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PDF MA5883 Data sheet ( Hoja de datos )
| Número de pieza | MA5883 | |
| Descripción | 20 Memory LD/DTMF Switchable Dialler Chip | |
| Fabricantes | Zarlink Semiconductor | |
| Logotipo |  |
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THIS DOCUMENT IS FOR MAINTENANCE
PURPOSES ONLY AND IS NOT
RECOMMENDED FOR NEW DESIGNS
1 page  
MA5883
DTMF Calls
If a call contains the digits 5 or #, only those digits dialled
prior to the first press of either 5 or # will be retained in the
LNR store. This feature also ensures security for PIN codes
whilst allowing exchange facility codes (for example) to be
retained.
Memory Dialling
The MA5883 provides 20 memories, each of which has a
capacity of 24 digits. There are 10 dedicated memory keys and
a REDIAL key which allows the other 10 memories to be
dialled. The memories can store pauses and digits to be
dialled in LD, DTMF or mixed modes.
www.DataShPereot4gUr.acommming Memories
The MA5883 must be “off-hook” and idle:
1. Press the STORE key.
2. Press key S0-S9 or REDIAL + digit 0-9 indicating the
memory to be programmed.
3. Enter digits to be stored (no digits will be dialled whilst
programming).
4. To finish programming the memory either press the
STORE key again or go “on-hook”.
5. Repeat to programme other memories.
If more than 24 digits are entered while programming a
memory, then the memory will be cleared until re-
programmed. If any “non-valid” keys are pressed during
programming (e.g. LNR, TBR) they will be ignored.
Mixed Mode Numbers and Pauses in Memory
Mixed mode (i.e. LD + DTMF numbers are easily
programmed into memory. The SELECT pin must be set to
one of the ‘LD + DTMF’ modes (as it would be when dialling a
mixed mode number), then the store is programmed using the
same procedure as above. The first press of */# will be stored
as a ‘change to DTMF’ and this will cause all subsequent digits
to be sent in DTMF when redialling from memory.
Similarly pauses can be stored in memory by pressing the
PAUSE key in the appropriate position when programming.
When redialling from memory, both pauses and LD to
DTMF changeovers will cause dialling to halt temporarily until
the user presses either the PAUSE/CONT key or the REDIAL
key. The exception to this rule is when an LD to DTMF
changeover is stored in the first memory location: In this case,
DTMF dialling will occur immediately when memory dialling is
invoked - this allows DTMF codes to be easily stored and sent,
even in a telephone where the normal dialling mode is LD.
It should be noted that a pause or an LD to DTMF
changeover each require one memory location.
Dialling from Memories
The MA5883 must be “off-hook” and idle:
1. Press the appropriate memory key S0-S9 or REDIAL +
digit 0-9. Dialling will now start.
2. If dialling halts due to a pause or an LD to DTMF
changeover in the memory, the PAUSE OUT pin will go high
(logic ‘1’). Further dialling can be resumed either by pressing
the PAUSE/CONT key, or, alternatively the COLUMN 4 pin
can be pulled low (for a minimum of 14ms) to achieve the same
result, thus allowing an external timer circuit to be used. The
PAUSE OUT output is reset when dialling resumes.
All Keypad positions are disabled whilst memory dialling is
in progress.
Timed Break & Earth Loop Recall (Flash)
The MA5883 supports both TBR and ELR and offers a
common operating protocol in both cases.
After a recall (Flash) operation, the dialling mode selected
via the SELECT pin will be restored. Also, only the digits
dialled after the ELR/TBR operation will be retained in the LNR
store.
A TBR (Flash) of 100ms(1) is generated when the TBR key
is pressed. The MASK output goes low in order to produce the
line break. When in DTMF mode, the MF OUT output also
goes low for the duration of the break.
ELR is supported via the COLUMN 3 pin. If this pin is
connected to ground for a minimum of 20ms during an ELR
operation, the chip will offer the same operating protocol as for
TBR.
This may be achieved by use of the circuit shown below in
figure 3, or by use of a double contact switch.
Grounding COLUMN 3 will not directly affect the chip
outputs. However, in order to prevent misoperation, the HSW
timeout will be disabled during ELR. This is so that the MA5883
cannot go into the on-hook state if the HSW input goes low as
a result of ELR signalling (i.e. whilst the telephone is, in reality,
still 0ff-hook). The MASK and IMP outputs will respond as
normal to the status of the HSW input.
