NB6L72

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3

VTD1

D1

D1

SEL1

GND

Q0

Q0

Q1

Q1

GND

SEL0

D0

D0

VTD0

5

678

16

15

14

13

12

11

10

9

1

2

3

4

NB6L72

Exposed Pad (EP)

Figure 2. Pin Configuration (Top View)

Table 1. INPUT/OUTPUT SELECT TRUTH TABLE

SEL0*

SEL1*

Q0

Q1

L

L

D0

D0

H

L

D1

D0

L

H

D0

D1

H

H

D1

D1

*Defaults HIGH when left open

Table 2. PIN DESCRIPTION

Pin

Name

I/O

Description

1

SEL0

LVTTL, LVCMOS

Input

Select Logic Input control that selects D0 or D1 to output Q0. See Table 1, Select Input

Function Table. Pin defaults HIGH when left open

2

D0

LVPECL, CML,

LVDS, LVTTL,

LVCMOS, Input

Noninverted Differential Input. Note 1.

3

D0

LVPECL, CML,

LVDS, LVTTL,

LVCMOS, Input

Inverted Differential Input. Note 1.

4

VTD0

-

Internal 50

W Termination Pin. Note 1.

5

VTD1

-

Internal 50

W termination pin. Note 1.

6

D1

LVPECL, CML,

LVDS, LVTTL,

LVCMOS, Input

Noninverted Differential Input. Note 1.

7

D1

LVPECL, CML,

LVDS, LVTTL,

LVCMOS, Input

Inverted Differential Input. Note 1.

8

SEL1

LVTTL,LVCMOS

Input

Select Logic Input control that selects D0 or D1 to output Q1. See Table 1, Select Input

Function Table. Pin defaults HIGH when left open

9

GND

-

Negative Supply Voltage

10

Q1

LVPECL Output

Inverted Differential Output. Typically Terminated with 50

11

Q1

LVPECL Output

Noninverted Differential Output. Typically Terminated with 50

12

-

Positive Supply Voltage

13

-

Positive Supply Voltage

14

Q0

LVPECL Output

Inverted Differential Reset Input. Typically Terminated with 50

15

Q0

LVPECL Output

Noninverted Differential Reset Input. Typically Terminated with 50

16

GND

-

Negative Supply Voltage

-

EP

-

The Exposed Pad (EP) on the QFN-16 package bottom is thermally connected to the die for

improved heat transfer out of package. The exposed pad must be attached to a heat-sinking

conduit. The pad is not electrically connected to the die, but is recommended to be

electrically and thermally connected to GND on the PC board.

1. In the differential configuration when the input termination pin (VTDn, VTDn) are connected to a common termination voltage or left open,

and if no signal is applied on Dn/Dn input, then the device will be susceptible to self-oscillation.