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S/UNI-QUAD
PMC-Sierra, Inc.
PM5349 S/UNI-QUAD
DATASHEET
PMC-971239 ISSUE 6 SATURN USER NETWORK INTERFACE (155-QUAD)
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
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Power supply filtering recommendations are provided in the
OPERATION section of this document.
6. 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 blow 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.
7. If it is intended to substitute a S/UNI-QUAD in a S/UNI-TETRA socket,
special attention must be given to the NC pins. The requirement is that no
S/UNI-QUAD input pin is left floating when used in a S/UNI-QUAD socket.
Please refer to the relevant PMC-Sierra, Inc. application note.
8. Some device pins can be made 5V tolerant by connecting the BIAS pins to a
5V power supply, while some other pins are 3.3V only. In summary, the
system interface is 3.3V only while the microprocessor interface, SONET and
line interfaces can be 5V tolerant.
3.3V only I/O’s:
RDAT[15:0], RSOC, RPRTY, RENB,
TDAT[15:0], TSOC, TPRTY, TENB,
RCA, DRCA4-1, TCA, DTCA4-1,
RADR[5:0], TADR[5:0], PHY_OEN
5V tolerant I/O’s:
REFCLK, RXD
RCLK4-1, RFPO4-1, RALRM4-1,
TCLK, TFPO, TFPI,
D[7:0], A[10:0], WRB, RDB, CSB, RSTB, INTB, ALE,
TRSTB, TCK, TMS, TDI, TDO,