PMC-Sierra, Inc.
PM5356
S/UNI-622-MAX
DATASHEET
S/UNI-622-MAX
PMC-1980589
ISSUE 5
SATURN USER NETWORK INTERFACE (622-MAX)
Notes on Pin Description:
1. All S/UNI-622-MAX inputs and bi-directional signals present minimum capacitive loading and
operate at TTL logic levels except the inputs marked as Analog or differential pseudo-ECL
(PECL).
2. The RDAT[15:0], RCA, RCLK, RFPO, RVAL, TCA, TCLK, TFPO, POUT[7:0], FPOUT and
OOF outputs have a 8mA drive capability. The TDO and INTB outputs have a 2mA drive
capability. All other digital outputs and bi-directional signals have 4mA drive capability.
3. The system interface inputs RFCLK, RENB, TFCLK, TENB, TDAT[15:0], and TPRTY do not
use the ESD bias voltages (VBIAS and PBIAS pins) and are 3.3V tolerate only. All other
digital inputs (excluding inputs marked Analog), may operate with 5V signalling with
appropriate ESD biasing.
4. The differential pseudo-ECL inputs and outputs should be terminated in a passive network
and interface at PECL levels as described in the Operations section.
5. It is mandatory that every digital ground pin (VSS) be connected to the printed circuit board
ground plane to ensure reliable device operation.
6. It is mandatory that every digital power pin (VDD) 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 decouple these pins. Please refer
to the Operation section and the S/UNI-622-MAX reference design (PMC-981070) for more
information.
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.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
39
PMC [ PMC-SIERRA, INC ]
