參數(shù)資料
型號(hào)： XRT83SL34
廠商： Exar Corporation
英文描述： QUAD T1/E1/J1 SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR
中文描述： 上海四的T1/E1/J1收發(fā)器時(shí)鐘恢復(fù)和抖動(dòng)衰減器
文件頁(yè)數(shù)： 26/80頁(yè)
文件大?。?/td> 856K
代理商： XRT83SL34
XRT83SL34
QUAD T1/E1/J1 SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR
REV. P1.0.8
PRELIMINARY
29
TRANSMITTER (CHANNELS 0 - 3)
TRANSMIT TERMINATION MODE
In Hardware mode, TXTSEL (Pin 84) can be tied “High” to select internal termination mode for all transmit
channels or tied “Low” for external termination. Individual channel control can be done only in Host mode. In
Host mode, bit 6 in the appropriate register for a given channel is set “High” to select the internal termination
mode for that specific transmit channel, see Table 20, “Microprocessor Register #1, Bit Description,” on
For internal termination, the transformer turns ratio is always 1:2. In internal mode, no external resistors are
used. An external capacitor of 0.68
F is used for proper operation of the internal termination circuitry, see
EXTERNAL TRANSMIT TERMINATION MODE
By default the XRT83SL34 is set for external termination mode at power up or at Hardware reset.
When external transmit termination mode is selected, the internal termination circuitry is disabled. The value of
the external resistors is chosen for a specific application according to the turns ratio selected by TRATIO (Pin
127) in Hardware mode or bit 0 in the appropriate register for a specific channel in Host mode, see Table 10
FIGURE 13. SIMPLIFIED DIAGRAM FOR E1 IN EXTERNAL TERMINATION MODE (RXTSEL= 0)
TABLE 8: TRANSMIT TERMINATION CONTROL
TXTSEL
TX TERMINATION
TX TRANSFORMER RATIO
0
EXTERNAL
1:2.45
1
INTERNAL
1:2
TABLE 9: TERMINATION SELECT CONTROL
TERSEL1
TERSEL0
TERMINATION
00
100
01
110
10
75
11
120
9.1
9.1
TTIP
TR IN G
RT IP
RRING
75
X R T8 3 S L3 4 LIU
75
75
1 :2.45
1:1
相關(guān)PDF資料
PDF描述
XS2F-A422-90-A 4 CONTACT(S), POLYBUTYLENE TEREPHTHALATE, FEMALE, CIRCULAR CONNECTOR, CLAMP, SOCKET
XS2F-A422-A90-A 4 CONTACT(S), POLYBUTYLENE TEREPHTHALATE, FEMALE, CIRCULAR CONNECTOR, CLAMP, SOCKET
XS2F-A422-AB0-A 4 CONTACT(S), POLYBUTYLENE TEREPHTHALATE, FEMALE, CIRCULAR CONNECTOR, CLAMP, SOCKET
XS2F-A422-AC0-A 4 CONTACT(S), POLYBUTYLENE TEREPHTHALATE, FEMALE, CIRCULAR CONNECTOR, CLAMP, SOCKET
XS2F-A422-AD0-A 4 CONTACT(S), POLYBUTYLENE TEREPHTHALATE, FEMALE, CIRCULAR CONNECTOR, CLAMP, SOCKET
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