S E M I C O N D U C T O R
HC5520
CO/PABX Polarity Reversal
Subscriber Line Interface Circuit
Description
The HC5520 is a Monolithic Subscriber Line Interface Circuit
(SLIC) for Analog Subscriber Line cards in Central Office
and PABX switches.
The HC5520 provides a comprehensive set of features for
these applications including loop reversal, zero crossing
ringing relay operation, long loop drive and a mutually inde-
pendent setting of the receive and transmit gains, and the
two wire impedance synthesis. Advanced power manage-
ment features combined with a small 44 lead MQFP pack-
age allow significant board space to be freed up for
additional line circuits.
The HC5520 is fabricated in a Harris state-of-the-art Bonded
Wafer High Voltage process, providing freedom from tradi-
tional JI latch-up phenomena without the use of additional
power supply filtering components or substrate tie connec-
tions. The very low parasitics and leakages associated with
this process provide an exceptionally flat performance over
frequency and temperature.
April 1997
Features
• Normal and Reversed DC Feed
• Current Limited Loop Feed
• Ringing, Test-In, and Test-Out Relay Drivers
• Thermal Shutdown Protection with Alert Signal
• On-Hook Transmission
• Selectable Transmit and Receive Gain Setting
• Selectable 2-Wire Impedance Matching
• Zero Crossing Ring Trip Detection and Ring Relay
Release
• Parallel Digital Control and Status Monitoring
• Protection Resistors Inside Feedback Loop Allows the
Use of PTC Devices Without Impact on Longitudinal
Balance
• Thermal Management Features
Ordering Information
TEMP.
PART NUMBER RANGE (
o
C)
HC5520CQ
HC5520CM
0 to 70
0 to 70
PACKAGE
44 Ld MQFP
44 Ld PLCC
PKG. NO.
Q44.10x10
N44.65
Applications
• CO/PABX Line Circuits
Block Diagram
R
X
TA
TB
TSDO
SHDO
PRI
PDI
RCI
TBI
TAI
RING
CONTROL
RD
R
BH
R
BL
C
RTD
BIAS
BATTERY
REFERENCE
R
PSB
POWER
MANAGEMENT
R
PSR
R
PST
R
PSG
C
P
R
DC
C
DC
LOGIC
HC5520
2-WIRE
INTERFACE
TIP
TIPSEN
RINGSEN
RING
TEST
CONTROL
4-WIRE INTERFACE / Z
0
T
X
T
X4W
R
N
K
ZO
AGND
BGND
RGND
V
BAT
V
CC
V
EE
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright
©
Harris Corporation 1997
File Number
4148.2
1
HC5520
Absolute Maximum Ratings
(Note 1)
V
CC
to AGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V
V
EE
to AGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -7V
V
BAT
to BGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80V
AGND to BGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
±3V
Digital Pins to AGND . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to 7V
ESD Withstand (Human Body Model) . . . . . . . . . . . . . . . . . . . 500V
Thermal Information
Thermal Resistance (Typical, Note 1)
θ
JA
(
o
C/W)
MQFP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . .
66
PLCC Package . . . . . . . . . . . . . . . . . . . . . . . . . . . .
46
Maximum Power Dissipation
MQFP package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.21W
PLCC Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.74W
Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . 150
o
Maximum Storage Temperature Range . . . . . . . . . .-65
o
C to 150
o
C
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . . 300
o
C
(Lead tips only)
Operating Conditions
Temperature Range
HC5520CQ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0
o
C to 70
o
C
HC5520CM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0
o
C to 70
o
C
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.
θ
JA
is measured with the component mounted on an evaluation PC board in free air.
Recommended Operating Conditions
For maximum integrity, nominal operating conditions should be selected so that operation is always within the following ranges:
PARAMETER
Battery Supply
Positive Supply
Negative Supply
Ringing Supply
Loop Resistance
Ambient Temperature
Die Temperature
SYMBOL
V
BAT
V
CC
V
EE
V
RINGING
R
L
T
A
T
D
CONDITIONS
MIN
-42
4.75
-4.75
60
200
0
-
TYP
-48
5
-5
75
-
25
-
MAX
-58
5.25
-5.25
90
1800
70
150
UNITS
V
DC
V
DC
V
DC
V
RMS
Ω
o
C
o
C
Unless Otherwise Specified: Typical Parameters are at T
A
= 25
o
C, V
CC
= +5V, V
EE
= -5V, V
BAT
= -48V,
AGND = BGND = RGND = 0V, Min-Max Parameters are Over Power Supply and Operating Temperature Range. All Transmission Parame-
ters are Specified at 600
Ω
2-Wire Terminating Impedance with 0dB transmit and receive gain.
