Datasheet HC5503T Datasheet (Intersil Corporation)

HC5503T

Data Sheet June 1998 File Number 4506

Balanced PBX/Key System SLIC,
Subscriber Line Interface Circuit

The Intersil HC5503T is a low cost Subscriber Line Interface
Circuit (SLIC) that replaces the components of a discrete
Transf ormer Analog circuit design. The monolithic integrated
design provides improved performance and system reliability .

The HC5503T provides: Current limited DC feed to the
subscriber loop, maintains a flat frequency response over the
voice band and beyond, has self resetting thermal protection
that allows conversation to continue while the fault is
present, provides a TTL subscriber off hook indication even
in the presence of longitudinal currents, and limits system
power consumption on short loops.

The HC5503T provides balanced 2-wire transmission and
has excellent longitudinal balance, while providing on hook
transmission and longitudinal current rejection in both the
on-hook or off-hook conditions.

The SLIC needs only one +5V supply in addition to the main
battery supply for loop current and operates over a range of
battery voltages (-24V to -58V).

Available in 22PDIP AND 24SO packaging. The HC5503T is
ideally suited as a replacement for discrete line circuits in
low cost analog PABXs, small Office/Home Office products
or Small Key Systems.

Features

• Monolithic Integrated Device

• Controlled Supply of BatteryFeedCurrent forShort Loops
(30mA)

• Single +5V Supply

• Allows Interfacing With All Ringing Systems

• Switch Hook Detection

• Compatible With Worldwide PBX Performance
Requirements

• Low Power Consumption During Standby

Applications

• PBX Switches (Analog, Digital or ISDN)

• Key Telephone Systems (KTS)

• ISDN PC Plug in Modems

• ISDN Small Office / Home Office (SOHO) Terminal
Adapters (TA)

• CTI (Computer Telephony Integration) Products

Ordering Information

TEMP.

PART NUMBER

HC5503TCP 0 to 75 22 Ld PDIP E22.4
HC5503TCB 0 to 75 24 Ld SOIC M24.3

RANGE (oC) PACKAGE PKG. NO.

Block Diagram

BGND

TF

RF

V

BAT

50

LOOP FEED

LOOP DETECTOR

RS

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

TIP

RING

SPEECH CIRCUIT

BIAS

V

CC

AGND

http://www.intersil.com or 407-727-9207 | Copyright © Intersil Corporation 1999

C1

TX

RX

SHD

DGND

HC5503T

Absolute Maximum Ratings (Note 1) Thermal Information

Maximum Continuous Supply Voltages

(V

). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -60 to 0.5V

BAT

(VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5 to 7V

(VCC - V

Relay Drive Voltage (VRD). . . . . . . . . . . . . . . . . . . . . . . . -0.5 to 15V

) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75V

BAT

Operating Conditions

Temperature Range

HC-5503T-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0oC to 75oC

Positive Supply Voltage (VCC). . . . . . . . . . . . . . . . . . 4.75Vto 5.25V

Negative Supply Voltage (V

High Level Logic Input Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . 2.4V

Low Level Logic Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . 0.6V

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.

) . . . . . . . . . . . . . . . . . .-24V to -58V

BAT

Thermal Resistance (Typical, Note 2) θJA (oC/W)

PDIP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Maximum Junction Temperature (Plastic Package). . . . . . . . .150oC

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

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

(SOIC - Lead Tips Only)

Die Characteristics

Transistor Count. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .185

Diode Count. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

Die Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137 x 102

Substrate Potential. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Connected

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

Electrical Specifications Unless Otherwise Specified, V

TA = 25oC. Min-Max Parameters are Over Operating Temperature Range

PARAMETER CONDITIONS MIN TYP MAX UNITS

Off Hook IB+R
Off Hook IB-R
Off Hook Loop Current RL = 1200Ω -21-mA
Off Hook Loop Current RL = 1200Ω, V
Off Hook Loop Current RL = 200Ω 25.5 30 34.5 mA
Switch Hook Detection Threshold SHD = V

