POWER MANAGEMENT Supervisors IMP1810 — Lo w Po w er, 5V µ P R eset Active LOW, Push-Pull Output IMP1811 — Lo w Po w er, 5V µ P R eset Active LOW, Open-Drain Output IMP181 2 — Lo w Po w er, 5V µ P R eset Active HIGH, Push-Pull Output IMP1815 — Lo w Po w er, 3.3V/3.0V µ P R eset Active LOW, Push-Pull Output IMP1816 — Lo w Po w er, 3.3V/3.0V µ P R eset Active LOW, Open-Drain Output IMP1817 — Lo w Po w er, 3.3V/3.0V µ P R eset Active HIGH, Push-Pull Output IMP1 233D — Lo w Po w er, 5V µ P R eset Active LOW, Open-Drain Output IMP1 233M — Lo w Po w er, 5V/3.0V µ P R eset Active LOW, Open-Drain Output 408-432-9100/www.impweb.com The part numbers and descriptions are linked to the data sheet. µ P Super visor Cr oss R ef er ence µP Supervisor Products: Low Power Alternatives to Dallas Semiconductor IMP Ordering Part Number RESET Voltage (V) RESET Tolerance (%) RESET Time (ms) RESET Polarity Push-Pull Output Stage Open Drain Output 8-Pin SO Package TO-92 Package SOT-23 Package IMP1810-5 4.620 5 150 LOW X X IMP1810-10 4.370 10 150 LOW X X IMP1810-15 4.120 15 150 LOW X X IMP1810R-5 4.620 5 150 LOW X X IMP1810R-10 4.370 10 150 LOW X X IMP1810R-15 4.120 15 150 LOW X IMP1811-5 4.620 5 15 0 LOW X X IMP1811-10 4.350 10 150 LOW X X IMP1811-15 4.130 15 150 LOW X X IMP1811R-5 4.620 5 15 0 LOW X X IMP1811R-10 4.350 10 150 LOW X X IMP1811R-15 4.130 15 150 LOW X IMP1812-5 4.620 5 150 HIGH X X IMP1812-10 4.350 10 150 HIGH X X IMP1812-15 4.130 15 150 HIGH X X IMP1812R-5 4.620 5 150 HIGH X X IMP1812R-10 4.350 10 150 HIGH X X IMP1812R-15 4.130 15 150 HIGH X IMP1815-5 3.060 5 15 0 LOW X X IMP1815-10 2.880 10 150 LOW X X IMP1815-20 2.550 20 150 LOW X X IMP1815R-5 3.060 5 15 0 LOW X X IMP1815R-10 2.880 10 150 LOW X X IMP1815R-20 2.550 20 150 LOW X IMP1816-5 3.060 5 150 LOW X X IMP1816-10 2.880 10 150 LOW X X IMP1816-20 2.550 20 150 LOW X X IMP1816R-5 3.060 5 150 LOW X X IMP1816R-10 2.880 10 150 LOW X X IMP1816R-20 2.550 20 150 LOW X IMP1817-5 3.060 5 15 0 HIGH X X IMP1817-10 2.880 10 150 HIGH X X IMP1817-20 2.550 20 150 HIGH X X IMP1817R-5 3.060 5 15 0 HIGH X X IMP1817R-10 2.880 10 150 HIGH X X X SOT-223 Package X X X X X IMP1817R-20 2.550 20 150 HIGH IMP1233D-5 4.625 5 35 0 LOW X X X IMP1233D-10 4.375 10 350 LOW X X IMP1233D-15 4.125 15 350 LOW X X IMP1233DZ-5 4.625 5 35 0 LOW X X IMP1233DZ-10 4.375 10 350 LOW X X IMP1233DZ-15 4.125 15 350 LOW X IMP1233M-55 4.625 5 350 LOW X X X IMP1233M-5 4.375 10 350 LOW X X IMP1233M-3 2.720 15 350 LOW X X IMP1233MS-55 4.625 5 350 LOW X X IMP1233MS-5 4.375 10 350 LOW X X IMP1233MS-3 2.720 15 350 LOW X X ELD/B_t07 408-432-9100/www.impweb.com © 1999 IMP, Inc. IMP18 1 0 POWER MANAGEMENT Low Power, 5V µP Reset Key Features – Active LOW, Push-Pull Output The IMP1810 supply voltage monitor is an improved, low-power replacement for the Dallas Semiconductor DS1810. Maximum supply current over temperature is a low 20µA, representing 50 percent lower power as compared to the DS1810. The IMP1810 issues an active LOW reset signal whenever the monitored supply is out-of-tolerance. A precision reference and comparator circuit monitor power supply (VCC) level. Tolerance level options are 5-, 10- and 15-percent. When an out-of-tolerance condition is detected, an internal power-fail signal is generated which forces an active LOW reset signal. After VCC returns to an in-tolerance condition, the reset signal remains active for 150ms to allow the power supply and system microprocessor to stabilize. The IMP1810 is designed with a push-pull output stage and operates over the extended industrial temperature range. Devices are available in compact surface mount SOT-23 packages and 3-lead TO-92 packages. Other low power products in this family include the IMP1811/12/15/16/17, IMP1233D and IMP1233M. ◆ Improved Dallas DS1810 replacement — 50% lower maximum supply current ◆ Low Supply Current — 20µA maximum (5.5V) ◆ Automatically restarts a microprocessor after power failure ◆ 150ms reset delay after VCC returns to an in-tolerance condition ◆ Active LOW power-up reset ◆ Precision temperature-compensated voltage reference and comparator ◆ Eliminates external components ◆ Low-cost TO-92 package ◆ Compact surface mount SOT-23 package ◆ Push-Pull output for minimum current drain ◆ Operating temperature – 40°C to +85°C Family Selection Guide Applications RESET Voltage RESET Time (V) (ms) Part IMP1810 IMP1811 IMP1812 IMP1815 IMP1816 IMP1817 IMP1233D IMP1233M 4.620, 4.370, 4.120 4.620, 4.350, 4.130 4.620, 4.350, 4.130 3.060, 2.880, 2.550 3.060, 2.880, 2.550 3.060, 2.880, 2.550 4.625, 4.375, 4.125 4.625, 4.375, 2.720 150 150 150 150 150 150 350 350 Output Stage RESET Polarity Push-Pull Open-Drain Push-Pull Push-Pull Open-Drain Push-Pull Open-Drain Open-Drain LOW LOW HIGH LOW LOW HIGH LOW LOW ◆ ◆ ◆ ◆ ◆ ◆ ◆ Set-top boxes Cellular phones PDAs Energy management systems Embedded control systems Printers Single board computers Block Diagram Typical Application VCC 1 VCC Supply Tolerance Bias IMP1810 IMP1810 + – Microprocessor 2 Delay 150ms Typical RESET Reference RESET RESET GND 3 GND © 1999 IMP, Inc. 1810_01.eps 408-432-9100/www.impweb.com 1810_02.eps 1 IMP18 1 0 Pin Configuration SOT23 RESET TO-92* 1 IMP1810-X IMP1810-X 3 VCC GND 2 1 2 3 1810_03.eps 1810_04.eps Pin Descriptions Pin Number Name Function 1 RESET Active LOW reset output 2 VCC Power supply input 3 GND Ground Package Marking Code 3 SOT-23 Package Letter Code A B Part Reset Tolerance B B B A B C IMP1810 IMP1810 IMP1810 5% 10% 15% A B C 1 D 2 1810_t02.eps 1810_05a.eps Ordering Information Device Summary Part** Number Package Marking RESET RESET RESET Push-Pull Output -92* SOT-23 rance Time Output PTaOck Voltage Tole(% age Package ) (ms) Stage (V) IMP1810-5 4.62 5 150 l l LOW IMP1810-10 4.37 10 150 l l LOW l A B C D IMP1810-15 4.12 15 150 l IMP1810R-5 4.62 5 150 l l LOW B A X X IMP1810R-10 4.37 10 150 l l LOW B B X X IMP1810R-15 4.12 15 150 l l LOW B C X X * Add /S to Part Number for straight (unformed) leads. (ie. IMP18xx-x/S) ** Add /T to Part Number for Tape and Reel. (ie. IMP18xx-x/T) 2 RESET Polarity 408-432-9100/www.impweb.com LOW XX = Date code © 1999 IMP, Inc. IMP18 10 Absolute Maximum Ratings Voltage on VCC . . . . . . . . . . . . . . . . . . . . . . . . –0.5V to 7V Voltage on RESET . . . . . . . . . . . . . . . . . . . . . –0.5V to VCC + 0.5V Operating Temperature Range . . . . . . . . . . . –40°C to 85°C Soldering Temperature . . . . . . . . . . . . . . . . . . 