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EM91450B 데이터시트 PDF




ELAN Microelectronics Corp에서 제조한 전자 부품 EM91450B은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


PDF 형식의 EM91450B 자료 제공

부품번호 EM91450B 기능
기능 TONE/PULSE DIALER WITH LCD INTERFACE AND I.P.P. DETECT FUNCTION
제조업체 ELAN Microelectronics Corp
로고 ELAN Microelectronics Corp 로고


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EM91450B 데이터시트, 핀배열, 회로
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




EM91450B pdf, 반도체, 판매, 대치품
Symbol
HKS
PO
HDO
SDO
DRING
RMUTE
EM91450 SERIES
TONE/PULSE DIALER WITH LCD INTERFACE
AND I.P.P. DETECT FUNCTION
Function
Control signal inputs pin that is corresponding hook switch status. When handset was
left from cradle, this pin must be connected to "Low" level to operate all functions.
Otherwise, this pin must be connected to "High" level to disable all function and
prevent power consumption.
Pulse signal outputs pin that is NMOS open-drain output structure. Normally, this pin
stays "High impedance" level. In Pulse dialing mode and keypad was entry. This pin
will output pulse trains signal that is corresponding to keyboard 0 .. 9 keys.
Hold function output that is CMOS structure.Normally, this pin stays "Low" level.
When Hold function is executing, this pin will output "High" level. This pin is
designed to drive LED or peripheral circuit to indicate line is at Hold status.
SDO function output that is NMOS open-drain structure. When there is a valid entry
on keyboard, this pin will output a serial data. This serial data is designed to drive LCD
driver to display dialing number on LCD screen or drive voice synthesizer to announce
dialing number to speaker.
The ring signal detect input pin.
While the Tel-ring is incoming, this pin must be connected to "Low" with delay to
indicate the ringing . Otherwise, this pin must be connected to "High" level .
Ring mute output pin that is NMOS open-drain structure. The RMUTE pin is
designed to control microphone of handset to prevent the illegal dialing from pocket
dialer. If the DRING pin is at "High" level , then Off-Hook or turn on Handfree , this
pin will output "Low" level. In other words, the DRING pin is used to check the phone
that receives an incoming call (DRING =Low input) or make an outgoing call
(DRING= High input) . If the phone user make an outgoing call ,then RMUTE pin
activated to prevent the illegal dialing from pocket dialer in the particular application.
The RMUTE can be restored to "High" level when the first key entry is not the
optioned lock-number .
* This specification are subject to be changed without notice.
2.10.1999 4

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EM91450B 전자부품, 판매, 대치품
EM91450 SERIES
TONE/PULSE DIALER WITH LCD INTERFACE
AND I.P.P. DETECT FUNCTION
• Turn on Handfree (HF) function. (HFO pin switched to "High")
Special Note:
A 300 ms delay time (Tdly) at the first Off-Hook or turn on Handfree that is a special designed to avoid a rapid
key entry (dummy number ) in this time duration ,and a long distance call number follows. For example,
Off-Hook , "3" ,............ , "0" ,1,2,3......
Dummy key Lock number key
The dummy number "3" is not detected by the centered office or PABX ,but the following numbers "0" ,1,2,3...
long distance call can be dialed out normally since the leading number "3" is not the Lock-number defined in
EM91450 series. To prevent the unavoidable long distance call, then EM91450 inhibits the key entry during
Tdly.
Operating flow chart
HF
HF
HF
XMUTE =Hi
(1)
On-hook State
XMUTE=Lo
HKS=Lo
HKS=Hi
(7)
IPP State
HKS=Lo
(4)
On-hook
Hand-free State
HKS=Lo
(2)
Off-hook State
HKS=Hi
(3)
Off-hook
HF
HF
HD
HD HF
Hand-free State
HD
(6)
HD On-hook
Hold-line State
HKS=Hi
HKS=Lo
HF
HD
(5)
Of f-hook
Hold-line State
<Note> : HF = Handfree
HD = Hold
Truth table
Operating state
(1) On-hook, idle state
(2) Off-hook line
(3) Off-hook, HF line
(4) On-hook, HF line
(5) Off-hook, HD line
(6) On-hook, HD line
(7) IPP state
Input
HKS
H
L
L
H
L
H
H
I/O
XMUTE
H/F
H/F
H/F
H/F
L/L
L/L
L/L
Pin level
PO
F
F
F
F
F
F
F
Output
HFO
L
L
H
H
L
L
H
HDO
L
L
L
L
H
H
H
DTMF
-
-
-
-
-
-
active
Note : F=floating (high impedance); H=logic "High"; L=logic "Low" level.
XMUTE are I/O port, so Input will effect state situation change, and which state dialer stay will
effect output level.
* This specification are subject to be changed without notice.
2.10.1999 7

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관련 데이터시트

부품번호상세설명 및 기능제조사
EM91450A

TONE/PULSE DIALER WITH LCD INTERFACE AND I.P.P. DETECT FUNCTION

ELAN Microelectronics Corp
ELAN Microelectronics Corp
EM91450B

TONE/PULSE DIALER WITH LCD INTERFACE AND I.P.P. DETECT FUNCTION

ELAN Microelectronics Corp
ELAN Microelectronics Corp

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