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PDF SA54L5 Data sheet ( Hoja de datos )
| Número de pieza | SA54L5 | |
| Descripción | PULSE/DTMF SWITCHABLE DIALLERS WITH 10 REPERTORY MEMORIES | |
| Fabricantes | Sames | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de SA54L5 (archivo pdf) en la parte inferior de esta página. Total 18 Páginas | ||
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SA545
SA545, SA54L5
PULSE/DTMF SWITCHABLE DIALLERS WITH 10 REPERTORY
MEMORIES
FEATURES
s Selectable Loop-disconnect (Pulse) or s Selectable Break:Make Ratios 2:1 or
DTMF (Tone) dialling modes
3:2
s 10 x 24 Digit Repertory Dialling Stores s Uses inexpensive 560KHz ceramic
s 24 Digit Last Number Redial (LNR)
resonator
s Selectable Interdigit Pause (IDP) s Earth Loop Recall and Timed Break
500ms or 800ms
Recall (Timed Flash)
s Operates with inexpensive single s Low on-hook Supply Current Options
contact keypad
SA54X53 - 5µA @ 2.5V
SA54X56 - 1µA @ 2.5V
s On-chip Darlington transistor pair for
SA54X59 - 1µA @ 3.0V
DTMF tone filtering
s Call, barring/locking feature available
s Low power CMOS technology enables
on the SA54L5
direct operation from Telephone line
s Optional use of external capacitor for
s Keypad switchable Loop-Disconnect to
oscillator
DTMF during a call
PIN CONNECTIONS:
SA545
PIN CONNECTIONS:
SA54L5
M63-1961
sames
PDS039-SA545-001
REV. B
1/18
31-08-94
1 page  
SA545
Block Diagram
Figure 1 depicts the SA545 block diagram, while Table 1 lists the respective pin functions
of the SA545 and SA54L5.
Figure 1: SA54X5 Block Diagram
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5 Page 
SA545
7. Earth Loop Recall (ELR) / Timed Break Recall (TBR) (Timed Flash)
The SA545 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. Only the digits dialled after the ELR/TBR operation will be retained in
the LNR store.
A TBR of 100ms1) 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 C3 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.
The ELR function may be achieved by use of the circuit shown in Figure 2, or by use
of a double contact switch.
1) Other periods avaiable on request.
Figure 2: Earth Loop Recall Application
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11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet SA54L5.PDF ] | |
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| Número de pieza | Descripción | Fabricantes |
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