Intersil Corporation HC-5524 Datasheet
HC-5524
Data Sheet February 1999 File Number 2798.6
EIA/ITU 24V PABX SLIC with 25mA
Loop Feed
The HC-5524 telephone Subscriber Line Interface Circuit
integrates most of the BORSCHT functions on a monolithic
IC. The device is manufactured in a Dielectric Isolation (DI)
process and is designed for use as a 24V interface between
the traditional telephone subscriber pair (Tip and Ring) and
the low voltage filtering and coding/decoding functions ofthe
line card. Together with a secondary protection diode bridge,
the device will withstand 500V induced surges, in plastic
packages. The SLIC also maintains specified transmission
performance in the presence of externally induced
longitudinal currents. The BORSCHT functions that the SLIC
provides are:
• Battery Feed with Subscriber Loop Current Limiting
• Overvoltage Protection
• Ring Relay Driver
• Supervisory Signaling Functions
• Hybrid Functions (with External Op-Amp)
• Test (or Battery Reversal) Relay Driver
In addition, the SLIC provides selective denial of power to
subscriber loops, a programmable subscriber loop current
limit from 20mA to 60mA, a thermal shutdown with an alarm
output and line fault protection. Switch hook detection, ring
trip detection and ground key detection functions are also
incorporated in the SLIC device.
The HC-5524 SLIC is ideally suited for line card designs in
PBX and DLC systems, replacing traditional transformer
solutions.
Ordering Information
TEMP.
PART NUMBER
HC4P5524-9 -40 to 85 44 Ld PLCC N44.65
HC9P5524-5 0 to 75 28 Ld SOIC M28.3
RANGE (oC) PACKAGE
PKG.
NO.
Features
• DI Monolithic High Voltage Process
• Compatible with Worldwide PBX and DLC Performance
Requirements
• Controlled Supply of Battery Feed Current with
Programmable Current Limit
• Operates with 5V Positive Supply (V
• Internal Ring Relay Driver and a Utility Relay Driver
• High Impedance Mode for Subscriber Loop
• High Temperature Alarm Output
• Low Power Consumption During Standby Functions
• Switch Hook, Ground Key, and Ring Trip Detection
• Selective Power Denial to Subscriber
• Voice Path Active During Power Denial
• On-Chip Op Amp for 2-Wire Impedance Matching
+)
B
Applications
• Solid State Line Interface Circuit for PBX or Digital Loop
Carrier Systems
• Hotel/Motel Switching Systems
• Direct Inward Dialing (DID) Trunks
• Voice Messaging PBXs
• 2-Wire/4-Wire, 4-Wire/2-Wire Hybrid
• Related Literature
- AN9607, Impedance Matching Design Equations
- AN9628, AC Voltage Gain
- AN9608, Implementing Pulse Metering
- AN549, The HC-5502S/4X Telephone Subscriber Line
Interface Circuits (SLIC)
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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| Copyright © Intersil Corporation 1999
HC-5524
Absolute Maximum Ratings (Note 1) Thermal Information
Maximum Supply Voltages
(VB+) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-0.5V to 7V
(VB+) - (VB-). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40V
Relay Drive Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . .-0.5V to 15V
Operating Conditions
Operating Temperature Range
HC-5524-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0oC to TA to 75oC
HC-5524-9 . . . . . . . . . . . . . . . . . . . . . . . . . . -40oC to TA to 85oC
Relay Driver Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5V to 12V
Positive Power Supply (VB+) . . . . . . . . . . . . . . . . . . . . . . . . 5V ±5%
Negative Power Supply (VB-). . . . . . . . . . . . . . . . . . . . -20V to -28V
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operationofthe
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. θJA is measured with the component mounted on an evaluation PC board in free air.
