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MAX6337US22D3-T Datasheet(PDF) 5 Page - Maxim Integrated Products |
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MAX6337US22D3-T Datasheet(HTML) 5 Page - Maxim Integrated Products |
5 / 8 page 4-Pin, Ultra-Low-Voltage, Low-Power µP Reset Circuits with Manual Reset _______________________________________________________________________________________ 5 VCC GND MAX6336 RESET MR 100k (a) VCC GND MAX6335 RESET 100k* (b) *ASSUMES HIGH-Z RESET INPUT TO THE µP MR * Factory-trimmed reset thresholds are available in approximately 100mV increments, with a ±1.8% room-temperature variance. TA = +25°C TA = -40°C to +85°C MIN TYP MAX MIN MAX MAX633_US25D_ 2.46 2.50 2.55 2.43 2.58 MAX633_US24D_ 2.36 2.40 2.44 2.33 2.47 MAX633_US23D_ 2.26 2.30 2.34 2.23 2.37 MAX633_US22D_ 2.16 2.20 2.24 2.13 2.27 MAX633_US21D_ 2.06 2.10 2.14 2.04 2.16 MAX633_US20D_ 1.96 2.00 2.04 1.94 2.06 MAX633_US19D_ 1.87 1.90 1.93 1.84 1.96 MAX633_US18D_ 1.77 1.80 1.83 1.75 1.85 MAX633_US17D_ 1.67 1.70 1.73 1.65 1.75 MAX633_US16D_ 1.57 1.60 1.63 1.55 1.65 RESET THRESHOLD SUFFIX Table 1. Factory-Trimmed Reset Thresholds* Figure 2. Ensuring Reset Valid down to VCC = 0 (Figure 2a). The pull-down resistor value is not critical; 100k Ω is large enough not to load RESET, and small enough to pull it low. For the MAX6335, where RESET must be valid to VCC = 0, a 100kΩ pull-up resistor between RESET and VCC will hold RESET high when VCC falls below 0.7V (Figure 2b). Since the MAX6337 has an open-drain, active-low out- put, it typically uses a pull-up resistor. With this device, RESET will most likely not maintain an active condition, but will drift to a non-active level due to the pull-up resistor and the reduced sinking capability of the open- drain device. Therefore, this device is not recommend- ed for applications where the RESET pin is required to be valid down to VCC = 0. |
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