ACE809 3-Pin Microprocessor Reset Circuits Description The ACE809 is a cost-effective system supervisor Integrated Circuit (IC) designed to monitor VCC in digital and mixed signal systems and provide a warning signal when the system power supply is out of working range, and a reset signal to the host processor when necessary. No external components are required. The reset output is driven active within 20μsec of VCC falling through the reset voltage threshold. Reset is maintained active after VCC rises above the reset threshold. The ACE809 has an active-low RESET output. The output of the ACE809 is guaranteed valid down to VCC=1V. The ACE809 is characterized for operation from -40℃ to 85℃, junction temperature. The ACE809 is optimized to reject fast transient glitches on the VCC line. Low supply current of 7μA (VCC=3.3V) makes these devices suitable for battery powered applications. The output voltages range from 1.7V to 4.5V in 100mV increments. Standard voltage versions are 2.30, 2.63, 2.93, 3.08, 4.0, 4.38, and 4.63V. Features Precision Vcc Monitor for 2.8V, 3.0V,3.3V and 5.0V Supplies 150ms Guaranteed Minimum RESET Output Duration RESET Output Guaranteed to Vcc=1.0V Low 7μA Supply Current. Vcc Transient Immunity. No External Components. ESD rating is 7KV(HBM) Wide operating temperature: -40℃ to 85℃ Application Embedded systems Computers Critical μP power supply monitoring Battery powered equipment Absolute Maximum Ratings(1) Parameter Symbol Max Unit Supply Voltage VCC 5.5 V Output Voltage RESET -0.3 to (Vcc+0.3) Input Current Output Current Power Dissipation 20 IOUT PD Output short circuit duration mA 20 Internally Limited V mA (3) Infinite Thermal resistance junction to ambient θJA 230 ℃/W Operating Temperature Range TA -40~85 ℃ Operating junction temperature range TJ 0 to 125 ℃ Storage temperature range TS -60 to 150 ℃ VER 1.3 1 ACE809 3-Pin Microprocessor Reset Circuits Operating Rating(2) Parameter Symbol Value Unit Supply Input Voltage VCC 2.0 to 5.5 V Junction Temperature TJ 0 to 125 ℃ Note: 1.Exceeding the absolute maximum rating may damage the device. 2.The device is not guaranteed to function outside its operating rating. 3.The maximum allowable power dissipation at any TA (ambient temperature) is calculated using: PD(MAX) = (TJ(MAX) – TA)/ΘJA. Exceeding the maximum allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown. See “Thermal Consideration” section for details 4. RESET threshold temperature coefficient is the worst case voltage change divided by the total temperature range. Packaging Type SOT-23-3 3 1 2 SOT-23-3 Description Function 1 GND Ground 2 RESET RESET output remains low while Vcc is below the reset voltage threshold and for 240msec(typ.) after Vcc rises above reset threshold 3 Vcc Supply Voltage (typ.) Ordering information ACE809 X XX + H Halogen - free Pb - free BM: SOT-23-3 Voltage : L: 4.63V / M: 4.38V / J: 4.00V / T: 3.08V / S: 2.93V / R: 2.63V VER 1.3 2 ACE809 3-Pin Microprocessor Reset Circuits Electrical Characteristics Vcc=5V for L/M/J ;3.3V for T/S ;3.0V for R ,TA = 25°C, unless otherwise specified. Parameter Symbol Input Voltage Vcc Supply Current Icc Reset Threshold VTH Conditions Min. 2.0 ACE809-4.63 ACE809-4.38 ACE809-4.00 ACE809-3.08 ACE809-2.93 ACE809-2.63 ACE809-2.3V 4.51 4.27 3.90 3.00 2.85 2.56 2.18 Reset Threshold Temperature Coefficient(4) Vcc to Reset Delay Vcc=VTH to (VTH-100mV) Reset Active Timeout Period RESET Output Voltage Low VOL RESET Output Voltage High VOH Typ. Max. 7 4.63 4.38 4.00 3.08 2.93 2.63 2.25 Unit 5.5 V 10 4.75 4.49 4.10 3.16 3.00 2.70 2.33 uA V 30 ppm/ ℃ 20 usec 150 msec ISINK=3mA 0.4 ISOURCE=800uA 0.8Vcc V V Typical Performance Characteristics Vth vs. Temperature Temperature (℃) T-delay vs. Temperature Temperature (℃) VER 1.3 3 ACE809 3-Pin Microprocessor Reset Circuits Packing Information SOT-23-3 VER 1.3 4 ACE809 3-Pin Microprocessor Reset Circuits Notes ACE does not assume any responsibility for use as critical components in life support devices or systems without the express written approval of the president and general counsel of ACE Electronics Co., LTD. As sued herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and shoes failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. ACE Technology Co., LTD. http://www.ace-ele.com/ VER 1.3 5