Intersil Corporation HC55185 Datasheet

HC55185

Data Sheet April 2000

VoIP Ringing SLIC Family

The RSLIC-VoIP family of ringing subscriber line interface circuits (RSLIC) supports analog Plain Old

TelephoneService (POTS) in short and medium loop length, wireless and wireline applications. Ideally suited for remote subscriber units, this family of products offers ﬂexibility to designers with high ringing voltage and low power consumption system requirements.

The RSLIC-VoIP family operates to 100V which translates directly to the amount of ringing voltage supplied to the end subscriber. With the high operating voltage, subscriber loop lengths can be extended to 500Ω (i.e., 5,000 feet) and beyond.

Other key features across the product family include: low power consumption, ringing using sinusoidal or trapezoidal waveforms, robust auto-detection mechanisms for when subscribers go on or off hook, and minimal external discrete application components. Integrated test access features are also offered on selected products to support loopback testing as well as line measurement tests.

There are ﬁve product offerings of the HC55185 with each version providing voltage grades of high battery voltage and longitudinal balance. The voltage feed ampliﬁer design uses low ﬁxed loop gains to achievehigh analog performance with low susceptibility to system induced noise.

File Number 4831.2

Features

• Onboard Ringing Generation

• Compatible with Existing HC5518x Devices

• Low Standby Power Consumption (75V, 65mW)

• Reduced Idle Channel Noise

• Programmable Transient Current Limit

• Improved Off Hook Software Interface

• Integrated MTU DC Characteristics

• Low External Component Count

• Silent Polarity Reversal

• Pulse Metering and On Hook Transmission

• Tip Open Ground Start Operation

• Thermal Shutdown with Alarm Indicator

• 28 Lead Surface Mount Packaging

• Dielectric Isolated (DI) High Voltage Design

Applications

• Voice Over Internet Protocol (VoIP)

• Cable Modems

• Voice Over DSL (VoDSL)

• Short Loop Access Platforms

• Remote Subscriber Units

• Terminal Adapters

Related Literature

• AN9814, User’s Guide for Development Board

• AN9824, Modeling of the AC Loop

• Interfacing to DSP CODECs (Contact Factory)

Block Diagram

POL CDC VBHVBL

ILIM

TIP

RING

SW+

SW-

4-1

CONTROL

2-WIRE

PORT

TRANSIENT

CURRENT

LIMIT

TEST

ACCESS

BATTERY

SWITCH

TRANSMIT

SENSING

DETECTOR

LOGIC

RTD DETALM

RD E0

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

RINGING

PORT

4-WIRE

PORT

CONTROL

LOGIC

BSEL

VRS

VRX VTX

-IN VFB

F2 F1 F0

SWC

RSLIC18™ is a trademark of Intersil Corporation.

HC55185

Ordering Information (PLCC Package Only)

PART NUMBER HIGH BATTERY (VBH)

LONGITUDINAL

BALANCE

FULL TEST

TEMP.

RANGEoC PACKAGE

PACKAGE

NO.

100V 85V 75V 58dB 53dB

HC55185AIM •••-40 to 85 28 Ld PLCC N28.45 HC55185BIM •• •-40 to 85 28 Ld PLCC N28.45 HC55185CIM •••-40 to 85 28 Ld PLCC N28.45 HC55185DIM •••-40 to 85 28 Ld PLCC N28.45 HC55185ECM •• 0 to 75 28 Ld PLCC N28.45 HC55185FCM •••0 to 85 28 Ld PLCC N28.45 HC5518XEVAL1 Evaluation board platform, including CODEC. Also available in Tape and Reel

Device Operating Modes

MODE F2 F1 F0 E0 = 1 E0 = 0 HC55185A HC55185B HC55185C HC55185D HC55185E HC55185F

Low Power Standby 0 0 0 SHD GKD •••••• Forward Active 0 0 1 SHD GKD •••••• Unused 0 1 0 n/a n/a Reverse Active 0 1 1 SHD GKD •••••• Ringing 1 0 0 RTD RTD •••••• Forward Loop Back 1 0 1 SHD GKD ••• • Tip Open 1 1 0 SHD GKD ••• • Power Denial 1 1 1 n/a n/a ••••••