260°C for 10 seconds Storage Temperature . . . . . . . . . . . . . . . . . . . –55°C to 125°C Voltages measured with respect to ground. These are stress ratings only and functional operation is not implied. Electrical Characteristics Unless otherwise noted, VCC = 1.2V to 5.5V and specifications are over the operating temperature range of – 40°C to +85°C. All voltages are referenced to ground. Parameter Symbol Conditions Supply Voltage VCC Output Voltage VOH IOUT < 500µA Output Current IOH Output = 2.4V, VCC ≥ 2.7V Output Current IOL Output = 0.4V, VCC ≥ 2.7V Operating Current ICC VCC < 5.5V, RESET output open Min Typ 1.2 VCC – 0.5V Max Units 5.5 V VCC – 0.1V V 350 µA +10 mA 8 20 µA VCC Trip Point (IMP1810-5) VCCTP 4.50 4.62 4.75 V VCC Trip Point (IMP1810-10) VCCTP 4.25 4.37 4.49 V VCC Trip Point (IMP1810-15) VCCTP 4.00 4.12 4.24 V Output Capacitance C OUT 10 pF VCC Detect to RESET Low t RPD 5 µs 2 VCC Slew Rate (VCCTP (MAX) to VCCTP (MIN)) tF 300 µs VCC Slew Rate (VCCTP (MIN) to VCCTP (MAX)) tR 0 ns VCC Detect to RESET High t RPU t r = 5µs 100 150 300 ms Notes 1. The tF value is for reference in defining values for tRPD and should not be considered a requirement for proper operation or use. © 1999 IMP, Inc. 408-432-9100/www.impweb.com 3 IMP18 1 0 Application Information Operation – Power Monitor Output Conditions The DS1810 detects out-of-tolerance power supply conditions. It resets a processor during power-up, power-down and issues a reset to the system processor when the monitored power supply voltage is below the reset threshold. When an out-of-tolerance VCC voltage is detected, the RESET signal is asserted. On power-up, RESET is kept active (LOW) for approximately 150ms after the power supply voltage has reached the selected tolerance. This allows the power supply and microprocessor to stabilize before RESET is released. The IMP1810 active LOW reset signal is valid as long as VCC remains above 1.2V. The RESET output on the IMP1810 uses a push-pull drive stage that can maintain a valid output below 1.2V. To sink current with VCC below 1.2V, a resistor can be connected from the reset pin (RESET) to Ground (see Figure 1). This configuration will give a valid value on the RESET output with VCC approaching 0V. During both power up and down, this configuration will draw current when RESET is in the high state. A value of 100kΩ should be adequate to maintain a valid condition. tR VCCTP (MAX) VCCTP VCCTP (MIN) IMP1810 Microprocessor RESET VCC tRPU RESET VOH 100k RESET 1810_06.eps 1810_07.eps Figure 2. Timing Diagram: Power-Up Figure 1. RESET Valid to 0V VCC tF VCC VCCTP (MAX) VCCTP VCCTP (MIN) tRPD RESET VOL 1810_08.eps Figure 3. Timing Diagram: Power-Down 4 408-432-9100/www.impweb.com © 1999 IMP, Inc. IMP18 1 1 POWER MANAGEMENT Low Power, 5V µP Reset Key Features – Active LOW, Open-Drain Output The IMP1811 supply voltage monitor is an improved, low-power replacement for the Dallas Semiconductor DS1811. Maximum supply current over temperature is a low 20µA, representing 50 percent lower power as compared to the DS1811. The IMP1811 issues an active LOW reset signal whenever the monitored supply is out-of-tolerance. A precision reference and comparator circuit monitor power supply (VCC) level. Tolerance level options are 5-, 10- and 15-percent. When an out-of-tolerance condition is detected, an internal power-fail signal is generated which forces an active LOW reset signal. After VCC returns to an in-tolerance condition, the reset signal remains active for 150ms to allow the power supply and system microprocessor to stabilize. The IMP1811 is designed with a open-drain output stage and operates over the extended industrial temperature range. Devices are available in compact surface mount SOT-23 packages and 3-lead TO-92 packages. Other low power products in this family include the IMP1810/12/15/16/17, IMP1233D and IMP1233M. ◆ Improved Dallas DS1811 replacement — 50% lower maximum supply current ◆ Low Supply Current — 20µA maximum (5.5V) ◆ Automatically restarts a microprocessor after power failure ◆ 150ms reset delay after VCC returns to an in-tolerance condition ◆ Active LOW power-up reset ◆ Precision temperature-compensated voltage reference and comparator ◆ Eliminates external components ◆ Low-cost TO-92 package ◆ Compact surface mount SOT-23 package ◆ Operating temperature – 40°C to +85°C Applications Family Selection Guide RESET Voltage RESET Time (V) (ms) Part IMP1810 IMP1811 IMP1812 IMP1815 IMP1816 IMP1817 IMP1233D IMP1233M 4.620, 4.370, 4.120 4.620, 4.350, 4.130 4.620, 4.350, 4.130 3.060, 2.880, 2.550 3.060, 2.880, 2.550 3.060, 2.880, 2.550 4.625, 4.375, 4.125 4.625, 4.375, 2.720 150 150 150 150 150 150 350 350 Output Stage RESET Polarity Push-Pull Open-Drain Push-Pull Push-Pull Open-Drain Push-Pull Open-Drain Open-Drain LOW LOW HIGH LOW LOW HIGH LOW LOW ◆ ◆ ◆ ◆ ◆ ◆ ◆ Set-top boxes Cellular phones PDAs Energy management systems Embedded control systems Printers Single board computers Block Diagram Typical Application VCC 1 VCC Supply Tolerance Bias IMP1811 5.5kΩ 2 + – IMP1811 RESET Delay 150ms Typical Microprocessor RESET RESET GND Reference 3 GND © 1999 IMP, Inc. 1811_02.eps 1811_01.eps 408-432-9100/www.impweb.com 1 IMP18 1 1 Pin Configuration SOT23 RESET TO-92* 1 IMP1811-X IMP1811-X 3 VCC GND 2 1 1811_03.eps 2 3 1811_04.eps Pin Descriptions Pin Number Name Function 1 RESET Active LOW reset output 2 VCC Power supply input 3 GND Ground Package Marking Code 3 SOT-23 Package Letter Code A B Part Reset Tolerance C C C A B C IMP1811 IMP1811 IMP1811 5% 10% 15% A B C 1 D 2 1811_t02.eps 1811_05a.eps Ordering Information Device Summary RESET ESET RESET Part*** Output TR o l erance Time Number Voltage (%) (ms) (V) Package Marking Open-Drain** TO-92* SOT-23 RESET Output Package Package Polarity Stage IMP1811-5 4.62 5 150 l l LOW IMP1811-10 4.35 10 150 l l LOW IMP1811-15 4.13 15 150 l l LOW B C D IMP1811R-5 4.62 5 150 l l LOW C A X X IMP1811R-10 4.35 10 150 l l LOW C B X X IMP1811R-15 4.13 15 150 l l LOW C C X X * Add /S to Part Number for straight (unformed) leads. (ie. IMP18xx-x/S) ** Internal 5.5kΩ resistor pull up. *** Add /T to Part Number for Tape and Reel. (ie. IMP18xx-x/T) 2 A 408-432-9100/www.impweb.com XX = Date code © 1999 IMP, Inc. IMP18 1 1 Absolute Maximum Ratings Voltage on VCC . . . . . . . . . . . . . . . . . . . . . . . . –0.5V to 7V Voltage on RESET . . . . . . . . . . . . . . . . . . . . . –0.5V to VCC + 0.5V Operating Temperature Range . . . . . . . . . . . –40°C to 85°C Soldering Temperature . . . . . . . . . . . . . . . . . . 