MIC2776 Micrel Semiconductor, MIC2776 Datasheet
MIC2776
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MIC2776 Summary of contents
Page 1
... 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 3.0µ ...
Page 2
... MIC2776 Pin Function RST Digital (Output): Asserted high whenever V voltage. It will remain asserted for no less than 140ms after V above the threshold limit. /RST Digital (Output): Asserted low whenever V voltage. It will remain asserted for no less than 140ms after V above the threshold limit. (open-drain for “ ...
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... IN /MR (H and L versions) ....... –0. ............. –40°C to +85° ...................... 256°C/W JA Min Typ Max 3.0 295 300 305 140 280 0.3 0.3 0.8V DD 0.8V DD 0. 100 100 = 1.2V. DD Micrel + 0.3V DD Units µ µ µ MIC2776 ...
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... RST /RST V OL MIC2776 RST RST t RST Propagation delays not shown for clarity. Note A. The MIC2776 ignores very brief transients. See “Applications Information” for details HYST V REF >t min t RST September 29, 2000 Micrel ...
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... RST, /RST Reset Output Typically, the MIC2776 is used to monitor the power supply of intelligent circuits such as microcontrollers and micropro- cessors. By connecting the reset output of a MIC2776 to the reset input of a µC or µP, the processor will be properly reset at power-on and during power-down and brown-out condi- ...
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... TOTAL Application Example Figure 1 below illustrates a hypothetical MIC2776 application in which the MIC2776 is used to monitor the core supply of a high-performance CPU or DSP. The core supply, V this example is 1.0V ±5%. The main power rail and I 2.5V ±5%. As shown in Figure 1, the MIC2776 voltage, V I/O is powered by V ...
Page 7
... Very brief transients may exceed the voltage threshold without tripping the output. As shown in Figure 3, the narrower the transient, the deeper the threshold overdrive that will be ignored by the MIC2776. The graph represents the typical allowable transient duration for a given amount of threshold overdrive that will not gener- ate a reset ...
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... This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel Inc. MIC2776 1.75 (0.069) 3.00 (0.118) 1 ...