Device Pinout

SW+

SW-

SWC

F2 F1 F0 E0

HC55185

(PLCC)

TOP VIEW

RING

ILIM

TIP

VBL

VBH

ALM

BGND

AGND

BSEL

RTD

CDC

VCC

23 22

-IN VFB

VTX

VRX

POL

VRS

5 6 7

9 10 11

DET

4-2

HC55185

Absolute Maximum Ratings T

Maximum Supply Voltages

VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to +7V

VCC - VBH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110V

Uncommitted Switch Voltage . . . . . . . . . . . . . . . . . . . . . . . -110V

ESD (Human Body Model). . . . . . . . . . . . . . . . . . . . . . . . . . . . 500V

=25oC Thermal Information

Thermal Resistance (Typical, Note 1) θ

PLCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53oC/W

Maximum Junction Temperature Plastic . . . . . . . . . . . . . . . . 150oC

Maximum Storage Temperature Range. . . . . . . . . . -65oC to 150oC

Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . 300oC

(PLCC - Lead Tips Only)

Operating Conditions

Temperature Range

Commercial (C sufﬁx) . . . . . . . . . . . . . . . . . . . . . . . . . .0oC to 85oC

Industrial (I sufﬁx) . . . . . . . . . . . . . . . . . . . . . . . . . . . -40oC to 85oC

Positive Power Supply (VCC). . . . . . . . . . . . . . . . . . . . . . . +5V,±5%

Low Battery Power Supply (VBL). . . . . . . . . . . . . -16V to -52V, ±5%

High Battery Power Supply (VBH)

AIM, CIM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .VBL to 100V, ±5%

BIM, DIM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VBL to -85V, ±10%

EIM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VBL to -75V, ±10%

Uncommitted Switch (loop back or relay driver). . . . . . +5V to -100V

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. θJA is measured with the component mounted on an evaluation PC board in free air.

Electrical Speciﬁcations Unless Otherwise Speciﬁed, T

(C) grade, VBL= -24V, VBH= -100V, -85V or -75V, VCC= +5V, AGND = BGND = 0V, loop current limit = 25mA. All AC parameters are speciﬁed at 600Ω 2-wire terminating impedance over the frequency band of 300Hz to

3.4kHz. Protection resistors = 0Ω.

PARAMETER TEST CONDITIONS MIN TYP MAX UNITS

RINGING PARAMETERS

VRS Input Impedance (Note 2) 450 - - kΩ Differential Ringing Gain (Note 3) VRS to 2-wire, R Ringing Voltage Total Distortion RL = 1.3 kΩ, V 4-Wire to 2-Wire Ringing Off Isolation Active mode, referenced to VRS input - 90 - dB 2-Wire to 4-Wire Transmit Isolation Ringing mode referenced to the differential ringing

Centering Voltage Accuracy Tip, Referenced to VBH/2 + 0.5 - 2.5 - V

AC TRANSMISSION PARAMETERS

Receive Input Impedance (Note 2) 160 - - kΩ Transmit Output Impedance (Note 2) --1Ω 4-Wire Port Overload Level THD = 1% 3.1 3.5 - V 2-Wire Port Overload Level THD = 1% 3.1 3.5 - V 2-Wire Return Loss 300Hz - 24 - dB

2-Wire Longitudinal Balance (Notes 4, 5) Forward Active, Grade A and B 58 62 - dB

4-Wire Longitudinal Balance Forward Active, Grade A and B 58 67 - dB

= -40oC to 85oC for industrial (I) grade and TA = 0oC to 85oC for commercial

amplitude

Ring, Referenced to VBH/2 + 0.5 - 2.5 - V

1kHz - 40 - dB

3.4kHz - 21 - dB

Forward Active, Grade C, D and E 53 59 - dB

Forward Active, Grade C, D and E 53 64 - dB

Die Characteristics

Substrate Potential. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V

Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bipolar-DI

= ∞ 78 80 82 V/V

LOAD

= |VBH| -5 - - 3.0 %

T-R

-80- dB

PK PK

4-3

HC55185

Electrical Speciﬁcations Unless Otherwise Speciﬁed, T

= -40oC to 85oC for industrial (I) grade and TA = 0oC to 85oC for commercial

3.4kHz. Protection resistors = 0Ω.

