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參數(shù)資料
| 型號： | V6309 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 元件分類： | 復(fù)位半導(dǎo)體 |
| 英文描述： | 3-Pin Microprocessor Reset Circuit |
| 中文描述： | 3引腳微處理器復(fù)位電路 |
| 文件頁數(shù)： | 5/6頁 |
| 文件大?。?/td> | 246K |
| 代理商： | V6309 |
5
V6309/V6319
RESET Valid for V
DD
= Ground Cir cuit
Fig. 10
In er ac ng to μPs with Bidi ec ional Reset I/O
Fig. 11
In er acing to μPs with Bidirectional Re set Pins
Mi cro pro ces sors with bidirectional re set pins (such as the
Motorola 68HC11 se ies) can con nect to the V6309 re set
out put. If, for ex am ple, the V6309 RESET out put is as
serted high and the μP wants to pull it low, in de er mi nate
logic lev els may re sult. To cor ect this, con nect a 4.7 k
re
sis or be ween the V6309 RESET out put and the μP re set
I/O (Fig. 11). Buffer the V6309 RESET out put to other sys
tem com po nents.
Ben e its of Highly Ac cu ate Re set Thresh old
Most μP su per vi sor ICs have re set thresh old volt ages be
tween 5% and 10% be ow the value of nom nal sup ply
volt ages. This en sures a re set will not oc cur within 5% of
the nom nal sup ply, but will oc cur when the sup ply is 10%
be ow nom nal. When us ng ICs rated at only the nom nal
sup ply ±5%, this leaves a zone of un cer ainty where the
sup ply is be ween 5% and 10% low, and where the re set
may or may not be as serted.
The V6309L/T and V6319L/T use highly ac cu ate cir cuitry
to en sure that re set is as serted close to the 5% limit, and
long be ore the sup ply has de clined to 10% be ow nom
nal.
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