IMP811SEUS/T

ISO 9001 Registered IMP811, IMP812 POWER MANAGEMENT Key Features General Description The IMP811/IMP812 are low-power supervisors designed to monitor voltage levels of 2.5V,3.0V, 3.3V and 5.0V power supplies in low-power microprocessor (µP), microcontroller (µC) and digital systems. Each fea-tures a debounced manual reset input. The IMP811/812 are improved drop-in replacements for the Maxim MAX811/812 with extended temperature specifications to 125°C. A reset signal is issued if the power supply voltage drops below a preset threshold and is asserted for at least 140ms after the supply has risen above the reset threshold. The IMP811 has an active-low output RESET that is guaranteed to be in the correct state for VCC down to 1.1V. The IMP812 has an activehigh output RESET. The reset comparator is designed to ignore fast transients on VCC. Low power consumption makes the IMP811/ IMP812 ideal for use in portable and batteryoperated equipment. Available in a compact 4-pin SOT143 package, the devices use minimal board space. Three voltage thresholds are available to support 2.5V to 5V systems: • Improved Maxim MAX811/MAX812 replacement —Specified to 125°C • 6µA supply current • Monitor 5V,3.3V,3V and 2.5V supplies • Manual reset input • 140ms min. reset pulse width • Guaranteed over temperature • Active-LOW reset valid with 1.1V supply (IMP811) • Small 4-pin SOT-143 package • No external components • Power-supply transient-immune design Applications - Computers and controllers Embedded controllers Battery operated systems Intelligent instruments Wireless communication systems PDAs and handheld equipment Block Diagram Reset Threshold Suffix Voltage (V) L 4.63 M 4.38 J 4.00 T 3.08 S 2.93 R 2.63 Z 2.32 VCC VCC IMP811 (IMP812) ¯¯¯¯¯¯ RESET ¯¯¯ MR RESET GND Daily Silver IMP www.ds-imp.com.cn VCC ¯¯¯¯¯¯ RESET Input GND 1 IMP811, IMP812 ISO 9001 Registered POWER MANAGEMENT Pin Assignments VCC GND SOT143 IMP811 (IMP812) ¯¯¯¯¯¯ (RESET) RESET ¯¯¯ MR Ordering Information Part Number 1 Reset Threshold (V) IMP811 Active LOW Reset IMP811LEUS/T 4.63 IMP811MEUS/T 4.38 IMP811JEUS/T 4.00 IMP811TEUS/T 3.08 IMP811SEUS/T 2.93 IMP811REUS/T 2.63 IMP811ZEUS/T 2.32 IMP812 Active HIGH Reset IMP812LEUS/T 4.63 IMP812MEUS/T 4.38 IMP812JEUS/T 4.00 IMP812TEUS/T 3.08 IMP812SEUS/T 2.93 IMP812REUS/T 2.63 IMP812ZEUS/T 2.32 Package Marking2 (XXX Lot Code) Temperature Range Pin-Package – 40°C to +125°C – 40°C to +125°C – 40°C to +125°C – 40°C to +125°C – 40°C to +125°C – 40°C to +125°C – 40°C to +125°C 4-SOT143 4-SOT143 4-SOT143 4-SOT143 4-SOT143 4-SOT143 4-SOT143 AMXXX ANXXX AOXXX APXXX AQXXX ARXXX ZCXXX – 40°C to +125°C – 40°C to +125°C – 40°C to +125°C – 40°C to +125°C – 40°C to +125°C – 40°C to +125°C – 40°C to +125°C 4-SOT143 4-SOT143 4-SOT143 4-SOT143 4-SOT143 4-SOT143 4-SOT143 ASXXX ATXXX AUXXX AVXXX AWXXX AXXXX ZDXXX Notes: 1. Tape and Reel packaging is indicated by the /T designation. 2. Devices may also be marked with full part number: 811L, 812M etc. XXX refers to lot. Absolute Maximum Ratings Pin Terminal Voltage with Respect to Ground VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3V to 6.0V ¯¯¯¯¯¯ and ¯¯¯ RESET, RESET MR . . . . . –0.3V to (VCC + 0.3V) Operating Temperature Range . . . . . . . –40°C to 125°C ¯¯¯ . . . . . .. . . . . . . . 20mA Input Current at VCC and MR Output Current: RESET or ¯¯¯¯¯¯ RESET . . . . . . . . . 20mA Lead Temperature (soldering, 10 sec) . . . . . 300°C Storage Temperature Range . . . . . . . . –65°C to 160°C Rate of Rise at VCC . . . . . . . . . . . . . . . . .. . 100V/µs Power Dissipation (TA= 70°C) . . . . . . . . . . 