PARAMETER TEST CONDITIONS MIN TYP MAX UNITS

2-Wire to 4-Wire Level Linearity 4-Wire to 2-Wire Level Linearity Referenced to -10dBm

+3 to -40dBm, 1kHz - 0.025 - dB

-40 to -50dBm, 1kHz - 0.050 - dB

-50 to -55dBm, 1kHz - 0.100 - dB

Longitudinal Current Capability (Per Wire) (Note 2) Test for False Detect 20 - - mA

Test for False Detect, Low Power Standby 10 - - mA

RMS RMS

4-Wire to 2-Wire Insertion Loss -0.20 0.00 +0.20 dB 2-Wire to 4-Wire Insertion Loss -6.22 -6.02 -5.82 dB 4-Wire to 4-Wire Insertion Loss -6.22 -6.02 -5.82 dB Forward Active Idle Channel Noise (Note 5) 2-Wire C-Message, T = 25oC - 10 13 dBrnC

4-Wire C-Message, T = 25oC - 4 7 dBrnC

Reverse Active Idle Channel Noise (Note 5) 2-Wire C-Message, T = 25oC - 11 14 dBrnC

4-Wire C-Message, T = 25oC - 5 8 dBrnC

DC PARAMETERS

Off Hook Loop Current Limit Programming Accuracy -8.5 - +8.5 %

Programming Range 15 - 45 mA

Off Hook Transient Current Limit Programming Accuracy -10 - +10 %

Programming Range 40 - 100 mA Loop Current During Low Power Standby Forward Polarity Only 18 - 26 mA Open Circuit Voltage

(|Tip - Ring|)

Low Power Standby Open Circuit Voltage (Tip - Ring)

Absolute Open Circuit Voltage VRGin LPS and FA

VBL = -16V - 8.0 - V

VBL = -24V 14 15.5 17 V

VBH > -60V 43 49 - V

VBL = -48V - 44.5 - V

VBH > -60V 43 51.5 - V

- -53 -56 V

DC DC DC DC DC

VTGin RA

VBH > -60V

TEST ACCESS FUNCTIONS

Switch On Voltage IOL = 45mA - 0.30 0.60 V Loopback Max Battery - - 52 V

LOOP DETECTORS AND SUPERVISORY FUNCTIONS

Switch Hook Programming Range 5 - 15 mA Switch Hook Programming Accuracy Assumes 1% External Programming Resistor -10 - +10 % Dial Pulse Distortion --1% Ring Trip Comparator Threshold 2.3 2.45 2.9 V Ring Trip Programming Current Accuracy -10 - +10 % Ground Key Threshold -12-mA Thermal Alarm Output IC Junction Temperature - 175 -

4-4

HC55185

Electrical Speciﬁcations Unless Otherwise Speciﬁed, T

= -40oC to 85oC for industrial (I) grade and TA = 0oC to 85oC for commercial

3.4kHz. Protection resistors = 0Ω.

PARAMETER TEST CONDITIONS MIN TYP MAX UNITS

LOGIC INPUTS (F0, F1, F2, E0, SWC)

Input Low Voltage - - 0.8 V Input High Voltage 2.0 - - V Input Low Current VIL = 0.4V -20 - - µA Input High Current VIH = 2.4V - - 1 µA

LOGIC OUTPUTS (DET, ALM)

Output Low Voltage IOL = 5mA - .15 0.4 V Output High Voltage IOH = 100µA 2.4 3.5 - V

SUPPLY CURRENTS

Low Power Standby, BSEL = 1 I

Forward or Reverse, BSEL = 0 I

Forward, BSEL = 1 I

Ringing, BSEL = 1 I

Forward Loopback, BSEL = 0 I

Tip Open, BSEL = 0 I

Power Denial, BSEL = 0 or 1 I

BH CC

BL CC

BH CC

BL CC

- 3.9 6.0 mA

- 0.66 0.90 mA

- 4.9 6.5 mA

- 1.2 2.5 mA

- 7.0 9.5 mA

- 0.9 2.0 mA

- 2.2 3.0 mA

- 6.4 9.0 mA

- 0.3 1.0 mA

- 2.0 3.0 mA

- 10.3 13.5 mA

- 23.5 32 mA

- 3.8 5.5 mA

- .3 1.0 mA

- 4.0 6.0 mA

- 0.22 0.5 mA

ON HOOK POWER DISSIPATION (Note 6)

