IMP809, IMP810 ISO 9001 Registered POWER MANAGEMENT General Description Key Features The IMP809/IMP810 are 3.0V, 3.3V and 5.0V power supply supervisor circuits optimized for low-power microprocessor (µP), microcontroller (µC) and digital systems. The IMP809/810 are improved drop-in replacements for the Maxim MAX809/810 and feature 60% lower supply current. A reset signal is issued if the power supply voltage drops below a preset reset threshold and is asserted for at least 140ms after the supply has risen above the reset threshold. The IMP809 has an active-low RESET output that is guaranteed to be in the correct state for VCC down to 1.1V. The IMP810 has an active-high RESET output. The reset comparator is designed to ignore fast transients on VCC. Low supply current makes the IMP809/IMP810 ideal for use in portable and battery operated equipment. The IMP809/IMP810 are available in a compact 3-pin SOT23 package. Six voltage thresholds are available to support 3V to 5V systems: - Improved Maxim MAX809/MAX810 replacement —Lower supply current…6µA —80% lower maximum supply current - Monitor 5V, 3.3V and 3V supplies - 140ms min. reset pulse width - Active-low reset valid with 1.1V supply (IMP809) - Small 3-pin SOT-23 package - No external components - Specified over full temperature range — -40°C to 105°C Applications - Embedded controllers Reset Threshold Suffix Voltage (V) L M J T S R Z - Battery operated systems - Intelligent instruments 4.63 4.38 4.00 3.08 2.93 2.63 2.32 - Wireless communication systems - PDAs and handheld equipment Pin Assignments SOT23 GND IMP809 (IMP810) VCC ¯¯¯¯¯¯ (RESET)RESET Daily Silver IMP www.ds-imp.com.cn 1 IMP809, IMP810 ISO 9001 Registered POWER MANAGEMENT Pin Descriptions Pin Number 1 2 (IMP809) 2 (IMP810) 3 Name GND Function Ground RESET is asserted LOW if VCC falls below the reset threshold and remains LOW for the ¯¯¯¯¯¯ 240ms typical reset timeout period (140ms minimum) after VCC exceeds the threshold. RESET is asserted HIGH if VCC falls below the reset threshold and remains HIGH for the 240ms typical reset timeout period (140ms minimum) after VCC exceeds the threshold. Power supply input voltage (3.0V, 3.3V, 5.0V) RESET ¯¯¯¯¯¯ RESET VCC Absolute Maximum Ratings Pin Terminal Voltage with Respect to Ground VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3V to 6.0V RESET, RESET . . . . . . . . . . . . . . . . . . . . . . . . . –0.3V to (VCC + 0.3V) Input Current at VCC . . . . . . . . . . . . . . . . . . . 20mA Output Current: RESET, RESET . . . . . . . . . 20mA Rate of Rise at VCC . . . . . . . . . . . . . . . . . . . . 100V/µs Power Dissipation (TA= 70°C) . . . . . . . . . . 320mW (Derate 4mW/°C above 70°C) Operating Temperature Range . . . . . . . . . . –40°C to 105°C Storage Temperature Range . . . . . . . . . . . . . –65°C to 160°C Lead Temperature (soldering, 10 sec) . . . . . 