Low-Power, Dual-/Triple-Voltage SC70 µP Supervisory Circuits are Ideal for Portable Equipment
The MAX6736–MAX6745 are low-power dual-/triple-voltage microprocessor (µP) supervisors. These devices assert a reset if any monitored supply falls below its factory-trimmed or adjustable threshold and maintain reset for a minimum timeout period after all supplies rise above their thresholds. The integrated dual/triple supervisory circuits significantly reduce size and power compared to separate ICs or discrete components. The low supply current of 6µA makes these devices ideal for portable equipment. The MAX6736/MAX6737 are dual fixed-voltage µP supervisors with a manual reset input. The MAX6738/MAX6739 have one fixed and one adjustable reset threshold and a manual reset input. The MAX6740/MAX6743 are triple-voltage µP supervisors with two fixed and one user-adjustable reset threshold inputs. The MAX6741/MAX6744 are dual-voltage µP supervisors with a power-OK (POK) output ideal for power-supply sequencing. The MAX6742/MAX6745 monitor the primary VCC supply and have an independent power-fail comparator. The MAX6736–MAX6745 monitor I/O supply voltages (VCC1) from 1.8V to 5.0V and core supply voltages (VCC2) from 0.9V to 3.3V with factory-trimmed reset threshold voltage options (Table 1). An external adjustable RSTIN input option allows monitoring voltages down to 0.5V. A variety of push-pull or open-drain reset outputs along with manual reset input and power-fail input/output features are available (see the Selector Guide). The MAX6736–MAX6745 are offered in a space-saving 5-pin SC70 package and operate over the -40°C to +85°C temperature range.
title | Download file |
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MAX6736-MAX6745 Data Sheet | MAX6736-MAX6745.pdf |
Part Number | Option | Interface | Input Chan. | VIN (V) | Oper. Temp. (°C) | Package/Pins | Budgetary Price |
---|---|---|---|---|---|---|---|
max | See Notes | ||||||
MAX6741 | Sequence | Factory Fixed R/C Adjustable | 2 | <6 | -40 to +85 0 to +70 | SC-70/5 | $1.62 @1k |
MAX6744 | SC-70/5 | $1.44 @1k | |||||
Part Number | Reset Thresh. (V) | Reset Out | tRESET | Watchdog Feature | Supervisor Features | Reset Thresh. Accur. (%) | ICC (µA) | Package/Pins | Budgetary Price |
---|---|---|---|---|---|---|---|---|---|
min | @ +25°C | max | See Notes | ||||||
MAX6745 | 0 to 1.2 1.2 to 1.8 1.8 to 2.5 2.5 to 3.3 3.3 to 5.5 | Active Low Push-Pull | 85ms to 300ms >1s | No Watchdog | Power Fail Comparator/Low Battery Detect | 3 | 10 | SC-70/5 | $1.59 @1k |
Part Number | Interface | Reset Thresh. (V) | Reset Out | tRESET | Watchdog Feature | Supervisor Features | Reset Thresh. Accur. (%) | ICC (µA) | Package/Pins | Budgetary Price |
---|---|---|---|---|---|---|---|---|---|---|
min | @ +25°C | max | See Notes | |||||||
MAX6736 | Factory Fixed | 0 to 1.2 1.2 to 1.8 1.8 to 2.5 2.5 to 3.3 3.3 to 5.5 | Active Low Open Drain | 85ms to 300ms >1s | No Watchdog | Manual Reset | 3 | 12 | SC-70/5 | $1.19 @1k |
MAX6737 | Factory Fixed | Active Low Push-Pull | Manual Reset | 12 | SC-70/5 | $1.19 @1k | ||||
MAX6738 | Factory Fixed R/C Adjustable | Active Low Open Drain | Adjustable Reset Input Manual Reset | 10 | SC-70/5 | $1.48 @1k | ||||
