LM809/LM810 3-Pin Microprocessor Reset Circuits
LM809/LM810 3-Pin Microprocessor Reset Circuits
LM809/LM810 3-Pin Microprocessor Reset Circuits
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<strong>LM809</strong>/<strong>LM810</strong>Ordering Information<strong>Reset</strong> Threshold(V)<strong>LM809</strong> Supplied as 1000units, tape & reel<strong>LM809</strong> Supplied as 3000units, tape & reelPackageTop Mark4.63 <strong>LM809</strong>M3-4.63 <strong>LM809</strong>M3X-4.63 S8B4.38 <strong>LM809</strong>M3-4.38 <strong>LM809</strong>M3X-4.38 S7B4.00 <strong>LM809</strong>M3-4.00 <strong>LM809</strong>M3X-4.00 S6B3.08 <strong>LM809</strong>M3-3.08 <strong>LM809</strong>M3X-3.08 S5B2.93 <strong>LM809</strong>M3-2.93 <strong>LM809</strong>M3X-2.93 S4B2.63 <strong>LM809</strong>M3-2.63 <strong>LM809</strong>M3X-2.63 S3B2.45 <strong>LM809</strong>M3-2.45 <strong>LM809</strong>M3X-2.45 SFBPackageTypeSOT23-3NSC PackageM03B<strong>Reset</strong> Threshold(V)<strong>LM810</strong> Supplied as 1000units, tape & reel<strong>LM810</strong> Supplied as 3000units, tape & reelPackageTop Mark4.63 <strong>LM810</strong>M3-4.63 <strong>LM810</strong>M3X-4.63 SEBPackageTypeNSC Package4.38 <strong>LM810</strong>M3-4.38 <strong>LM810</strong>M3X-4.38 SDB4.00 <strong>LM810</strong>M3-4.00 <strong>LM810</strong>M3X-4.00 SCB3.08 <strong>LM810</strong>M3-3.08 <strong>LM810</strong>M3X-3.08 SBBSOT23-3 M03B2.93 <strong>LM810</strong>M3-2.93 <strong>LM810</strong>M3X-2.93 SAB2.63 <strong>LM810</strong>M3-2.63 <strong>LM810</strong>M3X-2.63 S9BCustom voltages and improved accuracies are available, subject to minimum orders. Contact your local National Semiconductor Sales Office for information.<strong>Pin</strong> DescriptionPIN NAME FUNCTION1 GND Ground reference2RESET (<strong>LM809</strong>)Active-low output. RESET remains low while V CC is below the reset threshold, andfor 240ms after V CC rises above the reset threshold.RESET (<strong>LM810</strong>)Active-high output. RESET remains high while V CC is below the reset threshold, andfor 240ms after V CC rises above the reset threshold.3 V CC Supply Voltage (+5V, +3.3V, or +3.0V)www.national.com 2
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