EM6324 Datasheet | EM Microelectronic

Description The EM6323/24 are low power, high precision reset ICs featuring a manual reset and a watchdog inputs. They have different threshold voltages and several timeout reset periods (t POR) and watchdog timeout periods (t WD) for maximum flexibility in the application. EM6323 has a manual reset ( MR with internal pull-up) and a watchdog input pins. EM6324 has only a watchdog input pin (WDI). The watchdog function can be disabled by driving WDI with a three-state driver or by leaving WDI unconnected. This is useful when the MCU is in sleep mode. Small SOT23-5L package as well as ultra-low supply current of 3.8μA make the EM6323 and the EM6324 an ideal choice for portable and battery-operated devices. Typical Application VDD GND VDD RESET RESET EM632x - VDD RESET RESET MPU, DSP I/O - REXT for open-drain version only Fig. 1 Features  Ultra-low supply current of 3.8μA (VDD=3.3V)  Operating temperature range: -40°C to +125°C  1.5% reset threshold accuracy  11 reset threshold voltages VTH: 4.63V, 4.4V, 3.08V, 2.93V, 2.8V, 2.63V, 2.3V, 2.2V, 2.0V, 1.8V, 1.66V, 1.57V, 1.38V, 1.31V  200ms reset timeout period (1.6ms, 25ms, 1600ms on request)  1.6s watchdog timeout period (6.2ms, 102ms, 25.6s on request)  3 reset output options: Active-low RESET push-pull Active-low RESET open-drain Active-high RESET push-pull  Detection of microcontroller in sleep mode Applications  Workstations  Point of sales (POS)  Personal puters  Routers, hubs and switches  Handheld GPS  Vending machines and ATM Transition Detector Block Diagram + Voltage Reference - Filter Oscillator Reset Logic + Timer Watchdog Logic + Timer RESET RESET Fig. 2 Pin Configuration EM6323 (manual reset, watchdog) RESET 1 GND 2 5 VDD MR...