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參數資料
| 型號： | FM803TS3X |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 電源管理 |
| 英文描述： | 3-Pin レC Supervisor Device |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO3 |
| 封裝： | SOT-23, 3 PIN |
| 文件頁數： | 4/7頁 |
| 文件大小： | 345K |
| 代理商： | FM803TS3X |
4
www.fairchildsemi.com
F
μ
C
FM803 Rev. C.3
Pin Descriptions
Pin Number
Name
Function
1
GND
GROUND
2
/RESET
/RESET remains LOW while V
is below
V
TH
, and for at least 140ms after V
CC
rises
above V
TH
.
3
V
CC
Circuit Timing (Ex: FM803)
When operating properly with 5V V
(for example), /RESET will
also be about 5V. When V
CC
starts to fall, /RESET will follow it
down as shown. When V
CC
drops below V
TH
, /RESET drops to
ground (“issues a RESET”) and stays there unless V
also falls
below its minimum operating voltage, approx. 1V. At this point, the
supervisor loses control, and its output may rise, only to again
follow V
CC
down to the ground.
When V
begins to rise, /RESET follows it until 1.0V or so is
reached, whereupon the device regains control, /RESET is pulled
to ground, etc. When V
CC
rises above V
TH
, /RESET comes out of
RESET 140 ms later.
If it is required that a lower value than GND + 1.0V is needed on
RESET signal during V
≤
1V, a 100K resistor may be used on
the device output to GND.
3.3V
V
TH
1V
GND
3.3V
V
TH
1V
GND
V
CC
RESET
140ms
(min)
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