82P33741 SHORT FORM DATA SHEET

PORT SYNCHRONIZER FOR IEEE 1588 AND

10G/40G SYNCHRONOUS ETHERNET

8

REVISION 1 09/23/14

1.1

RECOMMENDATIONS FOR UNUSED INPUT AND OUTPUT PINS

1.1.1

INPUTS

Control Pins

All control pins have internal pull-ups or pull-downs; additional resis-

resistor can be used.

Single-Ended Clock Inputs

For protection, unused single-ended clock inputs should be tied to

ground.

Differential Clock Inputs

For applications not requiring the use of a differential input, both

*_POS and *_NEG can be left floating. Though not required, but for

XTAL Inputs

For applications not requiring the use of a crystal oscillator input,

both _IN and _OUT can be left floating. Though not required, but for

1.1.2

OUTPUTS

Status Pins

For applications not requiring the use of a status pin, we recommend

bringing out to a test point for debugging purposes.

Single-Ended Clock Outputs

All unused single-ended clock outputs can be left floating, or can be

brought out to a test point for debugging purposes.

Differential Clock Outputs

All unused differential outputs can be left floating. We recommend

that there is no trace attached. Both sides of the differential output pair

should either be left floating or terminated.

Power & Ground

C1, C6, C7, D2, F2, F9,

G2, H2, K1, K2

VDDA

Power

-

VDDA: Analog Core Power - +3.3V DC nominal

A5, A7, B2, B3, L4, M4

VDDAO

Power

VDDAO: Analog Output Power - +3.3V DC nominal

E4, E6, L7, M8

VDDDO

Power

VDDDO: Digital Output Power - +3.3V DC nominal

D5, F7

VDDD

Power

VDDD: Digital Core Power - +3.3V DC nominal

L10, H12

VDDD_1_8

Power

VDDD_1_8: Digital Core Power - +1.8V DC nominal

B9, C2, D1, D6, D7, E2,

E8, F3, F8, H3, L1, L2

VSSA

Ground

-

VSSA: Ground

B1, B4, B5, B7, K4, M3

VSSAO

Ground

VSSAO: Ground

E7, F4, K7, M7

VSSDO

Ground

VSSDO: Ground

D4, F6, H11, L9

VSSD

Ground

VSSD: Ground

D3

VSSCOM

Ground

-

VSSCOM: Ground

C3, F5, G4, G5, G6, G8,

H4, H5, H6, H7, H8, J3,

J4, J5, J6, J7, J8

VSS

Ground

-

VSS: Ground

Other

C8, C10, E3, G3, G7, K8

IC

-

-

IC: Internal Connection

Internal Use. This pin must be left open for normal operation.

Table 1: Pin Description (Continued)

Pin No.

Name

I/O

Type

Description