SA54L59 Ver la hoja de datos (PDF) - South African Micro Electronic Systems

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SA54L59

PULSE/DTMF SWITCHABLE DIALLERS WITH 10 REPERTORY MEMORIES

South African Micro Electronic Systems 

SA545

12. LOCKING FACILITY

This feature is available on the SA54L5. Pin 11 (LOCK) should be connected to VSS

if the device is to be locked and to VDD 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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