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MIC2776

Micrel Semiconductor
Part Number MIC2776
Manufacturer Micrel Semiconductor
Description Micro-Power Low Voltage Supervisor
Published Mar 26, 2005
Detailed Description MIC2776 Micrel MIC2776 Micro-Power Low Voltage Supervisor Advance Information General Description The MIC2776 is a po...
Datasheet PDF File MIC2776 PDF File

MIC2776
MIC2776

Overview
MIC2776 Micrel MIC2776 Micro-Power Low Voltage Supervisor Advance Information General Description The MIC2776 is a power supply supervisor which provides under-voltage monitoring and power-on reset generation in a compact 5-pin SOT package.
Features include an adjustable under-voltage detector, a delay-generator, a manual reset input, and a choice of active-high, active-low, or open-drain active-low reset output.
The user-adjustable monitoring input is compared against a 300mV reference.
This low reference voltage allows monitoring voltages lower than those supported by previous supervisor ICs.
The reset output is asserted for no less than 140ms at poweron and any time the input voltage drops below the reference voltage.
It remains asserted for the timeout period after the input voltage subsequently rises back above the threshold boundary.
A reset can be generated at any time by asserting the manual reset input, /MR.
The reset output will remain active at least 140ms after the release of /MR.
The /MR input can also be used to daisy-chain the MIC2776 onto existing power monitoring circuitry or other supervisors.
Hysteresis is included to prevent chattering due to noise.
Typical supply current is a low 3.
0µA.
Features • User-adjustable input can monitor supplies as low as 0.
3V • ±1.
5% threshold accuracy • Separate VDD input • Generates power-on reset pulse (140ms min.
) • Manual reset input • Choice of active-high, active-low or open-drain activelow reset output • Inputs can be pulled above VDD (7V abs.
max.
) • Open-drain output can be pulled above VDD (7V abs.
max.
) • Ultra-low supply current, 3.
0µA typical • Rejects brief input transients • IttyBitty™ SOT-23-5 package Applications • • • • • • • • Monitoring processor, ASIC, or FPGA core voltage Computer systems PDAs/Hand-held PCs Embedded controllers Telecommunications systems Power supplies Wireless / cellular systems Networking hardware Temperature Range –40°C to +85°C –40°C to +85°C –40°C to +85°C Package SOT...


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