SGS Thomson Microelectronics STLC5445 Datasheet

QUAD LINE FEED CONTROLLER

■ BATTERY VOLTAGE UP TO 120V

■ SUPPLIES POWE R FOR UP TO FOUR

DIGITAL TELEPHONE LINES

■ PROGRAMMABLE CURRENT LIMITING

■ LONGITUDINAL CURRENT CANCELLATION

■ ETSI ETR80 COMPL IAN T

■ OUTPUT CURRENT UP TO 140 mA

■ STATUS CONDITION DETECTION FOR

EACH LINE

■ AUTOMATIC THERMAL PROTECTION

■ AUTO POWER ON SEQUENCE

■ OUTPUT STAGE OPTIMIZED FOR MINIMAL

OUTPUT OVERVOLTAGE PROTECTION

■ TWO EXTERNAL RELAY DRIVERS PER LINE

■ PARALLEL OR MPI CONTROL INTERFACE

■ HI-QUAD PACKAGE 64 PIN

DESCRIPTION

The QUAD LINE FEED CONTROLLER provides a power source for up to four U line interfaces. The power source to the device is a local battery or a centralized regulated power supply. Each powered line is individually controll ed and monitored by the device interface.

A MPI or a simple parallel interface can be selected

STLC5445

HiQUAD-64

ORDERING NUM BER: STLC 5445

by a pin strap. Each line can be individually powered and monitored:

therefore overload and faults can easi ly be detected and localized even in a large system. The status conditions detected by the device are: Current Overload, Thermal Overload, Open Loop. If activated (by means of a dedicated pin strap), a self generated power on sequence avoids the thermal over stress when a simultaneous power on has been r equested for more than one channel. The current limiting value can globally be programmed for the four channels by means of an external resistor. The device has two integrated relay drivers per line to drive the test relays of the ISDN system.

October 2002

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STLC5445

BLOCK DIAGRAM

ILIM

110°C

PSC

PBIT

CKILC

RESETN

INTN

ALE

ES0 (A0)

ES1 (CSN)

ES2 (RDN)

ES3 (WRN) NACK0 (D0) NACK1 (D1) NACK2 (D2) NACK3 (D3)

Reference & biasing

generation

Thermal

monitoring

130°C

160°C

Logic

interface

Limiting current reference

Voltage

and current biasing

COD

OLD

Channel 3

Channel 2

Channe l 1

Channel 0

On / Off

line current

control

COD & OLD

generation

WBP0

WB0

WA0

BAT

CODC0

VCC

BGND

EREL3B

DGND

EREL3A EREL2B

RGND

VBAT

BAT

EREL2A EREL1B EREL1A EREL0B EREL0A

I / O conne ctions on channels 1, 2 and 3 are similar to those shown for channel 0 but have been omitted for clarity

reasons.

Relay driver 3B

Relay driver 3A

Relay driver 2B

Relay driver 2A

Relay driver 1B

Relay driver 1A

Relay driver 0B

Relay driver 0A

Driving

output

clamping

REL3B REL3A REL2B REL2A REL1B REL1A REL0B REL0A

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STLC5445

PIN CONNECTION

NACK0(D0) NACK1(D1)

*EREL0A *EREL0B

*EREL1A *EREL1B

(Top view)

CODC0 CODC1

RGND

CK_ILC

REL0A

REL0B REL1A

REL1B

ALE

PBIT

PSC

INTN

BGND

N.C.

WA0

BGND

1 2 3 4 5 6 7 8 9

12 13 14

15 16 17 18

19 20

21 22 23 24 25

VBAT

WB0

WBP0

RGND

59 58 57 56 55 54 53

VBAT

WB3

WBP3

ILIM

N.C.

271128 29 30 31 32

WA3

52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33

N.C. BGND *RESET NACK3(D3) NACK2(D2) REL3B *EREL3B *EREL3A REL3A REL2B *EREL2B *EREL2A REL2A *ES3(WR) *ES2(RD) *ES1(CS) *ES0(A0) RGND CODC3 CODC2

N.C.

