- 您現在的位置：買賣IC網 > PDF目錄382716 > UBA2051 (NXP Semiconductors N.V.) One-chip telephone ICs with speech, dialler and ringer functions PDF資料下載
參數資料
| 型號： | UBA2051 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | One-chip telephone ICs with speech, dialler and ringer functions |
| 中文描述： | 一個有語言，撥號及振鈴電話集成電路芯片的功能 |
| 文件頁數： | 23/52頁 |
| 文件大小： | 292K |
| 代理商： | UBA2051 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁當前第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁
2000 May 19
23
Philips Semiconductors
Product specification
One-chip telephone ICs with speech,
dialler and ringer functions
UBA2050(A); UBA2051(A;C)
K
EYBOARD DETECTOR
(
PINS
C1
TO
C4
AND
R1
TO
R4)
The pins are directly connected to a traditional single
contact keyboard. The keyboard is normally static with
outputs R1 to R4 at LOW level and inputs C1 to C4 with
internal pull-up resistors. When any key is pressed,
scanning is done to detect which key has been pressed.
A second key entry will be valid after having released the
first key entry. Simultaneously pressing several keys will
result in no action.
A key entry becomes valid when the depress debounce
time t
dd
has elapsed (see Fig.24). After the release of a
valid key, the scanning is frozen when the release
debounce time t
rd
has elapsed.
The pins R1 to R4 are LOW and pull-down resistors
replace pull-up resistors at pins C1 to C4 when
V
DD
< V
POR
.
handbook, full pagewidth
MGM341
key entry
tdd
key valid
trd
Fig.24 Timing diagram debouncing.
t
dd
= depress debounce time.
t
rd
= release debounce time.
相關PDF資料 |
PDF描述 |
|---|---|
| UBA2051A | One-chip telephone ICs with speech, dialler and ringer functions |
| UBA2051AT | One-chip telephone ICs with speech, dialler and ringer functions |
| UBA2051C | One-chip telephone ICs with speech, dialler and ringer functions |
| UBA2051CT | One-chip telephone ICs with speech, dialler and ringer functions |
| UBA2051T | One-chip telephone ICs with speech, dialler and ringer functions |
相關代理商/技術參數 |
參數描述 |
|---|---|
| UBA2051A | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:One-chip telephone ICs with speech, dialler and ringer functions |
| UBA2051AT | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:One-chip telephone ICs with speech, dialler and ringer functions |
| UBA2051C | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:One-chip telephone ICs with speech, dialler and ringer functions |
| UBA2051CT | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:One-chip telephone ICs with speech, dialler and ringer functions |
| UBA2051T | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:One-chip telephone ICs with speech, dialler and ringer functions |
發布緊急采購，3分鐘左右您將得到回復。