sames
SA545
1/18
sames
SA545, SA54L5
PULSE/DTMF SWITCHABLE DIALLERS WITH 10 REPERTORY
MEMORIES
FEATURES
■ Selectable Loop-disconnect (Pulse) or
DTMF (Tone) dialling modes
■ 10 x 24 Digit Repertory Dialling Stores
■ 24 Digit Last Number Redial (LNR)
■ Selectable Interdigit Pause (IDP)
500ms or 800ms
■ Operates with inexpensive single
contact keypad
■ On-chip Darlington transistor pair for
DTMF tone filtering
■ Low power CMOS technology enables
direct operation from Telephone line
■ Keypad switchable Loop-Disconnect to
DTMF during a call
PIN CONNECTIONS:
SA545
PIN CONNECTIONS:
SA54L5
M63-1961 PDS039-SA545-001 REV. B 31-08-94
■ Selectable Break:Make Ratios 2:1 or
3:2
■ Uses inexpensive 560KHz ceramic
resonator
■ Earth Loop Recall and Timed Break
Recall (Timed Flash)
■ Low on-hook Supply Current Options
SA54X53 - 5µA @ 2.5V
SA54X56 - 1µA @ 2.5V
SA54X59 - 1µA @ 3.0V
■ Call, barring/locking feature available
on the SA54L5
■ Optional use of external capacitor for
oscillator
