
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
60
13.12 Analog Miscellaneous Signals
Pin Name
Type
Pin
No.
Function
RES
Analog
AP23
Reference resistor connection
. An off-chip 3.16k ±1%
resistor is connected between the positive resistor reference
pin RES and a Kelvin ground contact RESK. An on-chip
negative feedback path will force an internal 0.80V reference
(VREF) voltage onto RES , therefore forcing 252 μA of
current to flow through the resistor. This current is used to
bias the circuitry of the LVDS transmitter (TXLV).
RESK
Analog
AN24
Reference resistor connection
. An off-chip 3.16 k ±1%
resistor is connected between the positive resistor reference
pin RES and a Kelvin ground contact RESK. An on-chip
negative feedback path will force a 0.8 V VREF voltage onto
RES, therefore forcing 252 μA of current to flow through the
resistor.
For PMC Internal Use only.
This is an LVDS version of
DIVCLK/DIVCLKB that is transmitted off-chip for jitter
analysis. During normal operation, these signals are
not used.
OSC
OSCB
Analog
LVDS
Outputs
AJ32
AH30
ATB1
OIF_ATB1
ATB0
OIF_ATB0
Analog
AH31
V6
AG29
W5
For PMC Internal Use only.
Two analog test ports (ATB0,
ATB1) are provided for production testing only. If unused
these pins should be left FLOATING.
13.13 Line Side Analog Power and Ground
Pin Name
Pin Type
PIN
No.
Function
AVDHVREF
Analog
L7
The quiet TXLVREF analog power (AVDHVREF) is a +3.3 V
power supply for the quiet analog blocks. This pin is de-
coupled to VSS via an on-chip capacitor and is also de-
coupled externally to GROUND via a 0.1 μF ceramic de-
coupling capacitor for proper HF noise shunting.
13.14 System Side Analog Power and Ground
Pin Name
Pin Type
PIN
No.
Function
AVDL1
AK33
AVDL2
AN29
AP26
AVDL3
CSU
Analog
Power
AK32
AP24
The
quiet CSU analog power
(AVDL3-AVDL1) pins are +1.8
V power supplies for the quiet analog blocks. The noisy
analog power (AVDL4) pin is a +1.8 V power supply for the
noisy analog blocks.
AVDL4-AVDL1 are de-coupled from AVSL4-AVSL1 via on-
chip capacitors and are also de-coupled externally via the
following networks:
AVDL1+AVDL2: These balls can be connected together.
They are connected to the 1.8 V supply via a series 1