HC9P5504B-5Z Intersil, HC9P5504B-5Z Datasheet - Page 6

• Manufacturer Part Number: HC9P5504B-5Z
• Description: IC,SLIC,2-4 CONVERSION,BIPOLAR,SOP,24PIN,PLASTIC
• Manufacturer: Intersil

Specifications of HC9P5504B-5Z

• Rohs Compliant: YES

Pin Descriptions
Functional Diagram
24 PIN
SOIC
21
22
23
24
2 WIRE
VOLTAGE
LOOP
RING
TIP
RING
V
SYMBOL
B
(Note 5)
-
V
1/2 RING
AG
NC
RX
TX
B
C
RELAY
-
4
PROTECTION
SECONDARY
1/2 RING
RELAY
RING COMMAND
POWER DENIAL
(Continued)
150Ω
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 300Ω of feed resistance on each side of the line.
Capacitor #4 - An external capacitor to be connected between this terminal and analog ground. This capacitor
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 capacitor is also required
for the proper operation of ring trip detection. Typical value is 0.5µF, to 1.0µF, 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, 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 coupling to the next stage is essential.
No internal connection.
150Ω
RING SYNC
6
RFS
150Ω
150Ω
RING
TIP
PD
V
RC
RD
BG
RS
RF
TF
B
-
SLIC MICROCIRCUIT
HC-5504B
CURRENT
BATTERY
CONTROL
LIMITER
LOOP
FEED
RING
RING
TRIP
DESCRIPTION
DRIVERS
LINE
+1
-1
MONITORING
LOOP
AMP
OP
+
-
+
-
DIFF
AMP
SHD
OUT
+IN
-IN
GKD
RX
TX
SWITCH HOOK
DETECTION
GROUND KEY
DETECTION
RECEIVE
INPUT
TRANSMIT
OUTPUT