sames
4120 PDS039-SA589-001 REV. C 09-03-1995
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
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.
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
FIG. 1 PIN CONNECTIONS
SA589
Package: DIP28
1/14
MASK
DR-00684
ROW5
14
V
V
SS
DD
HSW
PAUSE OUT
13
12
10
11
6
7
8
9
OSC OUT
OSC IN
FILT IN
FILT OUT
15
19
18
17
16
23
22
20
21
SA589
1
NC
2
3
4
5
SELECT
COL6
IMP
28
27
26
25
24
