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.
Electrical Specifications
PARAMETER
On Hook Power Dissipation
Off Hook Power Dissipation
Off Hook IB+
Off Hook IB+
Off Hook IB-
Off Hook Loop Current
Off Hook Loop Current
Off Hook Loop Current
Fault Currents
TIP to Ground
RING to Ground
TIP to RING
TIP and RING to Ground
Ring Relay Drive V
OL
Ring Relay Driver Off Leakage
Ring Trip Detection Period
On Hook Ringing Current
Switch Hook Detection Threshold
Unless Otherwise Specified, V
B
- = -48V, V
B
+ = +12V and +5V, AG = BG = DG = 0V, Typical Parameters
T
A
= +25
o
C. Min-Max Parameters are Over Operating Temperature Range.
CONDITIONS
I
LONG
* = 0, V
B
+ = +12V
R
L
= 600Ω, I
LONG
* = 0, V
B
+ = +12V
R
L
= 600Ω, I
LONG
* = 0, T
A
= -40
o
C
R
L
= 600Ω, I
LONG
* = 0, T
A
= +25
o
C
R
L
= 600Ω, I
LONG
* = 0
R
L
= 1200Ω, I
LONG
* = 0
R
L
= 1200Ω, V
B
- = -42V, I
LONG
* = 0
T
A
= +25
o
C
R
L
= 200Ω, I
LONG
* = 0
MIN
-
-
-
-
-
-
17.5
36
TYP
170
425
-
-
35
21
-
41
MAX
235
550
6.0
5.3
41
-
-
48
UNITS
mW
mW
mA
mA
mA
mA
mA
mA
-
-
-
-
I
OL
= 62mA
V
RD
= +12V, RC = 1 = HIGH, T
A
=
R
L
= 600Ω
+25
o
C
-
-
-
-
SHD = V
OL
SHD = V
OH
GKD = V
OL
GKD = V
OH
R
L
= 200Ω
(Note 2)
(Note 2)
(Referenced to 600Ω + 2.16µF), (Note 2)
-
-
-
1V
RMS
200Hz - 3400Hz, (Note 2) IEEE Method
58
60
0
o
C
14
55
41
55
0.2
-
2
-
-
-
-
-
±2
-
110
10
-
-
-
-
0.5
100
3
30
-
12
-
10
-
5
-
20
mA
mA
mA
mA
V
µA
Ring
Cycles
mApk
mA
mA
mA
mA
mA
ms
kΩ
Ω
18
-
20
-
-
0
-
-
Ground Key Detection Threshold
Loop Current During Power Denial
Dial Pulse Distortion
Receive Input Impedance
Transmit Output Impedance
Two Wire Return Loss
SR
L
LO
ER
L
SR
L
HI
Longitudinal Balance
2 Wire Off Hook
2 Wire On Hook
4 Wire Off Hook
15.5
24
31
-
-
-
dB
dB
dB
65
63
58
-
-
-
dB
dB
dB
≤
T
A
≤
+75
o
C
50
8-20
Specifications HC-5504DLC
Electrical Specifications
PARAMETER
Low Frequency Longitudinal Balance
Unless Otherwise Specified, V
B
- = -48V, V
B
+ = +12V and +5V, AG = BG = DG = 0V, Typical Parameters
T
A
= +25
o
C. Min-Max Parameters are Over Operating Temperature Range. (Continued)
CONDITIONS
R.E.A. Method, (Note 2), R
L
= 600Ω
0
o
C
≤
T
A
≤
+75
o
C
at 1kHz, 0dBm Input Level, Referenced 600Ω
-
200 - 3400Hz Referenced to Absolute Loss at
1kHz and 0dBm Signal Level (Note 2)
(Note 2)
-
-
Absolute Delay
2 Wire - 4 Wire, 4 Wire - 2 Wire
Trans Hybrid Loss
Overload Level
2 Wire - 4 Wire, 4 Wire - 2 Wire
Level Linearity
2 Wire - 4 Wire, 4 Wire - 2 Wire
Balance Network Set Up for 600Ω Termination at
1kHz
V
B
+ = +5V
V
B
+ = +12V
At 1kHz, (Note 2) Referenced to 0dBm Level
+3 to -40dBm
-40 to -50dBm
-50 to -55dBm
Power Supply Rejection Ratio
V
B
+ to 2 Wire
V
B
+ to Transmit
V
B
- to 2 Wire
V
B
- to Transmit
V
B
+ to 2 Wire
V
B
+ to Transmit
V
B
- to 2 Wire
V
B
- to Transmit
Logic Input Current (RS, RC, PD)
Logic Inputs
Logic ‘0’ V
IL
Logic ‘1’ V
IH
Logic Outputs
Logic ‘0’ V
OL
Logic ‘1’ V
OH
* I
LONG
= Longitudinal Current
NOTES:
1. Absolute maximum ratings are limiting values, applied individually, beyond which the serviceability of the circuit may be impaired. Func-
tional operability under any of these conditions is not necessarily implied.