WA1

*INTERNAL PULL DOWN TO GROUND

WBP1

WB1

VBAT

WB2

WBP2

DGND

WA2

BGND

D99TL437

PIN FUNCTION

N° Pin Name Description

1 CODC0 Pin for connection of the external capacitor (100nF/6.3V) to GND for COD signal filtering on

channel 0.

2 CODC1 Pin for connection of the external capacitor (100nF/6.3V) to GND for COD signal filtering on

channel 1 4 CKILC External clock input pin for the internal power on sequencer 5 NACK0(D0) Logic pin: with PSC = 0, Line 0 status information output

6 NACK1(D1) Logic pin: with PSC = 0, Line 1 status information output

7 REL0A Output of the 0A relay driver 8 *EREL0A Logic input pin: relay 0A output driver’s ON/OFF (high = ON) 9 *EREL0B Logic input pin: relay 0B output driver’s ON/OFF (high = ON)

10 REL0B Output of the 0B relay driver

with PSC = 1, Line 0 I/O tristate data bus

with PSC = 1, Line 1 I/O tristate data bus

11 REL1A Output of the 1A relay driver

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STLC5445

PIN FUNCTION

N° Pin Name Description

12 *EREL1A Logic input pin: relay 1A output driver’s ON/OFF (high = ON) 13 *EREL1B Logic input pin: relay 1B output driver’s ON/OFF (high = ON) 14 REL1B Output of the 1B relay driver 15 ALE Logic input pin: with PSC = 0, Don’t care

16 PBIT Power on sequencer enable: PBIT = 0: power on sequencer ON

17 PSC Parallel or MPI mode input selection pin:

18 INTN Logic output pin; open drain: with PSC = 0 high impedance

21 WA1 Output feeder’s switch side of line 1; negative respect to WB1 23 VCC Positive supply voltage. It is referred to DGND 24 WBP1 Internal protection diodes for line 1 25 WB1 Output feeder’s resistive side of line 1; positive respect to WA1 28 WB2 Output feeder’s resistive side of line 2; positive respect to WA2

(continued)

with PSC = 1, Address Latch Enable (active high)

PBIT = 1: power on sequencer OFF

0 = parallel interface; 1 = MPI interface

with PSC = 1 interrupt (active low)

29 WBP2 Internal protection diodes for line 2 30 DGND Digital ground 31 WA2 Output feeder’s switch side of line 2; negative respect to WB2 33 CODC2 Pin for connection of the external capacitor (100nF/6.3V) to GND for COD signal filtering on

channel 2

34 CODC3 Pin for connection of the external capacitor (100nF/6.3V) to GND for COD signal filtering on

channel 3

36 *ES0(A0) Logic input pin: with PSC = 0, Line 0 ON/OFF request (high=ON)

37 *ES1(CSN) Logic input pin: with PSC = 0, Line 1 ON/OFF request (high=ON)

38 *ES2(RDN) Logic input pin: with PSC = 0, Line 2 ON/OFF request (high=ON)

39 *ES3(WRN) Logic input pin: with PSC = 0, Line 3 ON/OFF request (high=ON)

40 REL2A Output of the 2A relay driver 41 *EREL2A Logic input pin: relay 2A output driver’s ON/OFF (high = ON) 42 *ERL2B Logic input pin: relay 2B output driver’s ON/OFF (high = ON) 43 REL2B Output of the 2B relay driver

with PSC = 1, Address bit for R/W operations

with PSC = 1, chip select (active low)

with PSC = 1, Read command (active low)

with PSC = 1, Write command (active low)

44 REL3A Output of the 3A relay driver

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STLC5445

PIN FUNCTION

N° Pin Name Description

45 *EREL3A Logic input pin: relay 3A output driver’s ON/OFF (high = ON) 46 *ERL3B Logic input pin: relay 3B output driver’s ON/OFF (high = ON) 47 REL3B Output of the 3B relay driver 48 NACK2 (D2) Logic pin: with PSC = 0, Line 2 status information output

