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FM809JH Datasheet

  • FM809JH

  • Voltage Detector

  • 5頁

  • ETC

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FM809 Precision Reset Generator Circuit
August 2000
FM809
Precision Reset Generator Circuit
General Description
The FM809 features comprehensive reset generation for
microcontroller/microprocessor based systems. If the system V
CC
voltage level is determined to be in an out-of-tolerance state, the
device automatically generates a low-going reset signal. The
reset signal is held in the active state (low) for a specified duration
(minimum 140 ms) after the V
CC
returns to an in-tolerance state.
The FM809 is fabricated using CMOS technology. The FM809 is
available in the SOT-23 package.
Features
I
Automatic reset generation on power-up
I
Minimum 140 ms reset pulse 鈥?compatible with other similar
809 class devices
I
Other reset pulse choices available: 32 - 256 ms
I
Choice of commercial and extended temperature ranges
I
Choice of Reset Thresholds: 4.63V, 4.38V, 4.00V, 3.08V,
2.93V, 2.63V
I
Package available: SOT-23
Block Diagram
V
CC
V
CC
Tolerance Detect
& Reset Monitor
Output
Stage
Reset_out
(active low)
Temp. Compensated
Reference
Connection Diagram
1
1 = GND
2 = RESET'
3 = V
CC
2
FM809
3
漏 2000 Fairchild Semiconductor International
FM809 Rev. A.1
1
www.fairchildsemi.com

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