XRT91L34IV-F 查看數據表（PDF） - Exar Corporation
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XRT91L34IV-F Datasheet PDF : 38 Pages
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XRT91L34
QUAD CHANNEL MULTIRATE STS-12/3/1 AND STM-4/1/0 SONET/SDH CDR
PIN DESCRIPTIONS
HARDWARE CONTROL
REV. 1.0.1
NAME
RESET
LEVEL
LVTTL,
LVCMOS
TEST
LVTTL,
LVCMOS
DATA0RATE[1:0]
DATA1RATE[1:0]
DATA2RATE[1:0]
DATA3RATE[1:0]
LVTTL,
LVCMOS
LVTTL,
LVCMOS
LVTTL,
LVCMOS
LVTTL,
LVCMOS
TYPE
I
I
I
I
I
I
PIN
DESCRIPTION
46 Master Reset Input
Active "Low." When this pin is pulled "Low", the internal state
machines and registers are set to their default state.
"Low" = Master Hardware Reset
"High" = Normal Operation
This pin is provided with an internal pull-up.
45 Test Input
Active "High." When this pin is pulled "High", the 91L34 internal
state machines will enter into a factory test mode.
"Low" = Normal Operation
"High" = Factory Test Diagnostic Mode
NOTE: This pin should be pulled Low for normal operation.
This pin is provided with an internal pull-down.
115, 116
113, 114
Data Rate Selection
Selects SONET/SDH reception speed rate for each of the four
channels independently according to the logic below.
DATANRATE[1:0]
DATA RATE
50, 49
0
0
STS-1/STM-0
51.84 Mbps
48, 47
0
1
STS-3/STM-1
155.52 Mbps
1
0
STS-12/STM-4
622.08 Mbps
1
1
STS-12/STM-4
622.08 Mbps
NOTE: These pins have no function in Host Mode.
These pins are provided with internal pull-down.
6
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