STLC3055(1999) 查看數據表（PDF） - STMicroelectronics

零件编号

产品描述 (功能)

生产厂家

STLC3055
(Rev.:1999)

WLL & ISDN-TA SUBSCRIBER LINE INTERFACE CIRCUIT

STMicroelectronics 

STLC3055

DESCRIPTION (continued)

these applications is the integrated ringing gener-

ator.

The control interface is a parallel type with open

drain output and 3.3V logic levels.

The metering pulses are generated on chip start-

ing from two logic signals (0, 3.3V) one define the

metering pulse frequency and the other the me-

tering pulse duration. An on chip circuit then pro-

vides the proper shaping and filtering. Metering

pulse amplitude and shaping (rising and decay

time) can be programmed by external compo-

nents. A dedicated cancellation circuit avoid pos-

PIN CONNECTION

sible CODEC input saturation due to Metering

pulse echo.

Constant current feed can be set from 20mA to

40mA. Off-hook detection threshold is program-

mable from 5mA to 9mA.

The device, developed in BCD100II technology

(100V process), operates in the extended tem-

perature range and integrates a thermal protec-

tion that sets the device in power down when Tj

exceeds 140°C.

44 43 42 41 40 39 38 37 36 35 34

D0

1

D1

2

D2

3

PD

4

RES

5

N.C.

6

N.C.

7

DET

8

CKTTX

9

CTTX1

10

CTTX2

11

33

CSVR

32

ILTF

31

RD

30

RTH

29

IREF

28

RLIM

27

AGND

26

CVCC

25

VPOS

24

RSENSE

23

GATE

12 13 14 15 16 17 18 19 20 21 22

D97TL279A

ABSOLUTE MAXIMUM RATINGS

Symbol

Vpos

A/BGND

Vdig

Tj

Vbtot (1)

Parameter

Positive Supply Voltage

AGND to BGND

Pin D0, D1, D2, DET, CKTTX

Max. junction Temperature

Vbtot=|Vpos|+|Vbat|. (Total voltage applied to the device

supply pins).

Value

-0.4 to +17

-1 to +1

-0.4 to 5.5

150

100

(1) Vbat is self generated by the on chip DC/DC converter and can be programmed via RF1 and RF2.

RF1 and RF2 shall be selected in order to fulfil the a.m limits (see External Components Table page 10)

Unit

V

V

V

°C

V

2/22

Share Link: