
172
Agere Systems Inc.
Data Sheet
May 2001
and Packet Payload Engine
Ambassador T8110 PCI-Based H.100/H.110 Switch
15 Electrical Characteristics
(continued)
15.10 PC Board PBGA Considerations
The T8110 is a 272-ball plastic ball grid array package. The 16 centrally located thermal balls should be connected
to board ground. While there are no special printed-circuit board requirements for the T8110, there are specifica-
tion requirements for PC board layout that must be adhered to. For instance, per the ECTF H.110 specification, all
CT bus data signals must not exceed 4 inches in length from connector to I/O cell and all CT bus clock signals
must not exceed 2 inches in length from connector to I/O cell. We advise the customer to become familiar with
applicable specifications for any PC board requirements.
15.11 Unused Pins
If the PCI interface is not used, these signals should be pulled up/down to their inactive state. Multiple pins may
share a common resistor. Signals with pull-up/down resistors may be left unconnected if unused. Unused 8 mA
3-state signals may be left unconnected. If XTAL1_IN and/or XTAL2_IN are being driven from an oscillator, then
XTAL1_OUT and/or XTAL2_OUT must be left unconnected. If XTAL2 is not used, XTAL2_IN should be pulled-up
or tied directly to V
DD
and XTAL2_OUT should be left unconnected. If VPRECHARGE is unused, this signal may be
left unconnected. All signals listed as
no connect
(A20, D16, D20, E17, F20, and G17) in Table 9 must be left
unconnected.
15.12 T8110 Evaluation Boards
Two development kits are available for the T8110, one for PCI and one for
CompactPCI
. Each kit contains an eval-
uation board, software, documentation and unrestricted access to the T8110 help desk.
The
CompactPCI
evalua-
tion board is Full Hot Swap; it includes the T8110 chip, a PCI transparent bridge, a dual T1/E1 line interface, dual
codec, and dual SLIC. The PCI evaluation board is a full-length PCI board and is comparably featured (no hot
swap). The CompactPCIevaluation board is designed to use the PCI interface only, and the PCI board has an
option to use the PCI interface
or
the microprocessor interface. Software includes full source code, including rights
to re-use. Documentation CD includes evaluation board schematics (ORCAD and .pdf formats) evaluation board
bill of material (BOM), data sheets, and advisories. Refer to website www.agere.com/ambassador for additional
information.
15.13 T8110 Ordering Information
Table 129. T8110 Ordering Information
Device Part Number
Package
Comcode
T-8110---BAL-DB
272-Ball PBGA
108560269