HC5503PRC
Electrical Specifications Unless Otherwise Specified, V - = -48V, V + = 5V, AG = BG = DG = 0V, R = 50Ω, R = 100Ω, Typical
B
B
P
S
o
Parameters. T = 25 C. Min-Max Parameters are Over Operating Temperature Range (Continued)
A
PARAMETER
UNCOMMITTED OP AMP SPECIFICATIONS
Input Offset Voltage
CONDITIONS
MIN
TYP
MAX
UNITS
-
-
-
-
-
-
-
±5
±10
20
1
-
-
-
-
-
-
-
mV
nA
Input Offset Current
Input Bias Current
nA
Differential Input Resistance
Output Voltage Swing
Output Resistance
(Note 4)
= 10K, V + = 5V
MΩ
R
±3
10
1
V
PEAK
L
B
A
= 1 (Note 4)
Ω
VCL
Small Signal GBW
(Note 4)
MHz
NOTES:
3. I
= Longitudinal Current
LONG
4. These parameters are controlled by design or process parameters and are not directly tested. These parameters are characterized upon initial
design release, upon design changes which would affect these characteristics, and at intervals to assure product quality and specification
compliance.
Pin Descriptions
28 PIN
PLCC
24 PIN
DIP/SOIC SYMBOL
DESCRIPTION
2
3
4
1
2
3
TIP
RING
RFS
An analog input connected to the TIP (more positive) side of the subscriber loop through a sense resistor
(R ) and a ring relay contact. Functions with the Ring terminal to receive voice signals from the telephone
S
and for loop monitoring purposes.
An analog input connected to the RING (more negative) side of the subscriber loop through a sense resistor
(R ) and a ring relay contact. Functions with the Tip terminal to receive voice signals from the telephone and
S
for loop monitoring purposes.
Senses ring side of loop for ground key and ring trip detection. During ringing, the ring signal is inserted into
the line at this node and RF is isolated from RFS via a relay.
5
6
4
5
V +
Positive Voltage Source - Most positive supply. V + is typically.
B
B
C
Capacitor #1 - An external capacitor to be connected between this terminal and analog ground. Required
1
for proper operation of the loop current limiting function, and for filtering V -. Typical value is 0.3µF, 30V.
B
7
9
6
7
DG
RS
Digital Ground - To be connected to zero potential and serves as a reference for all digital inputs and outputs
on the SLIC microcircuit.
Ring Synchronization Input - A TTL - compatible clock input. The clock should be arranged such that a
positive pulse transition occurs on the zero crossing of the ring voltage source, as it appears at the RFS
terminal. For Tip side injected systems, the RS pulse should occur on the negative going zero crossing and
for Ring injected systems, on the positive going zero crossing. This ensures that the ring relay activates and
deactivates when the instantaneous ring voltage is near zero. If synchronization is not required, the pin
should be tied to 5V.
10
11
8
9
RD
TF
Relay Driver - A low active open collector logic output. When enabled, the external ring relay is energized.
Tip Feed - A low impedance analog output connected to the TIP terminal through a sense resistor (R ).
S
Functions with the RF terminal to provide loop current, feed voice signals to the telephone set, and sink
longitudinal current.
12
10
RF
Ring Feed - A low impedance analog output connected to the RING terminal through a sense resistor (R ).
S
Functions with the TF terminal to provide loop current, feed voice signals to the telephone set, and sink
longitudinal current.
13
14
16
17
11
12
13
14
V -
B
Negative Voltage Source - Most negative supply. V - is typically -48V with an operational range of -42V to
B
-58V. Frequently referred to as “battery”.
BG
SHD
NC
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 the switch hook threshold.
Used during production test. Leave disconnected.
4
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