參數(shù)資料
型號(hào)： XRT83SL30IV
廠商： EXAR CORP
元件分類： 數(shù)字傳輸電路
英文描述： SINGLE-CHANNEL T1/E1/J1 SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR
中文描述： DATACOM, PCM TRANSCEIVER, PQFP64
封裝： 10 X 10 MM, 1.40 MM HEIGHT, TQFP-64
文件頁(yè)數(shù)： 14/76頁(yè)
文件大?。?/td> 376K
代理商： XRT83SL30IV
XRT83SL30
SINGLE-CHANNEL T1/E1/J1 SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR
REV. P1.0.4
á
PRELIMINARY
11
REDUNDANCY SUPPORT
TERMINATIONS
S
IGNAL
N
AME
P
IN
#
T
YPE
D
ESCRIPTION
DMO
11
O
Driver Failure Monitor
This pin transitions "High" if a short circuit condition is detected in the trans-
mit driver, or no transmit output pulse is detected for more than 128 TCLK
cycles.
S
IGNAL
N
AME
P
IN
#
T
YPE
D
ESCRIPTION
GAUGE
49
I
Twisted Pair Cable Wire Gauge Select
In
Hardware Mode
, connect this pin "High" to select 26 Gauge wire. Connect this pin
“Low” to select 22 and 24 gauge wire.
N
OTE
:
Internally pulled “Low” with a 50k
resistor.
TRATIO
26
I
Transmitter Transformer Ratio Select
In
Hardware Mode
, in external termination mode (TXTSEL = “0”), setting this pin "High"
selects a transformer ratio of 1:2 for the transmitter. A "Low" on this pin sets the transmit-
ter transformer ratio to 1:2.45. In the internal termination mode the transmitter trans-
former ratio is permanently set to 1:2 and the state of this pin is ignored.
N
OTE
:
Internally pulled "Low" with a 50k
resistor.
RXTSEL
44
I
Receiver Termination Select
In
Hardware Mode
when this pin is “Low” the receive line termination is determined only
by the external resistor. When “High”, the receive termination is realized by internal
resistors or the combination of internal and external resistors according to RXRES[1:0].
These conditions are described in the following table:
In Host Mode bit 7 in Control Register 1 (01h) determines if the if the receiver termina-
tion is external or internal. The function of RXTSEL can be transferred to the harware pin
by setting TERCNTL bit (bit 4)
N
OTE
:
This pin is internally pulled "Low" with a 50k
resistor.
TXTSEL
45
I
Transmit Termination Select
In
Hardware Mode
when this pin is “Low” the transmit line termination is determined
only by external resistor. When “High”, the transmit termination is realized only by an
internal resistor. These conditions are summarized in the following table:
N
OTE
:
This pin is internally pulled "Low" with a 50k
resistor.
RXTSEL
RX Termination
0
1
External
Internal
TXTSEL
TX Termination
0
1
External
Internal
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