Thermal Resistance (Typical, Note 2) θJA (oC/W)
PLCC Package. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Maximum Junction Temperature (Plastic Package). . . . . . . . 150oC
Maximum Storage Temperature Range. . . . . . -65oC to TA to 150oC
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . 300oC
(PLCC and SOIC - Lead Tips Only)
Die Characteristics
Transistor Count. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 224
Diode Count. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Die Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . .174 mils x 120 mils
Substrate Potential. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Connected
Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Bipolar-DI
Electrical Specifications Typical Parameters are at T
Over Operating Positive and Negative Battery Voltages and Over the Operating Temperature Range. All
Parameters are Specified at 600W 2-Wire Terminating Impedance, Unless Otherwise Specified
PARAMETER TEST CONDITIONS MIN TYP MAX UNITS
AC TRANSMISSION PARAMETERS
RX Input Impedance 300Hz to 3.4kHz, (Note 3) - 100 - kΩ
TX Output Impedance --20Ω
4-Wire Input Overload Level 300Hz to 3.4kHz, 600Ω Reference +1.0 - - V
2-Wire Return Loss Matched for 600Ω, (Note 3)
SRL LO 26 35 - dB
ERL 30 40 - dB
SRL HI 30 40 - dB
2-Wire Longitudinal to Metallic Balance Off Hook Per ANSI/IEEE STD 455-1976,
4-Wire Longitudinal Balance Off Hook Per ANSI/IEEE STD 455-1976,
Low Frequency Longitudinal Balance R.E.A. Test Circuit - -80 -67 dBmp
Longitudinal Current Capability I
Insertion Loss
2-Wire/4-Wire -1.58dBm at 1kHz, Referenced 600Ω - ±0.05 ±0.2 dB
4-Wire/2-Wire 0dBm at 1kHz, Referenced 600Ω - ±0.05 ±0.2 dB
4-Wire/4-Wire -1.58dBm at 1kHz, Referenced 600Ω --±0.2 dB
Frequency Response 300Hzto 3400Hz, Referencedto Absolute Levelat
Level Linearity
2-Wire to 4-Wire and 4-Wire to 2-Wire
= 25oC, VB+ = 5V, VB- = -24V, AG = DG = BG = 0V. Min-Max Parameters are
A
PEAK
58 63 - dB
300Hz to 3400Hz, (Note 3)
50 55 - dB
300Hz to 3400Hz, (Note 3)
I
= 40mA, TA = 25oC (Note 3) - 10 23 dBrnC
LINE
= 40mA, TA = 25oC (Note 3) - - 40 mA
LINE
- ±0.02 ±0.06 dB
1kHz, 0dBm Referenced 600Ω (Note 3)
Referenced to -10dBm, (Note 3)
+3 to -40dBm - - ±0.08 dB
-40 to -50dBm - - ±0.12 dB
-50 to -55dBm - - ±0.3 dB
RMS
2
HC-5524
Electrical Specifications Typical Parameters are at T
= 25oC, VB+ = 5V, VB- = -24V, AG = DG = BG = 0V. Min-Max Parameters are
A
Over Operating Positive and Negative Battery Voltages and Over the Operating Temperature Range. All
Parameters are Specified at 600W 2-Wire Terminating Impedance, Unless Otherwise Specified (Continued)
PARAMETER TEST CONDITIONS MIN TYP MAX UNITS
Absolute Delay (Note 2)
2-Wire/4-Wire 300Hz to 3400Hz - - 1 µs
4-Wire/2-Wire 300Hz to 3400Hz - - 1 µs
4-Wire/4-Wire 300Hz to 3400Hz - 0.95 1.5 µs
Total Harmonic Distortion
2-Wire/4-Wire, 4-Wire/2-Wire, 4-Wire/4-Wire
Reference Level 0dBm at 600Ω,
300Hz to 3400Hz (Note 3)
- - -50 dB
Idle Channel Noise
2-Wire and 4-Wire
C-Message, (Note 3) - - 5 dBrnC
Psophometric - - -85 dBmp
3kHz Flat - - 16 dBrn
Open Loop Voltage (V
TIP
- V
)V
RING
+ = 5V, VB- = -24V - 15.8 - V
B
Power Supply Rejection Ratio
VB+ to 2-Wire 30Hz to 200Hz, RL = 600Ω, (Note 3) 20 40 - dB
VB+ to 4-Wire 20 40 - dB
VB- to 2-Wire 20 40 - dB
VB- to 4-Wire 20 50 - dB
VB+ to 2-Wire 200Hz to 16kHz, RL = 600Ω 30 40 - dB
VB+ to 4-Wire 20 28 - dB
VB- to 2-Wire 20 50 - dB
VB- to 4-Wire 20 50 - dB
Ring Sync Pulse Width 50 - 500 µs
DC PARAMETERS
Loop Current Programming
Limit Range 20 - 60 mA
Accuracy 10 - - %
Loop Current During Power Denial RL = 200Ω - ±4 ±7mA
Fault Currents
TIP to Ground -30-mA
RING to Ground - 120 - mA
TIP and RING to Ground - 150 - mA
Switch Hook Detection Threshold -1215mA
Ground Key Detection Threshold -10-mA
Thermal ALM Output Safe Operating Die Temperature Exceeded 140 - 160
Ring Trip Detection Threshold V
RING
= 105V
RMS
, f
= 20Hz - 10 - mA
RING
o
C
Ring Trip Detection Period - 100 150 ms
Dial Pulse Distortion - 0.1 0.5 ms
Relay Driver Outputs
On Voltage V
OL
IOL (PR) = 60mA, IOL (RD) = 30mA - 0.2 0.5 V
Off Leakage Current VOH = 13.2V - ±10 ±100 µA
TTL/CMOS Logic Inputs (F0, F1, RS, TST, PRI)
Logic ‘0’ V
Logic ‘1’ V
IL
IH
- - 0.8 V
2.0 - 5.5 V
Input Current (F0, F1, RS, TST, PRI) 0V ≤ VIN≤ 5V - - ±100 µA
Logic Outputs
Logic ‘0’ V
Logic ‘1’ V
OL
OH
I
= 800µA - 0.1 0.5 V
LOAD
I
= 40µA 2.7 - - V
LOAD
3
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