull down.

60

GND14

PWR Ground pin for 14MH z output and logic.

61

GNDXTAL

PWR Ground pin for Crystal Oscillator.

62

X1_25

IN

Crystal input, N ominally 25.00MHz.

63

X2_25

OUT Crystal output, Nominally 25.00MHz.

64

VDDXTAL

PWR 3.3V power for the crystal oscillator.