hc9p5502b1-5 Intersil Corporation, hc9p5502b1-5 Datasheet - Page 6

• Manufacturer Part Number: hc9p5502b1-5
• Description: Slic Subscriber Line Interface Circuit
• Manufacturer: Intersil Corporation

Pin Descriptions
NOTE:
Functional Diagram
5. All grounds (AG, BG, and DG) must be applied before V
1, 8, 5, 22
28 PIN
PLCC
to run separate grounds off a line card, the AG must be applied first.
26
27
28
2-WIRE
LOOP
RING
TIP
DIP/SOIC
24 PIN
V
22
23
24
VOLTAGE
B
-
RING
RELAY
RING
PROTECTION
SECONDARY
POWER DENIAL
RING COMMAND
SYMBOL
(Continued)
4-6
150
AG
NC
TX
C
RING SYNC
4
150
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 nearby 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 F to 1.0 F, 20V.
This capacitor should be nonpolarized.
Analog Ground - To be connected to zero potential and serves as a reference for the transmit output (TX)
and receive input (RX) terminals.
Transmit Output, Four Wire Side - A low impedance analog output which represents the differential volt-
age 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 unbal-
anced and referenced to analog ground. Since the DC level of this output varies with loop current, capac-
itive coupling to the next stage is essential.
No Internal Connection.
150
RING
150
V
TIP
PD
B
RF
BG
RS
RC
RD
TF
-
B
+ or V
CURRENT
BATTERY
CONTROL
LIMITER
HC-5502B1
LOOP
FEED
RING
B
-. Failure to do so may result in premature failure of the part. If a user wishes
SLIC MICROCIRCUIT
RING
TRIP
DRIVERS
LINE
DESCRIPTION
MONITORING
+1
-1
LOOP
+
DIFF
AMP
OP
AMP
+
SHD
GKD
TX
OUT
+IN
-IN
RX
SWITCH HOOK
DETECTION
GROUND KEY
DETECTION
TRANSMIT
OUTPUT
RECEIVE
INPUT