
PM5317 SPECTRA-9953 Telecom Standard Product Data Sheet
Release
Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2000741, Issue 5
84
Pin Name
Pin Type
PIN
No.
Function
VSS
W18
Y2
Y3
Y8
Y9
Y14
Y15
Y17
Y18
Y20
Y21
Y26
Y27
Y32
Y33
Notes on Pin Description
1. All SPECTRA-9953 inputs and bidirectionals present minimum capacitive loading and operate at TTL
logic levels except the inputs (as marked) that operate at LVDS logic levels.
2. The SPECTRA-9953 digital outputs and bidirectionals that have 4 mA drive capability are: RLD[4:1],
RLDCLK[4:1], RSLD[4:1], RSLDCLK[4:1], TSLDCLK[4:1], TLDCLK[4:1], PHASE_INIT[4:1],
LINE_OOL[4:1], RSALM[4:1], RALM[4:1], RRCPCLK[4:1], RRCPFP[4:1], RRCPDAT[4:1], SYS_OOL,
INTB, TDO, and D[15:0].
3. The SPECTRA-9953 digital outputs and bidirectionals that have 5 mA drive capability are: B3E[4:1],
RTOH[4:1], ROHFP[4:1], ROHCLK[4:1], TOHCLK[4:1], TOHFP[4:1], TXFPO[4:1], PGMRCLK,
PGMTCLK, and DFPO.
4. Inputs ALE, RSTB, TMS, TDI, and TRSTB have internal pull-up resistors.
5. It is mandatory that every digital ground pin (VSS) be connected to the printed circuit board ground
plane to ensure reliable device operation. Refer to the Power Sequencing description in the
Operations section.
6. It is mandatory that every digital power pin (VDDO & VDDI) be connected to the printed circuit board
power plane to ensure reliable device operation.
7. All analog power and ground pins can be sensitive to noise. They must be isolated from the digital
power and ground. Care must be taken to correctly de-couple these pins. Please refer to the
Operations section
.
8. Due to ESD protection structures in the pads it is necessary to exercise caution when powering a
device up or down. ESD protection devices behave as diodes between power supply pins and from
I/O pins to power supply pins. Under extreme conditions it is possible to damage these ESD
protection devices or trigger latch up. Please adhere to the recommended power supply sequencing
as described in the Operation section of this document.
9. Do not exceed 100 mA of current on any pin during the power-up or power-down sequence. Refer to
the Power Sequencing description in the Operations section.
10. Before any input activity occurs, ensure that the device power supplies are within their nominal
voltage range.