MIC2774N-31YM5 TR

MIC2774 Dual Micro-Power Low Voltage Supervisor General Description Features The MIC2774 is a dual power supply supervisor that Monitors two independent power supplies for provides undervoltage monitoring, manual reset capability, undervoltage conditions and power-on reset generation in a compact 5-pin SOT-23 One fixed and one user-adjustable input package. Features include two undervoltage detectors, Choice of ten factory-programmed thresholds one fixed and one adjustable, and a choice of reset Adjustable input can monitor supplies as low as 0.3V outputs. One undervoltage detector compares V against DD a fixed threshold. Ten factory-programmed thresholds are Generates 140ms (min.) power-on reset pulse available. The second, user-adjustable input is compared Manual reset input against a 300mV reference. This low reference voltage Choice of active-high, active-low, or open-drain active- allows for the monitoring of voltages lower than those low reset outputs supported by previous supervisor ICs. Inputs may be pulled above V (7V abs. max.) DD The reset outputs are asserted at power-on and at any /RST output valid down to 1.2V time either voltage drops below the programmed threshold Ultra-low supply current, 3.5A typical voltage and remains asserted for 140ms (min.) after they Rejects brief input transients subsequently rise back above the threshold boundaries. Manual reset functionality can be provided by a switch IttyBitty 5-pin SOT-23 package connected between ground and the /MR input. A wide Pin-compatible upgrade for MAX6306/09/12 choice of voltage thresholds provides for a variety of supply voltages and tolerances. Hysteresis is included to Applications prevent chattering due to noise. Typical supply current is a Monitoring processor ASIC or FPGA core and I/O low 3.5A. voltages Datasheets and support documentation are available on PDAs, hand-held PCs Micrels website at: www.micrel.com. Embedded controllers Telecommunications systems Power supplies Wireless/cellular systems Networking hardware Typical Application IttyBitty is a trademark of Micrel, Inc. Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel, Inc. MIC2774 Ordering Information (1,2) (1,3) (4) Part Number Marking Reset Output Junction Temperature Range Package MIC2774N-XXYM5 UGXX Open-Drain. Active-Low (/RST) 40C to +85C SOT-23-5 MIC2774H-XXYM5 UHXX Active-High. Complementary (RST) 40C to +85C SOT-23-5 MIC2774L-XXYM5 UIXX Active-Low. Complementary (/RST) 40C to +85C SOT-23-5 Note: 1. XX = voltage code, see table below. 2. Order entry part number, add TR. Example: MIC2774N-22YM5 TR. 3. Underbar symbol ( ) may not be to scale. 4. Standard reel SOT-23: Reel diameter is 7 inches, hub diameter is 2 inches, width is 8mm. (5) Standard Voltage Options Voltage Code Typical Application (V ) Nominal Threshold Voltage (V ) DD TH 46 5.0V 5% 4.68V 44 5.0V 10% 4.43V 31 3.3V 5% 3.09V 29 3.3V 10% 2.93V 28 3.0V 5% 2.81V 26 2.85V 5% 2.67V 25 2.7V 5% 2.53V 23 2.5V 5% 2.34V 22 2.4V 5% 2.25V 17 1.8V 5% 1.69V Note: 5. There are ten standard versions available with an order increment of 3,000 pieces. Samples of standard versions are normally available from stock. Contact factory for information on non-standard versions. Available in tape-and-reel only. Part Number Convention March 16, 2015 Revision 2.0 2