HC5503PRC_04 Datasheet, PDF (5/11 Pages) Intersil Corporation – Low Cost SLIC For Large Telecom Switches

HC5503PRC
Electrical Specifications
PARAMETER
Unless Otherwise Specified, V_B- = -48V, V_B+ = 5V, AG = BG = DG = 0V, R_P = 50Ω, R_S = 100Ω, Typical
Parameters. T_A = 25°C. Min-Max Parameters are Over Operating Temperature Range (Continued)
CONDITIONS
MIN
TYP MAX UNITS
UNCOMMITTED OP AMP SPECIFICATIONS
Input Offset Voltage
-
±5
-
mV
Input Offset Current
-
±10
-
nA
Input Bias Current
-
20
-
nA
Differential Input Resistance
(Note 4)
-
1
-
MΩ
Output Voltage Swing
Output Resistance
Small Signal GBW
R_L = 10K, V_B+ = 5V
A_VCL = 1 (Note 4)
(Note 4)
-
±3
-
V_PEAK
-
10
-
Ω
-
1
-
MHz
NOTES:
4. I_LONG = Longitudinal Current.
5. 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
24 PIN
DIP/SOIC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
7x7
QFN
28
31
32
1
3
4
5
6
7, 8
9, 10
11
12
13
14,19
SYMBOL
DESCRIPTION
TIP An analog input connected to the TIP (more positive) side of the subscriber loop through a sense resistor
(R_S) and a ring relay contact. Functions with the Ring terminal to receive voice signals from the telephone
and for loop monitoring purposes.
RING
An analog input connected to the RING (more negative) side of the subscriber loop through a sense
resistor (R_S) and a ring relay contact. Functions with the Tip terminal to receive voice signals from the
telephone and for loop monitoring purposes.
RFS
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.
V_B+ Positive Voltage Source - Most positive supply. V_B+ is typically.
C₁
Capacitor #1 - An external capacitor to be connected between this terminal and analog ground. Required
for proper operation of the loop current limiting function, and for filtering V_B-. Typical value is 0.3µF, 30V.
DG Digital Ground - To be connected to zero potential and serves as a reference for all digital inputs and
outputs on the SLIC microcircuit.
RS 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.
RD Relay Driver - A low active open collector logic output. When enabled, the external ring relay is energized.
TF
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.
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.
V_B- Negative Voltage Source - Most negative supply. V_B- is typically -48V with an operational range of -42V
to -58V. Frequently referred to as “battery”.
BG Battery Ground - To be connected to zero potential. All loop current and some quiescent current flows into
this ground terminal.
SHD
Switch Hook Detection - A low active LS TTL - compatible logic output. This output is enabled for loop
currents exceeding the switch hook threshold.
NC Used during production test. Leave disconnected.
5