XRT94L33IB-L Exar Corporation, XRT94L33IB-L Datasheet - Page 19

• 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

xr
3-CHANNEL DS3/E3/STS-1 TO STS-3/STM-1 MAPPER IC DATA SHEET
AD1
AA3
RxD_C1J1/
RxAPSVal
RxD_PL
I/O
I
I
CMOS
TTL/
TTL
TTL
Receive STS-3/STM-1 Telecom Bus Interface – Payload Data
Indicator Output Signal:
This input pin indicates whether or not the Receive STS-3/STM-1
Telecom Bus Interface is currently receiving Transport Overhead
bytes or “non-Transport Overhead bytes (e.g., STS-1 SPE, STS-
3c SPE,VC-3 or VC-4 data) via the “RXD_D[7:0]” input pins.
This input pin should be pulled “low” for the duration that “STS-
3/STM-1 Receive STS-3/STM-1 Telecom Bus Interface is
receiving a Transport Overhead byte via the “RXD_D[7:0]” input
pins.
Conversely, this input pin should be pulled “high” for the duration
that the Receive STS-3/STM-1 Telecom Interface Bus is
receiving something other than a Transport Overhead byte via
the “RXD_D[7:0]” input pins.
Note:
Receive STS-3/STM-1 Telecom Bus Interface - C1/J1 Byte
Phase Indicator Input Signal/Receive APS Valid Indicator
Input/Output signal:
The exact function of this input pin depends upon (1) whether the
STS-3/STM-1 Telecom Bus Interface has been enabled or not,
and (2) whether the Payload APS Bus has been enabled or not.
If the STS-3/STM-1 Telecom Bus Interface has been enabled
– RxD_C1J1:
This input pin should be pulsed “high” during both of the
following conditions.
NOTE: This input pin should be pulled “low” during all other
Receive
Input/Output Signal:
This pin can only be configured to operate in this role if the
XRT94L33 has been configured to operate in either the “ATM
UNI” or “PPP over STS-3c” Mode.
19
a.
b.
Coincident to whenever the C1/J0 byte is being applied
to the Receive STS-3/STM-1 Telecom Bus – Data Input
pins (RXD_D[7:0]).
b. Coincident to whenever the J1 byte is being applied
to the Receive STS-3/STM-1 Telecom Bus – Data Input
pins (RXD_D[7:0]) input.
3/STM-1 Telecom Bus is NOT enabled.
times.
The user should connect this pin to GND if the STS-
Payload
APS
Bus
Interface
–
XRT94L33
Data
Rev.1.2.0.
Valid