EM91420A Datasheet PDF - ELAN Microelectronics Corp
| Part Number | EM91420A | |
| Description | TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR | |
| Manufacturers | ELAN Microelectronics Corp | |
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There is a preview and EM91420A download ( pdf file ) link at the bottom of this page. Total 24 Pages | ||
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EM9E1M4290142S0ESRERIEIESS
TONE/PULTSOENSEW/PUITLSCEHSAWBITLCEHDAIBALLE EDRIAWLEIRTWHILTHCDLCIDNITNETRERFFAACCEE
AND DUAANDL-DTUOANLE-TOMNEELMOEDLYODGYEGNEENRERAATTOORR
GENERAL DESCRIPTION
The EM91420 is a series of tone/pulse switchable dialers that is composed of T/P dialer and T/P dialer with
20-set memories. The EM91420 series provides 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.
• 20-set three 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
EM91420A
√√
EM91420B
√√
EM91420C
√√
EM91420D
√√
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
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EM91420 SERIES
TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE
AND DUAL-TONE MELODY GENERATOR
FUNCTION DESCRIPTIONS
Dialing signal selection
The EM91420 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
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for EM91420A electronic component. |
| Information | Total 24 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ EM91420A.PDF Datasheet ] | |
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Featured Datasheets
| Part Number | Description | MFRS |
| EM91420A | The function is TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR. ELAN Microelectronics Corp | |
| EM91420B | The function is TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR. ELAN Microelectronics Corp | |
| EM91420C | The function is TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR. ELAN Microelectronics Corp | |
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