49 NACK3 (D3) Logic pin: with PSC = 0 line 3 status information output

50 *RESETN Logic input pin: reset (active low) 53 WA3 Output feeder’s switch side of line 3; negative respect toWB3 55 ILIM Current limit programming input 56 WBP3 Internal protection diodes for line 3 57 WB3 Output feeder’s resistive side of line 3; positive respect to WA3 60 WB0 Output feeder’s resistive side of line 0; positive respect to WA0 61 WBP0 Internal protection diodes for line 0

0 WA0 Output feeder’s switch side of line 0; negative respect to WB0

(continued)

with PSC = 1, Line 2 I/O tristate data bus

with PSC = 1 line 3 I/O tristate data bus

26 27 58 59

19 32 51 64

35 62

* Internal pull down to ground

VBAT Negative battery supply voltage. It is referred to BGND

BGND Battery ground

RGND Relay ground

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STLC5445

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V V V V

WBn

NEG

stg

Voltage from digital input to DGND – 0.5 to VCC + 0.5 V Voltage from VCC to DGND – 0.4 to +7 V Voltage from VBAT to BGND – 143 to + 0.4 V Voltage from BGND to DGND – 3 to +0.5 V AC Current into the WBn outputs

(WBPn not connected to GND

250 mA

peak Negative current injected in the WAn outputs (-40 to +85°C) 50 mA Storage temperature – 60 to 150 °C

RECOMMENDED OPERATING CONDITION

Symbol Parameter Test Condition Min. Typ. Max. Unit

VCC supply voltage 4.75 5.25 V

BAT

supply voltage – 120 – 38 V

BAT

BGND/DGND voltage – 3 0.5 V

(1)

Programmable range of the current limiting function

20 140 mA

LIMT

BGND

Relay

a normal

Relay driver current 70 mA Ambient temperature normal

range

a extend ed

Ambient temperature extended range

Max operating loop current 140 mA External, short circuit resistive

MIN

loop

load from WAn to WBn

070°C

– 40 85 °C

55 W

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STLC5445

ELECTRICAL CHARACTERISTCS

Unless otherwise specified the below listed parameters' values are referred to the following conditions: V

= –115V, VCC = 5V, R

BAT

range [0°C to 70°C]. The presence of an asterisk mark (*) indicates that the marked parameter must remain within the specified tolerance in the extended temperature range [-40°C to 85°C].

Symbol Parameter Test Condition Min. Typ. Max. Unit

= 53.6 kW, CODCn RC series = 100nF ±10% and 510Ω ±1%, normal temperature

lim

VBAT

LIMT

LIMTL

LIM%

∆R

Vcc

j110

VCC supply current All the switches on Νo load 2.5 mA V

supply current All the switches on Νo load 1.5 1.8 mA

BAT

Current limiting value with

= 0 42.5 50 57.5 mA

long

transversal line current only Current limiting value with added

See Fig.1 37.5 50 62.5 mA

longitudinal line current Current limiting accuracy in the

range 20 to 140 mA

(1)

= 0 ±15 %

long

Leakage current of each WAn output to ground with output driver disabled

Resistance from WAn to V

BAT

Resistance from WBn to

IWA = 30mA 3.15 5.5 7.85 Ω

IWB = 30mA 3.5 5.5 7.5 Ω

BGND Absolute value of the difference

OUT

between R R

WBn

and its related

WAn

110°C thermal monitoring

IWA = IWB = =30mA 0.7

110 °C

threshold

50* µA

Ω

1(*)

j130

j160

hyst

out

Rel33

Rel70

Rleak

130°C thermal monitoring

130 °C

threshold 160°C thermal monitoring

160 °C

threshold Thermal monitoring

10 °C

hysteresis

(2)

Longitudinal output component of

See Fig. 2 – 60 dBV

the fCKILC clock signal Relay drivers’ output voltage All the relay drivers activated at a

load current of 33mA.

(3)

Relay drivers output voltage All the relay drivers activated at a

load current of 70mA.

(3)

Relay driver leakage current ERLn = Low 100 µA

0.5 V

1.2 V

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