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參數(shù)資料
| 型號(hào)： | L8560 |
| 英文描述： | Low-Power SLIC with Ringing |
| 中文描述： | 低功耗振鈴用戶接口 |
| 文件頁(yè)數(shù)： | 8/46頁(yè) |
| 文件大?。?/td> | 842K |
| 代理商： | L8560 |
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Data Sheet
April 2000
L8560 Low-Power SLIC with Ringing
8
Lucent Technologies Inc.
Pin Information
(continued)
Table 2. Pin Descriptions
(continued)
32-Pin 44-Pin
—
26
Symbol
NC
B2
Type
—
I
Description
24
25
No Connection.
May be used as a tie point.
State Control Input.
B0, B1, B2, and BR determine the state of the SLIC.
See Table 3. Pin B2 has a 40 k
pull-up.
State Control Input.
B0, B1, B2, and BR determine the state of the SLIC.
See Table 3. Pin B1 has a 40 k
pull-up.
State Control Input.
B0, B1, B2, and BR determine the state of the SLIC.
See Table 3. Pin B0 has a 40 k
pull-up.
State Control Input.
B0, B1, B2, and BR determine the state of the SLIC.
See Table 3. Pin BR has a 40 k
pull-up.
No Connection.
May be used as a tie point.
No Connection.
May
not
be used as a tie point.
No Connection.
May be used as a tie point.
Transmit Gain.
Connect a 4.32 k
resistor from this pin to VTX.
The voltage at this pin is directly proportional to the differential tip/ring current.
ac/dc Separation.
Connect a 0.1
μ
F capacitor from this pin to VTX
.
Loop Detector Output/Ring Trip Detector Output.
This output is a wired-
OR of the NLC/NRDET outputs. When low, this logic output indicates that an
off-hook condition exists or that ringing has been tripped.
–5 V Power Supply L8560C.
No Connection L8560A/D/F.
May be used as a tie point.
No Connection.
May be used as a tie point.
ac Output Voltage.
This output is a voltage that is directly proportional to the
differential ac tip/ring current.
Receive ac Signal Input (Noninverting).
This high-impedance input con-
trols the ac differential voltage on tip and ring.
Receive ac Signal Input (Inverting).
This high-impedance input controls the
ac differential voltage on tip and ring.
No Connection.
May be used as a tie point.
Polarity Reversal Slowdown.
Connect a capacitor to ground.
Polarity Reversal Slowdown.
Connect a capacitor to ground.
Loop Closure Threshold Input.
Connect a resistor to DCOUT to set off-
hook threshold.
dc Resistance.
Short to analog ground for dc feed resistance of 55
. The dc
feed resistance can be increased to a nominal 760
by shorting DCR to
DCOUT. Intermediate values can be set by a simple resistor divider from
DCOUT to ground with the trip at DCR (44-pin PLCC only).
27
26
B1
I
28
27
B0
I
29
28
BR
I
—
—
—
30
31
32
1
29
30
31
NC
—
—
—
—
O
—
O
NC-NTP
NC
TG
VTX
TXI
NSTAT
32
33
34
35
2
2
—
3
—
—
36
37
V
EE
NC
NC
VITR
—
—
—
O
4
38
RCVP
I
5
39
RCVN
I
—
6
40
41
42
43
NC
FB2
FB1
LCTH
—
—
—
I
7
8
—
44
DCR
I
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