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Preliminary
Features
* * * * * *
HT9011 FM IF Detector
* * * *
Operating voltage: 1.1V~3.5V Constant power supply voltage can be generated by externally adding a transistor: VREG=1.0V typ. Alarm function sensitivity: VALM=1.1V typ. Low current consumption: ICCQ=1.1mA typ. Built-in 2nd stage mixer for double conversion method Mixer operating frequency: 10MHz~50MHz
Built-in low-pass filter and waveform shaping circuit enable the extraction of FSK signals from voice signals Built-in battery-saving function for longer battery life time High transmission rate: 1200 bps 20-pin SSOP package (0.65mm Pitch)
General Description
The HT9011 is designed for FM communication system devices. It combines a paging system, mixer, IF limiter, Quadrature detector, operation amplifier, comparator and more. The HT9011 could provide the customers PAGER system with total solution along with Holteks POCSAG Pager Controller series products.
Block Diagram
M IX I G N D REGO REGC ALM FSKO CHG BS LPFO LPFI
REG. M ix e r
ALARM
FSK COMP.
Q u ic k C h a rg e
AMP
IF A m p OSC Q uad Det
OSCIOSCO
M IX O
VCC
IF IN
DEC
FSKR
IF O
QUAD
AFO
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March 1, 2000
Preliminary
Pin Assignment
OSCI 1 2 3 4 5 6 7 8 9 10 OSCO M IX O VCC IF IN DEC FSKR IF O QUAD AFO 20 19 18 17 16 15 14 13 12 11 M IX I GND REGO REGC ALM FSKO CHG BS LPFO LPFI
HT9011
HT9011 20 SSO P
Pin Description
Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 Pin Name OSCI OSCO MIXO VCC IFIN DEC FSKR IFO QUAD AFO LPFI LPFO BS I/O I O O 3/4 I I I O I O I O I Description These pins are connected to the external parts of an oscillating circuit. Mixer output pin. Connect a 455kHz ceramic filter between this pin and the IFIN pin. Positive power supply Input terminal for IF Amp. Bias Decoupling Reference input of differential amplifier for waveform shaping. Connect the capacitor externally. IF Amplifier Output pin. Connect the discriminator through the coupling capacitor. FM demodulator phase shift input pin connected to a quadrature detector phase shifter. FM demodulator output pin Low Pass Filter Input pin Low Pass Filter Output pin Battery-saving Control pin H Normal Operation L Battery-saving
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March 1, 2000
Preliminary
Pin No. 14 15 16 Pin Name CHG FSKO ALM I/O I O O Description Control pin for quick charge-discharge circuit. H turn on quick charge-discharge L turn off quick charge-discharge FSK NRZ data output
HT9011
Output pin for Low Voltage Alarm At VCC@1.1V, this pin becomes H (@VCC) and can indicate deterioration of battery. Control pin of external transistor for regulator of external power supply. Externally connect the PNP transistor Output voltage monitoring pin of regulator for external power supply. Negative power supply, ground MIXER Input terminal
17 18 19 20
REGC REGO GND MIXI
O O 3/4 I
Absolute Maximum Ratings
Power Supply Voltage............VCC-0.3V to 4.0V Operating Temperature range ........0C to 45C Power Dissipation ..................................730mW Storage Temperature.................-55C to 150C
Note: These are stress ratings only. Stresses exceeding the range specified under Absolute Maximum Ratings may cause substantial damage to the device. Functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability.
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March 1, 2000
Preliminary
Electrical Characteristics
HT9011
Ta=25C, Unless oterwise specified, Fin (MIX)=21.7MHz, Fin(IF)=455kHz, Fdev=4kHz, Fin=600Hz Symbol Iccq Icco GMV IP Parameter Quiescent Current Supply Current at Battery Saving Test Conditions VDD 1.4V 1.4V Conditions Min. Typ. Max. 3/4 3/4 9 3/4 3/4 3/4 MIX IN, VIN (MIX)=60dBmEMF IF IN, VIN (IF)=60dBmEMF IF IN, VIN (IF)=22dBmEMF 3/4 3/4 3/4 3/4 3/4 30 3/4 40 1.05 3/4 3/4 3/4 3/4 0.95 1.1 0 12.5 -10 5 2 63 63 25 14 23 45 50 50 1.1 3/4 3/4 3/4 3/4 1.0 1.6 5 16 3/4 3/4 3/4 3/4 3/4 3/4 3/4 27 60 3/4 60 1.15 0.4 2 0.4 2 1.05 Unit mA mA dB dBm kW kW dB dB dB dBmEMF dBmEMF mVrms dB % V V mA V mA V
MIXER Conversion Gain 1.4V MIXER 3rd Interception 1.4V point 1.4V IF Amp Input Resistance 1.4V Signal to Noise Ration 1 Signal to Noise Ration 2 Signal to Noise Ration 3 -3dB Limiting Sensitivity 1 -3dB Limiting Sensitivity 2 Detected Output Level AM Rejection Ratio FSK OUT Duty Ratio Alarm Detected Voltage 1.4V 1.4V 1.4V
R(MIX)in MIX Input Resistance R(IF)in S/N1 S/N2 S/N3 Vi(LIM)1 Vi(LIM)2 VOD AMR DR VALM VALML IALM VFSKL IFSK VREC
1.4V MIX input 1.4V IF input 1.4V VIN (IF)=60dBmEMF 1.4V VIN (IF)=60dBmEMF AM=30%
1.4V VIN (IF)=60dBmEMF 1.4V
L Level Output Voltage 1.4V I=100mA (ALM) H Level Output Current 1.4V (ALM) L Level Output Voltage 1.4V I=100mA (FSK) H Level Output Current 1.4V (FSK) Constant Voltage Output 1.4V
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Preliminary
Functional Description
Battery-saving function The battery-saving function is controlled by the pin BS and the battery consumption is minimized by reducing the current consumption. If the pin is logic LOW, the HT9011 enters the battery-saving mode, otherwise HT9011 is in normal operation state. FSK NRZ output The HT9011 has two built-in operation amplifiers. One of these operation amplifiers is connected inside the IC to the NRZ comparator. The NRZ comparator can output the input signal waveform as a square wave. The NRZ comparator output is an open collector. If the IC interfaces with CMOS devices, the possible connection is shown below.
