®
CT
O D U EM EN T
R
TE P P LA C
O LE
E
O B S N D ED R 5
E
18
Data
MM
O
Sheet
HC55
R EC
HC55171
August 2003
FN4323.6
5 REN Ringing SLIC for ISDN Modem/TA
and WLL
The HC55171 is backward compatible to the HC5517 with
the added capability of driving 5 REN loads. The HC55171 is
ideal for any modem or remote networking access
application that requires plain old telephone service POTS,
capability. The linear amplifier design allows a choice of
Sinusoidal, Square wave or Trapezoidal ringing. The voltage
feed architecture eliminates the need for a high current gain
node achieving improved system noise immunity, an
advantage in highly integrated systems.
The device is manufactured in a high voltage Dielectric
Isolation (DI) process with an operating voltage range from
-16V, for off-hook operation and -80V for ring signal
injection. The DI process provides substrate latch up
immunity, resulting in a robust system design.
Features
• 5 REN Thru SLIC Ringing Capability to 75V
PEAK
• Trapezoid, Square and Sinusoid Ringing Capability
• Bellcore Compliant Ringing Voltage Levels
• Lowest Component Count Trapezoidal Solution
• Single Additional +5V Supply
• Pin For Pin Compatible With HC5517
• DI Provides Latch-Up Immunity
Applications
• ISDN Internal / External Modems
• ISDN Terminal Adapters / Routers
• Wireless Local Loop Subscriber Terminals
• Cable Telephony Set-Top Boxes
Pinout
HC55171 (PLCC)
TOP VIEW
AGND
VREF
V
BAT
• Digital Added Main Line
• Integrated LAN/PBX
• Related Literature
- AN9606, Operation of the HC5517/171 Evaluation
Board
- AN9607, Impedance Matching Design Equations
- AN9628, AC Voltage Gain
- AN9608, Implementing Pulse Metering
- AN9636, Implementing an Analog Port for ISDN Using
the HC5517
- AN549, The HC-5502X/4X Telephone Subscriber Line
Interface Circuits (SLIC)
RF
26
25 TF
24 VRING
23 NU
22 BGND
21 RDO
20 RDI
19
V
TX
V
CC
4
F0
RS
SHD
RTD
TST
ALM
5
6
7
8
9
10
RTI
28
F1
3
2
1
27
ILMT 11
12
OUT 1
13
-IN 1
14
TIP SENSE
15
RING SENSE 1
16
RING SENSE 2
17
V
RX
18
NU
Part Number Information
PART NUMBER
HC55171IM
TEMP. RANGE
(
o
C)
-40 to 85
PACKAGE
28 Ld PLCC
PKG.
DWG. #
N28.45
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2003. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
HC55171
Pin Descriptions
PLCC
1
2
3
4
SYMBOL
AGND
V
CC
V
REF
F1
DESCRIPTION
Analog Ground - Serves as a reference for the transmit output and receive input terminals.
Positive Voltage Source - Most Positive Supply.
An external voltage connected to this pin will override the internal V
BAT
/2 reference.
Power Denial - An active low TTL compatible logic control input. When enabled, the output of the ring amplifier will
ramp close to the output voltage of the tip amplifier.
TTL compatible logic control input that must be tied high for proper SLIC operation.
TTL compatible logic control input that must be tied high for proper SLIC operation.
Switch Hook Detection - An active low TTL compatible logic output. Indicates an off-hook condition.
Ring Trip Detection - An active low TTL compatible logic output. Indicates an off-hook condition when the phone is
ringing.
A TTL logic input. A low on this pin will keep the SLIC in a power down mode. The TST pin in conjunction with the ALM
pin can provide thermal shutdown protection for the SLIC. Thermal shutdown is implemented by a system controller
that monitors the ALM pin. When the ALM pin is active (low) the system controller issues a command to the TST pin
(low) to power down the SLIC. The timing of the thermal recovery is controlled by the system controller.
A TTL compatible active low output which responds to the thermal detector circuit when a safe operating die
temperature has been exceeded.
Loop Current Limit - Voltage on this pin sets the short loop current limiting conditions.
The analog output of the spare operational amplifier.
The inverting analog input of the spare operational amplifier. The non-inverting input is internally connected to AGND.
An analog input connected to the TIP (more positive) side of the subscriber loop through a feed resistor. Functions
with the RING terminal to receive voice signals and for loop monitoring purpose.
