CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTES:
1. Absolute maximum ratings are limiting values, applied individually, beyond which the serviceability of the circuit may be impaired. Functional
operability under any of these conditions is not necessarily implied.
2.
θ
JA
is measured with the component mounted on an evaluation PC board in free air.
Electrical Specifications
PARAMETER
Off Hook I
B
+
Off Hook I
B
-
Off Hook Loop Current
Off Hook Loop Current
Off Hook Loop Current
Switch Hook Detection Threshold
Unless Otherwise Specified, V
BAT
= -48V, V
CC
= 5V, AG = BG = DG = 0V, Typical Parameters
T
A
= 25°C. Min-Max Parameters are Over Operating Temperature Range
CONDITIONS
R
L
= 600Ω, T
A
= 25°C
R
L
= 600Ω
R
L
= 1200Ω
R
L
= 1200Ω, V
BAT
= -42V, T
A
= 25°C
R
L
= 200Ω
SHD = V
OL
SHD = V
OH
MIN
-
-
-
17.5
25.5
10
-
0
1V
RMS
200Hz - 3400Hz, (Note 3) IEEE Method
0°C
≤
T
A
≤
75°C
TYP
-
-
21
-
30
-
-
-
MAX
5.3
39
-
-
34.5
-
5
5
UNITS
mA
mA
mA
mA
mA
mA
mA
µs
Dial Pulse Distortion
Longitudinal Balance
2-Wire Off Hook
2-Wire On Hook
Tip and Ring to TX, Off Hook
Insertion Loss
2-Wire to TX, RX to 2-Wire
Frequency Response
Idle Channel Noise
2-Wire to TX, RX to 2-Wire
200 - 3400Hz Referenced to Absolute Loss at 1kHz and
0dBm Signal Level (Note 3)
(Note 3)
At 1kHz, 0dBm Input Level, Referenced 600Ω
-
-
-
-
-
65
63
58
±0.05
±0.02
-
-
-
±0.2
±0.05
dB
dB
dB
dB
dB
-
-
1
-89
40
-
5
-85
-
-
dBrnC
dBm0p
dB
V
PEAK
Trans Hybrid Loss,
RX to TX
Overload Level, 2-Wire to TX, RX to 2-Wire
Balance Network Set Up for 600Ω Termination at 1kHz
V
CC
= +5V, (Note 3)
-
2.5
2
HC5503T
Electrical Specifications
PARAMETER
Level Linearity
2-Wire to TX, RX to 2-Wire
Unless Otherwise Specified, V
BAT
= -48V, V
CC
= 5V, AG = BG = DG = 0V, Typical Parameters
T
A
= 25°C. Min-Max Parameters are Over Operating Temperature Range
(Continued)
CONDITIONS
At 1kHz, (Note 3) Referenced to 0dBm Level
+3 to -40dBm
-40 to -50dBm
-50 to -55dBm
Power Supply Rejection Ratio
V
CC
to 2-Wire
V
CC
to Transmit
V
BAT
to 2-Wire
V
BAT
to Transmit
Logic Input Current (RS, RC)
Logic Inputs (RS, RC)
Logic ‘0’ V
IL
Logic ‘1’ V
IH
Logic Output (SHD)
Logic ‘0’ V
OL
Logic ‘1’ V
OH
NOTE:
3. 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.
I
LOAD
800µA, V
CC
= 5V
I
LOAD
40µA, V
CC
= 5V
-
2.7
0.1
-
0.5
5.0
V
V
-
2.0
-
-
0.8
5.5
V
V
0V
≤
V
IN
≤
5V
(Note 3)
200 - 3400kHz, R
L
= 600Ω
-
-
-
-
-
40
40
40
40
-
-
-
-
-
±100
dB
dB
dB
dB
µA
-
-
-
-
-
-
±0.05
±0.1
±0.3
dB
dB
dB
MIN
TYP
MAX
UNITS
Pinout
HC5503T
(SOIC)
TOP VIEW
TIP
RING
V
CC
N/C
C1
DGND
RS
N/C
TF
1
2
3
4
5
6
7
8
9
24 TX
23 AGND
22 N/C
21 RX
20 T3
19 T2
18 T1
17 N/C
16 N/C
15 N/C
14 N/C
13 SHD
RF 10
V
BAT
11
BGND 12
3
HC5503T
Pin Descriptions
24 PIN
SOIC
1
SYMBOL
TIP
DESCRIPTION
An analog input connected to the TIP (more positive) side of the subscriber loop through a 150Ω 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 150Ω feed 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
CC
is typically 5V.
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 0.3µF, 30V.
Digital Ground - To be connected to zero potential and serves as a reference for all digital inputs and outputs on the SLIC
microcircuit.
This pin should be tied to 5V.
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 150Ω feed resistor. Provides voice
signals to the telephone set and sink longitudinal current.
Ring Feed - A low impedance analog output connected to the RING terminal through a 150Ω feed resistor. Functions
with the TF terminal to provide loop current, feed voice signals to the telephone set, and sink longitudinal current.
Negative Voltage Source - Most negative supply. V
BAT
has an operational range of -24V to -58V.
Frequently 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 300Ω 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.
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
RING
V
CC
N/C
C
1
DGND
RS
N/C
TF
RF
V
BAT
BGND
SHD
N/C
N/C
N/C
N/C
T1
T2
T3
RX
22
23
24
N/C
AGND
TX
NOTE: All grounds (AGND, BGND, and DGND) must be applied before V
CC
or V
BAT
. Failure to do so may result in premature failure of the part. If
a user wishes to run separate grounds off a line card, the AG must be applied first.
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