300°C These are stress ratings only and functional operation is not implied. Exposure to absolute maximum ratings for prolonged time periods may affect device reliability. Block Diagram VCC VCC IMP809 (IMP810) ¯¯¯¯¯¯ RESET RESET VCC ¯¯¯¯¯¯ RESET Input GND Daily Silver IMP GND www.ds-imp.com.cn 2 IMP809, IMP810 ISO 9001 Registered POWER MANAGEMENT Electrical Characteristic Unless otherwise noted VCC is over the full voltage range, TA = –40°C to 105°C. Typical values at TA = 25°C, VCC = 5V for L/M/J devices, VCC = 3.3V for T/S devices and VCC = 3V for R devices. VCC=2.5V for Z devices Parameter Input Voltage (VCC) Range Supply Current Symbol VCC ICC Conditions Min TA = 0°C to 70°C TA = – 40°C to 105°C TA = – 40°C to 85°C TA = – 40°C to 85°C TA = 85°C to 105°C TA = 85°C to 105°C 1.1 1.2 L devices M devices J devices Reset Threshold VTH T devices S devices R devices Z devices Reset Threshold Stability VCC to Reset Delay Reset Active Timeout Period Low RESET Output Voltage (IMP809) VOL High RESET Output Voltage (IMP809) VOH Low RESET Output Voltage (IMP810) VOL High RESET Output Voltage (IMP810) VOH Daily Silver IMP Typ 5.5 5.5 15 10 25 20 4.70 4.75 4.86 4.45 4.50 4.56 4.06 4.10 4.20 3.11 3.15 3.23 VCC < 5.5V, L/M/J VCC < 3.6V, R/S/T/Z VCC < 5.5V, L/M/J VCC < 3.6V, R/S/T/Z TA = 25°C TA = – 40°C to 85°C TA = 85°C to 105°C TA = 25°C TA = – 40°C to 85°C TA = 85°C to 105°C TA = 25°C TA = – 40°C to 85°C TA = 85°C to 105°C TA = 25°C TA = – 40°C to 85°C TA = 85°C to 105°C 4.56 4.50 4.40 4.31 4.25 4.16 3.93 3.89 3.80 3.04 3.00 2.92 4.63 TA = 25°C TA = – 40°C to 85°C TA = 85°C to 105°C 2.89 2.85 2.78 2.93 2.96 3.00 3.08 TA TA TA TA TA TA 2.59 2.55 2.50 2.27 2.24 2.22 2.63 2.66 2.70 2.76 2.37 2.39 2.42 = 25°C = – 40°C to 85°C = 85°C to 105°C = 25°C = – 40°C to 85°C = 85°C to 105°C VCC = VTH to VTH - 100mV TA = – 40°C to 85°C TA = 85°C to 105°C VCC = VTH min., ISINK = 1.2mA, IMP809R/S/T/Z VCC = VTH min., ISINK = 3.2mA, IMP809L/M/J VCC > 1.1V, ISINK = 50µA 9 6 Ma 4.38 4.00 3.08 2.32 VCC > VTH max., ISOURCE = 500µA, IMP809R/S/T/Z 0.8VCC VCC > VTH max., ISOURCE = 800µA, IMP809L/M/J VCC -1.5 240 V µA V ppm/°C µs 30 20 140 100 Units 560 840 0.3 0.4 0.3 ms V V VCC = VTH max., ISINK = 1.2mA, IMP810R/S/T/Z VCC = VTH max., ISINK = 3.2mA, IMP810L/M/J 1.8V < VCC < VTH min., ISOURCE = 150µA www.ds-imp.com.cn 0.3 0.4 0.8VCC V V 3 ISO 9001 Registered IMP809, IMP810 POWER MANAGEMENT Typical Performance Characteristics Reset Timing The reset signal is asserted–LOW for the IMP809 and HIGH for the IMP810–when the VCC signal falls below the threshold trip voltage and remains asserted for 140ms minimum after the VCC has risen above the threshold. VCC 5V VTH Active Reset Timeout Period 0V 140ms minimum 5V ¯¯¯¯¯¯ RESET RESET IMP809 0V 5V IMP810 0V Figure 1. Reset Timing Diagram Negative VCC Transients The IMP809/810 protect µPs from brownouts and low VCC. Short duration transients of 100mV amplitude and 20µs or less duration typically do not cause a false RESET. Valid Reset with VCC under 1.1V To ensure logic inputs connected to the IMP809 RESET ¯¯¯¯¯¯ pin are in a known state when VCC is under 1.1V, a 100kΩ pull -down resistor at RESET ¯¯¯¯¯¯ is needed. The value is not critical. A pull-up resistor to VCC is needed with the IMP810. Daily Silver IMP www.ds-imp.com.cn 4 IMP809, IMP810 ISO 9001 Registered