320mW (Derate SOT-143 4mW/°C above 70°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. Daily Silver IMP www.ds-imp.com.cn 2 IMP811, IMP812 ISO 9001 Registered POWER MANAGEMENT Electrical Characteristic Unless otherwise noted VCC is over the full voltage range, TA = –40°C to 125°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 Symbol VCC Input Voltage (VCC) Range ICC Supply Current Conditions Min TA = 0°C to 70°C TA = – 40°C to 125°C TA = – 40°C to 85°C TA = – 40°C to 85°C TA = 85°C to 125°C TA = 85°C to 125°C 1.1 1.2 L devices M devices J devices VTH Reset Threshold T devices S devices R devices Z devices Reset Threshold Temp. Coefficient VCC VCC VCC VCC TA TA TA TA TA TA TA TA TA TA TA TA TA TA TA TA TA TA TA TA TA < 5.5V, L/M/J < 3.6V, R/S/T/Z < 5.5V, L/M/J < 3.6V, R/S/T/Z = 25°C = – 40°C to 85°C = – 40°C to 125°C = 25°C = – 40°C to 85°C = – 40°C to 125°C = 25°C = – 40°C to 85°C = – 40°C to 125°C = 25°C = – 40°C to 85°C = – 40°C to 125°C = 25°C = – 40°C to 85°C = – 40°C to 125°C = 25°C = – 40°C to 85°C = – 40°C to 125°C = 25°C = – 40°C to 85°C = – 40°C to 125°C VCC to Reset Delay Reset Active Timeout Period TA = – 40°C to 85°C TA = 85°C to 125°C MR Minimum Pulse Width ¯¯¯ ¯¯¯ MR Glitch Immunity tMR ¯¯¯ MR to RESET Propagation Delay tMD VIH ¯¯¯ MR Input Threshold VIL VIH VIL 4.54 4.50 4.40 4.30 4.25 4.16 3.92 3.89 3.80 3.03 3.00 2.92 2.88 2.85 2.78 2.58 2.55 2.50 2.27 2.24 2.22 4.63 4.38 4.00 3.08 2.93 2.63 2.32 Ma 5.5 5.5 15 10 25 20 4.72 4.75 4.86 4.46 4.50 4.56 4.07 4.10 4.20 3.14 3.15 3.23 2.98 3.00 3.08 2.68 3.70 2.76 2.37 2.39 2.42 30 40 20 140 100 240 Units V µA V ppm/°C µs 560 840 10 ms us Note 3 100 ns Note 2 0.5 us 2.3 VCC >VTH(MAX),IMP811/812L/M/J 0.8 V VCC >VTH(MAX),IMP811/812R/S/T/Z ¯¯¯ MR Pull-up Resistance Daily Silver IMP 6 5 TCVTH VCC = VTH to (VTH - 125mV),L/M/J devices VCC = VTH to (VTH - 125mV),R/S/T/Z devices Typ 0.7VCC 0.25VCC 10 www.ds-imp.com.cn 20 30 KΩ 3 IMP811, IMP812 ISO 9001 Registered POWER MANAGEMENT Electrical Characteristic Unless otherwise noted VCC is over the full voltage range, TA = –40°C to 125°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 Low RESET Output Voltage (IMP811) VOL High RESET Output Voltage (IMP811) VOH Low RESET Output Voltage (IMP812) VOL High RESET Output Voltage (IMP812) VOH VCC = VTH min., ISINK = 1.2mA, IMP811R/S/T/Z VCC = VTH min., ISINK = 3.2mA, IMP811L/M/J VCC > 1.1V, ISINK = 50µA 0.3 0.4 0.3 VCC > VTH max., ISOURCE = 500µA, IMP811R/S/T/Z VCC > VTH max., ISOURCE = 800µA, IMP811L/M/J VCC = VTH max., ISINK = 1.2mA, IMP812R/S/T/Z 0.8VCC VCC -1.5 V 0.3 0.4 VCC = VTH max., ISINK = 3.2mA, IMP812L/M/J 1.8V < VCC < VTH min., ISOURCE = 150µA V 0.8VCC V V Notes: 1. Production testing done at TA = 25°C. Over temperature specifications guaranteed by design only using six sigma design limits. 2. RESET output is active LOW for the IMP811 and RESET output is active HIGH for the IMP812. 3. Glitches of 100ns or less typically will not generate a reset pulse. Pin Descriptions Pin Number Name Function 1 GND Ground 2 (IMP811) ¯¯¯¯¯¯ RESET ¯¯¯¯¯¯ is asserted LOW if VCC falls below the reset threshold and remains LOW RESET for the 240ms typical reset timeout period (140ms minimum) after VCC exceeds the threshold. 2 (IMP812) RESET 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. 3 4 ¯¯¯ MR VCC Manual Reset Input. A logic LOW on ¯¯¯ MR asserts RESET. RESET remains active ¯¯¯ returns HIGH. The active low in¯¯¯ as long as MR is LOW and for 180ms after MR put has an internal 20kΩ pull-up resistor. The input should be left open if not used. It can be driven by TTL or CMOS logic or shorted to ground by a switch.. Power supply input voltage (2.5V,3.0V,3.3V,5V) 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 4 IMP811, IMP812 ISO 9001 Registered POWER MANAGEMENT Typical Performance Characteristics ¯¯¯ Reset Timing and Manual Reset (MR) The reset signal is asserted–LOW for the IMP811 and HIGH for the IMP812 – when the VCC signal falls below the threshold trip voltage and remains asserted for 140ms minimum after the VCC has risen above the threshold. Alogic low on ¯¯¯ MR asserts RESET