CM3400

CM3400 Micropower, Universal Supply Voltage Supervisor (SVS) Features Temperature stable 1.0V trigger reference User adjustable reset threshold User adjustable reset delay time > 25msec Complimentary outputs (RESET, RESET) Integrated pull-up/down resistors Manual reset (MR) control input Low operating current (40µA typ.) 8-lead MSOP and SOIC package Product Description The CM3400 is a universal supply voltage supervisory (SVS) controller for critical power monitoring and power sequencing applications. During an initial power-up, both complimentary outputs (RESET, RESET) remain active. Once the supply voltage being monitored exceeds the user programmed reset threshold, the outputs will remain active for an additional timeout interval which is also user controlled. Both outputs become inactive once the delay interval has expired. The user controlled reset threshold is determined by two external resistors as follows: Reset Threshold [V] = (R1 + R2) / R2 The delay time is set by an external capacitor CT, as follows (where CT is in [nF]): Reset Delay [ms] = (375 x CT[nF]) + 25 [ms] During a brown-out condition, both outputs will immediately become active and remain active until the supply being monitored has been restored for a period exceeding the delay pulse. During a complete powerdown situation, both outputs will continually "hug" their respective rails. This is achieved by the use of integrated pull-up/down resistors. The CM3400 is available in a low profile ...