Quad Voltage µP Supervisory Circuit in SOT Package
Industry's Smallest Quad Voltage Reset IC
DescriptionThe MAX6339 is a precision quad voltage monitor with microprocessor (µP) supervisory reset timing. The device can monitor up to four system supply voltages without any external components and asserts a single reset if any supply voltage drops below its preset threshold. The device significantly reduces system size and component count while improving reliability compared to separate ICs or discrete components.
A variety of factory-trimmed threshold voltages are available to accommodate different supply voltages and tolerances with minimal external component requirements. The selection includes internally fixed options for monitoring +5.0V, +3.3V, +3.0V, +2.5V, +1.8V, and -5.0V supplies with -5% and/or -10% tolerances. The device is also available with one or two user-adjustable threshold options if non-standard thresholds are desired (use external resistor-divider network).
The quad monitor provides a single active-low reset output that is asserted when any monitored input is below its associated threshold. The output is open drain with a weak internal pullup (10µA) to IN2. Reset remains low for a reset timeout period (140ms min) after all voltages are above the selected thresholds. The output is valid as long as either the IN1 or IN2 input voltage remains > 1V.
The MAX6339 is available in a small 6-pin SOT23 package and operates over the extended (-40°C to +85°C) temperature range.
- Monitors Four Power-Supply Voltages
- Precision Factory-Set Reset Threshold Options for +5.0V, +3.3V, +3.0, +2.5V, +1.8V, and -5.0V Supplies
- User-Adjustable Voltage Monitoring Threshold Options
- Low 55µA Supply Current
- Open-Drain active-low RESET Output with 10µA Internal Pullup
- 140ms (min) Reset Timeout Period
- Active-low RESET Valid to IN1 = 1V or IN2 = 1V
- Immune to Short Monitored Supply Transients
- No External Components Required
- Guaranteed from -40°C to +85°C
- Small 6-Pin SOT23 Package
- Computers: Desktop, Workstation, Server
- Data Storage Equipment
- High-End Printers
- Industrial Equipment
- Network Equipment
- Set-Top Boxes
|Part Number||Interface||Reset Thresh.|
|Reset Out||tRESET||Watchdog Feature||Supervisor Features||ICC|
|85ms to 300ms||No Watchdog|
|Device||Fab Process||Technology||Sample size||Rejects||FIT at 25°C||FIT at 55°C||Material Composition|