XRT94L33IB-L Exar Corporation, XRT94L33IB-L Datasheet - Page 68

• Manufacturer Part Number: XRT94L33IB-L
• Description: IC MAPPER DS3/E3/STS-1 504TBGA
• Manufacturer: Exar Corporation

Specifications of XRT94L33IB-L

• Applications: Network Switches
• Interface: Bus
• Voltage - Supply: 3.14 V ~ 3.47 V
• Package / Case: 504-LBGA
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

XRT94L31
3-CHANNEL DS3/E3/STS-1 TO STS-3/STM-1 MAPPER IC
PIN DESCRIPTION OF THE XRT94L31 (REV. B)
PIN #
AE13
AD13
AB27
AA26
D15
D22
E20
E15
Y26
V24
V25
RxUPRTY/RxPPRTY
RxOHFRAME_0
RxOHFRAME_1
RxOHFRAME_2
SIGNAL NAME
RxOHCLK_0
RxOHCLK_1
RxOHCLK_2
RxMOD_0
RxPDVAL
RxPERR
RxPEOP
I/O
O
O
O
O
O
O
O
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
TYPE
Receive Overhead Data Output Interface - clock
This output pin functions as the Receive Overhead Clock output for the
receive system side interface when the XRT94L31 is configured to oper-
ate in DS3/E3 mode, however, it functions as the Receive STS-1 Over-
head Clock output when the device is configured to operate in the STS-1
mode.
When configured to operate in DS3/E3 mode:
The channel will output the overhead bits (within the incoming DS3 or E3
frames) via the RxOH_n output pin, upon the falling edge of this clock
signal.
As a consequence, the user's local terminal equipment should use the
rising edge of this clock signal to sample the data on both the RxOH and
RxOHFrame output pins.
N
When configured to operate in STS-1 mode:
These output pins, along with RxOH_n, RxOHFrame_n, and
RxOHEnable_n function as the Receive STS-1 TOH and POH Output
Port.These output pins function as the Clock Output signals for the
Receive STS-1 TOH and POH Output Port. The RxOH_n,
RxSTS1Frame_n and RxOHEnable_n output pins are updated upon the
falling edge of this clock signal.
Receive Overhead Data Interface - Framing Pulse indicator
This output pin functions as the Receive Overhead Clock output for the
receive system side interface when the XRT94L31 is configured to oper-
ate in DS3/E3 mode, however, it functions as the Receive STS-1 Over-
head Clock output when the device is configured to operate in the STS-1
mode.
When configured to operate in DS3/E3 mode:
This output pin pulses "High" whenever the Receive Overhead Data
Output Interface block outputs the first overhead bit of a new DS3 or E3
frame.
When configured to operate in STS-1 mode:
These output pins, along with RxOH_n, RxOHEnable_n and RxOHClk_n
function as the Receive STS-1 TOH and POH Output Port.
These output pins will pulse "High" coincident with either of the following
events.
When the very first TOH byte (A1), of a given STS-1 frame, is being out-
put via the corresponding RxOH_n output pin.
When the very first POH byte (J1), of a given STS-1 frame, is being out-
put via the corresponding RxOH_n output pin.
The external circuitry can determine whether or not these output pins are
pulsing "High" for the first TOH or POH byte by checking the state of the
corresponding RxOHEnable_n output pin.
For mapper applications, Please let this pin float.
For mapper applications, Please let this pin float.
For mapper applications, Please let this pin float.
For mapper applications, Please let this pin float.
For mapper applications, Please let this pin float.
OTE
: This clock signal is always active.
68
DESCRIPTION
REV. 1.0.1