Dial Pulse Distortion 0-5µs
Longitudinal Balance 1V

2-Wire Off Hook -65-dB
2-Wire On Hook -63-dB
Tip and Ring to TX, Off Hook -58-dB

Insertion Loss At 1kHz, 0dBm Input Level, Referenced 600Ω

2-Wire to TX, RX to 2-Wire

= 600Ω, TA = 25oC - - 5.3 mA

L

= 600Ω - - 39 mA

L

OL

SHD = V

0oC ≤ TA≤ 75oC

OH

200Hz - 3400Hz, (Note 3) IEEE Method

RMS

= -48V, VCC = 5V, AG = BG = DG = 0V, Typical Parameters

BAT

= -42V, TA = 25oC 17.5 - - mA

BAT

10 - - mA

--5mA

- ±0.05 ±0.2 dB

Frequency Response 200 -3400Hz Referenced to Absolute Loss at1kHz and

0dBm Signal Level (Note 3)

Idle Channel Noise (Note 3)

2-Wire to TX, RX to 2-Wire

Trans Hybrid Loss
RX to TX

Overload Level, 2-Wire to TX, RX to 2-Wire VCC = +5V, (Note 3) 2.5 - - V

Balance Network Set Up for 600Ω Termination at 1kHz - 40 - dB

- ±0.02 ±0.05 dB

- 1 5 dBrnC

- -89 -85 dBm0p

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Peak

HC5503T

Electrical Specifications Unless Otherwise Specified, V

= -48V, VCC = 5V, AG = BG = DG = 0V, Typical Parameters

BAT

TA = 25oC. Min-Max Parameters are Over Operating Temperature Range (Continued)

PARAMETER CONDITIONS MIN TYP MAX UNITS

Level Linearity
2-Wire to TX, RX to 2-Wire

At 1kHz, (Note 3) Referenced to 0dBm Level
+3 to -40dBm - - ±0.05 dB

-40 to -50dBm - - ±0.1 dB

-50 to -55dBm - - ±0.3 dB

Power Supply Rejection Ratio (Note 3)

VCC to 2-Wire 200 - 3400kHz, RL = 600Ω -40-dB
VCC to Transmit -40-dB
V

to 2-Wire -40-dB

BAT

V

to Transmit -40-dB

BAT

Logic Input Current (RS, RC) 0V ≤ VIN≤ 5V - - ±100 µA
Logic Inputs (RS, RC)

Logic ‘0’ V
Logic ‘1’ V

IL

IH

- - 0.8 V

2.0 - 5.5 V

Logic Output (SHD)

Logic ‘0’ V
Logic ‘1’ V

OL

OH

I

800µA, VCC = 5V - 0.1 0.5 V

LOAD

I

40µA, VCC = 5V 2.7 - 5.0 V

LOAD

NOTES:

3. These parameters are controlled by design or process parameters and are not directly tested. These parameters are characterized upon initial
design release, upon design changes which would affect these characteristics, and at intervals to assure product quality and specification com­pliance.

Pinouts

TIP

RING

V

CC

C1

DGND

RS

N/C

TF

RF

V

BAT

BGND

10
11

1
2
3
4
5
6
7
8
9

HC5503T

(PDIP)

TOP VIEW

HC5503T

(SOIC)

TOP VIEW

22

TX
AGND

21

N/C

20
19

RX
T3

18
17

T2

16

T1
N/C

15
14

N/C

13

N/C

12

SHD

TIP

RING

V

CC

N/C

C1

DGND

RS

N/C

TF

RF

V

BAT

BGND

24

1
2
3
4
5
6
7
8

9
10
11
12

TX

23

AGND

22

N/C

21

RX
T3

20
19

T2

18

T1

17

N/C

16

N/C

15

N/C

14

N/C

13

SHD

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Pin Descriptions

HC5503T

22 PIN

PDIP

1 1 TIP An analoginput connected tothe TIP (more positive)side ofthe subscriber loop througha 150Ω feedresistor.

2 2 RING An analog input connected to the RING (more negative) side of the subscriber loop through a 150Ω feed re-

33VCCPositive Voltage Source - Most positive supply. VCC is typically 5V.

45C1Capacitor - An external capacitor to be connected between this terminal and analog ground. Required for

5 6 DGND Digital Ground - To be connected to zero potential and servesas a reference for all digital inputs and outputs

6 7 RS This pin should be tied to 5V.
7 8 N/C No Connect. For proper operation this pin should be left floating.
8 9 TF TipFeed-Alowimpedance analog output connected to the TIP terminal through a 150Ω feed resistor. Pro-

9 10 RF Ring Feed - A low impedance analog output connected to the RING terminal through a 150Ω feed resistor.

