MAX6467:Microprocessor Supervisory Reset Circuits with Edge-Triggered, One-Shot Manual Reset

The MAX6467/MAX6468 microprocessor (µP) supervisory circuits monitor single power-supply voltages from +1.8V to +5.0V and assert a reset if the supply voltage drops below its preset threshold. An edge-triggered, one-shot manual reset function ensures that the µP enters the reset mode for a fixed timeout period only, even in the event of a continuously asserted manual reset. The MAX6467/MAX6468 significantly improve system reliability compared to traditional manual reset supervisory circuits. A variety of factory-trimmed threshold options accommodate different supply voltages and tolerances, eliminating external components. The factory-set thresholds range from +1.575V to +4.625V to monitor +5.0V, +3.3V, +3.0V, +2.5V, and +1.8V supplies with various tolerances. Reset timeout periods of 150ms (min) and 1200ms (min) are available to accommodate different µP platforms. A single, active-low RESET output asserts when VCC drops below its threshold or if the edge-triggered active-low MR asserts low. Active-low RESET remains low for the reset timeout period after VCC rises above its threshold and for a fixed, one-shot timeout period after a manual reset input falling edge. Active-low RESET remains valid as long as VCC remains above +1V. Open-drain (MAX6467) and push-pull (MAX6468) output options provide additional flexibility in the system design. The MAX6467/MAX6468 are offered in the space-saving 4-pin SOT143 package and the ultra-small 4-pin SC70 package and are specified over the automotive (-40°C to +125°C) temperature range.

Key Features
  • Precision Factory-Set Reset Threshold Voltages for +5.0V, +3.3V, +3.0V, +2.5V, and +1.8V Supplies
  • Edge-Triggered Manual Reset Input with One-Shot Pulsed Reset Output
  • Two Reset Timeout Period Options (150ms or 1200ms min)
  • Immune to Short Voltage Transients
  • Low Supply Current (3µA at VCC = +1.8V)
  • Active-Low RESET Valid to VCC = +1V
  • Active-Low Open-Drain and Push-Pull Active-Low RESET Output Options
  • -40°C to +125°C Operating Temperature Range
  • Small 4-Pin SC70 and SOT143 Packages
  • No External Components Required
  • Pin Compatible with MAX811, MAX6315, MAX6384, and MAX6386
MAX6467, MAX6468: Functional Diagram
MAX6467, MAX6468: Functional Diagram
Applications/Uses
  • Automotive Products
  • Cell Phones/PDAs
  • Digital Cameras
  • DSL Modems
  • Embedded Control Systems
  • Global Positioning Systems (GPS)
  • Industrial Equipment
  • Medical Devices
  • MP3 Players
  • Portable/Battery-Powered Equipment
DataSheet
titleDownload file
MAX6467-MAX6468 Data SheetMAX6467-MAX6468.pdf
Parametrics
Part NumberMonitored VoltagesManual Reset FeatureMR1 Setup TimeReset Thresh.
(V)
Reset OuttRESETReset Thresh. Accur.
(%)
ICC
(µA)
Package/PinsBudgetary
Price
min@ +25°CmaxSee Notes
MAX64671One-Shot1µs1.2 to 1.79
1.8 to 2.49
2.5 to 3.29
3.3 to 4.99
Active Low
Open Drain
85ms to 300ms
>1s
1.513SC-70/4
SOT/4
$1.11 @1k
MAX6468Active Low
Push-Pull
SC-70/4
SOT/4