LOW on the IMP811 and HIGH on the IMP812. ¯¯¯ MR is internally pulled high through a 20kΩ resistor and can be driven by TTL/CMOS gates or with open collector/drain outputs. ¯¯¯ can be left open if not used. MR ¯¯¯ MR may be connected to a normally-open switch connected to ground without an external debounce circuit. For added noise rejection, a 0.1μF capacitor from ¯¯¯ MR to Ground can be added. VCC 5V VTH Active Reset Timeout Period 0V 140ms minimum ¯¯¯ MR 5V 0V ¯¯¯¯¯¯ RESET Active Reset Timeout Period 5V IMP811 0V RESET 5V IMP812 0V Figure 1. Reset Timing Diagram RESET Output Operation In μP/μC systems it is important to have the processor begin operation from a known state or be able to return the system to a known state. A RESET output to a processor is provided to prevent improper operation during power supply sequencing or low voltage – brownout – conditions. The IMP811/812 are designed to monitor the system power supply voltages and issue a RESET signal when levels are out of range. RESET outputs are guaranteed to be active for VCC above 1.1V. When VCC exceeds the reset threshold, an internal timer keeps RESET active for the reset timeout period, after which RESET becomes inactive (HIGH for the IMP811 and LOW for the IMP812). Daily Silver IMP www.ds-imp.com.cn 5 IMP811, IMP812 ISO 9001 Registered POWER MANAGEMENT Typical Performance Characteristics Valid Reset with VCC under 1.1V To ensure that logic inputs connected to the IMP811 ¯¯¯¯¯¯ 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 similar pull-up resistor to VCC is needed with the IMP812. If VCC drops below the reset threshold, ¯¯¯¯¯¯ RESET automatically becomes active. Alternatively, external ¯¯¯ pin. There is an circuitry or a human operator can initiate this condition using the Manual Reset (MR) internal pullup on ¯¯¯ MR so it can be left open if it is not used. ¯¯¯ MR can be driven by TTL/CMOS logic or even an external switch, since it is already debounced. If the switch is at the end of a long cable, it might require a bypass (100nF) at the pin if noise pickup is a problem. Eight voltage thresholds are available to support 2.5V and 5V systems: Reset Threshold Suffix Voltage (V) L 4.63 M 4.38 J 4.00 T 3.08 S 2.93 R 2.63 Z 2.32 VCC VCC 100kΩ Power Supply Power Supply IMP811 ¯¯¯ MR ¯¯¯ MR ¯¯¯¯¯¯ RESET 100kΩ GND Figure 2. ¯¯¯¯¯¯ RESET Valid with VCC Under 1.1V Daily Silver IMP IMP812 RESET GND Figure 3. RESET Valid with VCC Under 1.1V www.ds-imp.com.cn 6 IMP811, IMP812 ISO 9001 Registered POWER MANAGEMENT Typical Performance Characteristics (Continued) Negative VCC Transients Typically short duration transients of 100mV amplitude and 20μs duration do not cause a false RESET. A 0.1μF capacitor at VCC increases transient immunity. Bi-directional Reset Pin Interfacing The IMP811/812 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 IMP811 µC or µP Power Supply 4.7kΩ ¯¯¯ MR ¯¯¯¯¯¯ RESET ¯¯¯¯¯¯ RESET Input GND GND Bi-directional I/O Pin (Example: 68HC11) Figure 4. Bi-directional Reset Pin Interfacing Daily Silver IMP www.ds-imp.com.cn 7 IMP811, IMP812 ISO 9001 Registered POWER MANAGEMENT Mechanical Dimensions Plastic SOT-143 (4-Pin) Inches Symbol A A1 A2 b c D d E E1 e e1 L L1 θ Daily Silver IMP Millimeters Max Min Max Min 0.035 0.000 0.035 0.012 0.003 0.110 0.008 TYP. 0.047 0.089 0.045 0.004 0.041 0.020 0.006 0.118 0.900 1.150 0.000 0.100 0.900 1.050 0.300 0.500 0.080 0.150 2.800 3.000 0.200 YYP. 1.200 1.400 2.250 2.550 0.950 TYP 1.800 2.000 0.550 REF 0.300 0.500 0° 8° 0.071 0.012 0° 0.055 0.100 0.037 TYP 0.079 0.022 REF 0.020 8° www.ds-imp.com.cn 8 ISO 9001 Registered IMP811, IMP812 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:sales@ds-imp.com.cn http://www.ds-imp.com.cn @2015 Daily Silver IMP Printed in china Revision: F Issue Date: 28th.Aug.15 Type: Product 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 9