SA545 Datasheet, PDF (15/18 Pages) Sames – PULSE/DTMF SWITCHABLE DIALLERS WITH 10 REPERTORY MEMORIES

SA545
12. LOCKING FACILITY
This feature is available on the SA54L5. Pin 11 (LOCK) should be connected to V_SS
if the device is to be locked and to V_DD if the device is to be unlocked. This feature
can be controlled by an inexpensive low voltage SPDT switch. When locked it is
impossible to dial out any number other than those stored in the LNR and repertory
memory. If the redial key is pressed twice while in the locked state the number in the
LNR store will be dialled out. To dial from the repertory memory while in the locked
state the redial key is pressed once followed by the number (0-9) of the store to be
dialled.
13. OPTIONS
The SA545 has been designed to allow the telephonic manufacturer to cater for
different market requirements. The device can be programmed, on request, at the
final manufacturing stage so as to enable various attractive options. These options
are listed below and are available in any combination. The standard options are
listed first in Italics.
A. Packaging
SA545
a) 20 pin DIP
b) 18 pin DIP (filter not bonded out)
c) Other packages available on request (e.g. SO,LCC)
SA54L5
a) 22 pin DIP
b) 20 pin DIP (filter not bonded out)
c) Other packages on request
B. TBR (Flash) Period
SA545 and SA54L5
a) 100ms
d) 600ms
b) 200ms
c) 300ms
C. TBR (Flash) LNR Protocol
a) Number after the TBR is retained in LNR store.
b) Number before the TBR is retained in the LNR store.
D. PIN 3
a) MASK
b) MASK
E. PIN 1
a) IMP
b) IMP
c) IMP + MASK
d) IMP + MASK
sames
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