Part NumberSwitch InputsEdge TriggeredFunctionsDebounce Duration
(ms)
Output PolarityOutput TypeSwitch Inputs
(±V)
ESD Protect.
(±kV)
ICC
(µA)
Oper. Temp.
(°C)
Package/PinsBudgetary
Price
maxmaxSee Notes
MAX64671Falling EdgeNon-Retriggerable One-Shot85 to 300Active LowOpen-Drain+5.5213-40 to +85
-40 to +125
0 to +70
SC-70/4
SOT/4
$1.11 @1k
MAX6468Push-PullSC-70/4
SOT/4
Quality and Environmental Data
Related Products
  • MAX6386:SC70/µDFN, Single/Dual Low-Voltage, Low-Power µP Reset Circuits
  • MAX6384:SC70/µDFN, Single/Dual Low-Voltage, Low-Power µP Reset Circuits
  • MAX811:4-Pin µP Voltage Monitors with Manual Reset Input
  • MAX6315:Open-Drain SOT µP Reset Circuit
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX6467US16D3No Longer AvailableMAX6467US16D3+SOT,;4 pin;8 mm²-40°C to +85°CNo
MAX6467US16D3+ActiveSOT,;4 pin;8 mm²-40°C to +85°CLead Free
MAX6467US16D3+TActiveSOT,;4 pin;8 mm²-40°C to +85°CLead Free
MAX6467US16D3-TNo Longer AvailableMAX6467US16D3+TSOT,;4 pin;8 mm²-40°C to +85°CNo
MAX6467US16D7+TActiveSOT,;4 pin;8 mm²-40°C to +85°CLead Free
MAX6467US16D7-TNo Longer AvailableSOT,;4 pin;8 mm²-40°C to +85°CNo
MAX6467US17D3+TActiveSOT;-40°C to +85°CSee data sheet
MAX6467US17D3-TActiveSOT,;4 pin;8 mm²-40°C to +85°CNo
MAX6467US17D7+TActiveSOT;-40°C to +85°CSee data sheet
MAX6467US17D7-TActiveSOT,;4 pin;8 mm²-40°C to +85°CNo
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX6467US18D3+TActiveSOT;-40°C to +85°CSee data sheet
MAX6467US18D3-TNo Longer AvailableSOT,;4 pin;8 mm²-40°C to +85°CNo
MAX6467US18D7+TActiveSOT;-40°C to +85°CSee data sheet
MAX6467US18D7-TActiveSOT,;4 pin;8 mm²-40°C to +85°CNo
MAX6467US19D3+TActiveSOT;-40°C to +85°CSee data sheet
MAX6467US19D3-TActiveSOT,;4 pin;8 mm²-40°C to +85°CNo
MAX6467US19D7+TActiveSOT;-40°C to +85°CSee data sheet
MAX6467US19D7-TActiveSOT,;4 pin;8 mm²-40°C to +85°CNo
MAX6467US20D3+TActiveSOT;-40°C to +85°CSee data sheet
MAX6467US20D3-TActiveSOT,;4 pin;8 mm²-40°C to +85°CNo
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX6467US20D7+TActiveSOT;-40°C to +85°CSee data sheet
MAX6467US20D7-TActiveSOT,;4 pin;8 mm²-40°C to +85°CNo
MAX6467US21D3+TActiveSOT;-40°C to +85°CSee data sheet
MAX6467US21D3-TActiveSOT,;4 pin;8 mm²-40°C to +85°CNo
MAX6467US21D7+TActiveSOT;-40°C to +85°CSee data sheet
MAX6467US21D7-TActiveSOT,;4 pin;8 mm²-40°C to +85°CNo
MAX6467US22D3+ActiveSOT,;4 pin;8 mm²-40°C to +85°CLead Free
MAX6467US22D3+TActiveSOT,;4 pin;8 mm²-40°C to +85°CLead Free
MAX6467US22D3-TNo Longer AvailableMAX6467US22D3+TSOT,;4 pin;8 mm²-40°C to +85°CNo
MAX6467US22D7+TActiveSOT;-40°C to +85°CSee data sheet
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX6467US22D7-TActiveSOT,;4 pin;8 mm²-40°C to +85°CNo
MAX6467US23D3+TActiveSOT;-40°C to +85°CSee data sheet
MAX6467US23D3-TActiveSOT,;4 pin;8 mm²-40°C to +85°CNo
MAX6467US23D7+TActiveSOT;-40°C to +85°CSee data sheet
MAX6467US23D7-TActiveSOT,;4 pin;8 mm²-40°C to +85°CNo
MAX6467US24D3+TActiveSOT;-40°C to +85°CSee data sheet
MAX6467US24D3-TActiveSOT,;4 pin;8 mm²-40°C to +85°CNo
MAX6467US24D7+TActiveSOT;-40°C to +85°CSee data sheet
MAX6467US24D7-TActiveSOT,;4 pin;8 mm²-40°C to +85°CNo
MAX6467US25D3+TActiveSOT;-40°C to +85°CSee data sheet
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX6467US25D3-TNo Longer AvailableMAX6467US25D3+TSOT,;4 pin;8 mm²-40°C to +85°CNo
MAX6467US25D7+TActiveSOT;-40°C to +85°CSee data sheet
MAX6467US25D7-TActiveSOT,;4 pin;8 mm²-40°C to +85°CNo
MAX6467US26D3+ActiveSOT,;4 pin;8 mm²-40°C to +85°CLead Free
MAX6467US26D3+TActiveSOT,;4 pin;8 mm²-40°C to +85°CLead Free
MAX6467US26D3-TNo Longer AvailableMAX6467US26D3+TSOT,;4 pin;8 mm²-40°C to +85°CNo
MAX6467US26D7+TActiveSOT;-40°C to +85°CSee data sheet
MAX6467US26D7-TActiveSOT,;4 pin;8 mm²-40°C to +85°CNo
MAX6467US27D3+TActiveSOT;-40°C to +85°CSee data sheet
MAX6467US27D3-TNo Longer AvailableSOT,;4 pin;8 mm²-40°C to +85°CNo
MAX6467-MAX6468.pdf MAX6468
MAX6467.pdf MAX6467