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參數(shù)資料
| 型號(hào)： | HC55171BIM |
| 廠商： | INTERSIL CORP |
| 元件分類： | 模擬傳輸電路 |
| 英文描述： | Low Cost 5 REN Ringing SLIC for ISDN Modem/TA and WL |
| 中文描述： | TELECOM-SLIC, PQCC28 |
| 封裝： | PLASTIC, LCC-28 |
| 文件頁(yè)數(shù)： | 5/11頁(yè) |
| 文件大?。?/td> | 87K |
| 代理商： | HC55171BIM |
67
The truth table for the internal logic of the HC55171B is
provided in the above table. This family of ringing SLICs can be
configured to support traditional unbalanced ringing and
through SLIC balanced ringing. The device operating states
used by through SLIC ringing applications are loop power
denial and normal feed. During loop power denial, the tip and
ring amplifiers are disabled (high impedance) and the DC volt-
age of each amplifier approaches ground. The SLIC will not
provide current to the subscriber loop during this mode and will
not detect loop closure. Voice transmission occurs during the
normal loop feed mode. During normal loop feed the SLIC is
completely operational and performs all transmission and
supervisory functions.
Power Dissipation
Careful thermal design is required to guarantee that the
maximum junction temperature of 150
o
C of the device is not
exceeded. The junction temperature of the SLIC can be
calculated using:
Where T
A
is maximum ambient temperature and
θ
JA
is
junction to air thermal resistance (and is package
dependent). The entire term in parentheses yields the SLIC
power dissipation. The power dissipation of the subscriber
loop does not contribute to device junction temperature and
is subtracted from the power dissipation term. Operating at
85
o
C, the maximum PLCC SLIC power dissipation is 1.18W.
Likewise, the maximum SOIC SLIC power dissipation is
0.92W.
R
R
R
V
RX
OUT 1
R/20
R/2
TIP
TA
R
2R
2R
R
90K
RING
SENSE 1
RA
4.5K
25K
25K
100K
100K
4.5K
90K
RF
25
17
12
+2V
TF
14
RF
15
16
26
3
OP AMP
V
RING
V
TX
GM
28
11
RF2
BIAS
NETWORK
AGND
V
CC
I
TSD
GK
RFC
SH
F0
F1
RS
ALM
RTD
SHD
TST
V
BAT
-IN 1
13
24
19
2
1
TF
BGND
22
27
4
5
6
9
20
21
7
8
10
R = 108k
R
R
100K
100K
90K
18
SENSE
RING
SENSE 2
RDO
+
-
+
-
THERM
LTD
SHD
RTD
FAULT
DET
+
-
+
-
+
-
+
-
REF
VB/2
V
REF
NU
I
LIMIT
RDI
RTI
HC55171B DEVICE TRUTH TABLE
F1
F0
STATE
0
0
Loop power Denial Active
0
1
Power Down Latch RESET, Power on
RESET
1
0
RD Active (unbalanced ringing)
1
1
Normal Loop feed
T
J
T
A
θ
JA
I
CC
V
CC
I
BAT
V
BAT
I
LOOP
(
)
2
R
LOOP
(
)
–
+
(
)
+
=
(EQ. 1)
HC55171B
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HC55171IB | 5 REN Ringing SLIC for ISDN Modem/TA and WLL |
| HC55171 | 5 REN Ringing SLIC for ISDN Modem/TA and WLL |
| HC55171CB | 5 REN Ringing SLIC for ISDN Modem/TA and WLL |
| HC55171CM | 5 REN Ringing SLIC for ISDN Modem/TA and WLL |
| HC55171IM | 5 REN Ringing SLIC for ISDN Modem/TA and WLL |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HC55171CB | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| HC55171CM | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| HC55171CM96 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| HC55171IB | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| HC55171IM | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:5 REN Ringing SLIC for ISDN Modem/TA and WLL |
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