5
6
7
8
F0
RS
SHD
RTD
9
TST
10
ALM
11
12
13
14
I
LMT
OUT1
-IN1
TIP SENSE
15
RING SENSE 1 An analog input connected to the RING (more negative) side of the subscriber loop through a feed resistor. Functions
with the TIP terminal to receive voice signals and for loop monitoring purposes.
RING SENSE 2 This is an internal sense mode that must be tied to RING SENSE 1 for proper SLIC operation.
V
RX
NU
V
TX
RDI
RDO
BGND
NU
V
RING
TF
RF
V
BAT
RTI
Receive Input, 4-Wire Side - A high impedance analog input. AC signals appearing at this input drive the Tip Feed and
Ring Feed amplifiers deferentially.
Not used in this application. This pin should be left floating.
Transmit Output, 4-Wire Side - A low impedance analog output which represents the differential voltage across TIP
and RING. Since the DC level of this output varies with loop current, capacitive coupling to the next stage is necessary.
TTL compatible input to drive the uncommitted relay driver.
This is the output of the uncommitted relay driver.
Battery Ground - All loop current and some quiescent current flows into this terminal.
Not used in this application. This pin should be either grounded or left floating.
Ring signal input.
This is the output of the tip amplifier.
This is the output of the ring amplifier.
The negative battery source.
Ring Trip Input - This pin is connected to the external negative peak detector output for ring trip detection.
16
17
18
19
20
21
22
23
24
25
26
27
28
2
HC55171
Block Diagram
TIP FEED
TIP SENSE
2-WIRE
INTERFACE
4-WIRE
INTERFACE
V
RX
V
TX
V
RING
-
+
- IN 1
OUT 1
RING FEED
RING SENSE 1
RING SENSE 2
V
REF
RTI
V
BAT
V
CC
LOOP CURRENT
DETECTOR
FAULT
DETECTOR
CURRENT
LIMIT
RING TRIP
DETECTOR
SHD
ALM
I
LMT
RTD
RELAY
DRIVER
RDI
RDO
BIAS
AGND
BGND
F1
F0
RS
TST
IIL LOGIC INTERFACE
3
HC55171
Absolute Maximum Ratings
T
A
= 25
o
C
Maximum Supply Voltages
V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to +7V
V
CC
- V
BAT
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90V
Relay Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to +15V
Thermal Information
Thermal Resistance (Typical, Note 1)
θ
JA
(
o
C/W)
PLCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
55
Maximum Junction Temperature Plastic . . . . . . . . . . . . . . . . .150
o
C
Maximum Storage Temperature Range . . . . . . . . . -65
o
C to 150
o
C
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . .300
o
C
(PLCC - Lead Tips Only)
Operating Conditions
Temperature Range
HC55171IM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40
o
C to 85
o
C
Relay Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +5V to +12V
Positive Power Supply, V
CC
. . . . . . . . . . . . . . . . . . . . . . . +5V
±5%
Negative Power Supply, V
BAT
. . . . . . . . . . . . . . . . . . . .-16V to -80V
Die Characteristics
Transistor Count . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 224
Diode Count. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Die Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175 x 144
Substrate Potential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .V
BAT
Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bipolar-DI
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
NOTE:
1.
θ
JA
is measured with the component mounted on an evaluation PC board in free air.
Electrical Specifications
Unless Otherwise Specified, Typical Parameters are at T
A
= 25
o
C, Min-Max Parameters are over
Operating Temperature Range, V
BAT
= -24V, V
CC
= +5V, AGND = BGND = 0V. All AC Parameters are
specified at 600Ω 2-Wire terminating impedance.
