MAX6886 MAXIM [Maxim Integrated Products], MAX6886 Datasheet
MAX6886
Available stocks
Related parts for MAX6886
MAX6886 Summary of contents
Page 1
... Connect external capacitors or use the factory default setting to set the watchdog timeout periods and reset time delay. The MAX6886 is available in a 20-pin thin QFN (5mm x 5mm x 0.8mm) package and operates over the extend- ed -40°C to +85°C temperature range. ...
Page 2
Pin-Selectable, Hex Power-Supply Supervisory Circuit ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND.) , RESET, SRT, SWT .............................-0.3V to +6V IN1–IN6 TH0–TH4, WDI, MR, MARGIN ..................................-0.3V to +6V DBP ..........................................................................-0.3V to +3V Input/Output Current (all pins)..........................................±20mA Continuous Power ...
Page 3
Pin-Selectable, Hex Power-Supply ELECTRICAL CHARACTERISTICS (continued) = 2.7V to 5.8V, WDI = GND, TH0–TH4 = MARGIN = MR = DBP – IN1 IN4 CC Typical values are +25°C.) (Notes PARAMETER ...
Page 4
Pin-Selectable, Hex Power-Supply Supervisory Circuit = 5V, WDI = GND, TH0–TH4 = MARGIN = MR = DBP – IN1 IN4 CC IN1–IN4 SUPPLY CURRENT vs. IN1–IN4 SUPPLY VOLTAGE 1.00 0. +85°C A 0.90 0.85 ...
Page 5
Pin-Selectable, Hex Power-Supply = 5V, WDI = GND, TH0–TH4 = MARGIN = MR = DBP – IN1 IN4 RESET OUTPUT PROPAGATION DELAY vs. TEMPERATURE 3.00 2.75 2.50 2.25 2.00 1.75 1.50 1.25 1.00 ...
Page 6
... Pin Description (continued) FUNCTION to GND with a 1µF ceramic capacitor as close to the CC supplies power to the internal circuitry see the Powering the MAX6886 section. CC (see the Powering the MAX6886 section). CC (see the Powering the MAX6886 section). CC (see the Powering the MAX6886 section). ...
Page 7
... IN5 IN5 DETECTOR IN6 IN6 DETECTOR VIRTUAL DIODES V CC REFERENCE 1µF 2.55V LDO DBP 1µF *SEE THE VOLTAGE-DETECTOR INPUTS (IN_) SECTION FOR ADJUSTABLE INPUTS. _______________________________________________________________________________________ Supervisory Circuit Functional Diagram DBP DBP MAX6886 GND SWT SRT RESET MR TH0 TH1 TH2 TH3 TH4 7 ...
Page 8
... GND for a logic DBP for a logic 1. Tables 1 and 2 show the 32 unique threshold options available. TH4 sets the threshold tolerance of the undervoltage thresh- old. A logic 1 selects a 5% supply tolerance and a logic 0 selects a 10% supply tolerance. The MAX6886 logic determines which thresholds should be used for CC R1 ...
Page 9
Pin-Selectable, Hex Power-Supply the IN inputs only at power-up. Use the voltage-divider circuit of Figure 1 and Equation 1 to set the threshold for the user-adjustable inputs as described in the Voltage-Detector Inputs (IN_) section. Many microprocessor-based (µP) products require ...
Page 10
Pin-Selectable, Hex Power-Supply Supervisory Circuit Table 2. Threshold Options SELECTION TH4–TH0* IN1 1 11111 4.62 2 11110 4.62 3 11101 4.62 4 11100 4.62 5 11011 4.62 6 11010 4.62 7 11001 4.62 8 11000 4.62 9 10111 3.06 10 ...
Page 11
... The watchdog timer remains cleared while RESET is asserted. The timer starts counting as soon as RESET goes high (see Figure 2). The MAX6886 features two modes of watchdog timer operation: normal and initial modes. At power-up, after a reset event, or after the watchdog timer expires, the ini- ...
Page 12
... RESET is open-drain and requires an external pullup resistor. RESET remains low for 1V ≤ V Pin Configuration TOP VIEW RESET 1 SRT 2 SWT 3 MAX6886 GND 4 *EXPOSED PAD WDI THIN QFN *EXPOSED PAD CONNECTED TO GND. 12 ______________________________________________________________________________________ For better noise immunity, bypass each of the voltage- 6 detector inputs to GND with 0.1µ ...
Page 13
Pin-Selectable, Hex Power-Supply (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) D D/2 MARKING XXXXX PIN # 1 I.D. C -DRAWING NOT TO SCALE- ______________________________________________________________________________________ ...
Page 14
Pin-Selectable, Hex Power-Supply Supervisory Circuit (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) COMMON DIMENSIONS PKG. 16L 5x5 20L 5x5 SYMBOL MIN. NOM. MAX. MIN. ...