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PDF SA589 Data sheet ( Hoja de datos )
| Número de pieza | SA589 | |
| Descripción | LD/DTMF SWITCHABLE DIALLERS WITH DEDICATED KEYS FOR 20 MEMORIES | |
| Fabricantes | Sames | |
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SA589
LD/DTMF SWITCHABLE DIALLERS
WITH DEDICATED KEYS FOR 20 MEMORIES
FEATURES
n Selectable Loop-Disconnect or DTMF
Modes
n Keypad Switchable LD to DTMF
n 20 x 24-Digit Memories, (each with
Dedicated Key)
n 24 Digit Last Number Redial
n Selectable Make/Break Ratios 2:1 and 3:2
n Uses Inexpensive 560kHz Ceramic
Resonator
n Batteryless operation - Low Power CMOS
n Mask Programmable Options to suit
application
n Timed Break Recall (Flash) and Earth
Recall
DESCRIPTION
The SA589 family are keypad switchable LD/
DTMF dialler devices with a last number
redial facility and twenty 24-digit memories
each with its own dedicated dialling key.
Three operating modes are available: LD
only mode, DTMF only mode and LD mode
with the ability to switch temporarily to DTMF
mode from the keypad during a call. This last
mode enables subscribers to access such
services as home banking. Mixed LD and
DTMF numbers can also be stored in memory.
The SA589 devices are pin compatible with
the SAMES switchable dialler families SA541,
SA545, SA585, SA587 and SA588 - providing
a complete range of telephone features within
a single PCB and circuit design. Metal mask
and pin selectable options are available to
service specific requirements of particular
countries and customers.
FIG. 1 PIN CONNECTIONS
NC 1
COL6
IMP
2
3
SELECT
4
MASK
5
OSC OUT
6
OSC IN
7
FILT IN
8
FILT OUT
9
HSW
10
V
SS
V
DD
PAUSE OUT
11
12
13
ROW5
14
SA589
28 ROW7
27 COL5
26 COL4
25 ROW4
24 ROW3
23 ROW2
22 ROW1
21 COL3
20 COL2
19 COL1
18 MUTE
17 MFOUT
16 COL7
15 ROW6
DR-00684
Package:
DIP28
4120
PDS039-SA589-001
REV. C
1/14
09-03-1995
1 page  
TABLE 2: Dialling mode selection
Select Pin to
VSS
COL1
Dialling Mode
LD + DTMF
LD + DTMF
COL2
LD + DTMF
COL3
LD + DTMF
COL4
LD only
COL5
DTMF only
COL6
DTMF only
COL7
LD only
VDD DTMF only
B:M Ratio
2:1
2:1
3:2
3:2
2:1
-
-
3:2
-
SA589 FAMILY
TBR (msec)
100
270
270
100
-
270
270
-
100
However, if one of the 'LD + DTMF' modes is selected the chip will be in LD mode initially in
the off-hook condition but may be switched to DTMF by pressing either *, */# or TONE key
(depending on the mask variant - see Fig. 2 and page 11), provided that dialling is not in
progress. If any of these keys are pressed during LD dialling, they will be ignored.
Only if * or # are pressed subsequent to switching to DTMF, will * or # be dialled. Only digits
entered prior to a switch to DTMF will subsequently be available for redialling (see Last
Number Redial operation), unless specified otherwise.
Once switched to DTMF, dialling will remain in this mode until either a Recall (Flash) operation
or until the chip returns to the on-hook state.
Last Number Redial (LNR)
The function of the on-chip LNR store is to retain automatically a manually dialled number for
redialling later. The capacity of the memory is 24 digits. If a number is dialled which is longer
than this, dialling will continue, but redialling will not be allowed with this number. To redial
a number in the LNR store, the LNR key may be pressed once, or the Redial key can be
pressed twice.
The last number redial store has several features designed to assist the user:
Moving cursor facility
This facility is provided to aid use in PABX applications, where the user must first dial an
access digit, or digits, and then wait for a second dial tone before continuing dialling.
This allows a user to enter the first digit or digits of the number in the last number redial store
manually before pressing the LNR key; the remainder of the number will be dialled when
the LNR key is pressed.
If the digit(s) dialled manually do not match those in the LNR memory, then redialling will
be inhibited for the remainder of the call, and the numbers entered will be saved in the LNR
memory for redialling in a subsequent call.
If the user manually dials the first digit(s) in the LNR memory, and then goes on-hook, the
whole contents of the memory will be retained.
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5/14
5 Page 
SA589 FAMILY
IMP
t1 =
t2 =
t3 =
t4 =
t5 =
DR-00689
t1
t2
t3
t4
PRE-DIGIT PAUSE (=t )5
BREAK PERIOD (60ms or 67ms)
MAKE PERIOD (40ms or 33ms)
POST-DIGIT MAKE (=t )
3
INTER-DIGIT PAUSE (800ms)
t5
t3
Fig.7 Timing data
MASK OPTIONS
The SA589 has been designed so that many features can be altered quickly and inexpensively
at the final stage of manufacture. These options allow the telephone manufacturer to cater
for different market requirements throughout the world without changing the telephone circuit.
The options, listed below, are possible in any combination. Standard options are listed first
in bold italics at 'a'. Other options may be produced by arrangement. Please consult your
nearest SAMES Representative for advice on availability.
A. 'Long' TBR (Flash) Period
a. 270ms
b. 600ms
B. LD to DTMF Keypad Switching
a. * and # keys
b. TONE key
c. * key
C. Retention of Post-*/#Digits in LNR Store (DTMF Mode)
a. All digits retained
b. Digits before * or # retained
D. Short/Long TBR Selection
a. As specified
b. Short and Long TBR reversed
E. Recall (Flash)/LNR protocol
a. Digits dialled after Recall retained
b. Digits dialled before Recall retained
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11/14
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| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet SA589.PDF ] | |
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