Datasheet

____________________________________________________ DS34T101, DS34T102, DS34T104, DS34T108
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16 PIN ASSIGNMENT
16.1 Board Design for Multiple DS34T10x Devices
All devices in the DS34T10x family require the same footprint on the board. It is recommended that boards be
design to support the use of higher port-count devices in a lower port-count socket. If this is done, unused inputs,
input/outputs, and outputs must be biased appropriately. Generally, unused inputs are tied directly to the ground
plane, unused outputs are not connected, and unused input/outputs are tied to ground through a 10kΩ resistor.
Unused inputs with internal pull-ups or pull-downs are not connected. Table 16-1 de
signates how each ball on the
package should be connected to implement a common board design. Shading indicates balls for the unused
inputs, input/outputs, and outputs of higher port-count devices.
If a common board design is not done, the balls for the unused inputs, input/outputs, and outputs need not be
connected, and the stuffing of higher port-count devices into a lower port-count socket is not recommended.
Note: When a higher port-count device is used in a socket, the BSDL file of the higher port-count device must be
used. BSDL files are available from the factory upon request.
Table 16-1. Common Board Design Connections
BALL DS34T108 Socket
DS34T104 Socket DS34T102 Socket DS34T101 Socket
M2
ACVDD1 ACVDD1 ACVDD1 ACVDD1
K2
ACVDD2 ACVDD2 ACVDD2 ACVDD2
M1
ACVSS1 ACVSS1 ACVSS1 ACVSS1
K1
ACVSS2 ACVSS2 ACVSS2 ACVSS2
B14
ARVDD1 ARVDD1 ARVDD1 ARVDD1
B10
ARVDD2 ARVDD2 ARVDD2 ARVDD2
B2
ARVDD3 ARVDD3 ARVDD3 ARVDD3
F2
ARVDD4 ARVDD4 ARVDD4 ARVDD4
U2
ARVDD5 ARVDD5 ARVDD5 ARVDD5
AA2
ARVDD6 ARVDD6 ARVDD6 ARVDD6
AA11
ARVDD7 ARVDD7 ARVDD7 ARVDD7
AA13
ARVDD8 ARVDD8 ARVDD8 ARVDD8
A14
ARVSS1 ARVSS1 ARVSS1 ARVSS1
A10
ARVSS2 ARVSS2 ARVSS2 ARVSS2
B1
ARVSS3 ARVSS3 ARVSS3 ARVSS3
F1
ARVSS4 ARVSS4 ARVSS4 ARVSS4
U1
ARVSS5 ARVSS5 ARVSS5 ARVSS5
AA1
ARVSS6 ARVSS6 ARVSS6 ARVSS6
AB11
ARVSS7 ARVSS7 ARVSS7 ARVSS7
AB13
ARVSS8 ARVSS8 ARVSS8 ARVSS8
B16
ATVDD1 ATVDD1 ATVDD1 ATVDD1
B8
ATVDD2 ATVDD2 ATVDD2 ATVDD2
D1
ATVDD3 ATVDD3 ATVDD3 ATVDD3
H2
ATVDD4 ATVDD4 ATVDD4 ATVDD4
R2
ATVDD5 ATVDD5 ATVDD5 ATVDD5
W1
ATVDD6 ATVDD6 ATVDD6 ATVDD6
AA9
ATVDD7 ATVDD7 ATVDD7 ATVDD7
AA15
ATVDD8 ATVDD8 ATVDD8 ATVDD8
A16
ATVSS1 ATVSS1 ATVSS1 ATVSS1