em91401 ELAN Microelectronics Corp, em91401 Datasheet - Page 11

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em91401

Manufacturer Part Number
em91401
Description
Tone/pulse Switchable Dialer With Lcd Interface And Dual-tone Melody Generator
Manufacturer
ELAN Microelectronics Corp
Datasheet

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ELECTRICAL CHARACTERISTIC
* This specification are subject to be changed without notice.
(Ambient temperature is 25 C, V
Keyboard debounce time
Key tone signal:
frequency
duration
Pause time
Pulse to Tone waiting time
Flash time
Pulse rate
Make/Break ratio
Inter-digit pause time
DTMF pin: sink current
DTMF signal DC level
DTMF signal: ac level
pre-emphase
distortion
load resistance
Minimum tone duration
Minimum inter-tone pause
Melody output signal:
main tone ac level
Sub-tone
HD key release hold function
debounce time
SDO every bit time
Off-Hook delay time
Parameter
DD
=2.5V unless otherwise noted, all voltages referenced to Vss,Fosc=3.579545 MHz)
Sym.
Tdb
Fkt
Tkt
Tp
Tpt
Tf
PSR
MBR
Tidp
IoL
Vdc
Vdtmf
Twist
THD
ZL
Tp
Titp
Vmtac
Vstac
Thdrdb
Tbit
Tdly
Min.
-0.2
142
0.5
3.8
96
96
48
37
1
5
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE
(-23.3)
(-25.3)
40:60
33:66
Typ.
600
100
300
800
500
300
600
160
-30
3.6
3.6
3.9
30
80
10
98
42
20
20
98
53
93
2
-
-
-
Max. Unit
0.75
180 mVrms Row group
100
100
-23
4.1
58
47
3
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
AND DUAL-TONE MELODY GENERATOR
(dBm)
mVrms Vdd =2.0V ~ 5.5V
mVrms Vdd =2.0V ~ 5.5V
(dBm)
sec.
ms
ms
ms
Hz
ms
sec.
ms
pps
%
mA
Vdd
dB
dB
K
ms
ms
ms
Row3B, Row4B=NR, NR
Row3B, Row4B=NR, R-Vss
Row3B,Row4B=R-Vss,R-Vss
PSR = 10 pps
PSR = 20 pps
Column - Row
THD
Memory dialing
Row3B,Row4B=R-Vss, NR
Row1 = R-Vdd
Row1 = R-Vss
Row2 = NR
Row2 = R-Vss
Vdtmf = 0.5 V
Vdd = 2.0V ~ 5.5V
RL = 5 K
Condition
23dB
EM91401 SERIES
10.1.1997
11

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