EM91850 tone/pulse switchable dialer with Last Number Redail (LNB) SAV

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EM91850 tone/pulse switchable dialer with Last Number Redail (LNB) SAV

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EM91850 TONE/PULSE DIALER WITH REDIAL VOLUME CONTROL FUNCTION
EM91850 tone/pulse switchable dialer with Last Number Redail (LNB) SAVE function, which fabricate CMOS technology with wide operating voltage both tone pulse mode. EM91850 consumes very memory retention current hook state. EM91850 provide necessary functions telephone application environment, such pulse dialing, tone (DTMF) dialing, handfree dialing. Beside this, hold mute redial function provide particular operation. redial mode EM91850 auto insert pause time application PABX system. EM91850 also have special used tocontrol receive volume amplify circuit. FEATURES Volume Control Function. Redial Function. Flash available have multiple Flash time selected. Auto Insert Pause Time. Tone/Pulse Switchable. Pulse mode fixed 10PPS. Pulse tone provided PABX operation. Many options selected option. Mode Pulse, Tone ratio 40:60 33:66 Auto insert pause time enable disable digits SAVE function. digits redial function. Mixed cascaded dialing. Hold Mute function. Hand Free dialing. Tone duration inter -tone pause fixed Flash pause time fixed Pulse Tone pause time fixed 3.6sec. Uses 3.579545 crystal ceramic resonator (with built-in capacitor, need extra capacitor). Package
Total System
Operating voltage 2.0V 5.5V Operating current Tone mode (typical) Pulse mode 0.15 (typical) Standby current 0.01 typical (max.) single clock 3.579545 crystal
This specification subject changed without notice.
4.28.1999
EM91850 TONE/PULSE DIALER WITH REDIAL VOLUME CONTROL FUNCTION
ASSIGNMENTS
EM91850
K6/XMUTE K4/MUTEO XOUT
K1/HDO DTMF
DESCRIPTIONS
Symbol K1/HDO Function board scan pins, scans ripple way. These pins output signal periodically board scan. This functions. Normally this will board scan pins function same K1~K6. Hold condition this will stay "High" level control Hold circuit scan input key. Hold condition will allow keying except Hook switch. This functions Normally this will board scan pins function same K1~K6. MUTE condition this will stay "High" level output signal with inverse scan control MUTE circuit scan input input will release MUTE condition. This functions Normally this will board scan pins function same K1~K6. Tone/Pulse dialing Mute signal output pin. This will switch "High" level during Tone/Pulse dialing hold function. Otherwise, this level stays "Low". Positive negative power supply input Oscillator input output pins built capacitor it's need external capacitor. 3.579545 crystal must crossed between Xout. Handfree function Input accepts rising edge signal turn "on" turn "off" handfree function. This hysteresis input structure built-in pull down resistor (typically Handfree outputs that designed control telephone line on-hook dialing control speakerphone circuit handfree conversation. When handfree function executed, this will switch "High". Otherwise, this stays "Low" level. Hook Switch detects input which hysteresis input structure without internal pull resistor. DTMF (Dual Tone Multi-Frequency) output pin, tone dialing mode, this will output DTMF signal that corresponding board 0~9, key. Pulse signal output that NMOS open-drain. This pulse dialing. This output "Low" during pulse dialing blank duration Flash operation active, otherwise will "High impedance". Volume output which open drain structure. Normally this will stay "High Impedance". When Volume active dialer OFFHOOK mode operting then this will output "Low".
4.28.1999
K4/MuteO
K6/XMUTE
VDD, Xout
DTMF
This specification subject changed without notice.
EM91850 TONE/PULSE DIALER WITH REDIAL VOLUME CONTROL FUNCTION
Assignment
SAVE
MUTE
R_option
XMUTE
MuteO
R_option
KEYBOARD DESCRIPTION
0~9,*,# SAVE MUTE Description Digit key. Flash key, flash time F1=600ms F2=300ms F3=100ms. Pulse mode, this mean Pulse Tone function key. Redial Redial key. Pause key. Hold function key, hold mode "HD" will idle On-hook state. Handfree function key. SAVE function key. Volume key. MUTE key. When this pressed MuteO output will "high", key-in will release mute.
This specification subject changed without notice.