(1)Other TBR (Flash) periods are available as mask options
(see page 7).
MA5883
COL3
22 Ohms
VSS
Figure 3. Earth loop recall
4
5 Page 
MA5883
PACKAGE DETAILS
Dimensions are shown thus: mm (in). For further package information, please contact you local Customer Service Centre
1
3·25/3·86
(0·128/0·152)
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PIN 1 IDENT
6·55/6·65 8·255 (0·325)
(0·258/0·262)
MAX
31·39/31·60
(1·236/1·244)
24
0·51 2·54
(0·020) (0·100)
MIN MIN
0·36/0·58
(0·014/0·023)
24
24 LEADS AT
2·54 (0·10) NOM
SPACING
24-LEAD PLASTIC DIL
SKINNYDIP) – DP24/S
0·178/0·330
(0·007/0·013)
7·62
(0·3)
CRS
NOM
10° MAX
PIN 1 IDENT
7.39 (0.291) 10.00 (0.393)
7.59 (0.299) 10.64 (0.419)
24-LEAD MINIATURE PLASTIC DIL
(WIDE BODY) - MP24/W
1
0.74 (0.029)
MAX
0.36 (0.014)
0.49 (0.020)
2.36 (0.093)
2.64 (0.104)
0° - 8°
24 LEADS AT
1.27 (0.050)
SPACING
15.60 (0.614)
0.10 (0.004)
0.30 (0.012)
0.23 (0.009)
0.33 (0.013)
0.41 (0.016)
1.27 (0.050)
HEADQUARTERS OPERATIONS
GEC PLESSEY SEMICONDUCTORS
Cheney Manor, Swindon,
Wiltshire SN2 2QW, United Kingdom.
Tel: (0793) 518000 Tx: 449637
Fax: (0793) 518411
GEC PLESSEY SEMICONDUCTORS
Sequoia Research Park, 1500 Green Hills Road,
Scotts Valley, California 95066,
United States of America. Tel (408) 438 2900
ITT Telex: 4940840 Fax: (408) 438 5576
CUSTOMER SERVICE CENTRES
• FRANCE & BENELUX Les Ulis Cedex Tel: (1) 64 46 23 45 Tx: 602858F
Fax : (1) 64 46 06 07
• GERMANY Munich Tel: (089) 3609 06-0 Tx: 523980 Fax : (089) 3609 06-55
• ITALY Milan Tel: (02) 66040867 Fax: (02) 66040993
• JAPAN Tokyo Tel: (03) 3296-0281 Fax: (03) 3296-0228
• NORTH AMERICA Integrated Circuits and Microwave Products Scotts Valley, USA
Tel (408) 438 2900 ITT Tx: 4940840 Fax: (408) 438 7023.
Hybrid Products, Farmingdale, USA Tel (516) 293 8686
Fax: (516) 293 0061.
• SOUTH EAST ASIA Singapore Tel: (65) 3827708 Fax: (65) 3828872
• SWEDEN Stockholm, Tel: 46 8 702 97 70 Fax: 46 8 640 47 36
• UNITED KINGDOM & SCANDINAVIA
Swindon Tel: (0793) 518510 Tx: 444410 Fax : (0793) 518582
These are supported by Agents and Distributors in major countries world-wide.
© GEC Plessey Semiconductors 1993 Publication No. DS3601 Issue No. 1.3 February 1993
This publication is issued to provide information only which (unless agreed by the Company in writing) may not be used, applied or reproduced for any purpose nor form part of any order or contract nor to be regarded
as a representation relating to the products or services concerned. No warranty or guarantee express or implied is made regarding the capability, performance or suitability of any product or service. The Company
reserves the right to alter without prior knowledge the specification, design or price of any product or service. Information concerning possible methods of use is provided as a guide only and does not constitute
any guarantee that such methods of use will be satisfactory in a specific piece of equipment. It is the user's responsibility to fully determine the performance and suitability of any equipment using such information
10and to ensure that any publication or data used is up to date and has not been superseded. These products are not suitable for use in any medical products whose failure to perform may result in significant injury
or death to the user. All products and materials are sold and services provided subject to the Company's conditions of sale, which are available on request.
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet MA5883.PDF ] | |
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