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參數(shù)資料
| 型號(hào)： | HC-5504B1 |
| 廠商： | Intersil Corporation |
| 英文描述： | ITU Low Cost, PABX SLIC With 40mA Loop Feed |
| 中文描述： | 國(guó)際電聯(lián)低成本，分機(jī)與四十○毫安循環(huán)飼料用戶接口 |
| 文件頁(yè)數(shù)： | 6/9頁(yè) |
| 文件大?。?/td> | 87K |
| 代理商： | HC-5504B1 |
56
Functional Diagram
24
20
+IN
The non-inverting analog input of the spare operational amplifier.
25
21
RX
Receive Input, 4-Wire Side - A high impedance analog input which is internally biased. Capacitive coupling
to this input is required. AC signals appearing at this input differentially drive the Tip feed and Ring feed
terminals, which in turn drive tip and ring through 300
of feed resistance on each side of the line.
26
22
C
4
Capacitor #4 - An external capacitor to be connected between this terminal and analog ground. This ca-
pacitor prevents false ground key indication and false ring trip detection from occurring when longitudinal
currents are induced onto the subscriber loop from near by power lines and other noise sources. This ca-
pacitor is also required for the proper operation of ring trip detection. Typical value is 0.5
μ
F, to 1.0
μ
F, 20V.
This capacitor should be nonpolarized.
27
23
AG
(Note 5)
Analog Ground - To be connected to zero potential and serves as a reference for the transmit output (TX)
and receive input (RX) terminals.
28
24
TX
Transmit Output, 4-Wire Side - A low impedance analog output which represents the differential voltage
across Tip and Ring. Transhybrid balancing must be performed (using the SLIC microcircuit’s spare op
amp) beyond this output to completely implement two to four wire conversion. This output is unbalanced
and referenced to analog ground. Since the DC level of this output varies with loop current, capacitive cou-
pling to the next stage is essential.
1, 8, 15, 22
NC
No internal connection.
NOTE:
5. All grounds (AG, BG, and DG) must be applied before V
B
+ or V
B
-. Failure to do so may result in premature failure of the part. If a user wishes
to run separate grounds off a line card, the AG must be applied first.
Pin Descriptions
(Continued)
28 PIN
PLCC
24 PIN
DIP/SOIC
SYMBOL
DESCRIPTION
LOOP
MONITORING
RING
CONTROL
2 WIRE
LOOP
SECONDARY
PROTECTION
LINE
DRIVERS
TIP
RING
V
B
-
V
B
-
PD
POWER DENIAL
150
RING
150
RF
BG
150
TF
TIP
RD
RC
RS
RING SYNC
RING COMMAND
RING
TRIP
SHD
GKD
OUT
RX
RECEIVE
INPUT
SLIC MICROCIRCUIT
1/2 RING
RELAY
V
B
-
RING
VOLTAGE
RFS
1/2 RING
RELAY
150
SWITCH HOOK
DETECTION
GROUND KEY
DETECTION
BATTERY
FEED
LOOP
CURRENT
LIMITER
DIFF
AMP
TX
TRANSMIT
OUTPUT
+
-
+1
-1
OP
AMP
+IN
-IN
+
-
HC-5504B
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| HC-5504B1_03 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:ITU Low Cost, PABX SLIC With 40mA Loop Feed |
| HC5504B3 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecommunication IC |
| HC5504B4P | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecommunication IC |
| HC-5504DLC | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:SLIC Subscriber Line Interface Circuit |
| HC5504DLC3 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecommunication IC |
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