4.28.1999
EM91850 TONE/PULSE DIALER WITH REDIAL VOLUME CONTROL FUNCTION
FUNCTION DESCRIPTIONS
Dialer Option selection EM91850 incorporated special keyboard scanning function that connecting resistor typically keyboard scan select many telephone specifications. specifications described follow ratio ratio 40:60 R-Vss 33:66 Auto Insert Pause time Auto Insert Pause time Disable R-Vss Enable Mode R-Vss
Mode Tone Pulse
Normal Dialing Press digital directly keyboard which number dialing stored memory auto matically. Operating procedure described following: select Pulse Tone mode. Off-Hook turn function. Keying d1,d2,.dn. expressed digital pressed that include 1~9, keys. expressed unlimited. numbers d1,d2,., will dialed Pulse Tone mode selection. Redial Function Storing normal dialing mode, every digital entry which number will stored memory automatically. entry digits more than digits, redial function memory will disabled, otherwise, these numbers stored memory redial output. Redialing EM91850 provide Redial Redial function Redial function Off-Hook normal dialing directly keying ON-OFF Hook once) key-in "RD" keyboard. numbers stored memory will dialed out. Redial function Off-Hook normal dialing, busy, press "RD" directly then line will broken about with redial pause time dial numbers stored memory automatically.
This specification subject changed without notice.
4.28.1999
EM91850 TONE/PULSE DIALER WITH REDIAL VOLUME CONTROL FUNCTION
Auto Insert Pause Time Function
EM91850 Provides function Auto Insert Pause Time function PABX system user. PABX system, usually special number identify phone want dial just internal phone. between first second number, PABX system will switch central office, that will second switch time. auto insert pause time function will auto insert pause time between first second digit redialing mode. This function provide pause time wait PABX switch Central Office. fact, pause time record waiting time last dialing between first second digit. auto insert pause minimum duration equal second, maximun duration equal second, pause duration scale second. time during user keying first second digit longer than second, auto insert pause time will limited second. this function, redial correct number PABX system.This function select enable disable R_option. Pause(P) operation Pause(P) designed support pause operation dialing duration. stored memory will occupy digital position. select Pulse Tone mode. Off-hook(or turn function), push (d1, d2,.dn,, ,kn). These numbers will dialed following sequence d2,.dn, pause Time) SAVE redial memory SAVE memory designed EM91850 support digits capacity buffer second redial, pager, special memory memo other system applications. Storing EM91850 support operating methods store numbers into SAVE redial memory. Method select Pulse Tone mode. Off-hook(or turn function), push numbers d2,., will dialed Pulse Tone mode selection. After been dialed push [ST]. SAVE key. keying numbers more than digits that content SAVE memory updated. Otherwise, these numbers will stored into SAVE memory. Noted allows omitted. SAVE buffer length digits number Method Off-hook turn function), push [ST], SAVE. keying over digits, numbers will stored SAVE redial memory automatically. Dialing select Pulse Tone mode. Off-hook(or turn function after executing Flash function), first push SAVE key. numbers stored SAVE memory will dialed Pulse Tone mode selection.
This specification subject changed without notice.
4.28.1999
EM91850 TONE/PULSE DIALER WITH REDIAL VOLUME CONTROL FUNCTION
Mixing dialing LNB=7,8,9 off-hook state, "RD", then LNB=7, number will dialed out. Pulse Tone(*/T) operation Pulse Tone(*/T) designed support toll dialing (long distance call) PABX system operation. "*/T" stored memory will occupy digital position. select Pulse mode. Off-hook(or turn function), push d2,.dn, */T, .,kn. These numbers will dialed following sequence d2,.dn, Tpt, (Tpt Pulse Tone pause time) (pulse mode) (tone mode) Flash(F=F1,F2,F3) operation Flash designed break telephone line temporarily. After depressed, this dialer will send flash signal break line reset condition. Flash's break time dependent which pressed, F1=600ms, F2=300ms, F3=100ms. Handfree (HF) function Handfree function provided EM91850 support on-hook dialing loudspeaker application which turn "on" "off" pressed again "HF" key. During handfree function executed, switched "high". Otherwise stays "low" level. following operations turn Handfree func tion (HFO return "Low"). On-Off hook once. Pressed "HF" Turn Hold (HD) function.(HDO switched "High") Hold (HD) function Hold function designed stop conversation temporarily. off-hook state function turned on), press keyboard, Hold function turned "on" (HDO switched "High"). following operations turn Hold function (HDO switched "Low"). On-Off hook once. press back idle On_Hook state Turn Handfree (HF) function.(HFO switched "High") Hold state board will disable except "HF" "HD" switch Mute function EM91850 provide mute function mute microphone antler off-hook turn state. When keyin "MUTE" key, "MuteO" will become "High" mute microphone. key-in will release mute mode operating correct key.