10 11 V

11 12 BGND Battery Ground - To be connected to zero potential. All loop current and some quiescent current flows into

12 13 SHD Switch Hook Detection-Alowactive LS TTL - compatible logic output. This output is enabled for loop cur-

13 14 N/C No Connect. For proper operation this pin should be left floating.

14 16 N/C No Connect. For proper operation this pin should be left floating.
15 17 N/C No Connect. For proper operation this pin should be left floating.
16 18 T1 Used during production testing. For proper operation this pin should be connected to pin T2.
17 19 T2 Used during production testing. For proper operation this pin should be connected to pin T1.
18 20 T3 Used during production testing. For proper operation this pin should be connected to Analog Ground pin

19 21 RX ReceiveInput - A high impedance analog input which is internally biased. Capacitive coupling to this input is

20 22 N/C No Connect. For proper operation this pin should be left floating.
21 23 AGND Analog Ground - To be connected to zero potential and serves as a reference for the transmit output (TX)

22 24 TX Transmit Output - A low impedance analog output which represents the differential voltage across Tip and

NOTE: All grounds (AGND,BGND, and DGND) must be applied before VCCor V
a user wishes to run separate grounds off a line card, the AG must be applied first.

24 PIN

SOIC SYMBOL DESCRIPTION

Functions with the Ring terminal to receive voice signals from the telephone and for loop
monitoring purposes.

sistor. Functions with the Tip terminal to receive voice signals from the telephone and for loop monitoring
purposes.

4 N/C No Connect. For proper operation this pin should be left floating.

proper operation of the voice band hybrid. Typical value is 0.3µF, 30V.

on the SLIC microcircuit.

vides voice signals to the telephone set and sink longitudinal current.

Functions with the TF terminal to provide loop current, feed voice signals to the telephone set, and sink lon­gitudinal current.

Negative Voltage Source - Most negative supply. V

BAT

Frequently referred to as “battery”.

this ground terminal.

rents exceeding 10mA and disabled for loop currents less than 5mA.

15 N/C No Connect. For proper operation this pin should be left floating.

AGND.

required. AC signals appearing at this input differentially drive the Tip feed and Ring feed terminals, which in
turn drive tip and ring through 300Ω of feed resistance on each side of the line.

and receive input (RX) terminals.

Ring. This output is unbalanced and referenced to analog ground. Since the DC level of this output varies
with loop current, capacitive coupling to the next stage is essential.

BAT

has an operational range of -24V to -58V.

BAT

. Failure to do so may result in premature failure of the part. If

53

Applications Diagram

TIP

PRIMARY

SUBSCRIBER

PROTECTION

LOOP

RING

HC5503T

SYSTEM CONTROLLER

13

5V

7

R

K

1A

B1

(NOTE 4)

K

PTC

1A

1

R

B2

9

V

BAT

10

R

B4

2

R

B3

SHD

RS

TIP
TIP FEED

RING FEED

RING

V

BAT

11 12 6 23

-48V

SLIC

HC5503T

BGND DGND AGND

C

2

TX

RX

T3

T2

T1

C1

V

CC

C

3

V

CC

C

5

24

C

4

21

20

19

18

5

C

1

3

Z

1

-48V

FIGURE 1. TYPICAL LINE CIRCUIT APPLICATION WITH THE MONOLITHIC SLIC

Typical Component Values

C

= 0.3µF, 30V, ±20%

1

= 0.01µF, 100V,±20%

C

2

= 0.01µF, 20V, ±20%

C

3

NOTES:

4. Secondary protection diode bridge recommended is a 2A, 200V type.

5. All grounds (AG, BG, and DG) must be applied before VCCor V
to run separate grounds off a line card, the AG must be applied first.

6. Application shows Ring Injected Ringing.

BAT

PIN NUMBERS GIVEN FOR SOIC PACKAGE.

RING GENERATOR

= 0.5µF, 20V, ±20%

C

4

C5 = 0.5µF, 30V, ±20%

= RB2 = RB3 = RB4 = 150Ω

R

B1

PTC used as ring generator ballast.

. Failureto do so mayresult in premature failureof the part. If a user wishes

All Intersil semiconductor products are manufactured, assembled and tested under ISO9000 quality systems certification.

Intersil semiconductor products are sold by description only.Intersil Corporation reserves the right to make changes in circuit design and/or specifications at any time with­out notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and
reliable. Howev er, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.

For information regarding Intersil Corporation and its products, see web site http://www.intersil.com

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