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參數(shù)資料
| 型號： | AS2590 |
| 廠商： | AUSTRIAMICROSYSTEMS AG |
| 英文描述： | LC DISPLAY DRIVER WITH 18 DIGITS, 6 SYMBOLS AND CLOCK/TIMER |
| 中文描述： | 立法會顯示驅(qū)動器，帶有18個數(shù)字，符號和6時鐘/計時器 |
| 文件頁數(shù)： | 1/12頁 |
| 文件大小： | 78K |
| 代理商： | AS2590 |
1
Data Sheet
AS2590
Rev. 1
Dec. 1993
LC DISPLAY DRIVER WITH 18 DIGITS,
6 SYMBOLS AND CLOCK/TIMER
Austria Mikro Systeme International
V
DD
KEYBOARD
Vss
DIALLER
CONTROLLER
AS2574A/B
SDA
SCL
V
DD
X1
X2
V23
V13
V
LCD
BIAS
MS
Vss
A
32.768kHz
SPEECH CIRCUIT
Key Features
K
Very low operating current, typ. 30
μ
A @ 3V
K
Low power oscillator using 32.768 kHz Xtal
K
2-wire interface compatible to AS2574B
K
18 digits by 7 segments
K
6 symbols
K
24 hour clock showing hours and minutes
K
Timer automatically showing elapsed time in
minutes and seconds after each telephone
conversation
K
33 LCD segment outputs and 4 LCD backplane
outputs
K
4 times multiplex mode with a cycle time of 128 Hz
K
Mode select pin for selecting clock function
General Description
The AS2590 is an integrated CMOS device for driving a
liquid crystal display intended for use in telephones. The
2-wire serial interface is compatible to the dialler
AS2574B.
The extreme low operating current allows the circuit to
be operational also during on-hook which is necessary
in order to the use of the clock function. In on-hook
condition the circuit can be supplied by a small leakage
current from the telephone line or from a small 3V
battery.
Whether the oscillator shall continue operating or be
stopped during on-hook is determined by the mode pin,
MS.
Package
Available in 48 pin DIP and 52 pin PLCC.
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