This specification subject changed without notice.
4.28.1999
EM91850 TONE/PULSE DIALER WITH REDIAL VOLUME CONTROL FUNCTION
Volume function
EM91850 provide Volume function control speech network adding receiving volume. Except idle On-Hook state, Volume function will working effect matter what state Volume function toggle structure. Every time touch will inverter condition HLHL.). Volume will active release each time keying only when dialer back idle On_Hook state then Volume function will force release. This solution protect user will hurt loud volume. Although Volume state will change Off_Hook operation dialer mode then Volume outpout (VAO) will inhibited. Noted Except dialer back idle state, other operate will reset volume situation include Flash volume situation will hold until dialer back idle.
This specification subject changed without notice.
4.28.1999
EM91850 TONE/PULSE DIALER WITH REDIAL VOLUME CONTROL FUNCTION
OPERATING FLOW CHART
On_Hook state
HKS=L
On_Hook state
HKS=H Off_Hook state
HKS=L
On_Hook
HKS=H
Off_Hook HKS=H HKS=L
Off_Hook
<Note> HF=Handfree
HD=Hold
Truth Table Operating state (1)On-hook, idle state (2)Off-hook line (3)Off-hook, line (4)On-hook, line (5)Off-hook, line (6)On-hook, line Input Output level XMUTE
Note floating (high impedance) logic "High"; logic "Low" level. doing R-option
This specification subject changed without notice.
4.28.1999
EM91850 TONE/PULSE DIALER WITH REDIAL VOLUME CONTROL FUNCTION
ABSOLUTE MAXIMUM RATINGS(Ambient temperature 25oC, voltages referenced VSS)
Items Power supply voltage Input voltage range Operating temperature Storage temperature Power consumption Sym. TOPR TSTO Rating VSS-0.3V VDD+0.3V Unit
RECOMMENDED OPERATING CONDITIONS
Supply voltage range from fc=3.58 Operation frequency: 3.58 crystal.
D.C. ELECTRICAL CHARACTERISTICS
(VSS=0V; TOPR=0oC 70oC, VDD=3V unless otherwise noted)
Parameter Operating voltage Tone Pulse Memory retenion
Sym. Min. Istby Imrt -0.2
Typ. Max. Unit 0.001 0.15 0.15 0.001 -350 -350 -0.01 -420 -420
Condition unload
Standby current Operating current Memory retention current HKS, Input voltage Drive current Sink current pull down resistor Leakage current Sink current MuteO, HDO, XMUTE Drive current Sink current Output current Sink current Tone Pulse
Idle On_Hook state
HKS=1,Vdd=1V Schmitt trigger Vo=2.5V Vo=0.5V Vxmute=Vdd Vxmute=0.5V Vo=2.5V Vo=0.5V Vo=2.5V Vo=0.5V Vo=0.5V
-270 -270
This specification subject changed without notice.
4.28.1999
EM91850 TONE/PULSE DIALER WITH REDIAL VOLUME CONTROL FUNCTION
DTMF CHARACTERISTICS (VSS= VDD= Topr 70oC)
Symbol Twist level Dist level Sink current Load resistor Minimum tone duration Minimum intertone pause Description Twist=20 LOG(COL/ROW) Vdd=2.0V~5.5V Distortion group Vdtmf=0.5V Dist<-23dB redial Titp redial Min. 0.55 Typ. Max. Unit mVrms
ACTUAL FREQUENCY OUTPUT fosc =3.579545
Standard 1209 1336 1477 Output 1216 1332 1472 Deviation +0.28 -0.52 -0.47 +0.74 +0.57 -0.30 -0.34
ELECTRICAL CHARACTERISTIC
(VDD-VSS=3.0V,Fosc=3.58 MHz)
Parameter Keyin release debounce Pulse rate Make/Break ratio Inter-digit pause time Pause time Pulse tone time Flash break time
Sym. Tidp
Min.
