Datasheet HT9011 Datasheet (Holtek Semiconductor Inc)

HT9011

Preliminary

Features

Operating voltage: 1.1V~3.5V

·

Constant power supply voltage can be gen

·

erated by externally adding a transistor:
V

=1.0V typ.

REG

Alarm function sensitivity: V

·

Low current consumption: I

·

Built-in 2nd stage mixer for double conver

·

sion method
Mixer operating frequency: 10MHz~50MHz

·

General Description

The HT9011 is designed for FM communication
system devices. It combines a paging system,
mixer, IF limiter, Quadrature detector, opera
tion amplifier, comparator and more. The

Block Diagram

MIXI

REGCGND REGO ALM FSKO CHG LPFOBS

=1.1V typ.

ALM

=1.1mA typ.

CCQ

FM IF Detector

Built-in low-pass filter and waveform shap

·

-

-

-

ing circuit enable the extraction of FSK sig
nals 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)

·

HT9011 could provide the customer¢s PAGER
system with total solution along with Holtek¢s
POCSAG Pager Controller series products.

LPFI

-

-

Mixer

OSC

OSCOOSCI MIXO

REG. ALARM

VCC FSKR

FSK

COM P.

IF IN

Quick

C harge

IF A m p

1 March 1, 2000

AM P

Q uad D et

AFOQUADIF ODEC

Pin Assignment

Preliminary

HT9011

OSCI

OSCO

MIXO

VCC

IF IN

DEC

FSKR

IF O

QUAD

AFO

1

2

3

4

5

6

7

8

9

10

MIXI

20

GND

19

REGO

18

REGC

17

ALM

16

FSKO

15

CHG

14

BS

13

LPFO

12

LPFI

11

H T 9011

2 0 S S O P

Pin Description

Pin No. Pin Name I/O Description

1 OSCI I

2 OSCO O

3 MIXO O

4 VCC

5 IFIN I Input terminal for IF Amp.

6 DEC I Bias Decoupling

7 FSKR I

8 IFO O

9 QUAD I

10 AFO O FM demodulator output pin

11 LPFI I Low Pass Filter Input pin

12 LPFO O Low Pass Filter Output pin

13 BS I

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

¾

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.

Battery-saving Control pin

²H² Normal Operation

²L² Battery-saving

2 March 1, 2000

Preliminary

Pin No. Pin Name I/O Description

Control pin for quick charge-discharge circuit.

14 CHG I

15 FSKO O FSK NRZ data output

16 ALM O

17 REGC O

18 REGO O

19 GND

20 MIXI I MIXER Input terminal

²H² turn on quick charge-discharge

²L² turn off quick charge-discharge

Output pin for Low Voltage Alarm

@1.1V, this pin becomes ²H² (@VCC) and can indicate dete

At V

CC

rioration 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

¾

HT9011

Absolute Maximum Ratings

Power Supply Voltage............VCC-0.3V to 4.0V Power Dissipation..................................730mW

Operating Temperature range ........0°Cto45°C

Storage Temperature.................-55°Cto150°C

-

Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maxi-

mum Ratings² 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.

3 March 1, 2000

Preliminary

HT9011

Electrical Characteristics

Ta=25°C, Unless oterwise specified, Fin(MIX)=21.7MHz, Fin(IF)=455kHz, F

Symbol Parameter

Iccq Quiescent Current 1.4V

Icco

Supply Current at
Battery Saving

Test Conditions

V

DD

1.4V

Conditions

Min. Typ. Max. Unit

¾

¾

GMV MIXER Conversion Gain 1.4V 9 12.5 16 dB

IP

R(MIX)in MIX Input Resistance 1.4V

R(IF)in IF Amp Input Resistance 1.4V

S/N1 Signal to Noise Ration 1 1.4V

S/N2 Signal to Noise Ration 2 1.4V

S/N3 Signal to Noise Ration 3 1.4V

Vi(LIM)1

Vi(LIM)2

V

OD

AMR AM Rejection Ratio 1.4V

DR FSK OUT Duty Ratio 1.4V

V

ALM

V

ALML

I

ALM

V

FSKL

I

FSK

V

REC

MIXER 3rd Interception
point

1.4V

¾-10 ¾

¾

¾

-3dB Limiting

Sensitivity 1

-3dB Limiting
Sensitivity 2

1.4V MIX input

1.4V IF input

Detected Output Level 1.4V

MIX IN,

(MIX)=60dBmEMF

V

IN

IF IN,

(IF)=60dBmEMF

V

IN

IF IN,

(IF)=22dBmEMF

V

IN

(IF)=60dBmEMF

V

IN

(IF)=60dBmEMF

V

IN

AM=30%

(IF)=60dBmEMF

V

IN

¾

¾

¾

¾

¾

30 45 60 mVrms

¾

40 50 60 %

Alarm Detected Voltage 1.4V 1.05 1.1 1.15 V

²L² Level Output Voltage
(ALM)

