8-OUTPUT CK420BQ DERIVATIVE

4

OCTOBER 28, 2016

9SQL4958 DATASHEET

Pin Descriptions, cont.

Test Loads

Alternate Terminations

The 9SQL family can easily drive LVPECL, LVDS, and CML logic. See “AN-891 Driving LVPECL, LVDS, and CML Logic with

IDT's "Universal" Low-Power HCSL Outputs” for details.

PIN #

PIN NAME

TYPE

DESCRIPTION

40

GND

GND

Ground pin.

41

BCLK6

OUT

True output of differential BCLK.

42

BCLK6#

OUT

Complement output of differential BCLK.

43

vOE6#

IN

Active low input for enabling output 6. This pin has an internal 120kohm pull-

down.

1 =disable outputs, 0 = enable outputs

44

BCLK7

OUT

True output of differential BCLK.

45

BCLK7#

OUT

Complement output of differential BCLK.

46

vOE7#

IN

Active low input for enabling output 7. This pin has an internal 120kohm pull-

down.

1 =disable outputs, 0 = enable outputs

47

VDDIO

PWR

Power supply for differential outputs

48

^CKPWRGD_PD#

IN

Input notifies device to sample latched inputs and start up on first high

assertion. Low enters Power Down Mode, subsequent high assertions exit

Power Down Mode. This pin has internal 120kohm pull-up resistor.

49

EPAD

GND

Connect to Ground.

REF Output

33

REF Output Test Load

5pF

Zo = 50 ohms

Rs

Rs

Low-Power Differential Output Test Load

2pF

2pF

5 inches

Zo=85ohm

Note: The device can drive transmission line lengths greater

than those specified by the PCIe SIG

Terminations

Zo (Ω)Rs (Ω)

85

0

100

7.5