Document
Philips Semiconductors
Product specification
Call progress decoder
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.
PIN CONFIGURATION
D1 and N Packages
INPUT VREF EXT CLOCK IN/XTAL1 XTAL2 TEST IN CLEAR IN COUNT IN PROGRESS 0V 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 5V ANALOG OUT TRI-STATE ENABLE ENVELOPE BIT 1 BIT 2 BIT 3 DATA VALID
TOP VIEW NOTE: 1. SOL — Released in large SO package only.
SR01142
Figure 1. Pin Configuration
APPLICATIONS
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
• 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
Philips Semiconductors
Product specification
Call progress decoder
NE5900
BLOCK DIAGRAM
ANALOG OUT 0V VREF 5V
10kΩ INPUT FILTER DETECTOR
10kΩ
TRI-STATE ENABLE
ENVELOPE
EXT CLOCK IN/XTAL1 TIMING DECODER TRI-STATE
BIT 1
BIT 2
XTAL2
BIT 3
TEST IN
CLEAR IN
COUNT IN PROGRESS
DATA VALID
SR01143
Figure 2. NE5900 Block Diagram
ABSOLUTE MAXIMUM RATINGS
SYMBOL VDD VIN VIN VOUT TSTG TA TSOLD TJMAX Supply voltage Logic control input voltages All other input voltages1 PARAMETER RATING 9 -0.3 to +16 -0.3 to VCC + 0.3 -0.3 to VCC + 0.3 -65 to +150 0 to +70 +300 +150 UNITS V V V V °C °C °C °C
Output voltages Storage temperature range Operating temperature range Lead soldering temperature (10s) Junction temperature
NOTE: 1. Includes Pin 3 — Ext Clock In
1986 May 8
2
.