EM MICROELECTRONIC-MARIN SA H6052 3-Pin Voltage Surveillance with Time-out Features n n n n n n n n n Typical Operating Configuration Proper microprocessor restart after power up Processor reset at power down On-chip oscillator gives a typical POR of 160 ms Reset output working down to 1.6 V No external components required Very small mounting space TO-92 package SOT-223 package Sensitivity typically 10 µs Description The H6052 is a CMOS device whichmonitors the supply voltage and controls the reset of the microprocessor. Upon the supply voltage rising above VTH ON, the reset output, whether RES or RES, will remain active (RES = 1, RES = 0) for an additional 160 ms. This allows the system voltage and the oscillator of the microprocessor system to stabilize before the system becomes fully active. When VDD drops below VTH OFF, the reset output goes active (RES = 1, RES = 0). Applications All microprocessor and microcontroller applications where an automatic restart of the micreoprocessor after power down is required: n n n n White goods Brown goods Automotive electronics Industrial electronics 1 H6052 Absolute Maximum Ratings Handling Procedures This device has built-in protection against high static voltages or electric fields; however, anti-static precautions precautions be taken as for any other CMOS component. Unless otherwise specified, proper operation can only occur when all terminal voltages are kept within the supply voltage range. Unused inputs must always be tied to a defined logic voltage level. Table 1 Operating Conditions Stresses above these listed maximum ratings may cause permanent damage to the device. Exposure beyond specified operating conditions may affect device reliability or cause malfunction. Parameter Symbol Min. Typ. Max. Units Operating temperature Positive supply voltage TA VDD -40 1.6 O +85 5.5 C V Table 2 Electrical Characteristics VDD = 5.0 V 10%, TA = -40 to +85OC, unless otherwise specified Parameter Symbol Test Conditions Supply current Supply voltage: Power on threshold* Power off threshold* IDD RES or RES open VTH ON VTH OFF TA = +25OC TA = +25OC RES Output High Level RES Output Low Level RES Output Low Level VOH VOL VOL IOH = 2 mA VDD = 3.5 V, IOL = 2mA VDD = 1.6 V, IOL = 400 µA RES Output Low Level RES Output High Level RES Output High Level VOL VOH VOH IOL = 4 mA VDD = 3.5 V, IOH = 1.5 mA VDD = 1.6 V, IOH = 80 µA Min. 3.6 2.8* Typ. Max. 80 140 µA 4 3.2* 4.4 3.6* V V 0.4 0.4 V V V VDD - 0.4 0.4 VDD - 0.4 VDD - 0.4 Units V V V Table 3 * VTH ON is related to VTH OFF. Typically, VTH OFF = VTH ON - 0.8 V Timing Characteristics VDD = 5.0 V 10%, TA = -40 to +85OC, unless otherwise specified Parameter Power on reset Power on reset Symbol tPOR tPOR Test Conditions Min. 100 TA = +25OC Typ. 160 Max. 350 250 Units ms ms Table 4 2 H6052 Timing Waveforms VDD VTH ON VTH OFF 1.6 V tPOR t tPOR Logic “1” RES Logic “0” t Logic “1” RES Logic “0” Fig.3 t Block Diagram VDD Bandgap Ref. RES or RES Comparator Reset Control OSC Timer Vss Fig.4 Pin Description SOT-223 TO-92 Table 6 3 H6052 Typical Applications Power On Reset VDD VDD VDD RES VDD RES RES µP H6052 1 H6052 2 VSS RES µP VSS GND GND Fig. 5 Ordering Information The H6052 is available in the following pacakges: Part number: H6052 1 H6052 1 H6052 2 H6052 2 Package; TO-92 SOT-223 TO-92 SOT-223 Reset Output Reset Output Reset Output Reset Output When ordering please specify complete part number and package. EM Microelectronic-Marin SA cannot assume responsibility for use of any circuitry described other than circuitry entirely embodied in an EM Microelectronic-Marin SA product. EM Microelectronic-Marin SA reserves the right to change the circuitry and specifications without notice at any time. You are strongly urged to ensure that the information given has not been superseded by a more up-to-date 2000 EM Microelectronic-Marin SA,10/00, Rev. H/328 4