260°C for 10 seconds Storage Temperature . . . . . . . . . . . . . . . . . . . –55°C to 125°C Voltages measured with respect to ground. These are stress ratings only and functional operation is not implied. Electrical Characteristics Unless otherwise noted, VCC = 1.2V to 5.5V and specifications are over the operating temperature range of – 40°C to +85°C. All voltages are referenced to ground. Parameter Symbol Conditions Supply Voltage VCC Output Voltage VOH IOUT < 500µA Output Current IOL Output = 0.4V, VCC ≥ 2.7V ICC VCC < 5.5V, RESET output open Min Typ 1.2 VCC – 0.5V Max Units 5.5 V VCC – 0.1V V +10 mA 8 20 µA VCC Trip Point (IMP1811-5) VCCTP 4.50 4.62 4.75 V VCC Trip Point (IMP1811-10) VCCTP 4.25 4.35 4.49 V VCC Trip Point (IMP1811-15) VCCTP 4.00 4.13 4.24 V RP 3.5 5.5 7.5 kΩ 10 pF 100 150 250 ms 2 5 Operating Current Internal Pull-Up Resistor Output Capacitance C OUT RESET Active Time t RESET VCC Detect to RESET Low t RPD µs VCC Slew Rate (VCCTP (MAX) to VCCTP (MIN)) tF 300 µs VCC Slew Rate (VCCTP (MIN) to VCCTP (MAX)) tR 0 ns VCC Detect to RESET High t RPU t r = 5µs 100 150 300 ms Notes 1. The tF value is for reference in defining values for tRPD and should not be considered a requirement for proper operation or use. © 1999 IMP, Inc. 408-432-9100/www.impweb.com 3 IMP18 1 1 Application Information Operation – Power Monitor The IMP1811 detects out-of-tolerance power supply conditions. It resets a processor during power-up, power-down and issues a reset to the system processor when the monitored power supply voltage is below the reset threshold. When an out-of-tolerance VCC voltage is detected, the RESET signal is asserted. On power-up, RESET is kept active (LOW) for approximately 150ms after the power supply voltage has reached the selected tolerance. This allows the power supply and microprocessor to stabilize before RESET is released. tF VCC VCCTP (MAX) VCCTP VCCTP (MIN) tRPD RESET tR VCCTP (MIN) VCCTP (MAX) VCCTP VOL 1811_08.eps VCC Figure 2. Timing Diagram: Power-Down tRPU VOH RESET 1811_07.eps Figure 1. Timing Diagram: Power-Up 4 408-432-9100/www.impweb.com © 1999 IMP, Inc. IMP18 1 2 POWER MANAGEMENT Low Power, 5V µP Reset Key Features – Active HIGH, Push-Pull Output The IMP1812 supply voltage monitor is an improved, low-power replacement for the Dallas Semiconductor DS1812. Maximum supply current over temperature is a low 20µA, representing over 50 percent lower power as compared to the DS1812. The IMP1812 issues an active HIGH reset signal whenever the monitored supply is out-of-tolerance. A precision reference and comparator circuit monitor power supply (VCC) level. Tolerance level options are 5-, 10- and 15-percent. When an out-of-tolerance condition is detected, an internal power-fail signal is generated which forces an active HIGH reset signal. After VCC returns to an in-tolerance condition, the reset signal remains active for 150ms to allow the power supply and system microprocessor to stabilize. The IMP1812 is designed with a push-pull output stage and operates over the extended industrial temperature range. Devices are available in compact surface mount SOT-23 packages and 3-lead TO-92 packages. Other low power products in this family include the IMP1810/11/15/16/17, IMP1233D and IMP1233M. ◆ Improved Dallas DS1812 replacement — Over 50% lower maximum supply current ◆ Low Supply Current — 20µA maximum (5.5V) ◆ Automatically restarts a microprocessor after power failure ◆ 150ms reset delay after VCC returns to an in-tolerance condition ◆ Active HIGH power-up reset ◆ Precision temperature-compensated voltage reference and comparator ◆ Eliminates external components ◆ Low-cost TO-92 package ◆ Compact surface mount SOT-23 package ◆ Push-Pull output for minimum current drain ◆ Operating temperature – 40°C to +85°C Family Selection Guide RESET Voltage RESET Time (V) (ms) Part IMP1810 IMP1811 IMP1812 IMP1815 IMP1816 IMP1817 IMP1233D IMP1233M 4.620, 4.370, 4.120 4.620, 4.350, 4.130 4.620, 4.350, 4.130 3.060, 2.880, 2.550 3.060, 2.880, 2.550 3.060, 2.880, 2.550 4.625, 4.375, 4.125 4.625, 4.375, 2.720 150 150 150 150 150 150 350 350 Output Stage RESET Polarity Push-Pull Open-Drain Push-Pull Push-Pull Open-Drain Push-Pull Open-Drain Open-Drain LOW LOW HIGH LOW LOW HIGH LOW LOW Applications ◆ ◆ ◆ ◆ ◆ ◆ ◆ Set-top boxes Cellular phones PDAs Energy management systems Embedded control systems Printers Single board computers Block Diagram Typical Application VCC 1 VCC Supply Tolerance Bias IMP1812 IMP1812 + – Microprocessor Delay 150ms Typical 2 RESET RESET RESET GND Reference 3 GND © 1999 IMP, Inc. 1812_02.eps 1812_01.eps 408-432-9100/www.impweb.com 1 IMP18 1 2 Pin Configuration SOT23 RESET TO-92* 1 IMP1812-X IMP1812-X 3 VCC GND 2 1 1812_03.eps 2 3 1812_04.eps Pin Descriptions Pin Number Name Function 1 RESET 2 VCC Power supply input 3 GND Ground Active HIGH reset output Package Marking Code SOT-23 Package Letter Code 3 A B Part Reset Tolerance D D D A B C IMP1812 IMP1812 IMP1812 5% 10% 15% A B C 1 D 2 1812_t02.eps 1812_05a.eps Ordering Information Device Summary Part** Number Package Marking RESET RESET RESET Push-Pull Output -92* SOT-23 rance Time Output PTaOck Voltage Tole(% age Package ) (ms) Stage (V) A B C D IMP1812-5 4.62 5 150 l l HIGH IMP1812-10 4.35 10 150 l l HIGH IMP1812-15 4.13 15 150 l l HIGH IMP1812R-5 4.62 5 150 l l HIGH D A X X IMP1812R-10 4.35 10 150 l l HIGH D B X X IMP1812R-15 4.13 15 150 l l HIGH D C X X * Add /S to Part Number for straight (unformed) leads. (ie. IMP18xx-x/S) ** Add /T to Part Number for Tape and Reel. (ie. IMP18xx-x/T) 2 RESET Polarity 408-432-9100/www.impweb.com XX = Date code © 1999 IMP, Inc. IMP18 1 2 Absolute Maximum Ratings Voltage on VCC . . . . . . . . . . . . . . . . . . . . . . . . –0.5V to 7V Voltage on RESET . . . . . . . . . . . . . . . . . . . . . –0.5V to VCC + 0.5V Operating Temperature Range . . . . . . . . . . . –40°C to 85°C Soldering Temperature . . . . . . . . . . . . . . . . . . 260°C for 10 seconds Storage Temperature . . . . . . . . . . . . . . . . . . . –55°C to 125°C Voltages measured with respect to ground. These are stress ratings only and functional operation is not implied. Electrical Characteristics Unless otherwise noted, VCC = 1.2V to 5.5V and specifications are over the operating temperature range of – 40°C to +85°C. All voltages are referenced to ground. Parameter Symbol Conditions Supply Voltage VCC Output Voltage VOH IOUT < 500µA Output Current IOH Output = 2.4V, VCC ≥ 2.7V Output Current IOL Output = 0.4V, VCC ≥ 2.7V Operating Current ICC VCC < 5.5V, RESET output open Min Typ 1.2 VCC – 0.5V Max Units 5.5 V VCC – 0.1V V 350 µA +10 mA 8 20 µA VCC Trip Point (IMP1812-5) VCCTP 4.50 4.62 4.75 V VCC Trip Point (IMP1812-10) VCCTP 4.25 4.35 4.49 V VCC Trip Point (IMP1812-15) VCCTP 4.00 4.13 4.24 V 10 pF 100 150 250 ms 2 5 Output Capacitance C OUT RESET Active Time t RESET VCC Detect to RESET Low t RPD µs VCC Slew Rate (VCCTP (MAX) to VCCTP (MIN)) tF 300 µs VCC Slew Rate (VCCTP (MIN) to VCCTP (MAX)) tR 0 ns VCC Detect to RESET High t RPU t R = 5µs 100 150 300 ms Notes 1. The tF value is for reference in defining values for tRPD and should not be considered a requirement for proper operation or use. © 1999 IMP, Inc. 408-432-9100/www.impweb.com 3 IMP1 8 1 2 Application Information Operation – Power Monitor The IMP1812 detects out-of-tolerance power supply conditions. It resets a