EM91710A/B
TONE/PULES SWITCHABLE DIALER
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
Pulse output pin,SDO pin
leakage current
sink current
Pulse rate
Make/Break ratio
Pre-digit Pause
Inter-digit Pause
Sym.
Ipoh
Ipol
fpr
TM:TB
t
PDP
t
IDP
Conditions
Vpo = 2.5V
Vpo = 0.5V
Min.
-
0.5
-
-
-
-
-
-
-
-
Typ.
-
-
10
20
40:60
33:66
40
33
800
500
Max.
0.1
-
-
-
-
-
-
-
-
-
Unit
uA
mA
pps
pps
%
%
ms
ms
ms
ms
M/B ratio = 40:60
M/B ratio = 33:66
Pulse rate = 10pps
Pulse rate = 20pps
ELECTRICAL CHARACTERISTICS
(III) (Ambient Temperature is 25°C, All voltage referenced to V
SS
, V
DD
= 2.5V,
unless otherwise noted
.
)
(TONE mode specification, fosc. = 3.579545 MHz)
Parameter
TONE output pin
DC level
sink current
AC level
Load resistor
DTMF signal:
pre-emphasis
*distortion
Minimum tone duration
Minimum intertone
pause
Sym.
Vdc
Itl
Vdtmf
Rl
twist
Dist.
t
TD
t
ITP
Conditions
V
DD
= 2.0V~5.5V
Vdtmf = 0.5V
Row group, RL = 10K
Ω
Dist.
≤
-23dB
V
DD
= 2.0~5.5V, Column-Row group
RL = 10K
Ω
Auto redial
Auto redial
Min.
0.5V
DD
0.2
130
10
1
-
Typ.
-
-
155
-
2
-30
98/83
98/83
Max.
0.7V
DD
-
170
-
3
-23
-
-
Unit
V
mA
mVrms
K
Ω
dB
dB
ms
ms
-
-
* Distortion (dB) = 20 log { [(V
12
+ V
22
+ V
32
+...+V
n
)
1/2
] / [(V
L2
+ V
H 2
)
1/2
]}.
V
L
, V
H
: Row group and Column group signal.
V
1
,V
2
,...., V
n
: Harmonic signal (BW = 300 Hz~ 3500 Hz).
* Actual frequency output (fosc. = 3.579545 MHz)
KEYBOARD SCANNING PIN
STANDARD (Hz)
R1
R2
R3
R4
C1
C2
C3
f1
f2
f3
f4
f5
f6
f7
697
770
852
941
1209
1336
1477
OUTPUT (Hz)
699
766
848
948
1216
1332
1472
DEVIATION (%)
+0.28
-0.52
-0.47
+0.74
+0.57
-0.30
-0.34
9.30.1997
9
* This specification are subject to be changed without notice.
EMC [ ELAN MICROELECTRONICS CORP ]
