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參數資料
| 型號： | TP5089 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | CONNECTOR ACCESSORY |
| 中文描述： | 連接器附件 |
| 文件頁數： | 1/6頁 |
| 文件大小： | 119K |
| 代理商： | TP5089 |
TL/H/5057
T
December 1991
TP5089 DTMF (TOUCH-TONE) Generator
General Description
The TP5089 is a low threshold voltage, field-implanted, met-
al gate CMOS integrated circuit. It interfaces directly to a
standard telephone keypad and generates all dual tone mul-
ti-frequency pairs required in tone-dialing systems. The tone
synthesizers are locked to an on-chip reference oscillator
using an inexpensive 3.579545 MHz crystal for high tone
accuracy. The crystal and an output load resistor are the
only external components required for tone generation. A
MUTE OUT logic signal, which changes state when any key
is depressed, is also provided.
Features
Y
3.5V–10V operation when generating tones
Y
2V operation of keyscan and MUTE logic
Y
Static sensing of key closures or logic inputs
Y
On-chip 3.579545 MHz crystal-controlled oscillator
Y
Output amplitudes proportional to supply voltage
Y
High group pre-emphasis
Y
Low harmonic distortion
Y
Open emitter-follower low-impedance output
Y
SINGLE TONE INHIBIT pin
Block Diagram
TL/H/5057–1
FIGURE 1
C
1995 National Semiconductor Corporation
RRD-B30M115/Printed in U. S. A.
相關PDF資料 |
PDF描述 |
|---|---|
| TP5089N | CONNECTOR ACCESSORY |
| TP5228 | CLASS AB STEREO HEADPHONE DRIVER WITH MUTE |
| TP5299 | ECHO PROCESSOR IC |
| TP5510 | Full Duplex Analog Front End for Consumer Applications |
| TP5510N | Full Duplex Analog Front End for Consumer Applications |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TP5089N | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:TP5089 DTMF (TOUCH-TONE) Generator |
| TP5089N/A+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Tone Telephone Dialer |
| TP5089N/B+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Tone Telephone Dialer |
| TP5089WM | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Tone Telephone Dialer |
| TP509 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:10 to 12 WATT SINGLE and DUAL OUTPUT DC-DC CONVERTERS |
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