processor during power-up, power-down and issues a reset to the system processor when the monitored power supply voltage is below the reset threshold. When an out-of-tolerance VCC voltage is detected, the RESET signal is asserted. On power-up, RESET is kept active (HIGH) for approximately 150ms after the power supply voltage has reached the selected tolerance. This allows the power supply and microprocessor to stabilize before RESET is released. tF VCC VCCTP (MAX) VCCTP tRPD VOH tR VCCTP (MIN) VCCTP (MIN) RESET Slews with VCC RESET VCCTP (MAX) VCCTP 1812_07.eps Figure 2. Timing Diagram: Power-Down VIN tRPU RESET VOL 1812_06.eps Figure 1. Timing Diagram: Power-Up 4 408-432-9100/www.impweb.com © 1999 IMP, Inc. IMP18 1 5 POWER MANAGEMENT Low Power, 3.3V/3.0V µP Reset – Active LOW, Push-Pull Output The IMP1815 supply voltage monitor is an improved, low-power replacement for the Dallas Semiconductor DS1815. Maximum supply current over temperature is a low 15µA, representing over 50 percent lower power as compared to the DS1815. The IMP1815 issues an active LOW reset signal whenever the monitored supply is out-of-tolerance. A precision reference and comparator circuit monitor power supply (VCC) level. Tolerance level options are 5-, 10- and 20-percent. When an out-of-tolerance condition is detected, an internal power-fail signal is generated which forces an active LOW reset signal. After VCC returns to an in-tolerance condition, the reset signal remains active for 150ms to allow the power supply and system microprocessor to stabilize. The IMP1815 is designed with a push-pull output stage and operates over the extended industrial temperature range. Devices are available in compact surface mount SOT-23 packages and 3-lead TO-92 packages. Other low power products in this family include the IMP1810/11/12/16/17, IMP1233D and IMP1233M. Key Features ◆ Improved Dallas DS1815 replacement — Over 50% lower maximum supply current ◆ Low Supply Current — 20µA maximum (5.5V) — 15µA maximum (3.6V) ◆ Automatically restarts a microprocessor after power failure ◆ 150ms reset delay after VCC returns to an in-tolerance condition ◆ Active LOW power-up reset ◆ Precision temperature-compensated voltage reference and comparator ◆ Eliminates external components ◆ Low-cost TO-92 package ◆ Compact surface mount SOT-23 package ◆ Push-Pull output for minimum current drain ◆ Operating temperature – 40°C to +85°C Family Selection Guide RESET Voltage RESET Time (V) (ms) Part IMP1810 IMP1811 IMP1812 IMP1815 IMP1816 IMP1817 IMP1233D IMP1233M 4.620, 4.370, 4.120 4.620, 4.350, 4.130 4.620, 4.350, 4.130 3.060, 2.880, 2.550 3.060, 2.880, 2.550 3.060, 2.880, 2.550 4.625, 4.375, 4.125 4.625, 4.375, 2.720 150 150 150 150 150 150 350 350 Output Stage RESET Polarity Push-Pull Open-Drain Push-Pull Push-Pull Open-Drain Push-Pull Open-Drain Open-Drain LOW LOW HIGH LOW LOW HIGH LOW LOW Applications ◆ ◆ ◆ ◆ ◆ ◆ ◆ Set-top boxes Cellular phones PDAs Energy management systems Embedded control systems Printers Single board computers Block Diagram Typical Application VCC 1 VCC Supply Tolerance Bias IMP1815 IMP1815 Microprocessor + – 2 Delay 150ms Typical RESET RESET RESET GND Reference 3 GND © 1999 IMP, Inc. 1815_02.eps 1815_01.eps 408-432-9100/www.impweb.com 1 IMP18 1 5 Pin Configuration SOT23 RESET TO-92* 1 IMP1815-X IMP1815-X 3 VCC GND 2 1 1815_03.eps 2 3 1815_04.eps Pin Descriptions Pin Number Name Function 1 RESET 2 VCC Power supply input 3 GND Ground Active LOW reset output Package Marking Code 3 SOT-23 Package Letter Code A B Part Reset Tolerance E E E A B D IMP1815 IMP1815 IMP1815 5% 10% 20% A B C 1 D 2 1815_05a.eps 1815_t02.eps Ordering Information Device Summary Part** Number Package Marking RESET RESET RESET Push-Pull Output -92* SOT-23 rance Time Output PTaOck Voltage Tole(% age Package ) (ms) Stage (V) A B C D IMP1815-5 3.06 5 150 l l LOW IMP1815-10 2.88 10 150 l l LOW IMP1815-20 2.55 20 150 l l LOW IMP1815R-5 3.06 5 150 l l LOW E A X X IMP1815R-10 2.88 10 150 l l LOW E B X X IMP1815R-20 2.55 20 150 l l LOW E D X X * Add /S to Part Number for straight (unformed) leads. (ie. IMP18xx-x/S) ** Add /T to Part Number for Tape and Reel. (ie. IMP18xx-x/T) 2 RESET Polarity 408-432-9100/www.impweb.com XX = Date code © 1999 IMP, Inc. IMP18 1 5 Absolute Maximum Ratings Voltage on VCC . . . . . . . . . . . . . . . . . . . . . . . . –0.5V to 7V Voltage on RESET . . . . . . . . . . . . . . . . . . . . . –0.5V to VCC + 0.5V Operating Temperature Range . . . . . . . . . . . –40°C to 85°C Soldering Temperature . . . . . . . . . . . . . . . . . . 260°C for 10 seconds Storage Temperature . . . . . . . . . . . . . . . . . . . –55°C to 125°C Voltages measured with respect to ground. These are stress ratings only and functional operation is not implied. Electrical Characteristics Unless otherwise noted, VCC = 1.2V to 5.5V and specifications are over the operating temperature range of – 40°C to +85°C. All voltages are referenced to ground. Parameter Symbol Conditions Supply Voltage VCC Output Voltage VOH IOUT < 500µA Output Current IOH Output = 2.4V, VCC ≥ 2.7V Output Current IOL Output = 0.4V, VCC ≥ 2.7V Operating Current ICC VCC < 5.5V, RESET output open ICC VCC ≤ 3.6V, RESET output open Min Typ 1.2 VCC – 0.5V Max Units 5.5 V VCC – 0.1V V 350 µA +10 mA 8 20 µA 6 15 µA VCC Trip Point (IMP1815-5) VCCTP 2.98 3.06 3.15 V VCC Trip Point (IMP1815-10) VCCTP 2.80 2.88 2.97 V VCC Trip Point (IMP1815-20) VCCTP 2.47 2.55 2.64 V Output Capacitance C OUT 10 pF VCC Detect to RESET t RPD 5 µs Operating Current VCC Slew Rate (VCCTP (MAX) to VCCTP (MIN)) tF VCC Slew Rate (VCCTP (MIN) to VCCTP (MAX)) tR VCC Detect to RESET t RPU 2 Note 1 t R = 5µs 300 µs 0 ns 100 150 250 ms Notes 1. The tF value is for reference in defining values for tRPD and should not be considered a requirement for proper operation or use. © 1999 IMP, Inc. 408-432-9100/www.impweb.com 3 IMP18 1 5 Application Information Operation – Power Monitor Output Conditions The IMP1815 detects out-of-tolerance power supply conditions. It resets a processor during power-up, power-down and issues a reset to the system processor when the monitored power supply voltage is below the reset threshold. When an out-of-tolerance VCC voltage is detected, the RESET signal is asserted. On power-up, RESET is kept active (LOW) for approximately 150ms after the power supply voltage has reached the selected tolerance. This allows the power supply and microprocessor to stabilize before RESET is released. The IMP1815 active LOW reset signal is valid as long as VCC remains above 1.2V. The RESET output on the IMP1815 uses a push-pull drive stage that can maintain a valid output below 1.2V. To sink current with VCC below 1.2V, a resistor can be connected from the reset pin (RESET) to Ground (see Figure 1). This