M3541 |
RFQ for M3541 Required Field |
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| Product | Manufacturers | Pack | D/C |
| M3541 | - | - | - |
The M3541 is a keypad switchable LD/DTMF dialer devices designed for use in low cost, dual dialing mode telephoneinstruments. It is suitable for sending telephone numberswithout limit and an on-chip memory allows numbers of up 31 digits to be retained for redialling later. The low power CMOS design allows the number in the memory to be maintained indefinitely (until overwritten) by a minimal current leaked from the telephoneline. A particular feature of this device is the facility for the user to switch dialling mode fromLD to DTMF via the keypad during the course of a call. This is intended for uses such as home banking, access to long distancetrunk service, credit cardverificatios andother applications which require data to be sent at low speed once a connection has been established.
Features |
| . SELECTABLELOOP DISCONNECT ORDTMF DIALLINGMODES·ALLOWS USER TO SWITCH FROM LD TO DTMF DIALLINGDURING A CALL · LNR FACILITY ALLOWS UP TO 31 DIGITS TO BE RETAINED FOR REDIALLING · SELECTABLEMAKE/BREAKRATIOS 2:1 AND 3:2 · SELECTABLE INTERDIGIT PAUSE 500ms OR 800ms . USES INEXPENSIVE560KHz RESONATOR . TIMED BREAK RECALL (timed flash) OPERATES WITH INEXPENSIVE SINGLE. CONTACT KEYPAD CAPABLE OF BATTERY-LESS OPERATION. LOWPOWER CMOS PROCESS ALLOWS DIRECT OPERATION FROM TELEPHONE LINES |
| Symbol | Parameter |
Min. |
Typ. |
Max. |
Unit |
| Supply Voltage VDD - VSS |
-0.3 |
6.5 |
V | ||
| Voltage on any Pin Except HSW Voltage on any Pin HSW (current limited to<100A) |
VSS 0.3 VSS 0.3 |
VDD + 0.3 |
V V | ||
| Current at any Pin Except FILTOUT and FILTIN Current at Pin FILTIN Current at Pin FILTOUT |
1 0 5 |
+ 1 0.1 0 |
mA mA mA | ||
| Operating Temperature Storage Temperature |
10 55 |
+ 55 + 125 |
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