²H² Level Output Current
(ALM)

²L² Level Output Voltage
(FSK)

²H² Level Output Current
(FSK)

1.4V

I=100mA ¾¾

1.4V

1.4V

I=100mA ¾¾

1.4V

¾¾

¾¾

Constant Voltage Output 1.4V 0.95 1.0 1.05 V

=±4kHz, Fin=600Hz

dev

1.1 1.6 mA

05

5

¾ kW

2

¾ kW

63

¾

63

¾

25

¾

14

¾ dBmEMF

23 27

50

dBmEMF

¾

0.4 V

2

0.4 V

2

mA

dBm

dB

dB

dB

dB

mA

mA

4 March 1, 2000

Preliminary

Functional Description

Battery-saving function

The battery-saving function is controlled by the
pin ²BS² and the battery consumption is mini
mized 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.

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 ²ALM² 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.

HT9011

FSK NRZ output

The HT9011 has two built-in operation amplifi
ers. One of these operation amplifiers is con
nected inside the IC to the NRZ comparator.
The NRZ comparator can output the input sig
nal waveform as a square wave. The NRZ com
parator output is an open collector. If the IC
interfaces with CMOS devices, the possible con
nection is shown below.

V

CC

1.5V

4

VCC fo r

CMOS IC

14

FSKO

CMOS IC

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 ²FSKR² arrives
at the reference voltage is delayed by a time
constant determined by the capacitor connected
to the pin ²FSKR² and the internal resistor.
Sometimes, the output signal becomes errone
ous due to some error in the comparator input
voltage. Such a case could be avoided by quickly
charging or discharging the capacitor con
nected to the pin ²FSKR². By using the quick
charge-discharge circuit, the delay time for the

²FSKR² pin to be of the same level with the
²LPFO² pin could be minimized, hence, errone

ous FSK NRZ output signal is prevented.

Constant voltage regulator for external part
power supply

­Externally connecting the transistor as shown

­in the figure below, the output ²REGO² could be

-

used constantly as 1.0V regulator output. At

-

the battery-saving mode, the regulator is
turned OFF .

-

Vreg

V

+

2N 3906

1.0mF

REGO REGC

CC

Local oscillator circuit

The HT9011 local oscillator circuit is of Colpitts
type oscillator composed of internal emitter fol­lower circuit and an external X¢tal. The transis­tor is connected externally as shown in the
figure below. Resistor ²R² 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.

-

-

REGO

21.855M H z

OSCI OSCO

1 2

22k

W

56pF

47pF

-

R

5 March 1, 2000

Application Circuits

Pager RF board (149.7MHz)

Preliminary

2pF

39pF

2~10pF

0.001mF

22pF

5pF

0.01mF
56k

W

3103331033

100

20pF

82mH

HT9011

W

12

W

2~10pF

12pF

560

0.001mF

680nH

3.9k

W

2.2k

10mF

4.7k

2pF

+

1.5V

W

0.1mF

120nH

W

9pF

B+

TP

21.855M H z

C FW M 455F

345

455C 28

3.3k

56pF

47pF

12

TP3

TP

0.1mF

10mF

22pF

W

22k

1

OSCI

2

OSCO

3

MIXO

4

VCC

5

IF IN

6

DEC

7

FSKR

+

8

IF O

9

QUAD

10

AFO

3pF

31033

W

NO

NO

39nH

6pF

W

H T9011

12k

20pF

TP

0.001mF

2734

MIXI

GND

REGO

REGC

ALM

FSKO

CHG

BS

LPF O

LPF I

56pF

0.1mF

W

0.01mF

TP1

0.01mF

47k

W

2.7mH

18k

W

0.001mF

20

19

18

17

16

10k

W

15

10k

W

14

47k

W

13

10k

W

12

11

68k

W

20pF

BAL

DATA

BS2

BS1

0.01mF

2N 3906

120

0.01mF

0.1mF

B+

W

0.1mF

68k

0.0033mF

68k

TP

TP3

W

W

6 March 1, 2000

Preliminary

HT9011

Holtek Semiconductor Inc. (Headquarters)

No.3 Creation Rd. II, Science-based Industrial Park, Hsinchu, Taiwan, R.O.C.
Tel: [phone]
Fax: [phone]

Holtek Semiconductor Inc. (Taipei Office)

5F, No.576, Sec.7 Chung Hsiao E. Rd., Taipei, Taiwan, R.O.C.
Tel: [phone]
Fax: [phone]
Fax: [phone] (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: [phone]
Fax: [phone]

Copyright ã 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 specificationsdescribed. Theapplications mentionedherein 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 pres
ent 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.

7 March 1, 2000

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