configuration will give a valid value on the RESET output with VCC approaching 0V. During both power up and down, this configuration will draw current when RESET is in the high state. A value of 100kΩ should be adequate to maintain a valid condition. tR VCCTP (MIN) VCCTP (MAX) VCCTP IMP1815 Microprocessor RESET VCC tRPU RESET VOH 100k RESET 1815_07.eps 1815_06.eps Figure 2. Timing Diagram: Power-Up Figure 1. RESET Valid to 0V VCC tF VCC VCCTP (MAX) VCCTP VCCTP (MIN) tRPD RESET VOL 1815_08.eps Figure 3. Timing Diagram: Power-Down 4 408-432-9100/www.impweb.com © 1999 IMP, Inc. IMP18 16 POWER MANAGEMENT Low Power, 3.3V/3.0V µP Reset – Active LOW, Open-Drain Output The IMP1816 supply voltage monitor is an improved, low-power replacement for the Dallas Semiconductor DS1816. Maximum supply current over temperature is a low 15µA, representing over 50 percent lower power as compared to the DS1816. The IMP1816 issues an active LOW reset signal whenever the monitored supply is out-of-tolerance. A precision reference and comparator circuit monitor power supply (VCC) level. Tolerance level options are 5-, 10- and 20-percent. When an out-of-tolerance condition is detected, an internal power-fail signal is generated which forces an active LOW reset signal. After VCC returns to an in-tolerance condition, the reset signal remains active for 150ms to allow the power supply and system microprocessor to stabilize. The IMP1816 is designed with a open-drain output stage and operates over the extended industrial temperature range. Devices are available in compact surface mount SOT-23 packages and 3-lead TO-92 packages. Other low power products in this family include the IMP1810/11/12/15/17, IMP1233D and IMP1233M. Key Features ◆ Improved Dallas DS1816 replacement — Over 70% lower maximum supply current ◆ Low Supply Current — 20µA maximum (5.5V) — 15µA maximum (3.6V) ◆ Automatically restarts a microprocessor after power failure ◆ 150ms reset delay after VCC returns to an in-tolerance condition ◆ Active LOW power-up reset ◆ Precision temperature-compensated voltage reference and comparator ◆ Eliminates external components ◆ Low-cost TO-92 package ◆ Compact surface mount SOT-23 package ◆ Operating temperature – 40°C to +85°C Family Selection Guide Applications RESET Voltage RESET Time (V) (ms) Part IMP1810 IMP1811 IMP1812 IMP1815 IMP1816 IMP1817 IMP1233D IMP1233M 4.620, 4.370, 4.120 4.620, 4.350, 4.130 4.620, 4.350, 4.130 3.060, 2.880, 2.550 3.060, 2.880, 2.550 3.060, 2.880, 2.550 4.625, 4.375, 4.125 4.625, 4.375, 2.720 150 150 150 150 150 150 350 350 Output Stage RESET Polarity Push-Pull Open-Drain Push-Pull Push-Pull Open-Drain Push-Pull Open-Drain Open-Drain LOW LOW HIGH LOW LOW HIGH LOW LOW ◆ ◆ ◆ ◆ ◆ ◆ ◆ Set-top boxes Cellular phones PDAs Energy management systems Embedded control systems Printers Single board computers Block Diagram Typical Application VCC 1 VCC Supply Tolerance Bias IMP1816 5.5kΩ 2 + – IMP1816 RESET Delay 150ms Typical Microprocessor RESET RESET GND Reference 3 GND © 1999 IMP, Inc. 1816_02.eps 1816_01.eps 408-432-9100/www.impweb.com 1 IMP18 16 Pin Configuration SOT23 RESET TO-92* 1 IMP1816-X IMP1816-X 3 VCC GND 2 1 1816_03.eps 2 3 1816_04.eps Pin Descriptions Pin Number Name Function 1 RESET Active LOW reset output 2 VCC Power supply input 3 GND Ground Package Marking Code 3 SOT-23 Package Letter Code A B Part Reset Tolerance K K K A B D IMP1816 IMP1816 IMP1816 5% 10% 20% A B C 1 D 2 1816_05a.eps 1816_t02.eps Ordering Information Device Summary RESET ESET RESET Part*** Output TR o l erance Time Number Voltage (%) (ms) (V) Package Marking Open-Drain** TO-92* SOT-23 RESET Output Package Package Polarity Stage B C D IMP1816-5 3.06 5 150 l l LOW IMP1816-10 2.88 10 150 l l LOW IMP1816-20 2.55 20 150 l l LOW IMP1816R-5 3.06 5 150 l l LOW K A X X IMP1816R-10 2.88 10 150 l l LOW K B X X IMP1816R-20 2.55 20 150 l l LOW K D X X * Add /S to Part Number for straight (unformed) leads. (ie. IMP18xx-x/S) ** Internal 5.5kΩ resistor pull up. *** Add /T to Part Number for Tape and Reel. (ie. IMP18xx-x/T) 2 A 408-432-9100/www.impweb.com XX = Date code © 1999 IMP, Inc. IMP18 16 Absolute Maximum Ratings Voltage on VCC . . . . . . . . . . . . . . . . . . . . . . . . –0.5V to 7V Voltage on RESET . . . . . . . . . . . . . . . . . . . . . –0.5V to VCC + 0.5V Operating Temperature Range . . . . . . . . . . . –40°C to 85°C Soldering Temperature . . . . . . . . . . . . . . . . . . 260°C for 10 seconds Storage Temperature . . . . . . . . . . . . . . . . . . . –55°C to 125°C Voltages measured with respect to ground. These are stress ratings only and functional operation is not implied. Electrical Characteristics Unless otherwise noted, VCC = 1.2V to 5.5V and specifications are over the operating temperature range of – 40°C to +85°C. All voltages are referenced to ground. Parameter Symbol Conditions Min Typ 1.2 Max Units 5.5 V Supply Voltage VCC Output Voltage VOH IOUT < 500µA Output Current IOL Output = 0.4V, VCC ≥ 2.7V Operating Current ICC VCC < 5.5V, RESET output open 8 20 µA Operating Current ICC VCC ≤ 3.6V, RESET output open 6 15 µA VCC – 0.5V VCC – 0.1V V +10 mA VCC Trip Point (IMP1816-5) VCCTP 2.98 3.06 3.15 V VCC Trip Point (IMP1816-10) VCCTP 2.80 2.88 2.97 V VCC Trip Point (IMP1816-20) VCCTP 2.47 2.55 2.64 V RP 3.5 5.5 7.5 kΩ 10 pF 5 µs Internal Pull-Up Resistor Output Capacitance C OUT VCC Detect to RESET Low t RPD VCC Slew Rate (VCCTP (MAX) to VCCTP (MIN)) tF VCC Slew Rate (VCCTP (MIN) to VCCTP (MAX)) tR VCC Detect to RESET High t RPU 2 Note 1 t R = 5µs 300 µs 0 ns 100 150 250 ms Notes 1. The tF value is for reference in defining values for tRPD and should not be considered a requirement for proper operation or use. © 1999 IMP, Inc. 408-432-9100/www.impweb.com 3 IMP18 16 Application Information Operation – Power Monitor The IMP1816 detects out-of-tolerance power supply conditions. It resets a processor during power-up, power-down and issues a reset to the system processor when the monitored power supply voltage is below the reset threshold. When an out-of-tolerance VCC voltage is detected, the RESET signal is asserted. On power-up, RESET is kept active (LOW) for approximately 150ms after the power supply voltage has reached the selected tolerance. This allows the power supply and microprocessor to stabilize before RESET is released. tF VCC VCCTP (MAX) VCCTP VCCTP (MIN) tRPD RESET tR VCCTP (MIN) VCCTP (MAX) VCCTP VOL 1816_07.eps VCC Figure 2. Timing Diagram: Power-Down tRPU VOH RESET 1816_06.eps Figure 1. Timing Diagram: Power-Up 4 408-432-9100/www.impweb.com © 1999 IMP, Inc. IMP18 17 POWER MANAGEMENT Low Power, 3.3V/3.0V µP Reset – Active HIGH, Push-Pull Output The IMP1817 supply voltage monitor is an improved, low-power replacement for the Dallas Semiconductor DS1817. Maximum supply