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fp6805
production
microprocessor reset circuits with adjustable delay time
introduction
introduction
the fp6805 asserts a reset signal whenever the vdd supply voltage declines below the preset threshold and monitors the system voltages from 0.4v to 5v. a time delayed reset can be accomplished with an additional external capacitor. the fp6805 quiescent current is very low and suitable for portable and battery-operated applications.
the output rst (rst) signal is set to be active low(high). rst(rst) remains low(high) for the delay time after reset condition is deasserted and then goes high(low). the fp6805 provides ± 1% threshold accuracy.
fp6805 is available in space-saving tsot-23-3, tsot-23-5, tsot-23-6 and tdfn-6 (2mmx2mm) packages.
feature
- power-on reset generator with adjustable delay time: 2ms to 10s (fp6805s9, fp6805d7)
cd pin open: rst(rst) delay 240ms typical
cd pin connected to vdd through a resistor between 100k&omega: rst (rst) delay 0ms typical
capacitor adjustable delay time - ery low quiescent current:
1.5µa typical (fp6805s9, fp6805d7)
2.5µa typical (fp6805s7, fp6805s8) - high threshold accuracy: ± 1% typical
- fixed threshold voltages for standard voltage rails from 0.8v to 5v (fp6805s9, fp6805d7), 1.5v to 5v (fp6805s7, fp6805s8) and adjustable voltage down to 0.4v are available (fp6805s9, fp6805d7)
- manual reset (¯("mr" )) input
- open-drain ¯("rst" )(rst) output
- immune to short negative sense voltage
- guarantee reset valid to vdd=0.8v
- available in tsot-23-3, tsot-23-5, tsot-23-6 and tdfn-6 (2mmx2mm) packages
package & pins
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purchase
| part name | package | request | |
|---|---|---|---|
| fp6805-xxa/bs7 | tsot-23-3 |
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| fp6805-xxa/bs8 | tsot-23-5 |
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| fp6805-xxa/bs9 | tsot-23-6 |
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| fp6805a/bd7 | tdfn-6 (2mmx2mm) |
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