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PDF EM91401C Data sheet ( Hoja de datos )
| Número de pieza | EM91401C | |
| Descripción | TONE/PULSE SWITCHABLE DIALER | |
| Fabricantes | ELAN Microelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de EM91401C (archivo pdf) en la parte inferior de esta página. Total 23 Páginas | ||
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EM9E1M4901140S1ESRERIEIESS
TONE/PULTSOENSEW/PUITLSCEHSAWBITLCEHDAIBALLE EDRIAWLEIRTWHILTHCDLCIDNITNETRERFFAACCEE
AND DUAANDL-DTUOANLE-TOMNEELMOEDLYODGYEGNEENRERAATTOORR
Preliminary
GENERAL DESCRIPTION
The EM91401 is a series of tone/pulse switchable dialers that is composed of T/P dialer. The EM91401 series
provide necessary functions of telephone set for application in any environment, such as Pulse dialing, Tone
(DTMF) dialing, Handfree dialing, keying tone ,and lock functions. The lock function is designed to inhibit toll
dialing operation. Beside this, melody generator, ring detector and SDO (Serial Data Output) functions are
provided in advance version. Melody generator will output dual-tone music in line hold duration. Ring detector
can prevent illegal dialing from pocket dialer. The SDO is designed to drive LCD driver and voice synthesizer.
In this application, the dialing numbers can be displayed on LCD screen with EM32100 ( or EM32116 ).
FEATURES
• Tone/Pulse switchable.
• Wide operating voltage from 2.0 V to 5.5 V.
• Low operating current, 0.15 mA (Pulse) and 0.3 mA (Tone) typically.
• Adding resistor on keyboard scan pin that can select many telephone specifications, such as : Pulse rate,
M/B ratio, Flash time, lock dialing functions.
• SDO function supports LCD driver and voice synthesizer to indicate dialing numbers.
• Line hold function is designed for stopping conversation temporality.
• Melody generator provides music on hold function.
• Lock function provides conventionality key lock and password lock operations.
• Ring detector is designed to prevent illegal dialing from pocket dialer.
• A 32-digit LNB (last number) redial memory.
• Keytone function provides rapidly keying recognition.
• Handfree function provides on-hook dialing and speakerphone application.
• Pause and P-T time are fixed to 3.6 seconds.
• Tone duration and inter-tone pause time are fixed to 98 ms.
• Using 3.579545 MHz crystal or ceramic resonator.
• Package forms: PDIP, skinny.
ORDERING INFORMATION
Versions list and function outline
VERSION
LNB
KT
EM91401A
√√
EM91401B
√√
EM91401C
√√
EM91401D
√√
Note : PDP = Pocket Dialer Prevented
HOLD(music)
√
√
LOCK
√
√
√
√
HF SDO(LCD) PDP
√
√√
√√
√
* This specification are subject to be changed without notice.
10.1.1997 1
1 page  
FUNCTION DESCRIPTIONS
EM91401 SERIES
TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE
AND DUAL-TONE MELODY GENERATOR
Preliminary
Dialing signal selection
The EM91401 series incorporated a special keyboard scanning function that is connecting a resistor (typically
is 560 Kohms) on keyboard scan pin to select many telephone specifications. The specifications are described
as following :
a. Mode
ROW1 Mode
R-Vdd 20 PPS
NR Tone
R-Vss 10 PPS
c. Flash time
ROW3 ROW4
NR NR
NR R-Vss
R-Vss
NR
R-Vss R-Vss
e. Lock number
COL2 COL3
NR NR
NR R-Vss
R-Vss
NR
R-Vss R-Vss
Tf (ms)
600
100
80
300
Lock number
none
0
9
0.9
b. M/B ratio
ROW2 MBR (%)
NR 40:60
R-Vss
33:66
d. Lock control method
COL1
Control method
R-Vdd
key lock
NR none lock
R-Vss
password lock
Normal dialing
Directly keying digital key on keyboard which number can be dialing output and stored in LNB memory
automatically. Operating procedure described as follow :
• To select Pulse or Tone mode.
• Off-hook or turn on HF function.
• Keying d1, d2, .. , dn. The “d” expressed digital keypad that included 1~9, *, 0, #, P, and P→T keys. The “n”
expressed unlimited.
• The numbers d1, d2, .. , dn will be dialed out in Pulse or Tone mode as selection.
LNB redial memory
Storing:
In normal dialing mode, every digital key was entry which number will be stored in LNB memory
automatically. If entry digits are more than 32 digits, the redial function of LNB memory will be disabled.
Otherwise, these numbers stored in LNB memory can be redial output.
* This specification are subject to be changed without notice.
10.1.1997 5
5 Page 
EM91401 SERIES
TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE
AND DUAL-TONE MELODY GENERATOR
ELECTRICAL CHARACTERISTIPCreliminary
(Ambient
temperature
is
25°C,
V =2.5V
DD
unless
otherwise
noted,
all
voltages
referenced
to
Vss,Fosc=3.579545
MHz)
Parameter
Sym. Min. Typ. Max. Unit
Condition
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
Tdb - 20 - ms
Fkt
Tkt
Tp
Tpt
Tf
PSR
MBR
Tidp
IoL
Vdc
Vdtmf
Twist
THD
ZL
Tp
Titp
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-0.2
0.5
142
1
-
5
96
96
600
30
3.6
3.6
600
100
80
300
20
10
40:60
33:66
800
500
-
-
160
2
-30
-
98
98
- Hz
- ms
- sec.
- sec.
- Row3B, Row4B=NR, NR
- ms Row3B, Row4B=NR, R-Vss
- Row3B,Row4B=R-Vss, NR
- Row3B,Row4B=R-Vss,R-Vss
- pps Row1 = R-Vdd
- Row1 = R-Vss
- % Row2 = NR
- Row2 = R-Vss
- ms PSR = 10 pps
- PSR = 20 pps
- mA Vdtmf = 0.5 V
0.75 Vdd Vdd = 2.0V ~ 5.5V
180 mVrms Row group
3 dB Column - Row
-23 dB RL = 5 KΩ
- KΩ THD < − 23dB
100
100 ms Memory dialing
(-23.3)
(dBm)
○ ○ ○ ○ ○ ○ ○ ○ ○○○○○○○○○○○
Vmtac 48 53 58 mVrms Vdd =2.0V ~ 5.5V
(-25.3)
(dBm)
○ ○ ○ ○ ○ ○ ○○○○○○○○○○○○○
Vstac 37 42 47 mVrms Vdd =2.0V ~ 5.5V
Thdrdb - 93 - ms
Tbit 3.8 3.9 4.1 ms
Tdly - 300 - ms
* This specification are subject to be changed without notice.
10.1.1997 11
11 Page | ||
| Páginas | Total 23 Páginas | |
| PDF Descargar | [ Datasheet EM91401C.PDF ] | |
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