current over temperature is a low 15µA, representing over 50 percent lower power as compared to the DS1817. The IMP1817 issues an active HIGH reset signal whenever the monitored supply is out-of-tolerance. A precision reference and comparator circuit monitor power supply (VCC) level. Tolerance level options are 5-, 10- and 20-percent. When an out-of-tolerance condition is detected, an internal power-fail signal is generated which forces an active HIGH reset signal. After VCC returns to an in-tolerance condition, the reset signal remains active for 150ms to allow the power supply and system microprocessor to stabilize. The IMP1817 is designed with a push-pull output stage and operates over the extended industrial temperature range. Devices are available in compact surface mount SOT-23 packages and 3-lead TO-92 packages. Other low power products in this family include the IMP1810/11/12/15/16, IMP1233D and IMP1233M. Key Features ◆ Improved Dallas DS1817 replacement — Over 50% lower maximum supply current ◆ Low Supply Current — 20µA maximum (5.5V) — 15µA maximum (3.6V) ◆ Automatically restarts a microprocessor after power failure ◆ 150ms reset delay after VCC returns to an in-tolerance condition ◆ Active HIGH power-up reset ◆ Precision temperature-compensated voltage reference and comparator ◆ Eliminates external components ◆ Low-cost TO-92 package ◆ Compact surface mount SOT-23 package ◆ Push-Pull output for minimum current drain ◆ Operating temperature – 40°C to +85°C Family Selection Guide RESET Voltage RESET Time (V) (ms) Part IMP1810 IMP1811 IMP1812 IMP1815 IMP1816 IMP1817 IMP1233D IMP1233M 4.620, 4.370, 4.120 4.620, 4.350, 4.130 4.620, 4.350, 4.130 3.060, 2.880, 2.550 3.060, 2.880, 2.550 3.060, 2.880, 2.550 4.625, 4.375, 4.125 4.625, 4.375, 2.720 150 150 150 150 150 150 350 350 Output Stage RESET Polarity Push-Pull Open-Drain Push-Pull Push-Pull Open-Drain Push-Pull Open-Drain Open-Drain LOW LOW HIGH LOW LOW HIGH LOW LOW Applications ◆ ◆ ◆ ◆ ◆ ◆ ◆ Set-top boxes Cellular phones PDAs Energy management systems Embedded control systems Printers Single board computers Block Diagram Typical Application VCC 1 VCC Supply Tolerance Bias IMP1817 IMP1817 + – Microprocessor Delay 150ms Typical 2 RESET RESET RESET GND Reference 3 GND © 1999 IMP, Inc. 1817_02.eps 1817_01.eps 408-432-9100/www.impweb.com 1 IMP18 17 Pin Configuration SOT23 RESET TO-92* 1 IMP1817-X IMP1817-X 3 VCC GND 2 1 1817_03.eps 2 3 1817_04.eps Pin Descriptions Pin Number Name Function 1 RESET Active LOW reset output 2 VCC Power supply input 3 GND Ground Package Marking Code 3 SOT-23 Package Letter Code A B Part Reset Tolerance M M M A B C IMP1817 IMP1817 IMP1817 5% 10% 20% A B C 1 D 2 1817_05a.eps 1817_t02.eps Ordering Information Device Summary Part** Number Package Marking RESET RESET RESET Push-Pull Output -92* SOT-23 rance Time Output PTaOck Voltage Tole(% age Package ) (ms) Stage (V) A B C D IMP1817-5 3.06 5 150 l l LOW IMP1817-10 2.88 10 150 l l LOW IMP1817-20 2.55 20 150 l l LOW IMP1817R-5 3.06 5 150 l l LOW M A X X IMP1817R-10 2.88 10 150 l l LOW M B X X l LOW M C X X 2.55 20 150 l * Add /S to Part Number for straight (unformed) leads. (ie. IMP18xx-x/S) ** Add /T to Part Number for Tape and Reel. (ie. IMP18xx-x/T) IMP1817R-20 2 RESET Polarity 408-432-9100/www.impweb.com XX = Date code © 1999 IMP, Inc. IMP1 8 17 Absolute Maximum Ratings Voltage on VCC . . . . . . . . . . . . . . . . . . . . . . . . –0.5V to 7V Voltage on RESET . . . . . . . . . . . . . . . . . . . . . –0.5V to VCC + 0.5V Operating Temperature Range . . . . . . . . . . . –40°C to 85°C Soldering Temperature . . . . . . . . . . . . . . . . . . 260°C for 10 seconds Storage Temperature . . . . . . . . . . . . . . . . . . . –55°C to 125°C Voltages measured with respect to ground. These are stress ratings only and functional operation is not implied. Electrical Characteristics Unless otherwise noted, VCC = 1.2V to 5.5V and specifications are over the operating temperature range of – 40°C to +85°C. All voltages are referenced to ground. Parameter Symbol Conditions Supply Voltage VCC Output Voltage VOH IOUT < 500µA Output Current IOH Output = 2.4V, VCC ≥ 2.7V Output Current IOL Output = 0.4V, VCC ≥ 2.7V Operating Current ICC VCC < 5.5V, RESET output open ICC VCC ≤ 3.6V, RESET output open Min Typ 1.2 VCC – 0.5V Max Units 5.5 V VCC – 0.1V V 350 µA +10 mA 8 20 µA 6 15 µA VCC Trip Point (IMP1817-5) VCCTP 2.98 3.06 3.15 V VCC Trip Point (IMP1817-10) VCCTP 2.80 2.88 2.97 V VCC Trip Point (IMP1817-20) VCCTP 2.47 2.55 2.64 V Output Capacitance C OUT 10 pF VCC Detect to RESET Low t RPD 5 µs Operating Current VCC Slew Rate (VCCTP (MAX) to VCCTP (MIN)) tF VCC Slew Rate (VCCTP (MIN) to VCCTP (MAX)) tR VCC Detect to RESET High t RPU 2 Note 1 t R = 5µs 300 µs 0 ns 100 150 250 ms Notes 1. The tF value is for reference in defining values for tRPD and should not be considered a requirement for proper operation or use. © 1999 IMP, Inc. 408-432-9100/www.impweb.com 3 IMP18 17 Application Information Operation – Power Monitor The IMP1817 detects out-of-tolerance power supply conditions. It resets a processor during power-up, power-down and issues a reset to the system processor when the monitored power supply voltage is below the reset threshold. When an out-of-tolerance VCC voltage is detected, the RESET signal is asserted. On power-up, RESET is kept active (HIGH) for approximately 150ms after the power supply voltage has reached the selected tolerance. This allows the power supply and microprocessor to stabilize before RESET is released. tR VCCTP (MIN) VCCTP (MAX) VCCTP IMP1817 Microprocessor RESET VIN tRPU RESET VOL RESET 1817_07.eps 1815_07.eps Figure 2. Timing Diagram: Power-Up Figure 1. RESET Valid to 0V VCC tF VCC VCCTP (MAX) VCCTP VCCTP (MIN) tRPD VOH RESET Slews with VCC RESET 1817_08.eps Figure 3. Timing Diagram: Power-Down 4 408-432-9100/www.impweb.com © 1999 IMP, Inc. IMP1 233D POWER MANAGEMENT Key Features Low Power, 5V µP Reset – Active LOW, Open-Drain Output – 350ms Reset Period The IMP1233D supply voltage monitor is an improved, low-power replacement for the Dallas Semiconductor DS1233D. Maximum supply current over temperature is a low 20µA, representing over 60 percent lower power as compared to the DS1233D. The IMP1233D issues an active LOW reset signal whenever the monitored supply is out-of-tolerance. A precision reference and comparator circuit monitor power supply (VCC) level. Tolerance level options are 5-, 10- and 15-percent. When an out-of-tolerance condition is detected, an internal power-fail signal is generated which forces an active LOW reset signal. After VCC returns to an in-tolerance condition, the reset signal remains active for 350ms to allow the power supply and system microprocessor to stabilize. The IMP1233D is designed with a