a negative-going pulse applied to VCC, starting above theactual reset threshold and ending below it by the magni-tude indicated (reset comparator overdrive). The graphindicates the typical maximum pulse width a negative-going VCCtransient may have without causing a resetpulse to be issued. As the magnitude of the transientincreases (goes farther below the reset threshold), themaximum allowable pulse width decreases. A 0.1µFcapacitor mounted as close as possible to VCCprovidesadditional transient immunity.
The MAX6381–MAX6390 are guaranteed to operateproperly down to VCC= 1V. In applications that requirevalid reset levels down to VCC= 0, a pulldown resistor toactive-low outputs (push/pull only, Figure 2) and apullup resistor to active-high outputs (push/pull only) willensure that the reset line is valid while the reset outputcan no longer sink or source current. This scheme does
Ensuring a Valid RESETOutput Down to VCC= 0
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SC70, Single/Dual Low-Voltage, Low-Power µP Reset CircuitsMAX6381–MAX6390
Pin Configurations (continued)
*MRis for MAX6384/MAX6385/MAX6386/MAX6390**RESET IN is for MAX6387/MAX6388/MAX6389( ) are for MAX6382/MAX6385/MAX6388
Chip Information
TRANSISTOR COUNT: 647PROCESS: BiCMOS
8
SC70, Single/Dual Low-Voltage, Low-Power µP Reset Circuits
Ordering Information
Note:Insert reset threshold suffix (see Reset Threshold table)after "XR" or "XS". Insert reset timeout delay (see Reset TimeoutDelay table) after "D" to complete the part number. Samplestock is generally held on standard versions only (see
Standard Versions table). Standard versions have an orderincrement requirement of 2500 pieces. Nonstandard versionshave an order increment requirement of 10,000 pieces.Contact factory for availability of nonstandard versions.*MAX6390 is available with D4 or D7 timing only.
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MAX6381–MAX6390
SC70, Single/Dual Low-Voltage, Low-Power µP Reset CircuitsMAX6381–MAX6390
Package Information
10______________________________________________________________________________________
SC70, Single/Dual Low-Voltage, Low-Power µP Reset Circuits
Package Information (continued)
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses areimplied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600____________________11©2001 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
MAX6381–MAX6390