Electrical Specifications
CONDITIONS
PARAMETER
MODE
LOAD
V
BAT
OTHER
CONDITIONS
FREQ/
LEVEL
MIN
TYP
MAX
UNITS
POWER SUPPLY CURRENTS (Figure 4)
I
CC
normal
reverse
p’down
normal
reverse
p’down
normal
reverse
p’down
Open
-48V
V
CC
= 5V
5.0
6.0
2.0
-6.0
-7.0
-3.0
-7.0
-7.0
-1.0
8.0
8.9
3.7
-3.6
-4.9
-1.7
-4.2
-4.0
-0.4
11.0
12.0
5.5
-2.0
-3.0
-0.7
-2.0
-2.0
0.0
mA
mA
mA
mA
mA
mA
mA
mA
mA
I
EE
Open
-48V
V
EE
= -5V
I
BB
Open
-48V
V
CC
= 5V,
V
EE
= -5V
THERMAL SHUTDOWN
Thermal Shutdown Temperature,
Die Temperature
normal
reverse
-48V
-
150
-
o
C
BATTERY FEED CHARACTERISTICS - 2W VOLTAGES (Figure 4)
V
TIP
normal
reverse
Open
-48V
-5.50
-46.00
-4.16
-43.60
-2.46
-42.00
V
V
2
HC5520
Unless Otherwise Specified: Typical Parameters are at T
A
= 25
o
C, V
CC
= +5V, V
EE
= -5V, V
BAT
= -48V,
AGND = BGND = RGND = 0V, Min-Max Parameters are Over Power Supply and Operating Temperature Range. All Transmission Parame-
ters are Specified at 600
Ω
2-Wire Terminating Impedance with 0dB transmit and receive gain.
(Continued)
Electrical Specifications
CONDITIONS
PARAMETER
V
RING
V
TIP
V
RING
MODE
normal
reverse
normal
reverse
normal
reverse
LOAD
Open
Open
Open
V
BAT
-48V
-42V
-42V
OTHER
CONDITIONS
FREQ/
LEVEL
MIN
-45.54
-6.00
-5.00
-40.00
-39.54
-5.00
TYP
-43.80
-4.26
-3.68
-38.12
-38.34
-3.78
MAX
-42.50
-2.00
-2.46
-37.00
-37.00
-2.00
UNITS
V
V
V
V
V
V
BATTERY FEED CHARACTERISTICS - LOOP CURRENT (Figure 5)
Normal Loop Current
Normal Loop Current
Short Circuit Loop Current Limit
normal
reverse
normal
reverse
normal
reverse
1800Ω
1800Ω
100Ω
-42V
-48V
-48V
14.5
14.5
18.0
18.0
22.0
22.0
16.5
16.3
18.8
18.6
26.4
27.0
19.0
19.0
22.0
22.0
42.0
42.0
mA
mA
mA
mA
mA
mA
LOOP SUPERVISION - SWITCH HOOK DETECTION (Figure 6)
Off-Hook Detection
normal
reverse
-48V
2.4K
4.6K
9K
Ω
LOOP SUPERVISION - DIAL PULSE DISTORTION (Figure 7)
Dial Pulse Distortion
Dial Pulse Distortion
normal
normal
100Ω
1800Ω
-58V
-42V
25
o
C
25
o
C
-
-
0.1
0.1
3
3
%
%
LOOP SUPERVISION - RING TRIP DETECTION (Figure 8)
Ring Trip Detect
Ring Trip Non-Detect
Ringing
Ringing
1800Ω
+1REN
3REN//
20KΩ
-42V
60V
RMS
-58V
90V
RMS
-
20K
-
-
150
-
ms
Ω
LOOP SUPERVISION - POLARITY REVERSAL TIME (Figure 9)
Polarity Reversal Time
normal
to
reverse
reverse
to
normal
1800Ω
-42V
-
0.04
10
ms
Polarity Reversal Time
1800Ω
-42V
-
0.04
10
ms
LOOP SUPERVISION - DIGITAL INTERFACE
Input Low Voltage, V
IL
Input High Voltage, V
IH
Input Low Current, I
IL
Input High Current, I
IH
Output Low Voltage, V
OL
Output High Voltage, V
OH
Relay Driver Output Low Voltage, V
OL
Relay Driver Output High Current, I
OH
All Digital Inputs
All Digital Inputs
AGND < V
IN
< V
IL
V
IH
< V
IN
< V
CC
1 LSTTL Load
1 LSTTL Load
V
CC
= 4.75V, Load = 35mA
V
CC
= 5.25V
-
2.0
-20
-
-
2.4
-
-
-
-
-
0
-
-
0.4
-
0.8
-
-
+10
0.4
-
0.8
10
V
V
µA
µA
V
V
V
µA
3
HC5520
Unless Otherwise Specified: Typical Parameters are at T
A
= 25
o
C, V
CC
= +5V, V
EE
= -5V, V
BAT
= -48V,
AGND = BGND = RGND = 0V, Min-Max Parameters are Over Power Supply and Operating Temperature Range. All Transmission Parame-
ters are Specified at 600
Ω
2-Wire Terminating Impedance with 0dB transmit and receive gain.