open-drain output stage and operates over the extended industrial temperature range. Devices are available in compact surface mount SOT-223 packages and 3-lead TO-92 packages. Other low power products in this family include the IMP1810/11/12/15/ 16/17 and IMP1233M. ◆ Improved Dallas DS1233D replacement — Over 60% lower maximum supply current ◆ Low Supply Current — 20µA maximum (5.5V) — 15µA maximum (3.6V) ◆ Automatically restarts a microprocessor after power failure ◆ 350ms reset delay after VCC returns to an in-tolerance condition ◆ Active LOW power-up reset, 5kΩ internal pull-up ◆ Precision temperature-compensated voltage reference and comparator ◆ Eliminates external components ◆ Motorola 68xxx and HC16 compatible ◆ Low-cost TO-92 package ◆ Compact surface mount SOT-223 package ◆ Operating temperature – 40°C to +85°C Family Selection Guide Part IMP1810 IMP1811 IMP1812 IMP1815 IMP1816 IMP1817 IMP1233D IMP1233M Applications RESET Voltage RESET Time (V) (ms) 4.620, 4.370, 4.120 4.620, 4.350, 4.130 4.620, 4.350, 4.130 3.060, 2.880, 2.550 3.060, 2.880, 2.550 3.060, 2.880, 2.550 4.625, 4.375, 4.125 4.625, 4.375, 2.720 150 150 150 150 150 150 350 350 Output Stage RESET Polarity Push-Pull Open-Drain Push-Pull Push-Pull Open-Drain Push-Pull Open-Drain Open-Drain LOW LOW HIGH LOW LOW HIGH LOW LOW ◆ ◆ ◆ ◆ ◆ ◆ ◆ Set-top boxes Cellular phones PDAs Energy management systems Embedded control systems Printers Single board computers Block Diagram Typical Application VCC VCC Supply Tolerance Bias IMP1233D 5.0kΩ IMP1233D RESET + – Delay 350ms Typical RESET RESET GND Reference GND © 1999 IMP, Inc. Microprocessor 1233D_02.eps 1233D_01.eps 408-432-9100/www.impweb.com 1 IMP1 233D Pin Configuration SOT-223 RESET 2 GND 4 VCC 3 TO-92* IMP1233D-X IMP1233D-X 1 GND 1 1233D_03.eps 2 3 Pin Descriptions Pin Numbers SOT-223 TO-92 1 2 3 4 1 2 3 — 1233D_04.eps Name Function GND RESET VCC GND Ground Active LOW reset output Power supply input Ground (SOT-223 Only) Package Marking Code 1 Package Letter Code A B C 3 3 D Part Type Package Letter Code D IMP1233D A B C Reset Tolerance A 5% 10% 15% 2 B D C 4 3 1233D_05a.eps Ordering Information Device Summary Part Number RESET Output Voltage (V) Package Marking Output Stage D RESET RESET TO-92* SOT-223** RESET *** Tolerance Time Open-Drain Push-Pull Package Package Polarity A (%) (ms) IMP1233D-5 4.625 5 350 X X LOW IMP1233D-10 4.375 10 350 X X LOW IMP1233D-15 4.125 15 350 X X LOW IMP1233DZ-5 4.625 5 350 X X LOW 3 B A = 5% C B = 10% C = 15% 3 D A IMP1233DZ-10 4.375 10 350 X X LOW 3 3 D B IMP1233DZ-15 4.125 15 350 X X LOW 3 3 D C * Add /S to Part Number for straight (unformed) leads. (ie. IMP18xx-x/S) ** Add /T to Part Number for Tape and Reel. (ie. IMP18xx-x/T) *** Internal 5kΩ resistor pull up. 2 408-432-9100/www.impweb.com 1233D_t03.eps © 1999 IMP, Inc. IMP1 233D Absolute Maximum Ratings Voltage on VCC . . . . . . . . . . . . . . . . . . . . . . . . –0.5V to 7V Voltage on RESET . . . . . . . . . . . . . . . . . . . . . –0.5V to VCC + 0.5V Operating Temperature Range . . . . . . . . . . . –40°C to 85°C Soldering Temperature . . . . . . . . . . . . . . . . . . 260°C for 10 seconds Storage Temperature . . . . . . . . . . . . . . . . . . . –55°C to 125°C Voltages measured with respect to ground. These are stress ratings only and functional operation is not implied. Electrical Characteristics Unless otherwise noted, VCC = 1.2V to 5.5V and specifications are over the operating temperature range of – 40°C to +85°C. All voltages are referenced to ground. Parameter Symbol Conditions Min Typ 1.2 Max Units 5.5 V Supply Voltage VCC Output Voltage VOH IOUT < 500µA Output Current IOL Output = 0.4V, VCC ≥ 2.7V Operating Current ICC VCC < 5.5V, RESET output open 8 20 µA Operating Current ICC VCC ≤ 3.6V, RESET output open 6 15 µA VCC – 0.5V VCC – 0.1V V +8 mA VCC Trip Point (IMP1233D-5) VCCTP 4.50 4.625 4.74 V VCC Trip Point (IMP1233D-10) VCCTP 4.25 4.375 4.49 V VCC Trip Point (IMP1233D-15) VCCTP 4.00 4.125 4.24 V RP 3.5 5.0 7.5 kΩ 10 pF 250 350 450 ms 2 5 µs Internal Pull-Up Resistor Output Capacitance C OUT RESET Active Time t RESET VCC Detect to RESET Low t RPD VCC Slew Rate (VHTL - VLTL) tF 300 µs VCC Slew Rate (VLTL - VHTL) tR 0 ns VCC Detect to RESET High © 1999 IMP, Inc. t RPU t R = 5µs 408-432-9100/www.impweb.com 250 350 450 ms 3 IMP1 233D Application Information Operation – Power Monitor The IMP1233D detects out-of-tolerance power supply conditions. It resets a processor during power-up and issues a reset to the system processor when the monitored power supply voltage is below the reset threshold (power-down). When an out-of-tolerance VCC voltage is detected, the RESET signal is asserted. On power-up, RESET is kept active (LOW) for approximately 350ms after the power supply voltage has reached the selected tolerance. This allows the power supply and microprocessor to stabilize before RESET is released. tR VCCTP (MAX) VCCTP VCCTP (MIN) VCC tRPU VOH RESET 1233D_06.eps Figure 1. Timing Diagram: Power-Up tF VCC VCCTP (MAX) VCCTP VCCTP (MIN) tRPD RESET VOL 1233D_07.eps Figure 2. Timing Diagram: Power-Down 4 408-432-9100/www.impweb.com © 1999 IMP, Inc. IMP1 233M POWER MANAGEMENT Key Features Low Power, 5V/3.0V µP Reset – Active LOW, Open-Drain Output – 350ms Reset Period The IMP1233M supply voltage monitor is an improved, low-power replacement for the Dallas Semiconductor DS1233M. Maximum supply current over temperature is a low 20µA, representing 60 percent lower power as compared to the DS1233M. The IMP1233M issues an active LOW reset signal whenever the monitored supply is out-of-tolerance. A precision reference and comparator circuit monitor power supply (VCC) level. Tolerance level options are 5- and 10-percent for a 5V power supply. The tolerance is 15-percent for the 3.3V, IMP1233M. When an out-of-tolerance condition is detected, an internal power-fail signal is generated which forces an active LOW reset signal. After VCC returns to an in-tolerance condition, the reset signal remains active for 350ms to allow the power supply and system microprocessor to stabilize. The IMP1233M is designed with a open-drain output stage and operates over the extended industrial temperature range. Devices are available in the compact surface mount SO-8 package and a 3-lead TO-92 package. Other low power products in this family include the IMP1810/11/12/15/ 16/17 and IMP1233D. Family Selection Guide RESET Voltage RESET Time (V) (ms) Part IMP1810 IMP1811 IMP1812 IMP1815 IMP1816 IMP1817 IMP1233D IMP1233M 4.620, 4.370, 4.120 4.620, 4.350, 4.130 4.620, 4.350, 4.130 3.060, 2.880, 2.550 3.060, 2.880, 2.550 3.060, 2.880, 2.550 4.625, 4.375, 4.125 4.625, 4.375, 2.720 150 150 150 150 150 150 350 350 Output Stage RESET Polarity Push-Pull Open-Drain Push-Pull Push-Pull Open-Drain Push-Pull