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參數(shù)資料
| 型號(hào)： | M3541 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | Single Number Pulse Tone Switchable Dialer(脈沖語(yǔ)音開(kāi)關(guān)撥號(hào)器) |
| 中文描述： | 單數(shù)脈沖切換撥號(hào)音（脈沖語(yǔ)音開(kāi)關(guān)撥號(hào)器） |
| 文件頁(yè)數(shù)： | 1/12頁(yè) |
| 文件大?。?/td> | 165K |
| 代理商： | M3541 |
M3541
July 1993
SINGLE NUMBER PULSE TONE SWITCHABLE DIALER
.
SELECTABLELOOPDISCONNECT ORDTMF
DIALLINGMODES
.
ALLOWS USER TO SWITCH FROM LD TO
DTMF DIALLINGDURING A CALL
.
LNR FACILITY ALLOWSUP TO 31 DIGITS TO
BERETAINED FOR REDIALLING
.
SELECTABLEMAKE/BREAKRATIOS 2:1 AND
USESINEXPENSIVE560KHz RESONATOR
.
TIMED BREAKRECALL (timed flash)
.
OPERATES WITH INEXPENSIVE SINGLE
CONTACT KEYPAD
.
CAPABLE OF BATTERY-LESS OPERATION.
LOW POWER CMOS PROCESS ALLOWS DI-
RECT
OPERATION
FROM
TELEPHONE
LINES
PRELIMINARY DATA
3:2
.
SELECTABLEINTERDIGIT PAUSE 500ms OR
800ms
DIP20
SO20
ORDERING NUMBERS:
M3541B/1
M3541D
DESCRIPTION
The M3541is a keypad switchableLD/DTMF dialer
devices designed for use in low cost, dual dialing
modetelephoneinstruments.Itis suitablefor send-
ing telephonenumberswithout limit and an on-chip
memory allows numbers of up 31 digits to be re-
tainedforrediallinglater. The lowpower CMOS de-
sign allows the number in the memory to be main-
tained 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 from LD to DTMF via the key-
padduring the courseof acall. This is intendedfor
uses such as home banking, access to long dis-
tancetrunkservice,creditcardverificatiosandother
applications which require data to be sent at low
speed oncea connectionhas beenestablished.
PIN CONNECTION
(Top view)
1/12
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