(Continued)
Electrical Specifications
CONDITIONS
PARAMETER
MODE
LOAD
V
BAT
OTHER
CONDITIONS
FREQ/
LEVEL
MIN
TYP
MAX
UNITS
TRANSMISSION PARAMETERS - 4-WIRE TO 2-WIRE RECEIVE GAIN (Figure 10)
Absolute Receive Gain, ARG
normal
reverse
600Ω
-48V
1020Hz
0dBm
-0.2
0
+0.2
dB
TRANSMISSION PARAMETERS - 4-WIRE TO 2-WIRE FREQUENCY RESPONSE (Figure 10)
Receive Frequency Response
Relative to ARG
normal
reverse
600Ω
-48V
300 to 3.4kHz
0dBm
-0.15
0
+0.15
dB
TRANSMISSION PARAMETERS - 4-WIRE TO 2-WIRE GAIN TRACKING (Figure 10)
Receive Gain Tracking Relative to
ARG
normal
reverse
600Ω
-48V
+3 to -40dBm0
-40 to -50dBm0
1020Hz
-0.12
-
0
0
+0.12
-
dB
dB
TRANSMISSION PARAMETERS - 4-WIRE TO 2-WIRE SIGNAL TO DISTORTION (Figure 10)
Receive Signal to Distortion and
Noise
normal
reverse
600Ω
-48V
+3 to -40dBm0
-40 to -50dBm0
1020Hz
33
-
38
33
-
-
dB
dB
TRANSMISSION PARAMETERS - 4-WIRE TO 2-WIRE IDLE CHANNEL NOISE (Figure 10)
Idle Channel Noise
normal
reverse
600Ω
-48V
P-Message
73
78
-
dBm0P
TRANSMISSION PARAMETERS - 2-WIRE TO 4-WIRE TRANSMIT GAIN (Figure 11)
Absolute Transmit Gain, ATG
normal
reverse
600Ω
-48V
1020Hz
0dBm
-0.2
-0.07
+0.2
dB
TRANSMISSION PARAMETERS - 2-WIRE TO 4-WIRE FREQUENCY RESPONSE (Figure 11)
Transmit Frequency Response
Relative to ATG
normal
reverse
600Ω
-48V
300 to 3.4kHz
0dBm
-0.2
-0.04
+0.2
dB
TRANSMISSION PARAMETERS - 2-WIRE TO 4-WIRE GAIN TRACKING (Figure 11)
Transmit Gain Tracking Relative to
ATG
normal
reverse
600Ω
-48V
+3 to -40dBm0
-40 to -50dBm0
1020Hz
-0.12
-
0
0.02
+0.12
-
dB
dB
TRANSMISSION PARAMETERS - 2-WIRE TO 4-WIRE SIGNAL TO DISTORTION (Figure 11)
Transmit Signal to Distortion and
Noise
normal
reverse
600Ω
-48V
+3 to -40dBm0
-40 to -50dBm0
1020Hz
33
-
38
33
-
dB
dB
TRANSMISSION PARAMETERS - 2-WIRE TO 4-WIRE IDLE CHANNEL NOISE (Figure 11)
Idle Channel Noise
normal
reverse
600Ω
-48V
P Message
73
78
-
dB
TRANSMISSION PARAMETERS - 2-WIRE RETURN LOSS (Figure 12)
2-Wire Return Loss
normal
reverse
600Ω
-48V
R
N
= 6490Ω
K
ZO
= 15400Ω
1020Hz
0dBm
30
45
-
dB
TRANSMISSION PARAMETERS - 4-WIRE TO 4-WIRE INSERTION LOSS (Figure 13)
4-Wire to 4-Wire Insertion Loss
normal
reverse
600Ω
-48V
1020Hz
0dBm
-0.2
-0.02
+0.2
dB
