Kingbor Technology Co.,Ltd KB862 TEL:(86)0755-83095458 FAX:(86)0755-88364052 Microprocessor Reset circuits General Description Features This system reset IC, developed using the CMOS process, has a built-in delay function. Super low consumption current of 1.0 µ A typ. has been achieved through use of the CMOS process. Also, detection voltage is high precision detection of 2%. • • • • • • • Applications • • • • • Monitoring processor, ASIC, or FPGA core and I/O voltages • PDAs, hand-held PCs • Embedded controllers • Telecommunications systems • Power supplies • Wireless / Cellular systems • Networking hardware Under-voltage monitor Super low consumption current(1.0uA typ) High precision detection voltage(2%) Operating range(0.7 - 10V) Wide operating temperature range(-30 to +85 °C) Power-on reset generation (150ms Typ) Choice of threshold voltages (contact Kingbor regarding availability) Active-low reset output Rejects brief input transients Industry standard package and pinout 4-pin SC-82AB package Ordering Information Part Number KB862-280 Marking 6K Typical Application Voltage* Nominal Threshold Voltage 3.3V ±5% 2.8V 150 Typical Application KB862 /MR C1 /RESET Junction Temperature Range Package –30°C to +85°C SC-82AB Block Diagrams VDD VDD VDD TRST (ms) /RESET VDD µP /RESET 0.22uF GND /MR Typical Operating Circuit March 2007 1 KB862 Kingbor Technology Co.,Ltd KB862 TEL:(86)0755-83095458 FAX:(86)0755-88364052 Pin Configuration /MR 3 /RESET 4 6K KB862 1 2 GND VDD SC-82AB (TOP VIEW) Pin Description Pin Number Pin Name Pin Function 1 GND 4 /RESET 2 V DD Analog Input. Power supply input to the IC. 3 /MR Manual Reset Input. A logic low on /MR asserts reset. Ground return for all IC functions. Digital Output. Active-low. Asserted whenever VCC falls below the threshold voltage. It will remain asserted for no less than 150ms and be de-asserted after VDD returns above the threshold. 2 March 2007 Kingbor Technology Co.,Ltd KB862 TEL:(86)0755-83095458 FAX:(86)0755-88364052 Absolute Maximum Ratings (Note 1) Operating Ratings (Note 2) Terminal Voltage (VCC) ................................. –0.3V to 10V Lead Temperature (soldering, 10 sec.) ..................... 260°C Storage Temperature (TS) ......................... –40°C to 125°C Rate of Rise (VCC) ................................................. 100V/µs ESD Rating, Note 3 Ambient Temperature (TA) ......................... –30°C to +85°C Power Dissipation (TA = +70°C) .............................. 320mW Electrical Characteristics TA = 25°C; VCC = 3.3V for KB809 unless otherwise noted. Values in bold are for –40 °C to +85 °C; unless otherwise noted Symbol Parameter Condition Min VCC Operating Voltage Range TA = 0°C to 70°C TA = –30°C to 85°C Typ Max Units 0.65 8 V 0.70 8 V 1 4 µA ICC Supply Current VCC = 3.3V VTH Reset Voltage Threshold S Voltage Options (KB862-280) 2.74 2.80 2.86 V RD Delay circuit resistance TA = –30°C to 85 °C 0.5 1.0 2.0 MΩ VHYST Typical hysteresis TRST Reset Timeout Period MR=0.22uF TPROP Propogation delay /RESET < VOL, 100mV Overdrive VOH /RESET Output Voltage High ISOURCE = 500µA VOL /RESET Output Voltage Low VCC = VTH min., ISINK = 1.2mA 0.3 V VCC > 1.4V, ISINK = 50µA, TA = 0°C to +70°C 0.3 V VCC > 1.6V, ISINK = 50µA, TA = –30° to +85°C 0.3 V 5 50 Exceeding the absolute maximum rating may damage the device. The device is not guaranteed to function outside its operating rating. Note 3. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF. Timing Diagrams VTH TRST TRST RESET Reset Timing Diagram March 2007 3 ms µs 0.8·VCC Note 2. VTH 500 9.3 Note 1. VCC 150 mV V Kingbor Technology Co.,Ltd KB862 TEL:(86)0755-83095458 FAX:(86)0755-88364052 Timing Chart Detect voltage (+VDET) Supply Voltage /MR Terminal Threshold voltage GND RESET Voltage GND Delay time (tD) Delay Time (tD) . . 0.69 tD = RD RD: /MR Pin Resistance C (F) (s) V C : /MR Pin Capacitor VHYS -VDET VDD +VDET t V RESET Voltage tD tD t 4 March 2007 Kingbor Technology Co.,Ltd KB862 TEL:(86)0755-83095458 FAX:(86)0755-88364052 Characteristics (For products with KB862 detection voltage 2.8V typ. Output voltage Consumption current Consumption Current (µA) Output Voltage (V) 3.0 2.5 2.0 1.5 1.0 0.5 0 1 1.5 2 2.5 3 2.5 2 1.5 1 0.5 0 0 3 2 Input Voltage (V) 3.0 2.0 1.0 0.0 1.5 2 2.5 10 1 0.1 0.0001 3 0.001 Hysteresis Voltage (mV) Detecting Voltage (V) 2.90 2.80 2.70 40 60 1 200 180 160 140 120 100 80 -40 -20 80 100 Temperature (°C) 0 20 40 60 Temperature (°C) Note: These are typical characteristics. March 2007 0.1 Hysteresis voltage vs temperature 3.00 20 0.01 MR ( µF) Detecting voltage vs temperature 0 10 100 Input Voltage (V) 2.60 -40 -20 8 1000 Delay Time ( ms) MR Pin Output Current (mA) VDS=0.5V 1 6 Delay time vs MR 4.0 0.5 4 Input Voltage (V) MR pin output current 0 CMOS output) 5 80 100 Kingbor Technology Co.,Ltd KB862 TEL:(86)0755-83095458 FAX:(86)0755-88364052 PACAGE DESCRIPTION 0.9±0.1 (0.7) 0.3±0.1 2.1±0.3 3 +0.2 1.25 –0.1 4 0.3±0.2 2±0.2 1.3±0.2 0 to 0.1 2 0.16 0.3±0.1 0.4±0.1 +0.1 –0.06 0.05 SC-82AB PACKAGE DIMENSIONS Kingbor Technology TEL:(86) 0755-83095458 FAX: (86) 0755-88364052 www.kingbor.com 6 March 2007