參數(shù)資料
型號(hào)： EM91242
廠商： ELAN Microelctronics Corp .
英文描述： Tone/Pulse Switchable Dialer with LCD Interface(帶LCD接口，低工作電流的音調(diào)/脈沖可轉(zhuǎn)換的撥號(hào)器)
中文描述： 音頻/脈沖切換撥號(hào)器與LCD接口（帶液晶顯示接口，低工作電流的音調(diào)/脈沖可轉(zhuǎn)換的撥號(hào)器）
文件頁(yè)數(shù)： 10/20頁(yè)
文件大?。?/td> 141K
代理商： EM91242
EM91242 SERIES
TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE
10
* This specification are subject to be changed without notice.
10.1.1997
Keyboard debounce time
Key tone signal:
frequency
present duration
Pause time and pulse to tone
Tdb
-
20
-
ms
Fkt
Tkt
Tp
Tpt
Tf
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
600
30
3.6
2
600
100
80
300
300
20
10
40:60
33:66
800
500
-
-
160
2
-30
-
98
90
83
98
90
83
3.9
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Hz
ms
sec.
sec.
COL2=NR
COL2=R-Vss
Row3, Row4=NR, NR
Row3, Row4=NR, R-Vss
Row3, Row4=R-Vss, NR
Row3, Row4=R-Vss,R-Vss
Flash time
ms
Flash pause time
Pulse rate
Tfp
PSR
ms
pps
Row1 = R-Vdd
Row1 = R-Vss
Row2 = NR
Row2 = R-Vss
PSR = 10 pps
PSR = 20 pps
Vdtmf = 0.5 V
Vdd = 2.0V ~ 5.5V
Make/Break ratio
MBR
%
Inter-digit pause time
Tidp
ms
DTMF pin: sink current
DTMF signal DC level
DTMF signal: ac level
pre-emphase
distortion
load resistance
IoL
Vdc
Vdtmf
Twist
THD
ZL
-0.2
0.5
142
1
-
5
96
88
81
96
88
81
3.8
mA
Vdd
0.75
180 mVrms Row group
3
dB
-23
dB
-
K
100
92
ms
85
100
92
ms
85
4.1
ms
Column - Row
RL = 5 K
THD
<
23dB
Minimum tone duration
T
D
Memory dialing
Minimum inter-tone pause
Titp
Memory dialing
SDO every bit time
Tbit
Parameter
Sym.
Min.
Typ.
Max. Unit
Condition
ELECTRICAL CHARACTERISTIC
(Ambient temperature is 25
°
C, V
DD
=2.5V unless otherwise noted, all voltages referenced to Vss,Fosc=3.579545 MHz)
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DTMF output frequency
(fosc = 3.579545 MHz)
Keyboard scan pin
ROW1 (f1)
ROW2 (f2)
ROW3 (f3)
ROW4 (f4)
COL1 (f5)
COL2 (f6)
COL3 (f7)
CCITT standard (Hz)
697
770
852
941
1209
1336
1477
Actual output (Hz)
699.1
766.2
847.4
947.9
1215.8
1331.6
1471.8
Deviation (%)
0.30
0.49
-0.53
0.73
0.56
-0.32
-0.35
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