SA541

sames FEATURES s SA541, SA54L1 PULSE/DTMF SWITCHABLE DIALLERS Selectable Loop-Disconnect (Pulse) or DTMF (Tone) dialling modes 32 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 Optional use of external capacitor for oscillator s s Keypad switchable Loop-Disconnect to DTMF during a call 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 SA5413 - 5µA @ 2.5V SA5416 - 1µA @ 2.5V SA5419 - 1µA @ 3.0V Call, barring/locking feature available on the SA54L1 s s s s s s s s s s PIN CONNECTIONS: SA541 PIN CONNECTIONS: SA54L1 1/16 M57-1529 PDS039-SA541-001 REV. B 02-09-94 SA541 ABSOLUTE MAXIMUM RATINGS * Parameter Min Typ Max 6,5 V DD +0,3 1 0,1 0 70 125 Unit V V V mA mA mA °C °C Notes Supply Voltage VDD - VSS -0,3 Voltage on any pin (except HSW) VSS -0,3 Voltage on pin HSW VSS -0,3 Current at any pin -1 (except HSW, FILTOUT and FILTIN) Current at pin FILTOUT 0 Current at pin FILTIN -5 Operating Temperature -25 Storage Temperature -55 See Note 1 * Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This a stress rating only. Functional operation of the device at these or any other condition abov...