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PDF EM91450B Data sheet ( Hoja de datos )
| Número de pieza | EM91450B | |
| Descripción | TONE/PULSE DIALER WITH LCD INTERFACE AND I.P.P. DETECT FUNCTION | |
| Fabricantes | ELAN Microelectronics Corp | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de EM91450B (archivo pdf) en la parte inferior de esta página. Total 24 Páginas | ||
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EM9E1M4951045S0ESRERIEIESS
TONE/PUTOLNSEE/PDUILASLEEDRIAWLEIRTWHILTHCDLCIDNITNETRERFFAACCEE
AND IA.PN.DP.I.DP.EP.TDEECTETCFTUFNUCNCTTIOIONN
GENERAL DESCRIPTION
The EM91450 is a series of tone/pulse switchable dialers that is composed of T/P dialer. The EM91465 provide
modern LCD driver's series data output port, which can display modern function operating icons. The
EM91450 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, ring detector and SDO (Serial Data Output) functions are provided
in advance version. 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 and modern function operating icons
can be displayed on LCD screen with LCD driver (EM32100 or EM32117 ). The EM91450 has a special I.P.
P. detect function (Illegal Parallel Phone Detect) can prevent the illegal connect external Phone. The I.P.P. will
detect the illegal user. When illegal user pickup phone, the function will alarm and send the alarm signal to the
telephone line to interfer the illegal dialing.
FEATURES
• I.P.P. detect function prevents the illegal connect external phone.
• SDO function supports LCD driver and voice synthesizer to indicate dialing numbers and function operat-
ing icons.
• Lock function provides conventionality key lock and password lock operations.
• Ring detector is designed to prevent illegal dialing from pocket dialer.
• Line hold function is designed for stopping conversation temporality.
• 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.
• 13 set one touch or (3 set one touch and 10 set two touch) repertory memory, each one can hold data up to
16 digits.
• 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 HOLD
EM91450A
√√
EM91450B
√√
EM91450C
√√
√
EM91450D
√√
√
Note : PDP = Pocket Dialer Prevented
: I.P.P. detect=Illegal Parallel Phone Detect.
I.P.P.
√
√
√
√
* This specification are subject to be changed without notice.
LOCK
√
√
√
√
HF SDO(LCD)
√
√√
√√
PDP
√
2.10.1999 1
1 page  
EM91450 SERIES
TONE/PULSE DIALER WITH LCD INTERFACE
AND I.P.P. DETECT FUNCTION
FUNCTION DESCRIPTIONS
Dialing signal selection
The EM91450 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.
2.10.1999 5
5 Page 
EM91450 SERIES
TONE/PULSE DIALER WITH LCD INTERFACE
AND I.P.P. DETECT FUNCTION
ABSOLUTE MAXIMUM RATINGS(Ambient temperature is 25 oC, all voltages referenced to VSS)
Items
Sym.
Rating
Unit
Power supply voltage
Input voltage range
Operating temperature
Storage temperature
Power consumption
VDD
VIN
TOPR
TSTO
PD
DC ELECTRICAL CHARACTERISTICS
6.0 Vdc
VSS-0.3V ~ VDD+0.3V
0 ~ 50
-55 ~ 125
500
V
V
oC
oC
mW
(Ambient temperature is 25 oC, VDD=2.5V unless otherwise noted, all voltages referenced to VSS, Fosc=3.579545 MHz)
Parameter
Sym. Min. Typ. Max. Unit Condition
Operating voltage
Operating current(HKS=0)
Memory retention current
Standby current
Pulse
Tone
Pulse
Tone
HKS=1
HKS=0
HKS=1
HKS=0
Idd
Imrt
Istby
2.0 -
2.0 -
- 0.15
- 0.3
--
--
-1
-
- 10
5.5 V
5.5
0.3 mA
0.5
0.1 uA
0.1
10 uA
0.1
30
unload
with pull up/down
resistor * 8
HKS=1,Vdd=1V
unload
with pull up/down
resistor * 8
HKS, HFI & DRING
pins: input voltage
Xmute pin : Schmitt triggers
(input pin)
HFO & HDO pins source current
ViH
ViL
VH-L
VL-H
IoH
0.8VDD
VSS
VSS
0.9VDD
0.2
-
-
-
-
-
VDD
0.2VDD
0.1VDD
VDD
-
V
V
V
mA
at idle state
Vo = 2.0 V
PO, HFO, XMUTE, RMUTE
IoL -0.2 -
- mA Vo = 0.5 V
& SDO pins: sink current
PO, XMUTE, RMUTE and SDO
IoH - - 0.01 uA Vo = Vdd
pins: leakage current
HFI pin input resistance
Rhfi
- 200
- KΩ
Vhfi = Vss
Keyboard scanning pins
IoH
2 10
50 uA
Vksn=Vss
output current (except COL4/KT)
IoL 200 400 800 µA
ksn=Vdd
COL4/KT source current
IoH 0.2 -
- mA
Vo=2.0V
sink current
IoL 0.2 -
-
Vo=0.5V
DTMF pin: sink current
IoL -0.2 -
- mA
Vdtmf = 0.5 V
DTMF signal DC level
Vdc 0.5 -
0.75 Vdd Vdd = 2.0V ~ 5.5V
DTMF signal: ac level
Vdtmf 142 160
○ ○ ○ ○ ○ ○ ○ ○ ○○○○○○○○○○○○
pre-emphase
○ ○ ○ ○ ○ ○ ○ ○ ○○○○○○○○○○○○
Twist 1 2
distortion
THD - -30
○ ○ ○ ○ ○ ○ ○ ○ ○○○○○○○○○○○○
load resistance
ZL 5 -
Distortion(dB)=20 log
{[V12+V22+V32 ..... +Vn2)1/2]/[(VL2+VH2)1/2]}
VL, VH =ROW group and column group signal.
V1, V2, V3 .... Vn = Harmonic signal (BW=300Hz~3500Hz)
* This specification are subject to be changed without notice.
180
3
-23
-
mVrms
dB
dB
KΩ
Row group
Column - Row
ZL = 5 KΩ
THD < − 23dB
2.10.1999 11
11 Page | ||
| Páginas | Total 24 Páginas | |
| PDF Descargar | [ Datasheet EM91450B.PDF ] | |
Hoja de datos destacado
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| EM91450A | TONE/PULSE DIALER WITH LCD INTERFACE AND I.P.P. DETECT FUNCTION | ELAN Microelectronics Corp |
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