參數(shù)資料
型號: FM811TUX
廠商: FAIRCHILD SEMICONDUCTOR CORP
元件分類: 電源管理
英文描述: Microprocessor Reset Circuits
中文描述: 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO4
封裝: SOT-143, 4 PIN
文件頁數(shù): 2/6頁
文件大小: 42K
代理商: FM811TUX
FM811/812
2
REV. 1.5.1 7/15/02
P
Pin Assignments
Pin Definitions
Internal Block Diagram
Pin Name
GND
RESET
Pin Number
FM811
1
2
Description
FM812
1
N/A
Ground Pin
RESET goes low if V
asserted for one reset time-out period (140ms min.) after V
reset threshold.
RESET goes high if V
CC
falls below the reset threshold and remains
asserted for one reset time-out period (140ms min.) after V
reset threshold.
Manual reset input. Shorting this pin to GND forces a reset. The reset will
remain asserted as long as MR is held low and for one reset time-out
period (140ms min.) after MR goes high. This input cannot be driven by a
CMOS or TTL logic. Push-button switch is recommended to be used with
this pin. Float if unused.
Power supply input, 3V, 3.3V, or 5V
CC
falls below the reset threshold and remains
CC
exceeds the
RESET
N/A
2
CC
exceeds the
MR
3
3
V
CC
4
4
FM811
V
CC
Top View
RESET
MR
2
4
3
FM812
V
CC
RESET
MR
GND
2
1
GND
1
4
3
4
3
Reset
Generator
2
1
+
Reset
Threshold (V)
V
CC
MR
RESET (FM811)
RESET (FM812)
GND
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