HT9032 HT9032C/D operating voltage: 3.5V~5.5V Bell V.23 demodulat

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HT9032 HT9032C/D operating voltage: 3.5V~5.5V Bell V.23 demodulat

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Calling Line Identification Receiver
HT9032
HT9032C/D operating voltage: 3.5V~5.5V Bell V.23 demodulation Ring detection input output Carrier detection output
Power down mode High input sensitivity HT9032C: 16-pin DIP/SOP package HT9032D: 8-pin DIP/SOP package
Applications
Feature phones Caller adjunct boxes answering machines
Computer telephony interface products ADSI products
General Description
HT9032 calling line identification receiver power CMOS integrated circuit designed receiving physical layer signals transmitted according Bellcore TR-NWT-000030 ITU-T V.23 specifications. primary application this device products used receive display calling number, message waiting indicator sent subscribers from central office facilities. device also provides carrier detection circuit ring detection circuit easier system applications.
February 2001
HT9032
Block Diagram
ilte
Assignment
February 2001
HT9032
Description
Name Power Inputs PDWN Clock crystal ceramic resonator should connected this This driven from external clock source. crystal ceramic resonator should connected this detects ring energy line through attenuating network enables oscillator ring detection. This schmitt trigger input. couples ring signal precision ring detector through attenuating network. valid ring signal detected. This schmitt trigger input. Power-VDD input power internal logic. Ground-VSS ground connection internal logic. logic this puts chip power down mode. When logic this pin, chip activated. This schmitt trigger input. Description
Ring Detections RDET1 RDET2
RTIME
network connected this order hold voltage below 2.2V between peaks ringing signal. This controls internal power activates partial circuitry needed determine whether incoming ring valid not. input schmitt trigger input. output cell structure NMOS output. This input connected side twisted pair wires. internally biased when device power mode. This must isolated from line. This input connected ring side twisted pair wires. internally biased when device power mode. This must isolated from line. This open drain output goes when valid ringing signal detected. When connected PDWN pin, this used auto power This open drain output goes indicating that valid carrier present line. hysteresis built-in allow momentary drop carrier. When connected PDWN pin, this used auto power This presents output demodulator whenever CDET low. This data stream includes alternate pattern, marking, data. other times, this held high.
Signal Inputs
RING
Detection Results RDET CDET
DOUT
February 2001
HT9032
Name DOUTC Description This output presents output demodulator whenever CDET when internal validation sequence been successfully passed. This data stream does include alternate pattern. This always held high.
Absolute Maximum Ratings
Voltages referenced VSS, except where noted. Supply Voltage.-0.5V 6.0V Operating Temperature Range .0°C 70°C Input Voltages .25mW Storage Temperature Range .-40°C 150°C
Note: These stress ratings only. Stresses exceeding range specified under Maximum cause substantial damage device. Functional operation this device other conditions beyond those listed specification implied prolonged exposure extreme conditions affect device reliability.
D.C. Characteristics
Symbol IDD1 IDD2 Parameter Supply Voltage Supply Current Supply Current Test Conditions Conditions 9032C/D PDWN=0 (3.58MHz PDWN=1 RTIME=0 (3.58MHz internal circuits partially PDWN=1 RTIME=1 (3.58MHz off) IOL=1.6mA IOH=0.8mA RDET1, RTIME, PDWN RDET1, RTIME, PDWN
Crystal=3.58MHz, Ta=0~70°C Min. Typ. Max. Unit
ISTBY VTVT+
Standby Current Input Voltage Logic Input Voltage Logic Output Voltage Logic Output Voltage Logic Input Leakage Current, Inputs Input Threshold Voltage Input High Threshold Voltage
0.8V 0.9V
2.75
0.2V 0.1V
February 2001
HT9032
Symbol Parameter Test Conditions Conditions RDET2 TIP, RING Min. Typ. Max. Unit
VTRDET2 Input Threshold Voltage Input Resistance
February 2001
HT9032
A.C. Characteristics Detection
VSS=0V, Crystal=3.58MHz, Ta=0 70°C, 0dBm=0.7746Vrms 600W Symbol Parameter Input Sensitivity: TIP, RING Signal Noise Ratio Band Pass Filter 60Hz 550Hz 2700Hz 3300Hz Carrier Detect Sensitivity tDOSC tSUPD tDAQ tDCH Oscillator Start Time Power Signal Time Carrier Detect Acquisition Time Data Carrier Detect High Test Conditions Frequency Response Relative 1700Hz 0dBm Conditions Min. Typ. Max. Unit