Forward or Reverse VBL = -24V - 55 - mW Low Power Standby VBH = -100V - 85 - mW

VBH = -85V - 75 - mW

VBH = -75V - 65 - mW Ringing VBH = -100V - 250 - mW

VBH = -85V - 230 - mW

VBH = -75V - 225 - mW

OFF HOOK POWER DISSIPATION (Note 6)

Forward or Reverse VBL = -24V - 305 - mW

POWER SUPPLY REJECTION RATIO

4-5

HC55185

Electrical Speciﬁcations Unless Otherwise Speciﬁed, T

3.4kHz. Protection resistors = 0Ω.

PARAMETER TEST CONDITIONS MIN TYP MAX UNITS

VCC to 2-Wire f = 300Hz - 40 - dB

VCC to 4-Wire f = 300Hz - 45 - dB

VBL to 2-Wire 300Hz ≤ f ≤ 3.4kHz - 30 - dB VBL to 4-Wire 300Hz ≤ f ≤ 3.4kHz - 35 - dB VBH to 2-Wire 300Hz ≤ f ≤ 3.4kHz - 33 - dB VBH to 4-Wire 300Hz ≤ f ≤ 1kHz - 40 - dB

NOTES:

2. These parameters are controlled via design or process parameters and are not directly tested. These parameters are characterized upon initial design release and upon design changes which would affect these characteristics.

3. Differential Ringing Gain is measured with VRS = 0.795V for -75V devices.

4. Longitudinal Balance is tested per IEEE455-1985, with 368Ω per Tip and Ring terminal.

5. These parameters are tested 100% at room temperature. These parameters are guaranteed not tested across temperature via statistical characterization and design.

6. The power dissipation is basedon actual device measurements and will beless than worst case calculations based ondata sheet supply current limits.

= -40oC to 85oC for industrial (I) grade and TA = 0oC to 85oC for commercial

f = 1kHz - 35 - dB f = 3.4kHz - 28 - dB

f = 1kHz - 43 - dB f = 3.4kHz - 33 - dB

1kHz < f ≤ 3.4kHz - 45 - dB

for -100V devices, VRS = 0.663 V

RMS

for -85V devices and VRS = 0.575V

RMS

Product Family Cross Reference

The followingtable provides an orderingand functional cross reference for the existing HC55180 thru HC55184 products and the new and improved HC55185 product.

TABLE 1. PRODUCT CROSS REFERENCE

EXISTING DEVICES FUNCTIONAL EQUIVALENT

HC55180CIM, HC55180DIM None Offered HC55181AIM, HC55182AIM HC55185AIM HC55181BIM, HC55182BIM HC55185BIM HC55181CIM, HC55182CIM HC55185CIM HC55181DIM, HC55182DIM HC55185DIM HC55183ECM, HC55184ECM HC55185ECM

Any of the HC55185 products may be used without the battery switch function by shorting the supply pins VBL and VBH together. This provides compatibility with HC55180 type applications which do not require the battery switch.

Application Circuit Modiﬁcations

The HC55185 basic application circuit is nearly identical to that of the HC55180 thru HC55184.The HC55185 requires an additional resistor to program the transient current limit

feature. This programming resistor is connected from pin 16 (TL) to ground. In addition some component values have been changed to improve overall device performance. The table below lists the component value changes required for the HC55185 application circuit.

TABLE 2. COMPONENT VALUE CHANGES

REFERENCE HC55180 - 184 HC55185

RS 210kΩ 66.5kΩ RP1 ≥ 35Ω≥ 49Ω RP2 ≥ 35Ω≥ 49Ω CFB 0.47µ 4.7µ

The value of RS is based on a 600Ω termination impedance and RP1 = RP2 = 49.9Ω. Design equations are provided to calculate RS for other combinations of termination and protection resistance.

The CFB capacitor must be non-polarized for proper device operation in Reverse Active. Ceramic surface mount capacitors (1206 body style) are available from Panasonic with a 6.3V voltage rating. These can be used for CFB since it is internally limited to approximately 3V. The CDC capacitor may be either polarized or non polarized.

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