MAX6324 MAXIM [Maxim Integrated Products], MAX6324 Datasheet
MAX6324
Available stocks
Related parts for MAX6324
MAX6324 Summary of contents
Page 1
... WDPO is asserted for 1ms when a fault is observed. Eight laser-trimmed timeout periods are available. The MAX6323/MAX6324 are offered in a 6-pin SOT23 package and operate over the extended temperature range (-40°C to +125°C). Automotive ...
Page 2
... Supervisory Circuits with Windowed (Min/Max) Watchdog and Manual Reset ABSOLUTE MAXIMUM RATINGS Terminal Voltage (with respect to GND) V ..................................................................-0.3V to +6.0V CC MR, RESET (MAX6323), WDI................-0. WDPO, RESET (MAX6324) ..............................-0.3V to +6.0V , WDI, MR ..............................................20mA Input Current Output Current, RESET, WDPO ..........................................20mA Rate of Rise, V ............................................................100V/µs CC Continuous Power Dissipation (T = +70° ...
Page 3
Supervisory Circuits with Windowed (Min/Max) Watchdog and Manual Reset ELECTRICAL CHARACTERISTICS (continued full range -40°C to +125°C, unless otherwise noted. Typical values are PARAMETER SYMBOL WATCHDOG INPUT AND OUTPUT Watchdog Timeout ...
Page 4
Supervisory Circuits with Windowed (Min/Max) Watchdog and Manual Reset (V = full range +25°C, unless otherwise noted SUPPLY CURRENT vs. TEMPERATURE 5. 3. ...
Page 5
... WDPO is only active when RESET is high. Active-Low. Reset is asserted when V RESET 6 for the duration of the reset timeout period. The MAX6323 has a push-pull output and the MAX6324 has an open-drain output. Connect a pullup resistor from RESET to any supply voltage up to +6V. _______________________________________________________________________________________ Typical Operating Characteristics (continued) ...
Page 6
... Upon detecting a watchdog fault, the WDPO output will pulse low for 1ms. WDPO is an open-drain output. Connect a pullup resistor on WDPO to any supply up to +6V. The MAX6323/MAX6324 also include a standard V reset monitor to ensure that the µP is started in a known state and to prevent code execution errors during power-up, power-down, or brownout conditions. ...
Page 7
Supervisory Circuits with Windowed (Min/Max) Watchdog and Manual Reset RESET WDI WDPO Figure 2. Fast Fault Timing RESET WDI WDPO Figure 3. Slow Fault Timing RESET WDI H WDPO L Figure 4. Normal Operation, WDPO Not Asserted _______________________________________________________________________________________ t ...
Page 8
... The MAX6323 has a push-pull output stage, and the MAX6324 utilizes an open-drain output. Connect a pull- up resistor on the RESET output of the MAX6324 to any supply up to +6V. Select a resistor value large enough to register a logic low (see Electrical Characteristics ) and small enough to register a logic high while supply- ing all input leakage currents and leakage paths con- nected to the RESET line. A 10kΩ ...
Page 9
... MAX6324 Open-Drain RESET Output Allows Use with Multiple Supplies Generally, the pullup resistor connected to the MAX6324 will connect to the supply voltage that is being monitored at the IC’ systems may use the open-drain output to level-shift from the monitored supply to reset circuitry powered by some other supply (Figure 8). Keep in mind that as the MAX6324’ ...
Page 10
... SET WDI HIGH RETURN END Figure 9. Watchdog Flow Diagram V CC 500pF *MAX6324 ONLY Figure 10. WDPO to MR Loopback Circuit 10 ______________________________________________________________________________________ An error detected by the watchdog often indicates that a problem has occurred in the µP code execution. This could be a stalled instruction or a loop from which the processor cannot free itself. If the µ ...
Page 11
... TEMP PART RANGE MAX6324_UT_ _-T -40°C to +125°C MAX6324_UT_ _/V-T -40°C to +125° 6324_U T_ _ -40°C to +125°C *These devices are factory trimmed to one of eight watchdog- timeout windows and one of six reset voltage thresholds. Insert the letter corresponding to the desired watchdog-timeout window ( into the blank following the number 6323 or 6324 (see Watchdog Timeout table) ...
Page 12
... CC 500pF *MAX6324 ONLY For the latest package outline information and land patterns www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status ...
Page 13
Supervisory Circuits with Windowed (Min/Max) Watchdog and Manual Reset REVISION REVISION NUMBER DATE 0 10/00 Initial release 5 5/10 Updated the Ordering Information and Absolute Maximum Ratings. 6 1/11 Corrected placement the Ordering Information section Maxim ...