February 2001
HT9032
Functional Description
HT9032 designed physical layer demodulator products targeted caller market. data signaling interface should conform Bell 202, which described follows:
Analog, phase coherent, frequency shift keying Logical (Mark)=1200+/-12Hz Logical (Space)=2200+/-22Hz Transmission rate=1200bps Data application=serial, binary, Logical (Space)=2100Hz Transmission rate=1200bps
Since band pass filter HT9032 pass V.23 signal, hence HT9032 also demodulate V.23 signal. Ring detection data will transmitted silent period between first second power ring before voice path established. HT9032 should first detect valid ring then perform demodulation. typical ring detection circuit HT9032 depicted below. power ring signal first rectified through bridge circuit then sent resistor network that attenuates incoming power ring. values resistors capacitor given figure have been chosen provide sufficient voltage RDET1 turn Schmitt Trigger input with approximately Vrms greater power ring input from ring. When Schmitt exceeded, NMOS RTIME will driven saturation discharging capacitor RTIME. This will initialize partial power with only portions part involved with ring signal analysis enabled, including RDET2 pin. With RDET2 enabled, portion power ring above 1.2V ring analysis circuit. Once ring signal qualified, RDET will sent low.
asynchronous
interface should arranged allow simple data transmission from terminating central office, (Customer Premises Equipment), only when on-hook state. data will transmitted silent period between first second power ring before voice path established. transmission level from terminating C.O. will -13.5dBm+/-1.0. worst case attenuation through loop expected -20dB. receiver therefore, should have sensitivity approximately -34.5dBm handle worst case installations. ITU-T V.23 also using signaling scheme transmit data general switched telephone network. mode V.23, modulation rate characteristic frequencies listed below:
Analog, phase coherent, frequency shift keying Logical (Mark)=1300Hz
February 2001
HT9032
Operation mode There three operation modes HT9032. They power down mode, partial power mode, power mode. three modes classified following conditions: Modes Power down Partial power Power Conditions <1mA 1.9mA typically 3.2mA typically 1.9mA typically. Once PDWN below VT-, part will fully powered ready receive FSK. During this mode, device current will increase approximately 3.2mA (typ). state RTIME part concerned. After message been received, PDWN allowed return part will return power down mode. Current Consumption
Normally, PDWN RTIME control operation mode HT9032. When both pins HIGH, HT9032 power down mode, consuming less than supply current. When valid power ring arrives, RTIME will driven below VTand portions part involved ring signal analysis enabled. This partial power mode, consuming approximately
Application Circuits
Application circuit
February 2001
HT9032
Application circuit
February 2001
HT9032
Holtek Semiconductor Inc. (Headquarters) No.3 Creation Science-based Industrial Park, Hsinchu, Taiwan, R.O.C. Tel: 886-3-563-1999 Fax: 886-3-563-1189 Holtek Semiconductor Inc. (Taipei Office) 11F, No.576, Sec.7 Chung Hsiao Rd., Taipei, Taiwan, R.O.C. Tel: 886-2-2782-9635 Fax: 886-2-2782-9636 Fax: 886-2-2782-7128 (International sales hotline) Holtek Semiconductor (Hong Kong) Ltd. RM.711, Tower Cheung Plaza, Cheung Rd., Kowloon, Hong Kong Tel: 852-2-745-8288 Fax: 852-2-742-8657 Holtek Semiconductor (Shanghai) Ltd. Floor, Building No.889, Shan Road, Shanghai, China Tel:021-6485-5560 Fax:021-6485-0313 Holmate Technology Corp. 48531 Warm Springs Boulevard, Suite 413, Fremont, 94539 Tel: 510-252-9880 Fax: 510-252-9885 Copyright 2001 HOLTEK SEMICONDUCTOR INC. information appearing this Data Sheet believed accurate time publication. However, Holtek assumes responsibility arising from specifications described. applications mentioned herein used solely purpose illustration Holtek makes warranty representation that such applications will suitable without further modification, recommends products application that present risk human life malfunction otherwise. Holtek reserves right alter products without prior notification. most up-to-date information, please visit site http://www.holtek.com.tw.
February 2001

HT9032 HT9032C/D operating voltage: 3.5V~5.5V Bell V.23 demodulat

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