UTC812

UNISONIC TECHNOLOGIES CO., LTD UTC812 MICROPROCESSOR RESET IC DESCRIPTION The UTC UTC812 is a microprocessor (µP) reset circuit designed to monitor the power supplies in µP and digital systems. The UTC UTC812 has push-pull output and active-low RESET output. This device provides customers with perfect system reliability and low cost which are achieved by to no external component requirement and adjustments when used with +5V, +3.3V, +3.0Vpowered circuits. This circuit performs a single function: it asserts a reset signal whenever the VCC supply voltage declines below a preset threshold, keeping it asserted for at least 140ms after VCC has risen above the reset threshold. Reset thresholds suitable for operation with a variety of supply voltages are available. The reset comparator can be used to ignore fast transients on VCC, and outputs are guaranteed to be in the correct logic state for VCC down to 1V. In applications, the UTC812 is suitable for computers, controllers, intelligent instruments, critical microprocessors, microcomputer power monitoring, portable, or battery-powered equipments and automotive device. CMOS IC FEATURES * Supply Current: 10µA * Precision Monitoring of +5V, +3.3V, +3.0V Powered Circuits * With the Two Configurations In The Following: Push-Pull RESET Output * Power-On Reset Pulse Width: 140ms (MIN.) * Outputs Guaranteed To Be In The Correct Logic State for VCC Down to 1V. * Required No External Components * Power Supply Transient Immunity ORDERING INFORMATION Ordering Number UTC812G-X-AE2-R UTC812G-X-AE2-R (1)Packing Type (2)Package Type (3)Output Voltage Code (4)Halogen Free (1) R: Tape Reel (2) AE2: SOT-23-3 (3) Refer to Marking Information (4) G: Halogen Free Package SOT-23-3 Packing Tape Reel www.unisonic.com.tw Copyright © 2010 Unisonic Technologies Co., Ltd 1 of 5 Ver.A UTC812 MARKING INFORMATION PACKAGE VOLTAGE CODE 3 SOT-23-3 C : 3.08 V 812 G 2 1 MARKING CMOS IC Voltage Code PIN CONFIGURATION VCC 3 2 RESET 1 GND PIN DESCRIPTION PIN NO. 1 2 3 PIN NAME GND 123 RESET VCC DESCRIPTION IC Ground Pin RESET goes low if Vcc falls below the reset threshold and remains asserted for one reset timeout period after Vcc exceeds the reset threshold. Power Supply Input UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 5 Ver.A UTC812 BLOCK DIAGRAM CMOS IC VCC + VREF Delay Circuit RESET GND UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 5 Ver.A UTC812 ABSOLUTE MAXIMUM RATING CMOS IC PARAMETER SYMBOL RATINGS UNIT Terminal Voltage (with respect to GND) VCC -0.3~6.0 V RESET, RESET (push-pull) -0.3~(VCC+0.3) V Input Current VCC 20 mA Output Current, RESET, RESET 20 mA Junction Temperature TJ 150 °C Operating Temperature TOPR -40~105 °C Storage Temperature TSTG -65~150 °C Notes: Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. THERMAL DATA PARAMETER Junction to Ambient SYMBOL θJA RATINGS 420 TYP 10 3.08 40 7 MAX 5.5 23 3.12 UNIT °C/W UNIT V μA V ppm/°C μs ms mA ELECTRICAL CHARACTERISTICS (Note 1) (TA = 25℃, VCC= 3.3V, unless otherwise specified.) PARAMETER SYMBOL TEST CONDITIONS MIN VCC Range 1.0 Supply Current ICC VCC