V6309

® EM MICROELECTRONIC-MARIN SA V6309/V6319 3-Pin Microprocessor Reset Circuit Features n Precision monitoring of 3 V, 3.3 V and 5 V power n Fully specified over the temperature range of n 140 ms minimum power-on reset pulse width: Typical Operating Configuration supply voltages -40 to + 125 oC n n n n n n RESET output for V6309 RESET output for V6319 16 µA supply current Garanteed RESET/RESET valid to VDD = 1 V Power supply transient immunity No external components needed 3-pin SOT-23 package Fully compatible with MAX809/MAX810 and AMD809/AMD810 Description The V6309 and V6319 are microprocessor supervisory circuits used to monitor the power supplies in µP and digital systems. They provide excellent circuit reliability and low cost by eliminating external components and adjustments when used with 5 V powered or 3 V powered circuits. These circuits perform a single function: they assert a reset signal whenever the VDD supply voltage declines below a preset threshold, keeping it asserted for at least 140 ms after VDD has risen above the reset threshold. The only difference between the two devices is that the V6309 has an active-low RESET output (which is guaranteed to be in the correct state for VDD down to 1 V), while the V6319 has an active-high RESET output. The reset comparator is designed to ignore fast transients on VDD. Reset thresholds suitable for operation with a variety of supply voltages are available. Low supply current makes the V6309/V6319 ideal for use in...