Open-Drain Open-Drain LOW LOW HIGH LOW LOW HIGH LOW LOW ◆ Improved Dallas DS1233M replacement — 60% lower maximum supply current ◆ Low Supply Current — 20µA maximum (5.5V) — 15µA maximum (3.6V) ◆ Automatically restarts a microprocessor after power failure ◆ 350ms reset delay after VCC returns to an in-tolerance condition ◆ Active LOW power-up reset, 5kΩ internal pull-up ◆ Precision temperature-compensated voltage reference and comparator ◆ Eliminates external components ◆ Pin function compatible with the Motorola MC33064, MC34064, MC33164 and MC34164 ◆ Motorola 68xxx and HC16 compatible ◆ Low-cost TO-92 package ◆ Compact surface mount SO-8 package ◆ Operating temperature – 40°C to +85°C Applications ◆ ◆ ◆ ◆ ◆ ◆ ◆ Set-top boxes Cellular phones PDAs Energy management systems Embedded control systems Printers Single board computers Block Diagram Typical Application VCC VCC Supply Tolerance Bias IMP1233M 5.0kΩ IMP1233M RESET + – Delay 350ms Typical RESET RESET GND Reference GND © 1999 IMP, Inc. Microprocessor 1233M_02.eps 1233M_01.eps 408-432-9100/www.impweb.com 1 IMP1 233M Pin Configuration SO-8 TO-92* RESET 1 8 NC VCC 2 7 NC NC 3 6 NC GND 4 5 NC IMP1233M IMP1233M-X 1233M_03.eps 1 2 3 1233M_04.eps Pin Descriptions Pin Numbers SO-8 TO-92 1 2 3, 5, 6, 7 and 8 4 1 2 — 3 Name Function RESET VCC NC GND Active LOW reset output Power supply input No connection Ground Ordering Information Device Summary Part Number IMP1233M-55 RESET Output Voltage (V) 4.625 Output Stage RESET RESET TO-92* Tolerance Time P ackage (%) (ms) Open-Drain** Push-Pull 5 350 X SO-8 Package X RESET Polarity LOW IMP1233M-5 4.375 10 350 X X LOW IMP1233M-3 2.720 15 350 X X LOW IMP1233MS-55 4.625 5 350 X X LOW IMP1233MS-5 4.375 10 350 X X LOW IMP1233MS-3 2.720 15 350 X X LOW * Add /S to Part Number for straight (unformed) leads. (ie. IMP18xx-x/S) ** Internal 5kΩ resistor pull up. 2 408-432-9100/www.impweb.com 1233M03 © 1999 IMP, Inc. IMP1 233M Absolute Maximum Ratings Voltage on VCC . . . . . . . . . . . . . . . . . . . . . . . . –0.5V to 6.5V Voltage on RESET . . . . . . . . . . . . . . . . . . . . . –0.5V to VCC + 0.5V Operating Temperature Range . . . . . . . . . . . –40°C to 85°C Soldering Temperature . . . . . . . . . . . . . . . . . . 260°C for 10 seconds Storage Temperature . . . . . . . . . . . . . . . . . . . –55°C to 125°C Voltages measured with respect to ground. These are stress ratings only and functional operation is not implied. Electrical Characteristics Unless otherwise noted, VCC = 1.2V to 5.5V and specifications are over the operating temperature range of – 40°C to +85°C. All voltages are referenced to ground. Parameter Symbol Supply Voltage VCC Conditions Min Typ Output Voltage VOH IOUT < 500µA Output Current IOL Output = 0.4V, VCC ≥ 2.7V Operating Current ICC VCC < 5.5V, RESET output open 8 20 µA Operating Current ICC VCC ≤ 3.6V, RESET output open 6 15 µA 1.2 VCC – 0.5V Max Units 5.5 V VCC – 0.1V V +8 mA VCC Trip Point (IMP1233M-5) VCCTP 4.25 4.375 4.49 V VCC Trip Point (IMP1233M-55) VCCTP 4.5 4.625 4.75 V VCC Trip Point (IMP1233M-3) VCCTP 2.64 2.72 2.8 V Voltage High Trip Level IMP1233M-5 IMP1233M-55 VHTL 4.75 V Voltage Low Trip Level IMP1233M-5 IMP1233M-55 VLTL 4.00 V Voltage High Trip Level IMP1233M-3 VHTL 3.14 V Voltage Low Trip Level IMP1233M-3 VLTL 2.48 V Internal Pull-Up Resistor RP 7.5 kΩ 10 pF 10 µs Output Capacitance C OUT VCC Detect to RESET Low t RPD 3.5 5.0 2 VCC Slew Rate (VHTL - VLTL) tF 300 µs VCC Slew Rate (VLTL - VHTL) tR 0 ns VCC Detect to RESET High t RPU t R = 5µs 200 350 500 ms Notes: 1. A 1kΩ external resistor maybe required in some applications for proper operation of the microprocessor reset control circuit. © 1999 IMP, Inc. 408-432-9100/www.impweb.com 3 IMP1 233M Application Information Operation – Power Monitor The IMP1233M detects out-of-tolerance power supply conditions. It resets a processor during power-up and issues a reset to the system processor when the monitored power supply voltage is below the reset threshold (power-down). When an out-oftolerance VCC voltage is detected, the RESET signal is asserted. On power-up, RESET is kept active (LOW) for approximately 350ms after the power supply voltage has reached the selected tolerance. This allows the power supply and microprocessor to stabilize before RESET is released. tR VHTL VCCTP VLTL VCC tRPU VOH RESET 1233M_05.eps Figure 1. Timing Diagram: Power-Up tF VCC VHTL VCCTP VLTL tRPD RESET VOL 1233M_06.eps Figure 2. Timing Diagram: Power-Down 4 408-432-9100/www.impweb.com © 1999 IMP, Inc. P ac k ag e Inf or mation Package Dimensions Plastic SOT-23 (3-Pin) Inches B Millimeters Min E D a A A1 e1 Min Max Plastic SOT-23 (3-Pin) H e S Max C L SOT-23 (3-Pin).eps Plastic SOT-223 (4-Pin) B A A1 B C D E e e1 H L S 0.031 0.050 0.004 0.010 0.015 0.020 0.003 0.007 0.110 0.120 0.047 0.055 0.035 0.040 0.070 0.080 0.083 0.1039 0.027 REF 0.018 0.024 A A1 B B1 C D e e1 E h S t Q Q1 Q2 0.067 0.060 0.004 0.0008 0.124 0.116 0.033 0.026 0.014 0.010 0.264 0.248 0.0905 NOM 0.181 NOM 0.146 0.130 0.287 0.264 0.041 0.033 0.051 0.043 10° MAX 16° 10° 16° 10° A A1 B C e E H L D 0.053 0.004 0.013 0.007 0.80 1.27 0.10 0.25 0.37 0.51 0.085 0.18 2.80 3.04 1.20 1.40 0.89 1.03 1.78 2.05 2.10 2.64 0.069 REF 0.45 0.60 Plastic SOT-223** (4-Pin) E H e S Q1 D Q A B1 A1 Q2 e1 C SOT-223 (4-Pin).eps Plastic SO-8 (8-Pin) 0°– 8° L E C A e A1 SO (8-Pin).eps TO-92 (3-Pin) B L M Section A-A C D J Section A-A F K E G 1 H © 1999 IMP, Inc. 2 3 I 2.30 NOM 4.50 NOM 3.70 7.30 1.05 1.30 3.30 6.70 0.85 1.10 10° MAX 16° 16° 10° 10° 0.069 0.010 0.020 0.010 1.35 0.10 0.33 0.19 0.157 0.244 0.050 0.197 3.80 5.80 0.40 4.80 0.050 0.150 0.228 0.016 0.189 1.75 0.25 0.51 0.25 1.27 4.00 6.20 1.27 2.00 TO-92* (3-Pin) A D 1.50 0.02 2.95 0.65 0.25 6.30 Plastic SO-8 (8-Pin) H D B 1.70 0.10 3.15 0.85 0.35 6.70 Bottom View TO-92.eps A 0.175 0.195 4.45 4.95 B 0.170 0.192 4.32 4.96 C 0.500 0.610 12.70 15.49 D 0.016 0.022 0.406 0.559 E 0.095 0.105 2.41 2.67 F 0.045 0.60 1.14 1.52 G 0.45 0.060 1.14 1.52 H 0.085 0.095 2.16 2.41 I 0.130 0.155 3.30 3.94 J 0.014 0.020 0.35 0.51 K 0.093 0.115 2.36 2.92 L 45° 60° 45° 60° M 0.118 Typical 3.00 * Formed leads are standard. Add /S to Part Number for straight leads. ** Add /T to Part Number for Tape and Reel. 18xx_t01.eps 408-432-9100/www.impweb.com IMP, Inc. Corporate Headquarters 2830 N. First Street San Jose, CA 95134-2071 Tel: 408-432-9100 Tel: 800-438-3722 Fax: 408-434-0335 Fax-on-Demand: 1-800-249-1614 (USA) Fax-on-Demand: 1-303-575-6156 (International) e-mail: [email protected] http://www.impweb.com The IMP logo is a registered trademark of IMP, Inc. All other company and product names are trademarks of their respective owners. © 1999 IMP, Inc. Printed in USA Publication #: 1002 Revision: A Issue Date: 06/15/99 Type: Preliminary