POWER MANAGEMENT Typical Performance Characteristics (Continued) VCC VCC 100kΩ IMP809 Power Supply Power Supply IMP810 ¯¯¯¯¯ RESET RESET 100kΩ GND GND Figure 2. ¯¯¯¯¯¯¯ RESET Valid with VCC Under 1.1V Figure 3. RESET Valid with VCC Under 1.1V Bi-directional Reset Pin Interfacing The IMP809/810 can interface with µP/µC bi-directional reset pins by connecting a 4.7kΩ resistor in series with the IMP809/810 reset output and the µP/µC bi-directional reset pin. BUF Buffered ¯¯¯¯¯¯ RESET VCC IMP809 µC or µP Power Supply 4.7kΩ ¯¯¯¯¯¯ RESET Input ¯¯¯¯¯¯ RESET GND GND Bi-directional I/O Pin (Example: 68HC11) Figure 4. Bi-directional Reset Pin Interfacing Daily Silver IMP www.ds-imp.com.cn 5 IMP809, IMP810 ISO 9001 Registered POWER MANAGEMENT Ordering Information Part Number 1 Reset Threshold (V) IMP809 Active LOW Reset IMP809LEUR-T 4.63 IMP809MEUR-T 4.38 IMP809JEUR-T 4.00 IMP809TEUR-T 3.08 IMP809SEUR-T 2.93 IMP809REUR-T 2.63 IMP809ZEUR-T 2.32 IMP810 Active HIGH Reset IMP810LEUR-T 4.63 IMP810MEUR-T 4.38 IMP810JEUR-T 4.00 IMP810TEUR-T 3.08 IMP810SEUR-T 2.93 IMP810REUR-T 2.63 IMP810ZEUR-T 2.32 Package Marking2 (XXX Lot Code) Temperature Range Pin-Package – 40°C to +105°C – 40°C to +105°C – 40°C to +105°C – 40°C to +105°C – 40°C to +105°C – 40°C to +105°C – 40°C to +105°C 3-SOT23 3-SOT23 3-SOT23 3-SOT23 3-SOT23 3-SOT23 3-SOT23 AAXXX ABXXX CWXXX ACXXX ADXXX AFXXX ZAXXX – 40°C to +105°C – 40°C to +105°C – 40°C to +105°C – 40°C to +105°C – 40°C to +105°C – 40°C to +105°C – 40°C to +105°C 3-SOT23 3-SOT23 3-SOT23 3-SOT23 3-SOT23 3-SOT23 3-SOT23 AGXXX AHXXX AIXXX AJXXX AKXXX ALXXX ZBXXX Notes: 1. Tape and Reel packaging is indicated by the -T designation. 2. Devices may also be marked with full part number: 809L, 810M etc. XXX refers to lot. Related Products Max. Supply Current Package Pins Manual RESET input Package Type Active-HIGH RESET output Active-LOW RESET output Daily Silver IMP IMP809 15µA 3 IMP810 15µA 3 SOT-23 SOT-23 ■ ■ IMP811 15µA 4 ■ SOT-143 IMP812 15µA 4 ■ SOT-143 ■ ■ www.ds-imp.com.cn 6 IMP809, IMP810 ISO 9001 Registered POWER MANAGEMENT Mechanical Dimensions Plastic SOT-23 (3-Pin) Symbol A A1 A2 b c D E E1 e e1 L L1 θ Daily Silver IMP Dimensions In Millimeters Min. Max. 0.900 1.150 0.000 0.100 0.900 1.050 0.300 0.500 0.080 0.150 2.800 3.000 1.200 1.400 2.250 2.550 1.030 0.900 1.800 2.000 0.600 0.550 0.300 0.500 0° 8° www.ds-imp.com.cn Dimensions In Inches Min. Max. 0.035 0.045 0.000 0.004 0.035 0.041 0.012 0.020 0.003 0.006 0.110 0.118 0.047 0.055 0.089 0.100 0.035 0.040 0.071 0.079 0.021 0.023 0.012 0.020 0° 8° 7 ISO 9001 Registered IMP809, IMP810 POWER MANAGEMENT ISO 9001 Registered Daily Silver IMP Microelectronics Co.,Ltd 7 keda Road ,Hi-Tech Park, NingBo,Zhejiang,P.R.C Post Code:315040 Tel:(086)-574-87906358 Fax:(086)-574-87908866 Email:[email protected] http://www.ds-imp.com.cn @2009 Daily Silver IMP Printed in china The IMP logo is a registered trademark of Daily Silver IMP. All other company and product names are trademarks of their respective owners Daily Silver IMP www.ds-imp.com.cn Revision: F Issue Date: 14th.Jun.09 Type: Product 8