STLC3055N_09 datasheet, PDF - EEWORLD Datasheet

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STLC3055N_09: DescriptionWLL and ISDN-TA subscriber line interface circuit; File Size275KB，34 Pages; ManufacturerSTMicroelectronics; Websitehttp://www.st.com/

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STLC3055N_09 Overview

WLL and ISDN-TA subscriber line interface circuit

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STLC3055N

WLL and ISDN-TA subscriber line interface circuit

Features

■

Monochip subscriber line interface circuit

(SLIC) optimised for WLL and VoIP

applications

Implement all key features of the BORSHT

function

Single supply (5.5 V to 12 V)

Built in DC/DC converter controller

Soft battery reversal with programmable

transition time.

On-hook transmission.

Programmable off-hook detector threshold

Metering pulse generation and filter

Integrated ringing

Integrated ring trip

Parallel control interface (3.3 V logic level)

Programmable constant current feed

Surface mount package

Integrated thermal protection

Dual gain value option

BCD III S, 90 V technology

-40 to +85 °C operating range

LQFP44

■

generate the negative battery by means of an

on chip DC/DC converter controller that drives an

external MOS switch.

The battery level is properly adjusted depending

on the operating mode. A useful characteristic for

these applications is the integrated ringing

generator.

The control interface is a parallel type with open

drain output and 3.3 V logic levels.

The metering pulses are generated on chip

starting from two logic signals (0 and 3.3 V) one

define the metering pulse frequency and the other

the metering pulse duration. An on chip circuit

then provides the proper shaping and filtering.

Metering pulse amplitude and shaping (rising and

decay time) can be programmed by external

components. A dedicated cancellation circuit

avoid possible codec input saturation due to

metering pulse echo.

Constant current feed can be set from 20 mA to

40 mA. Off-hook detection threshold is

programmable from 5 mA to 9 mA.

The device, developed in BCD III S technology

(90 V process), operates in the extended

temperature range and integrates a thermal

protection that sets the device in power down

when T

exceeds 140 °C.

Description

The STLC3055N is a SLIC device specifically

designed for wireless local loop (WLL) and ISDN-

terminal adaptors (ISDN-TA) and VoIP

applications. One of the distinctive characteristic

of this device is the ability to operate with a single

supply voltage (from 5.5 V to 12 V) and self

Table 1.

Device summary

Order code

E-STLC3055N

(1)

1. ECOPACK® (see

Section 10)

Package

LQFP44

Packing

Tray

February 2009

Rev 11

1/34

www.st.com

Contents

STLC3055N

Contents

Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Electrical specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.1

3.2

3.3

Absolute maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Operating range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

4.1

4.2

DC/DC converter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Operating modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

4.2.1

4.2.2

4.2.3

4.2.4

Power down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

High impedance feeding (HI-Z) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Active . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Ringing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

5.1

5.2

5.3

Layout recommendation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

External components list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Application diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

6.1

Test circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Overvoltage protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Typical state diagram for STLC3055N operation . . . . . . . . . . . . . . . . . 30

STLC3055Q vs STLC3055N compatibility. . . . . . . . . . . . . . . . . . . . . . . 31

9.1

9.2

9.3

Typical power consumption comparison . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Hardware differences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Parameter differences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

2/34

Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

STLC3055N

List of tables

Table 1.

Table 2.

Table 3.

Table 4.

Table 5.

Table 6.

Table 7.

Table 8.

Table 9.

Table 10.

Table 11.

Table 12.

Table 13.

Table 14.

Table 15.

Table 16.

Table 17.

Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Operating range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

SLIC operating modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Gain set in active mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

SLIC states in active mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

CREST factor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

External components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

External components @gain set = 0. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

External components @gain set = 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Power consumption differences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Hardware differences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Parameter differences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

3/34

List of figures

STLC3055N

List of figures

Figure 1.

Figure 2.

Figure 3.

Figure 4.

Figure 5.

Figure 6.

Figure 7.

Figure 8.

Figure 9.

Figure 10.

Figure 11.

Figure 12.

Figure 13.

Figure 14.

Figure 15.

Figure 16.

Figure 17.

Figure 18.

Figure 19.

Figure 20.

Figure 21.

Figure 22.

Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Pin connection (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

DC characteristic in HI-Z mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

DC characteristic in active mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

TIP/RING typical transition from direct to reverse polarity . . . . . . . . . . . . . . . . . . . . . . . . . 12

Metering pulse generation circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

TIP/RING typical ringing waveform. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Application diagram with metering pulse generation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Application diagram without metering pulse generation . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

2W return loss 2WRL = 20Log(|Zref + Zs|/|Zref-Zs|) = 20Log(E/2Vs) . . . . . . . . . . . . . . . . 26

THL trans hybrid loss THL = 20Log|Vrx/Vtx|. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

G24 transmit gain G24 = 20Log|2Vtx/E| . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

G42 receive gain G42 = 20Log|VI/Vrx| . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

PSRRC power supply rejection Vpos to 2W port PSSRC = 20Log|Vn/Vl| . . . . . . . . . . . . . 27

L/T longitudinal to transversal conversion L/T = 20Log|Vcm/Vl| . . . . . . . . . . . . . . . . . . . . . 27

T/L transversal to longitudinal conversion T/L = 20Log|Vrx/Vcm|. . . . . . . . . . . . . . . . . . . . 28

VTTX metering pulse level on line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

V2Wp and W4Wp: idle channel psophometric noise at line and TX.

V2Wp = 20Log|Vl/0.774l|; V4Wp = 20Log|Vtx/0.774l| . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Simplified configuration for indoor overvoltage protection . . . . . . . . . . . . . . . . . . . . . . . . . 29

Standard overvoltage protection configuration for K20 compliance . . . . . . . . . . . . . . . . . . 29

State diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

LQFP44 (10 x 10 x 1.4 mm) mechanical data and package dimensions . . . . . . . . . . . . . . 32

4/34

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