NE5900 データシートの表示（PDF） - Philips Electronics

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NE5900

Call progress decoder

Philips Electronics 

Philips Semiconductors

Call progress decoder

Product specification

NE5900

DESCRIPTION

The NE5900 call progress decoder (CPD) is a low cost, low power

CMOS integrated circuit designed to interface with a

microprocessor-controlled smart telephone capable of making

preprogrammed telephone calls. The call progress decoder

information to permit microprocessor decisions whether to initiate,

continue, or terminate calls. A tri-state, 3-bit output code indicates

the presence of dial tone, audible ring-back, busy signal, or re-order

tones.

A front-end bandpass filter is accomplished with switched

capacitors. The bandshaped signal is detected and the cadence is

measured prior to output decoding. In addition to the three data bits,

a buffered bandpass output and envelope output are available. All

logic inputs and outputs can interface with LSTTL, CMOS and

NMOS.

Circuit features include low power consumption and easy

application. Few and inexpensive external components are

required. A typical application requires a 3.58MHz crystal or clock,

470kΩ resistor, and two bypass capacitors. The NE5900 is effective

where traditional call progress tones, PBX tones, and precision call

progress tones must be correctly interpreted with a single circuit.

FEATURES

• Fully decoded tri-state call progress status output

• Works with traditional, precision, or PBX call progress tones

• Low power consumption

• Low cost 3.58MHz crystal or clock

• No calibration or adjustment

• Interfaces with LSTLL, CMOS, NMOS

• Easy application

ORDERING INFORMATION

DESCRIPTION

16-Pin Plastic Small Outline (SOL) Package

16-Pin Plastic Dual In-Line (DIP) Package

PIN CONFIGURATION

D1 and N Packages

INPUT 1

VREF 2

EXT CLOCK IN/XTAL1 3

XTAL2 4

TEST IN 5

CLEAR IN 6

COUNT IN PROGRESS 7

0V 8

16 5V

15 ANALOG OUT

14 TRI-STATE ENABLE

13 ENVELOPE

12 BIT 1

11 BIT 2

10 BIT 3

9 DATA VALID

NOTE:

TOP VIEW

1. SOL — Released in large SO package only.

Figure 1. Pin Configuration

SR01142

APPLICATIONS

• Modems

• PBXs

• Security equipment

• Auto dialers

• Answering machines

• Remote diagnostics

• Pay telephones

TEMPERATURE RANGE

0 to +70°C

0 to +70°C

ORDER CODE

NE5900DK

NE5900N

DWG #

SOT162-1

SOT38-4

1986 May 8

1

853-0842 83667

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