XRT94L31IB Exar Corporation, XRT94L31IB Datasheet - Page 110

• Manufacturer Part Number: XRT94L31IB
• Description: IC MAPPER DS3/E3/STS-1 504TBGA
• Manufacturer: Exar Corporation

Specifications of XRT94L31IB

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

XRT94L31
3-CHANNEL DS3/E3/STS-1 TO STS-3/STM-1 MAPPER IC
N
These timing requirements apply to both the Primary and the Redundant Receive STS-3/STM-1 PECL
Interface blocks.
The user should be aware of the following things about the Ingress DS3/E3/STS-1 Interface Timing.
F
STM-1 PECL I
1.
2.
3.
1.3.3
1.3.3.1
OTE
IGURE
S
YMBOL
:
t6
t7
If a given channel is configured to operate in the DS3/E3 Mode, then the DS3/E3 Framer block can be
configured to sample the DS3/E3/STS_1_DATA_IN and the DS3/E3/STS_1_NEG_IN input pins upon
either the rising or falling edge of DS3/E3/STS_1_CLOCK.
If a given channel is configured to operate in the STS-1/STM-0 Mode, then the Receive STS-1 TOH
Processor block will be operating in the Single-Rail Mode (e.g., the Receive STS-1 TOH Processor block
will ONLY sample the DS3/E3/STS_1_DATA_IN input signal.
STS_1_NEG_IN input signal.
Further, if a given channel is configured to operate in the STS-1/STM-0 Mode, then the Receive STS-1
TOH Processor block can be configured to sample the DS3/E3/STS_1_DATA_IN input signal, upon
either the rising or falling edge of DS3/E3/STS_1_CLOCK_IN.
Table 10
15. A
DS3/E3/STS-1 LIU INTERFACE TIMING INFORMATION
RxL_CLKL_p
RxL_CLKL_n
RxL_Data_p
RxL_Data_n
RxL_DATA to rising edge of RxL_CLKL set-up time requirements
Rising edge of RxL_CLKL to RxL_DATA hold time requirements
N
Ingress DS3/E3/STS-1 Interface Timing
T
NTERFACE
I
ABLE
presents information on the Timing parameters for the Receive STS-3/STM-1 PECL Interface
LLUSTRATION OF THE
10: T
IMING
I
NFORMATION FOR THE
D
W
ESCRIPTION
AVEFORMS OF THE
t6
110
R
ECEIVE
S
IGNALS THAT ARE
STS-3/STM-1 PECL I
t7
It will not sample the DS3/E3/
200ps
200ps
I
M
NPUT VIA THE
IN
.
NTERFACE
T
R
YP
ECEIVE
.
STS-3/
REV. 1.0.1
M
AX
.