V 4 1 .5 V
HT9011
Battery low alarm function In case the HT9011 is battery powered, when the power supply voltage goes low to about 1.1V, the output of the pin ALM rises up to about 1.1V and the battery voltage can be monitored by other devices. The output is an open collector similar to FSK NRZ output. Constant voltage regulator for external part power supply Externally connecting the transistor as shown in the figure below, the output REGO could be used constantly as 1.0V regulator output. At the battery-saving mode, the regulator is turned OFF .
V re g V
CC
CC
+
CC
fo r C M O S IC
V
1 .0 m F
2N3906
14
FSKO
C M O S IC
REGO
REGC
Local oscillator circuit The HT9011 local oscillator circuit is of Colpitts type oscillator composed of internal emitter follower circuit and an external Xtal. The transistor is connected externally as shown in the figure below. Resistor R may be needed to increase the current of the local oscillator circuit in order to compose the overtone oscillator and improve its stability. It is recommended that the resistor be connected between OSCI and REGO to provide battery-saving mode.
OSCI 1 REGO 22kW 2 1 .8 5 5 M H z 56pF 47pF R OSCO 2
Quick charge-discharge circuit If an FSK signal inputs during the brief transition from battery-saving state to normal operation state, the time that the pin FSKR arrives at the reference voltage is delayed by a time constant determined by the capacitor connected to the pin FSKR and the internal resistor. Sometimes, the output signal becomes erroneous due to some error in the comparator input voltage. Such a case could be avoided by quickly charging or discharging the capacitor connected to the pin FSKR. By using the quick charge-discharge circuit, the delay time for the FSKR pin to be of the same level with the LPFO pin could be minimized, hence, erroneous FSK NRZ output signal is prevented.
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March 1, 2000
Preliminary
Application Circuits
Pager RF board (149.7MHz)
2pF
HT9011
39pF
2~10pF 0 .0 0 1 m F 22pF 5pF 0 .0 1 m F 56kW 100W 20pF 31033 31033 82mH 12W 0 .1 m F 0 .0 1 m F 20pF TP TP1
0 .0 0 1 m F 680nH 3 .9 k W NO
12kW
2~10pF
3pF
2 .2 k W NO 9pF 39nH
12pF 560W 31033 2pF
120nH 0 .0 0 1 m F 0 .0 1 m F 47kW 2 .7 m H 2734 2 1 .8 5 5 M H z 22kW 56pF 47pF 2 3
1
6pF 1 .5 V B+ TP 4 .7 k W + 10mF 1 CFW M 455F 0 .1 m F 4 5 6 7 + 8 455C28 3 .3 k W 22pF 9 10
3
120W 20pF
0 .0 1 m F
18kW 0 .0 0 1 m F M IX I GND REGO REGC ALM FSKO CHG BS LPFO LPFI 20 19 18 17 16 15 14 13 12 11 0 .0 1 m F 68kW 10kW 10kW 47kW 10kW BS1 BAL DATA BS2 2N3906 B+ 0 .1 m F 0 .1 m F
OSCI OSCO M IX O VCC IF IN DEC FSKR IF O QUAD AFO
TP3 TP 10mF
4 5 2
0 .1 m F
HT9011
56pF
68kW 0 .0 0 3 3 m F
TP TP3
68kW
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March 1, 2000
Preliminary
HT9011
Holtek Semiconductor Inc. (Headquarters) No.3 Creation Rd. II, Science-based Industrial Park, Hsinchu, Taiwan, R.O.C. Tel: 886-3-563-1999 Fax: 886-3-563-1189 Holtek Semiconductor Inc. (Taipei Office) 5F, No.576, Sec.7 Chung Hsiao E. 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 2, Cheung Sha Wan Plaza, 833 Cheung Sha Wan Rd., Kowloon, Hong Kong Tel: 852-2-745-8288 Fax: 852-2-742-8657 Copyright a 2000 by HOLTEK SEMICONDUCTOR INC. The information appearing in this Data Sheet is believed to be accurate at the time of publication. However, Holtek assumes no responsibility arising from the use of the specifications described. The applications mentioned herein are used solely for the purpose of illustration and Holtek makes no warranty or representation that such applications will be suitable without further modification, nor recommends the use of its products for application that may present a risk to human life due to malfunction or otherwise. Holtek reserves the right to alter its products without prior notification. For the most up-to-date information, please visit our web site at http://www.holtek.com.tw.
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March 1, 2000

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