Features: • Monitors two independent power supplies for undervoltage conditions
• One fixed and one user adjustable input
• Choice of factory-programmed thresholds
• Adjustable input can monitor supplies as low as 0.3V
• Generates 140ms (minimum) power-on reset pulse
• Manual reset input
• Choice of active-high, active-low, or open-drain activelow reset outputs
• Inputs may be pulled above VDD (7V abs. max.)
• Open-drain output can be pulled above VDD (7V abs max.)
• /RST output valid down to 1.2V
• Ultra-low supply current, 3.5A typical
• Rejects brief input transients
• IttyBitty™ 5-lead SOT-23 package
• Pin compatible upgrade for MAX6306/09/12Application• Monitoring processor ASIC, or FAGA core and I/O voltages
• PDAs, hand-held PCs
• Embedded controllers
• Telecommunications systems
• Power supplies
• Wireless / Cellular systems
• Networking hardwarePinout
SpecificationsSupply Voltage (VDD) ............................... 0.3V to +7V
Input Voltages (VIN, V/MR) ....................... 0.3V to +7V
Output Voltages (V/RST, VRST) ................. 0.3V to +7V
RST, (/RST) Current ................................................20mA
Storage Temperature (TS) ............... 65°C to +150°C
ESD Rating, Note 3 ................................................ 1.5kVDescriptionThe MIC2774 is a dual power supply supervisor that provides under-voltage monitoring, manual reset capability, and power-on reset generation in a compact 5-pin SOT package. MIC2774 features include two under-voltage detectors, one fixed and one adjustable, and a choice of reset outputs. One under-voltage detector compares VDD against a fixed threshold. Ten factory-programmed thresholds are available. The second, user-adjustable input is compared against a 300mV reference. This low reference voltage allows monitoring voltages lower than those supported by previous supervisor ICs.
The reset outputs of MIC2774 are asserted at power-on and any time either voltage drops below the programmed threshold voltages and remains asserted for 140ms (min.) after they subsequently rise back above the threshold boundaries. Manual reset functionality of MIC2774 can be provided by a switch connected between ground and the /MR input. A wide choice of voltage thresholds provides for a variety of supply voltages and tolerances. Hysteresis is included to prevent chattering due to noise. Typical supply current is a low 3.5µA.
The MIC2774 is a dual power supply supervisor that provides under-voltage monitoring, manual reset capability, and poweron reset generation in a compact 5-pin SOT package. MIC2774 features include two under-voltage detectors, one fixed and one adjustable, and a choice of reset outputs. One under-voltage detector compares VDD against a fixed threshold. Ten factory-programmed thresholds are available. The second, useradjustable input is compared against a 300mV reference.This low reference voltage allows monitoring voltages lower than those supported by previous supervisor ICs.
The reset outputs of MIC2774 are asserted at power-on and any time either voltage drops below the programmed threshold voltages and remains asserted for 140ms (min.) after they subsequently rise back above the threshold boundaries. Manual reset functionality of MIC2774 can be provided by a switch connected between ground and the /MR input. A wide choice of voltage thresholds provides for a variety of supply voltages and tolerances. Hysteresis is included to prevent chattering due to noise. Typical supply current is a low 3.5A.
MIC2774 Data Sheet
