EM91810A 查看數據表（PDF） - ELAN Microelectronics
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EM91810A
ELAN Microelectronics
EM91810A Datasheet PDF : 18 Pages
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EM91810A/B
TONE/PULES SWITCHABLE DIALER WITH LCD INTERFACE
ELECTRICAL
CHARACTERISTICS
(II)
(Ambient
Temperature
is
25°C,
All
voltage
referenced
to
V
SS
,
V
DD
=
2.5V,
unless otherwise noted.)
(Pulse mode specification, fosc. = 3.579545 MHz)
Parameter
Sym.
Conditions
Min. Typ. Max. Unit
Pulse output pin,SDO pin
leakage current
sink current
Pulse rate
Make/Break ratio
Pre-digit Pause
Inter-digit Pause
Ipoh Vpo = 2.5V
Ipol Vpo = 0.5V
fpr
TM:TB
tPDP
M/B ratio = 40:60
M/B ratio = 33:66
tIDP
Pulse rate = 10pps
Pulse rate = 20pps
-
-
0.1
uA
0.5
-
-
mA
-
10
-
pps
-
20
-
pps
- 40:60 -
%
- 33:66 -
%
-
40
-
ms
-
33
-
ms
-
800
-
ms
-
500
-
ms
ELECTRICAL CHARACTERISTICS (III) (Ambient Temperature is 25°C, All voltage referenced to VSS , VDD = 2.5V,
unless otherwise noted.)
(TONE mode specification, fosc. = 3.579545 MHz)
Parameter
Sym.
Conditions
Min. Typ. Max. Unit
TONE output pin
DC level
sink current
AC level
Load resistor
DTMF signal:
pre-emphasis
*distortion
Minimum tone duration
Minimum intertone
pause
Vdc
Itl
Vdtmf
Rl
V = 2.0V~5.5V
DD
Vdtmf = 0.5V
Row group, RL = 10KΩ
Dist.≤ -23dB
0.5V -
DD
0.2 -
130 155
10 -
0.7V
DD
-
170
-
V
mA
mVrms
KΩ
twist VDD = 2.0~5.5V, Column-Row group 1 2
3
dB
Dist. RL = 10KΩ
- -30 -23 dB
tTD
Auto redial
t
Auto redial
ITP
- 98/83 -
ms
- 98/83 -
ms
* Distortion (dB) = 20 log { [(V 2 + V 2 + V 2+...+V ) 1/2 ] / [(V 2 + V )2 1/2 ]}.
1
2
3
n
L
H
V , V : Row group and Column group signal.
LH
V ,V ,...., V : Harmonic signal (BW = 300 Hz~ 3500 Hz).
12
n
* Actual frequency output (fosc. = 3.579545 MHz)
KEYBOARD SCANNING PIN STANDARD (Hz)
OUTPUT (Hz)
DEVIATION (%)
R1
f1
R2
f2
R3
f3
R4
f4
C1
f5
C2
f6
C3
f7
697
770
852
941
1209
1336
1477
699
766
848
948
1216
1332
1472
+0.28
-0.52
-0.47
+0.74
+0.57
-0.30
-0.34
* This specification are subject to be changed without notice.
10.1.1997 9
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