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.
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MAX6467-MAX6468 Data Sheet | MAX6467-MAX6468.pdf |
Part Number | Monitored Voltages | Manual Reset Feature | MR1 Setup Time | Reset Thresh. (V) | Reset Out | tRESET | Reset Thresh. Accur. (%) | ICC (µA) | Package/Pins | Budgetary Price |
---|---|---|---|---|---|---|---|---|---|---|
min | @ +25°C | max | See Notes | |||||||
MAX6467 | 1 | One-Shot | 1µs | 1.2 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 | 1.5 | 13 | SC-70/4 SOT/4 | $1.11 @1k |
MAX6468 | Active Low Push-Pull | SC-70/4 SOT/4 | ||||||||
Part Number | Switch Inputs | Edge Triggered | Functions | Debounce Duration (ms) | Output Polarity | Output Type | Switch Inputs (±V) | ESD Protect. (±kV) | ICC (µA) | Oper. Temp. (°C) | Package/Pins | Budgetary Price |
---|---|---|---|---|---|---|---|---|---|---|---|---|
max | max | See Notes | ||||||||||
MAX6467 | 1 | Falling Edge | Non-Retriggerable One-Shot | 85 to 300 | Active Low | Open-Drain | +5.5 | 2 | 13 | -40 to +85 -40 to +125 0 to +70 | SC-70/4 SOT/4 | $1.11 @1k |
MAX6468 | Push-Pull | SC-70/4 SOT/4 | ||||||||||
Part Number | Status | Recommended Replacement | Package | Temp | RoHS |
---|---|---|---|---|---|
MAX6467US16D3 | No Longer Available | MAX6467US16D3+ | SOT,;4 pin;8 mm² | -40°C to +85°C | No |
MAX6467US16D3+ | Active | SOT,;4 pin;8 mm² | -40°C to +85°C | Lead Free | |
MAX6467US16D3+T | Active | SOT,;4 pin;8 mm² | -40°C to +85°C | Lead Free | |
MAX6467US16D3-T | No Longer Available | MAX6467US16D3+T | SOT,;4 pin;8 mm² | -40°C to +85°C | No |
MAX6467US16D7+T | Active | SOT,;4 pin;8 mm² | -40°C to +85°C | Lead Free | |
MAX6467US16D7-T | No Longer Available | SOT,;4 pin;8 mm² | -40°C to +85°C | No | |
MAX6467US17D3+T | Active | SOT; | -40°C to +85°C | See data sheet | |
MAX6467US17D3-T | Active | SOT,;4 pin;8 mm² | -40°C to +85°C | No | |
MAX6467US17D7+T | Active | SOT; | -40°C to +85°C | See data sheet | |
MAX6467US17D7-T | Active | SOT,;4 pin;8 mm² | -40°C to +85°C | No | |
Part Number | Status | Recommended Replacement | Package | Temp | RoHS |
MAX6467US18D3+T | Active | SOT; | -40°C to +85°C | See data sheet | |
MAX6467US18D3-T | No Longer Available | SOT,;4 pin;8 mm² | -40°C to +85°C | No | |
MAX6467US18D7+T | Active | SOT; | -40°C to +85°C | See data sheet | |
MAX6467US18D7-T | Active | SOT,;4 pin;8 mm² | -40°C to +85°C | No | |
MAX6467US19D3+T | Active | SOT; | -40°C to +85°C | See data sheet | |
MAX6467US19D3-T | Active | SOT,;4 pin;8 mm² | -40°C to +85°C | No | |
MAX6467US19D7+T | Active | SOT; | -40°C to +85°C | See data sheet | |
MAX6467US19D7-T | Active | SOT,;4 pin;8 mm² | -40°C to +85°C | No | |
MAX6467US20D3+T | Active | SOT; | -40°C to +85°C | See data sheet | |
MAX6467US20D3-T | Active | SOT,;4 pin;8 mm² | -40°C to +85°C | No | |
Part Number | Status | Recommended Replacement | Package | Temp | RoHS |
MAX6467US20D7+T | Active | SOT; | -40°C to +85°C | See data sheet | |
MAX6467US20D7-T | Active | SOT,;4 pin;8 mm² | -40°C to +85°C | No | |
MAX6467US21D3+T | Active | SOT; | -40°C to +85°C | See data sheet | |
MAX6467US21D3-T | Active | SOT,;4 pin;8 mm² | -40°C to +85°C | No | |
MAX6467US21D7+T | Active | SOT; | -40°C to +85°C | See data sheet | |
MAX6467US21D7-T | Active | SOT,;4 pin;8 mm² | -40°C to +85°C | No | |
MAX6467US22D3+ | Active | SOT,;4 pin;8 mm² | -40°C to +85°C | Lead Free | |
MAX6467US22D3+T | Active | SOT,;4 pin;8 mm² | -40°C to +85°C | Lead Free | |
MAX6467US22D3-T | No Longer Available | MAX6467US22D3+T | SOT,;4 pin;8 mm² | -40°C to +85°C | No |
MAX6467US22D7+T | Active | SOT; | -40°C to +85°C | See data sheet | |
Part Number | Status | Recommended Replacement | Package | Temp | RoHS |
MAX6467US22D7-T | Active | SOT,;4 pin;8 mm² | -40°C to +85°C | No | |
MAX6467US23D3+T | Active | SOT; | -40°C to +85°C | See data sheet | |
MAX6467US23D3-T | Active | SOT,;4 pin;8 mm² | -40°C to +85°C | No | |
MAX6467US23D7+T | Active | SOT; | -40°C to +85°C | See data sheet | |
MAX6467US23D7-T | Active | SOT,;4 pin;8 mm² | -40°C to +85°C | No | |
MAX6467US24D3+T | Active | SOT; | -40°C to +85°C | See data sheet | |
MAX6467US24D3-T | Active | SOT,;4 pin;8 mm² | -40°C to +85°C | No | |
MAX6467US24D7+T | Active | SOT; | -40°C to +85°C | See data sheet | |
MAX6467US24D7-T | Active | SOT,;4 pin;8 mm² | -40°C to +85°C | No | |
MAX6467US25D3+T | Active | SOT; | -40°C to +85°C | See data sheet | |
Part Number | Status | Recommended Replacement | Package | Temp | RoHS |
MAX6467US25D3-T | No Longer Available | MAX6467US25D3+T | SOT,;4 pin;8 mm² | -40°C to +85°C | No |
MAX6467US25D7+T | Active | SOT; | -40°C to +85°C | See data sheet | |
MAX6467US25D7-T | Active | SOT,;4 pin;8 mm² | -40°C to +85°C | No | |
MAX6467US26D3+ | Active | SOT,;4 pin;8 mm² | -40°C to +85°C | Lead Free | |
MAX6467US26D3+T | Active | SOT,;4 pin;8 mm² | -40°C to +85°C | Lead Free | |
MAX6467US26D3-T | No Longer Available | MAX6467US26D3+T | SOT,;4 pin;8 mm² | -40°C to +85°C | No |
MAX6467US26D7+T | Active | SOT; | -40°C to +85°C | See data sheet | |
MAX6467US26D7-T | Active | SOT,;4 pin;8 mm² | -40°C to +85°C | No | |
MAX6467US27D3+T | Active | SOT; | -40°C to +85°C | See data sheet | |
MAX6467US27D3-T | No Longer Available | SOT,;4 pin;8 mm² | -40°C to +85°C | No |