MAX6741 | Factory Fixed R/C Adjustable | Active Low Open Drain | Manual Reset | 12 | SC-70/5 | $1.62 @1k | ||||
MAX6744 | Factory Fixed R/C Adjustable | Active Low Push-Pull | - | 12 | SC-70/5 | $1.44 @1k | ||||
Part Number | Interface | Reset Thresh. (V) | Reset Out | tRESET | Watchdog Feature | Supervisor Features | Reset Thresh. Accur. (%) | ICC (µA) | Package/Pins | Budgetary Price |
---|---|---|---|---|---|---|---|---|---|---|
min | @ +25°C | max | See Notes | |||||||
MAX6740 | Factory Fixed R/C Adjustable | 0 to 1.2 1.2 to 1.8 1.8 to 2.5 2.5 to 3.3 3.3 to 5.5 | Active Low Open Drain | 85ms to 300ms >1s | No Watchdog | Adjustable Reset Input Manual Reset | 3 | 12 | SC-70/5 | $1.38 @1k |
MAX6743 | Active Low Push-Pull | Adjustable Reset Input | SC-70/5 | $1.39 @1k | ||||||
Part Number | Status | Recommended Replacement | Package | Temp | RoHS |
---|---|---|---|---|---|
MAX6745XKLD3+T | Active | SC-70,;5 pin;5.3 mm² | -40°C to +85°C | Lead Free | |
MAX6745XKLD3-T | Active | SC-70,;5 pin;5.3 mm² | -40°C to +85°C | No | |
MAX6745XKLD7-T | No Longer Available | SC-70,;5 pin;5.3 mm² | -40°C to +85°C | No | |
MAX6745XKMD3-T | Active | SC-70,;5 pin;5.3 mm² | -40°C to +85°C | No | |
MAX6745XKMD7-T | Active | SC-70,;5 pin;5.3 mm² | -40°C to +85°C | No | |
MAX6745XKRD3+ | Active | SC-70,;5 pin;5.3 mm² | -40°C to +85°C | Lead Free | |
MAX6745XKRD3+T | Active | SC-70,;5 pin;5.3 mm² | -40°C to +85°C | Lead Free | |
MAX6745XKRD3-T | No Longer Available | MAX6745XKRD3+T | SC-70,;5 pin;5.3 mm² | -40°C to +85°C | No |
MAX6745XKRD7-T | Active | SC-70,;5 pin;5.3 mm² | -40°C to +85°C | No | |
MAX6745XKSD3+ | Active | SC-70,;5 pin;5.3 mm² | -40°C to +85°C | Lead Free | |
Part Number | Status | Recommended Replacement | Package | Temp | RoHS |
MAX6745XKSD3+T | Active | SC-70,;5 pin;5.3 mm² | -40°C to +85°C | Lead Free | |
MAX6745XKSD3-T | No Longer Available | MAX6745XKSD3+T | SC-70,;5 pin;5.3 mm² | -40°C to +85°C | No |
MAX6745XKSD7-T | Active | SC-70,;5 pin;5.3 mm² | -40°C to +85°C | No | |
MAX6745XKTD3-T | Active | SC-70,;5 pin;5.3 mm² | -40°C to +85°C | No | |
MAX6745XKTD7-T | Active | SC-70,;5 pin;5.3 mm² | -40°C to +85°C | No | |
MAX6745XKVD3+T | Active | SC-70,;5 pin;5.3 mm² | -40°C to +85°C | Lead Free | |
MAX6745XKVD3-T | No Longer Available | MAX6745XKVD3+T | SC-70,;5 pin;5.3 mm² | -40°C to +85°C | No |
MAX6745XKVD7-T | Active | SC-70,;5 pin;5.3 mm² | -40°C to +85°C | No | |
MAX6745XKWD3-T | No Longer Available | SC-70,;5 pin;5.3 mm² | -40°C to +85°C | No | |
MAX6745XKWD7-T | Active | SC-70,;5 pin;5.3 mm² | -40°C to +85°C | No | |
Part Number | Status | Recommended Replacement | Package | Temp | RoHS |
MAX6745XKYD3-T | Active | SC-70,;5 pin;5.3 mm² | -40°C to +85°C | No | |
MAX6745XKYD7-T | Active | SC-70,;5 pin;5.3 mm² | -40°C to +85°C | No | |
MAX6745XKZD3+ | Active | MAX6745XKZD3+T | SC-70,;5 pin;5.3 mm² | -40°C to +85°C | Lead Free |
MAX6745XKZD3+T | Active | SC-70,;5 pin;5.3 mm² | -40°C to +85°C | Lead Free | |
MAX6745XKZD3-T | No Longer Available | MAX6745XKZD3+T | SC-70,;5 pin;5.3 mm² | -40°C to +85°C | No |
MAX6745XKZD7-T | Active | SC-70,;5 pin;5.3 mm² | -40°C to +85°C | No |