HT9201A Ver la hoja de datos (PDF) - Holtek Semiconductor

Número de pieza

componentes Descripción

Fabricante

HT9201A

Simple Tone Dialer

Holtek Semiconductor 

HT9201A/B

Electrical Characteristics

(Ta=25°C)

Symbol

Parameter

VDD

IDD

Operating Voltage

Operating Current

Test Conditions

VDD

Conditions

—

2.5V

Keypad entry

No load

Min. Typ. Max. Unit

2

— 5.5 V

—

0.6

2 mA

ISTB

VIL

VIH

IXMO

Standby Current

Input Low Voltage

Input High Voltage

XMUTE Leakage Current

2.5V No load, no entry

—

—

—

—

—

VXMUTE=12V

No entry

—

—

1

µA

VSS

— 0.2VDD V

0.8VDD —

VDD

V

—

—

1

µA

IOLXM

IOH1

IOL1

TDB

FOSC

XMUTE Sink Current

2.5V VXMUTE=0.5V

1

—

— mA

Keypad Pin Source Current 2.5V VOH=0V

–4

— –40 µA

Keypad Pin Sink Current 2.5V VOL=2.5V

200 400 — µA

Key-in Debounce Time

— FOSC=3.5795MHz

—

20

— ms

System Frequency

— Crystal=3.5795MHz 3.5759 3.5795 3.5831 MHz

Tone Mode Electrical Characteristics

(FOSC=3.5795MHz, Ta=25°C)

Symbol

Parameter

VTDC

ITOL

VTAC

RL

ACR

THD

DTMF Output DC Level

DTMF Sink Current

DTMF Output AC Level

DTMF Output Load

Column Pre-emphasis

DTMF Signal Distortion

Test Conditions

VDD

Conditions

—

—

2.5V VDTMF=0.5V

— Row group, RL=5kΩ

2.5V THD≤–23dB

2.5V Row group=0dB

2.5V RL=5kΩ

Min. Typ. Max. Unit

0.45VDD — 0.7VDD V

0.1 — — mA

0.12 0.155 0.18 Vrms

5

—

—

kΩ

1

2

3

dB

— –30 –23 dB

THD (Distortion) (dB) = 20 log ( √V12+V22+…+Vn2 ⁄ √Vi2+Vh2 )

Vi, Vh: Row group and column group signals

V1, V2, ... Vn: Harmonic signals (BW=300Hz~3500Hz)

4

3rd Dec ’97

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