82P33741 Datasheet, PDF (12/61 Pages) Integrated Circuit Systems – Differential reference inputs

82P33741 Datasheet
Table 1: Pin Description (Continued)
Pin No.
L10, H12
B9, C2, D1, D6, D7, E2,
E8, F3, F8, H3, L1, L2
B1, B4, B5, B7, K4, M3
E7, F4, K7, M7
D4, F6, H11, L9
D3
C3, F5, G4, G5, G6, G8,
H4, H5, H6, H7, H8, J3,
J4, J5, J6, J7, J8
Name
VDDD_1_8
VSSA
VSSAO
VSSDO
VSSD
VSSCOM
VSS
I/O
Power
Ground
Ground
Ground
Ground
Ground
Ground
C8, C10, E3, G3, G7, K8
K9, K10, L6, M9, M10
IC
-
Type
Description
VDDD_1_8: Digital Core Power - +1.8V DC nominal
-
VSSA: Ground
VSSAO: Ground
VSSDO: Ground
VSSD: Ground
-
VSSCOM: Ground
VSS: Ground
-
Other
-
IC: Internal Connection
Internal Use. This pin must be left open for normal operation.
2.1 RECOMMENDATIONS FOR UNUSED INPUT AND OUTPUT PINS
2.1.1
INPUTS
XTAL Inputs
Control Pins
All control pins have internal pull-ups or pull-downs; additional resis-
tance is not required but can be added for additional protection. A 1kΩ
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
additional protection, a 1kΩ resistor can be tied from _POS to ground.
For applications not requiring the use of a crystal oscillator input,
both _IN and _OUT can be left floating. Though not required, but for
additional protection, a 1kΩ resistor can be tied from _IN to ground.
2.1.2
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.
©2016 Integrated Device Technology, Inc.
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Revision 6, July 21, 2016