參數(shù)資料
型號(hào): HC5503PRCB
廠商: INTERSIL CORP
元件分類: 模擬傳輸電路
英文描述: Low Cost SLIC For Large Telecom Switches
中文描述: TELECOM-SLIC, PDSO24
封裝: PLASTIC, MS-013AD, SOIC-24
文件頁數(shù): 5/8頁
文件大?。?/td> 279K
代理商: HC5503PRCB
5
FN6101.0
Functional Diagram
15
PD
Power Denial - A low active TTL - Compatible logic input. When enabled, the ring feed voltage collapses to the tip feed
voltage (~4V). The DC feed is disabled, but the AC transmission is maintained. The switch hook detect (SHD) is not
necessarily valid, and the relay driver (RD) output is disabled.
16
RC
Ring Command - A low active TTL - Compatible logic input. When enabled, the relay driver (RD) output goes low on
the next high level of the ring sync (RS) input, as long as the SLIC is not in the power denial state (PD = 0) or the
subscriber is not already off- hook (SHD = 0).
17
NC
Leave disconnected.
18
OUT
The analog output of the spare operational amplifier.
19
-IN
The inverting analog input of the spare operational amplifier.
20
+IN
The non-inverting analog input of the spare operational amplifier.
21
RX
Receive Input, Four 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.
22
C
2
Capacitor #2 - An external capacitor to be connected between this terminal and analog ground. This capacitor is
required for the proper operation of ring trip detection. Recommended value 0.82
μ
F
±
10% 10V non-polarized.
23
AG
Analog Ground - To be connected to zero potential and serves as a reference for the transmit output (TX) and receive
input (RX) terminals.
24
TX
Transmit Output, Four Wire Side - A low impedance analog output proportional to the loop current. Transhybrid
balancing must be performed 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
coupling to the next stage is essential.
NC
No internal connection.
NOTE: 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)
24 PIN
DIP/SOIC
SYMBOL
DESCRIPTION
+
DIFF
AMP
+
OP
AMP
LOOP
MONITORING
RING
CONTROL
2-WIRE
LOOP
SECONDARY
PROTECTION
LINE
DRIVERS
TIP
RING
V
B
-
V
B
-
PD
POWER DENIAL
R
P
RING
R
S
RF
BG
TF
TIP
RD
RC
RS
RING SYNC
RING COMMAND
RING
TRIP
SHD
TX
TRANSMIT
OUTPUT
OUT
+IN
-IN
RX
RECEIVE
INPUT
SLIC MICROCIRCUIT
1/2 RING
RELAY
V
B
-
RING
VOLTAGE
RFS
1/2 RING
RELAY
R
S
SWITCH HOOK
DETECTION
-1
+1
BATTERY
FEED
LOOP
CURRENT
LIMITER
R
P
R
S
: 100
; 1/2W to 2W depending on surge requirements
R
P
: 50
; 1/2W to 2W depending on surge requirements
HC5503PRI
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