hc5503c Intersil Corporation, hc5503c Datasheet - Page 4

• Manufacturer Part Number: hc5503c
• Description: Unbalanced Pbx/key System Slic, Subscriber Line Interface Circuit
• Manufacturer: Intersil Corporation

Pin Descriptions
NOTE: All grounds (AGND, BGND, and DGND) must be applied before V
a user wishes to run separate grounds off a line card, the AG must be applied first.
PDIP
10
11
12
13
14
15
16
17
18
19
20
21
22
1
2
3
4
5
6
7
8
9
SOIC
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
1
2
3
4
5
6
7
8
9
SYMBOL
VB(INT)
DGND
BGND
AGND
RING
V
SHD
V
N/C
N/C
N/C
N/C
N/C
N/C
N/C
TIP
RS
RX
TX
C
TF
T1
T2
T3
BAT
CC
1
52
An analog input connected to the TIP (more positive) side of the subscriber loop through a 150 feed resistor.
Functions with the Ring terminal to receive voice signals from the telephone and for loop monitoring
purposes.
An analog input connected to the RING (more negative) side of the subscriber loop through a 150
resistor. Functions with the Tip terminal to receive voice signals from the telephone and for loop monitoring
purposes.
Positive Voltage Source - Most positive supply. V
No connect. For proper operation this pin should be left floating.
Capacitor - An external capacitor to be connected between this terminal and analog ground. Required for
proper operation of the voice band hybrid. Typical value is 0.3 F, 30V.
Digital Ground - To be connected to zero potential and serves as a reference for all digital inputs and outputs
on the SLIC microcircuit.
No connect. For proper operation this pin should be left floating.
Tip Feed - A low impedance analog output connected to the TIP terminal through a 150
Provides voice signals to the telephone set and sink longitudinal current.
A low impedance analog output connected to the Ring terminal through a 150
provides a loop current path to battery.
Negative Voltage Source - Most negative supply. V
referred to as “battery”.
Battery Ground - To be connected to zero potential. All loop current and some quiescent current flows into
this ground terminal.
Switch Hook Detection - A low active LS TTL - compatible logic output. This output is enabled for loop
currents exceeding 10mA and disabled for loop currents less than 5mA.
No connect. For proper operation this pin should be left floating.
No connect. For proper operation this pin should be left floating.
No connect. For proper operation this pin should be left floating.
No connect. For proper operation this pin should be left floating.
Used during production testing. For proper operation this pin should be connected to pin T2.
Used during production testing. For proper operation this pin should be connected to pin T1.
Used during production testing. For proper operation this pin should be connected to Analog Ground pin
AGND.
Receive Input - 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.
No connect. For proper operation this pin should be left floating.
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 - A low impedance analog output which represents the differential voltage across Tip and
Ring. 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.
This pin should be tied to 5V.
HC5503C
CC
or V
BAT
DESCRIPTION
. Failure to do so may result in premature failure of the part. If
CC
BAT
is typically 5V.
has an operational range of -24V to -58V. Frequently
feed resistor. This pin
feed resistor.
feed