TEST CONDITIONS
MIN
TYP
MAX
UNITS
PARAMETER
RINGING TRANSMISSION PARAMETERS
V
RING
Input Impedance
4-Wire to 2-Wire Gain
AC TRANSMISSION PARAMETERS
RX Input Impedance
OUT1 Positive Output Voltage Swing
OUT1 Negative Output Voltage Swing
4-Wire Input Overload Level
2-Wire Return Loss
(Note 2)
-
-
5.4
40
-
-
kΩ
V/V
V
RING
to V
T-R
(Note 2)
300Hz to 3.4kHz (Note 2)
R
L
= 10kΩ (Note 2)
R
L
= 10kΩ (Note 2)
300Hz to 3.4kHz R
L
= 1200Ω, 600Ω Reference
(Note 2)
Matched for 600Ω, f = 300Hz (Note 2)
Matched for 600Ω, f = 1000Hz (Note 2)
Matched for 600Ω, f = 3400Hz (Note 2)
-
+2.5
-4.5
-
37
40
30
58
-
-
-
-
-
-
-
-
-
108
-
-
+3.1
-
-
-
63
55
40
±0.05
±0.05
-
±0.02
-
-
-
-
-
-
-
-
-
-
-
-
-
±0.2
±0.2
±0.25
±0.06
±0.10
±0.12
±0.30
kΩ
V
V
V
PEAK
dB
dB
dB
dB
dB
mA
RMS
dB
dB
dB
dB
dB
dB
dB
2-Wire Longitudinal to Metallic Balance Off Hook Per ANSI/IEEE STD 455-1976 300Hz to 3400Hz
(Note 2)
4-Wire Longitudinal Balance Off Hook
Longitudinal Current Capability
Insertion Loss, 2W-4W
Insertion Loss, 4W-2W
Insertion Loss, 4W-4W
Frequency Response
Level Linearity
300Hz to 3400Hz (Note 2)
I
LINE
= 40mA, T
A
= 25
o
C (Note 2)
0dBmO, 1kHz, Includes Transhybrid Amp Gain = 3
0dBmO,1kHz
0dBmO, 1kHz, Includes Transhybrid Amp Gain = 3
300Hz to 3400Hz Referenced to Absolute Level at
1kHz, 0dBm Referenced 600Ω
+3 to 0dBm, Referenced to -10dBm (Note 2)
0 to -40dBm, Referenced to -10dBm (Note 2)
-40 to -55dBm, Referenced to -10dBm (Note 2)
4
HC55171
Electrical Specifications
Unless Otherwise Specified, Typical Parameters are at T
A
= 25
o
C, Min-Max Parameters are over
Operating Temperature Range, V
BAT
= -24V, V
CC
= +5V, AGND = BGND = 0V. All AC Parameters are
specified at 600Ω 2-Wire terminating impedance.
(Continued)
TEST CONDITIONS
300Hz to 3400Hz (Note 2)
300Hz to 3400Hz (Note 2)
300Hz to 3400Hz (Note 2)
V
IN
= 1V
P-P
at 1kH (Note 2)
Reference Level 0dBm at 600Ω 300Hz to 3400Hz
(Note 2)
C-Message (Note 2)
Psophometric (Note 2)
PSRR, V
CC
to 2W
PSRR, V
CC
to 4W
PSRR, VBAT to 2W
PSRR, VBAT to 4W
PSRR, V
CC
to 2W
PSRR, V
CC
to 4W
PSRR, VBAT to 2W
PSRR, VBAT to 4W
PSRR, V
CC
to 2W
PSRR, V
CC
to 4W
PSRR, VBAT to 2W
PSRR, VBAT to 4W
DC PARAMETERS
Loop Current Programming Range
Loop Current Programming Accuracy
Loop Current During Power Denial
Fault Current, Tip to Ground
Fault Current, Ring to Ground
Fault Current, Tip and Ring to Ground
Switch Hook Detection Threshold
Ring Trip Comparator Voltage Threshold
Thermal ALARM Output
Dial Pulse Distortion
Safe Operating Die Temperature Exceeded (Note 2)
(Note 2)
(Note 2)
R
L
= 200Ω, V
BAT
= -48V
(Note 2)
(Note 3)
20
-10
-
-
-
-
9
-0.28
-
-
-
-
±4
90
100
130
12
-0.24
160
0.1
60
+10
-
-
-
-
15
-0.22
-
0.5
mA
%
mA
mA
mA
mA
mA
V
o
C
PARAMETER
Absolute Delay, 2W-4W
Absolute Delay, 4W-2W
Absolute Delay, 4W-4W
Transhybrid Loss
Total Harmonic Distortion
2-Wire/4-Wire, 4-Wire/2-Wire, 4-Wire/4-Wire
Idle Channel Noise 2-Wire and 4-Wire
MIN
-
-
-
36
-
-
-
30
45
23
33
TYP
-
-
0.95
40
-
3
-87
35
47
28
38
35
46
50
60
34
40
40
50
MAX
1.0
1.0
-
-
-50
-
-
-
-
-
-
-
-
-
-
-
-
-
-
UNITS
µs
µs
µs
dB
dB
dBrnC
dBmp
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
30Hz to 200Hz, R
L
= 600Ω (Note 2)
200Hz to 3.4kHz, R
L
= 600Ω (Note 2)
33
44
40
50
3.4kHz to 16kHz, R
L
= 600Ω (Note 2)
30
35
30
40
ms
5
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