TRANSMISSION PARAMETERS - TRANSHYBRID BALANCE (Figure 13)
Transhybrid Balance
normal
reverse
600Ω
-48V
1020Hz
0dBm
30
38
-
dB
4
HC5520
Unless Otherwise Specified: Typical Parameters are at T
A
= 25
o
C, V
CC
= +5V, V
EE
= -5V, V
BAT
= -48V,
AGND = BGND = RGND = 0V, Min-Max Parameters are Over Power Supply and Operating Temperature Range. All Transmission Parame-
ters are Specified at 600
Ω
2-Wire Terminating Impedance with 0dB transmit and receive gain.
(Continued)
Electrical Specifications
CONDITIONS
PARAMETER
MODE
LOAD
V
BAT
OTHER
CONDITIONS
FREQ/
LEVEL
MIN
TYP
MAX
UNITS
TRANSMISSION PARAMETERS - 4-WIRE TO 4-WIRE ABSOLUTE DELAY
Absolute Delay
normal
reverse
600Ω
-48V
1020Hz
0dBm
1.5
µs
TRANSMISSION PARAMETERS - OVER LOAD LEVEL (Figures 14, 15)
Receive Over Load Level at 4W
and 2W
Transmit Over Load Level at 2W
and 4W
normal
reverse
normal
reverse
600Ω
600Ω
-42V
-42V
1% THD
1% THD
1020Hz
1020Hz
2.5
2.15
-
-
-
-
V
PEAK
V
PEAK
TRANSMISSION PARAMETERS - LONGITUDINAL IMPEDANCE (Figure 16)
Longitudinal Impedance per Wire
normal
reverse
-
-48V
40Hz to
100Hz
-
50
-
Ω
TRANSMISSION PARAMETERS - LONGITUDINAL CURRENT CAPABILITY (Figure 17)
Longitudinal Current Limit per Wire
normal
reverse
-
-42V
Triangle
Waveform
40Hz to
100Hz
15
-
-
mA
PEAK
TRANSMISSION PARAMETERS - LONGITUDINAL BALANCE (Figure 18)
2-Wire Longitudinal Balance
normal
reverse
normal
reverse
368Ω +
368Ω
368Ω +
368Ω
-48V
300Hz
1020Hz
3400Hz
300Hz
1020Hz
3400Hz
42
48
48
42
48
48
62.2
58.7
69.5
66.0
67.2
77.0
-
dB
dB
dB
dB
dB
dB
4-Wire Longitudinal Balance
-48V
-
POWER SUPPLY REJECTION RATIO (Figure 19)
PSRR V
BAT
To 4-Wire
PSRR V
BAT
To 2-Wire
PSRR V
CC
To 4-Wire
PSRR V
CC
To 2-Wire
PSRR V
EE
To 4-Wire
PSRR V
EE
To 2-Wire
normal
reverse
normal
reverse
normal
reverse
normal
reverse
normal
reverse
normal
reverse
600Ω
600Ω
600Ω
600Ω
600Ω
600Ω
-48V
-48V
-48V
-48V
-48V
-48V
V
BAT
= -48V +
100mV
RMS
V
BAT
= -48V +
100mV
RMS
V
CC
= 4.75V +
100mV
RMS
V
CC
= 4.75V +
100mV
RMS
V
EE
= -4.75V +
100mV
RMS
V
EE
= -4.75V +
100mV
RMS
300Hz
300Hz
300Hz
3420Hz
2500Hz
2500Hz
30
30
20
20
20
20
42
42
33
24
30
32
-
-
-
-
-
-
dBC
dBC
dBC
dBC
dBC
dBC
5
51单片机
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