MAX6887 MAXIM [Maxim Integrated Products], MAX6887 Datasheet
MAX6887
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MAX6887 Summary of contents
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... MR to generate resets when the watchdog timer expires. RESET, OV, and WDO are active-low, open- drain outputs. The MAX6887/MAX6888 are available in a 5mm x 5mm x 0.8mm, 16-pin thin QFN package and operate over the extended -40°C to +85°C temperature range. Multivoltage Systems ...
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... TH For V < highest V and – IN_ IN1 IN4 R V < V (not ADJ), thresholds are not set IN IN_ CC as adjustable IN5, IN6 (MAX6887 only IN1–IN4 set as adjustable thresholds ≥ 2. IN_ falling/rising, 100mV overdrive D 4mA, output asserted ...
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Hex/Quad, Power-Supply Supervisory Circuits ELECTRICAL CHARACTERISTICS (continued) = 2.7V to 5.8V, WDI = GND, MARGIN = – IN1 IN4 +25°C.) (Notes PARAMETER SYMBOL MR, MARGIN, WDI ...
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... IN_ THRESHOLD OVERDRIVE (mV) PIN NAME MAX6887 MAX6888 Open-Drain, Active-Low Reset Output. RESET asserts when any input voltage falls below its RESET undervoltage threshold or when MR is pulled low. RESET remains low for 200ms after all 1 1 assertion-causing conditions are cleared. An external pullup resister is required. ...
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... Powering the MAX6887/MAX6888 section). For improved noise immunity, CC (see the Powering the MAX6887/MAX6888 section). For improved noise immunity, CC (see the Powering the MAX6887/MAX6888 section). For improved noise immunity, CC (see the Powering the MAX6887/MAX6888 section). For improved noise immunity, CC Pin Description (continued) to GND with a 1µ ...
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... IN6 IN6 DETECTOR (N.C REFERENCE 1µF 2.55V LDO BP 1µF *FOR ADJUSTABLE INPUTS REFER TO THE ADJUSTABLE THRESHOLD INPUTS SECTION. 6 _______________________________________________________________________________________ *IN_ DETECTOR RESET TIMING BLOCK OV TIMING BLOCK WDO TIMING BLOCK MAX6887 MAX6888 GND Functional Diagram WDI MARGIN MR RESET OV WDO ( ) MAX6888 ONLY ...
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... Selector Guide). The 5% and 10% tolerances are based on maximum and minimum threshold values. Actual thresholds for the MAX6887/MAX6888 are shown in Tables 1 and 2. Inputs in the Selector Guide listing “Adj” allow an exter- nal voltage-divider to be connected to set a user- defined threshold. ...
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... V = × ⎜ ACTUALUV MON ⎝ ⎛ × ⎜ ACTUALOV MON ⎝ Table 1. MAX6887 Threshold Options UV THRESHOLDS (V) PART IN1 IN2 MAX6887AETE 4.620 3.060 2.310 MAX6887BETE 4.620 3.060 2.310 MAX6887CETE 4.620 3.060 1.670 MAX6887DETE 3.060 2.310 1.670 MAX6887EETE 3 ...
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... The state of RESET, OV, and WDO does not change while MARGIN = GND. RESET , OV , and WDO Outputs The MAX6887/MAX6888 feature three active-low open- drain outputs: RESET, OV, and WDO. After power-up or overvoltage/undervoltage conditions, RESET and OV remain in their active states until their timeout periods expire and no undervoltage/overvoltage conditions are present (see Figure 2) ...
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Hex/Quad, Power-Supply Supervisory Circuits OVERVOLTAGE THRESHOLD V IN PRIMARY THRESHOLD OV RESET Figure 2. Output Timing Diagram 2. IN1–IN4 CC WDO RESET WDI D-PO RP WDI WDO NOT CONNECTED THE INITIAL ...
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Hex/Quad, Power-Supply Supervisory Circuits At power-up, WDO goes high after t The initial watchdog timeout period (t diately after WDO is high. The initial watchdog timeout period allows the µP to perform its initialization process. A normal watchdog timeout period ...
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... MAX6887 MAX6888 WDI MR GND Pin Configurations I. WDI MAX6888 15 6 MARGIN 16 *EXPOSED PAD THIN QFN *EXPOSED PAD CONNECTED TO GND. Typical Operating Circuit 12V 5V 3.3V 2.5V 1.8V 1. LOGIC INPUT LOGIC INPUT µP RESET LOGIC OUTPUT GND *MAX6887 ONLY ...
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Hex/Quad, Power-Supply Supervisory Circuits (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.) ______________________________________________________________________________________ Package Information 13 ...
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Hex/Quad, Power-Supply Supervisory Circuits (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.) Revision History Pages changed at Rev Maxim cannot assume ...