2. 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 spec-
ification compliance.
I
LOAD
800µA, V
B
+ = +12V, +5V
I
LOAD
80µA, V
B
+ = +12V
I
LOAD
40µA, V
B
+ = +5V
-
2.7
2.7
0.1
5.0
-
0.5
5.5
5.0
V
V
V
-
2.0
-
-
0.8
5.5
V
V
0V
≤
V
IN
≤
+ 5V
200 - 16kHz R
L
= 600Ω
(Note 2)
30 - 60Hz, R
L
= 600Ω
15
15
15
15
30
30
30
30
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
±100
dB
dB
dB
dB
dB
dB
dB
dB
µA
-
-
-
-
-
-
±0.05
±0.1
±0.3
dB
dB
dB
(Note 2)
-
36
1.5
1.75
-
40
-
-
2
-
-
-
ms
dB
Vpeak
Vpeak
1
-89
5
-85
dBrnC
dBm0p
-
±0.05
±0.02
±0.2
±0.05
dB
dB
MIN
-
-
TYP
-
-
MAX
23
-67
UNITS
dBrnC
dBm0p
Insertion Loss
2 Wire - 4 Wire, 4 Wire - 2 Wire
Frequency Response
Idle Channel Noise
2 Wire - 4 Wire, 4 Wire - 2 Wire
8-21
Specifications HC-5504DLC
Uncommitted Op Amp Specifications
PARAMETER
Input Offset Voltage
Input Offset Current
Input Bias Current
Differential Input Resistance
Output Voltage Swing
(Note 2)
R
L
= 10K, V
B
+ = +12V
R
L
= 10K, V
B
+ = +5V
Output Resistance
Small Signal GBW
A
VCL
= 1 (Note 2)
(Note 2)
CONDITIONS
MIN
-
-
-
-
-
-
-
-
TYP
±5
±10
20
1
±5
±3
10
1
MAX
-
-
-
-
-
-
-
-
UNITS
mV
nA
nA
MΩ
V
PEAK
V
PEAK
Ω
MHz
Pin Descriptions
28 PIN
PLCC
2
24 PIN
DIP/SOIC
1
SYMBOL
TIP
DESCRIPTION
An analog input connected to the TIP (more positive) side of the subscriber loop through a 150Ω feed
resistor and a ring relay contact. 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 and a ring relay contact. Functions with the Tip terminal to receive voice signals from the
telephone and for loop monitoring purposes.
Senses ring side of loop for ground key and ring trip detection. During ringing, the ring signal is insert-
ed into the line at this node and RF is isolated from RFS via a relay.
Positive Voltage Source - Most positive supply. V
B
+ is typically 12V or 5V.
Capacitor #3 - 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.
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.
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 150Ω feed resistor.
Functions with the RF terminal to provide loop current, feed 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
B
- is typically -48V with an operational range of
-42V 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.
Ground Key Detection - A low active LS TTL - compatible logic output. This output is enabled if the
DC current into the ring lead exceeds the DC current out of the tip lead by more than 20mA, and dis-
abled if this current difference is below an internally set threshold.
Power Denial - A low active TTL - Compatible logic input. When enabled, the switch hook detect
(SHD) and ground key detect (GKD) are not necessarily valid, and the relay driver (RD) output is dis-
abled.
3
2
RING
4
5
6
3
4
5
RFS
V
B
+
C3
7
9
6
7
DG
RS
10
11
8
9
RD
TF
12
10
RF
13
14
16
17
11
12
13
14
V
B
-
BG
SHD
GKD
18
15
PD
8-22
Specifications HC-5504DLC
Pin Descriptions (Continued)
28 PIN
PLCC
19
24 PIN
DIP/SOIC
16
SYMBOL
RC
DESCRIPTION
Ring Command - A low active TTL - Compatible logic input. When enabled, the relay driver (RD)
output goes low on the next high level of the ring sync (RS) input, as long as the SLIC is not in the
power denial state (PD = 0) or the subscriber is not already off- hook (SHD = 0).
Capacitor #2 - An external capacitor to be connected between this terminal and digital ground.
Prevents false ground key indications from occurring during ring trip detection. Typical value is
0.15µF, 10V. This capacitor is not used if ground key function is not required and (Pin 17) may be left
open or connected to digital ground.
The analog output of the spare operational amplifier. The output voltage swing is typically
±5V.
The inverting analog input of the spare operational amplifier.
The non-inverting analog input of the spare operational amplifier.
Receive Input, Four 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, Four 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.
20
17
C2
21
23
24
25
18
19
20
21
OUT
-IN
+IN
RX
26
22
C4
27
28
23
24
AG
TX
1,8,15,22
NC
NOTE: All grounds (AG, BG, & DG) must be applied before V
B
+ or V
B
-. 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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