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PDF MK53761 Data sheet ( Hoja de datos )
| Número de pieza | MK53761 | |
| Descripción | REPERTORY DIALER | |
| Fabricantes | ST Microelectronics | |
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MK53761
. SINGLE CHIP DTMF AND PULSE DIALER
. SOFTSWITCH CHANGES SIGNALING MODE
FROM PULSE TO TONE
. NINE NUMBER REPERTORY PLUS RECALL
OF LAST NUMBER DIALED (18 digits each)
. FLASH KEY INPUT INITIATES TIMED HOOK
FLASH
. 8 TONE PER SECOND DIALING IN TONE
MODE AND 10 PPS IN PULSE MODE
. DTMF ACTIVE UNTIL KEY RELEASE
. MINIMUM DTMF DURATION/SEPARATION
GUARANTEED (74/54 ms)
. PACIFIER TONE PROVIDES AUDIBLE INDI-
. CATION OF VALID KEY INPUT FOR NON-
DTMF KEY ENTRIES
POWERED FROM TELEPHONE LINE, LOW
OPERATING VOLTAGE FOR LONG LOOP AP-
PLICATIONS
DES CRI P TI O N
The MK53761 is a Silicon Gate CMOS IC that pro-
vides necessary signals for either DTMF or loop dis-
connect (pulse) dialing. The MK53761 buffers up to
18 digits into memory that can be later redialed with
a single key input. Up to nine repertory numbers
may be stored. Users can store all 12 signaling keys
and access several unique functions with single key
entries. These functions include : Last Number Di-
aled (LND), Softswitch, and Flash. Figure 2 shows
the keypad configuration.
A LND key input automatically redials the last num-
ber dialed. The PROG key provides an easy way to
program a number into any memory location (1-9)
whether on-hook on off-hook. The MEM key allows
easy redialing of the number stored in memory lo-
cations (1-9).
The FLASH key simulates a 560 ms hook flash to
transfer calls or to activate other special features
provided by the PABX or a central office.
July 1993
REPERTORY DIALER
DIP18
SO20
ORDERING NUMBERS :
MK53761N00
MK53761D
Figure 1 : Pin Connections.
V+
MODE
C1
C2
C3
V-
OSC1
OSC2
C4
1 18
2 17
3 16
4 15
5 14
6 13
7 12
8 11
9 10
D93TL017
DIP18
PULSE OUTPUT
HKS
R1
R2
R3
R4
MUTE OUTPUT
PACIFIER TONE/
CHIP DISABLE
DTMF OUTPUT
V+
MODE
C1
C2
C3
V-
OSC1
OSC2
C4
N.C.
1 20
2 19
3 18
4 17
5 16
6 15
7 14
8 13
9 12
10 11
D93TL018
SO20
PULSE OUTPUT
HKS
R1
R2
R3
R4
MUTE OUTPUT
PACIFIER TONE/
CHIP DISABLE
DTMF OUTPUT
N.C.
1/11
1 page  
Figure 7 : Tone Mode Timing.
MK53761
Notes : 1. For this example, key entries are ≤ 75 ms, but ≥ 32 ms.
2. MUTE goes active after any key is depressed.
Figure 8 : Pulse Mode Timing.
5/11
5 Page 
MK53761
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for
the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its
use. No license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifica-
tions mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information pre-
viously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or
systems without express written approval of SGS-THOMSON Microelectronics.
© 1994 SGS-THOMSON Microelectronics - All Rights Reserved
SGS-THOMSON Microelectronics GROUP OF COMPANIES
Australia - Brazil - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands
Singapore - Spain - Sweden - Switzerland - Taiwan - Thaliand - United Kingdom - U.S.A.
11/11
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