Typ. 40:60 33:66 1/32 0.25 2.25
Max. Unit 3100
Condition
pin=NR pin=R-Vss
Flash Pause time Tone duration redial Break time redial Pause time Scan wave width Scan wave period board scan Period Auto Insert Pause Pre-Mute time
Tksp Taip
This specification subject changed without notice.
4.28.1999
EM91850 TONE/PULSE DIALER WITH REDIAL VOLUME CONTROL FUNCTION
TIMING DIAGRAM
XMUTE DTMF
Titp
XOUT Figure Tone Mode operating Timing
XMUTE DTMF XOUT Tidp Tidp Tidp
Figure Pulse Mode operating Timing
This specification subject changed without notice.
4.28.1999
EM91850 TONE/PULSE DIALER WITH REDIAL VOLUME CONTROL FUNCTION
Pulse Tone
XMUTE DTMF XOUT
Figure Pulse Tone operating Timing
dial inhibited
XMUTE XOUT
Figure Flash operating Timing
Tone mode
Pulse mode
XMUTE DTMF XOUT
Figure Pause operating Timing
This specification subject changed without notice.
4.28.1999
EM91850 TONE/PULSE DIALER WITH REDIAL VOLUME CONTROL FUNCTION
Taip DTMF XOUT
Dialing 057797 LNB=057797 Taip timng will store Then Redial will auto insert Taip timing between number
Taip
Titp DTMF XOUT
Figure Auto Insert Time operating Timing
(LNB=1 XMUTE XOUT Figure Redail operating Timing( Pulse Mode
This specification subject changed without notice.
4.28.1999
EM91850 TONE/PULSE DIALER WITH REDIAL VOLUME CONTROL FUNCTION
(LNB=1 XMUTE DTMF XOUT
Figure Redial operating Timing( Tone Mode
LNB= XMUTE XOUT
Figure Redial operating Timing( Pulse Mode
LNB= XMUTE DTMF XOUT
Figure Redial operating Timing( Tone Mode
This specification subject changed without notice.
4.28.1999
EM91850 TONE/PULSE DIALER WITH REDIAL VOLUME CONTROL FUNCTION
XMUTE Torf XOUT Trdp
Figure Handfree Mode Redial operating Timing( Pulse Mode
XMUTE DTMF Torf XOUT Trdp
Figure Handfree Mode Redial operating Timing( Tone Mode
This specification subject changed without notice.
4.28.1999
EM91850 TONE/PULSE DIALER WITH REDIAL VOLUME CONTROL FUNCTION
K1/HDO XMUTE/K6 K2~K6 XOUT
Figure Handfree Hold operating Timing
MuteO/K4 XMUTE DTMF XOUT Figure Mute operating Timing
MUTE
This specification subject changed without notice.
4.28.1999
EM91850 TONE/PULSE DIALER WITH REDIAL VOLUME CONTROL FUNCTION
Tksp
Figure board scan Timing
Figure Hold active board scan Timing
This specification subject changed without notice.
4.28.1999
EM91850 TONE/PULSE DIALER WITH REDIAL VOLUME CONTROL FUNCTION
Tksp
Figure Mute active board scan Timing
Tksp
Figure XMUTE active board scan Timing
This specification subject changed without notice.
4.28.1999
OFF-HOOK ON-HOOK
HOOK-SW I_LOOP 220K 1N4148 100K C945 /VAO MuteO
1N4148
100K 1N4148 SPEAK_Power 470K DTMF
240K
RING
16V/1W
SPEECH
XMUTE
Auto Release HOLD Function Circuit
1N4148 0.1u 1N4148 1N4148 100K C945
470u
Network
470K 470K C945 C945
220K
APPLICATION CIRCUIT CONTROL CIRCUIT
This specification subject changed without notice.
100K 1N4148
EM91850
100K
K6/XMUTE K4/MuteO XOUT K1/HDO DTMF
1N4148 1N4148 100K
KEYBOARD
3.58M
EM91850 TONE/PULSE DIALER WITH REDIAL VOLUME CONTROL FUNCTION
4.28.1999
EM91850 TONE/PULSE DIALER WITH REDIAL VOLUME CONTROL FUNCTION
APPLICATION CIRCUIT KEYBOARD R_OPTION
SAVE
MUTE
560K
R_Option
This specification subject changed without notice.
4.28.1999

EM91850 tone/pulse switchable dialer with Last Number Redail (LNB) SAV

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