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

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)

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

http://www.intersil.com or 407-727-9207

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

PEAK

58 63 - dB

300Hz to 3400Hz, (Note 3)

50 55 - dB

300Hz to 3400Hz, (Note 3)

= 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

HC-5524

Electrical Specifications Typical Parameters are at T

= 25oC, VB+ = 5V, VB- = -24V, AG = DG = BG = 0V. Min-Max Parameters are

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

RING

+ = 5V, VB- = -24V - 15.8 - V

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

Ring Trip Detection Period - 100 150 ms Dial Pulse Distortion - 0.1 0.5 ms Relay Driver Outputs

On Voltage V

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

= 800µA - 0.1 0.5 V

LOAD

= 40µA 2.7 - - V

LOAD

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