INTEGRATED CIRCUITS MAX809/MAX810 3-pin microprocessor resets Product data Supersedes data of 2002 Oct 21 2003 Aug 08 Philips Semiconductors Product data 3-pin microprocessor resets MAX809/MAX810 DESCRIPTION FEATURES • Monitors 5.0 V, 3.3 V and 3 V supplies • 140 ms min. reset delay time: The MAX809/MAX810 are single function microprocessor resets used to monitor supply voltages in microprocessor and other logic systems. They provide a reset signal to the microprocessor during power-up, power-down, and brownout conditions. The reset signal is asserted when the supply voltage drops below the preset threshold, and the signal is released a set time after the supply voltage has risen above the preset threshold. – Active-LOW RESET output (MAX809) – Active-HIGH RESET output (MAX810) • Power supply transient immunity • Guaranteed reset valid for 1.1 V • Available in small SOT23 and SC70 3-pin packages • No external components needed • Specified over full temperature range –40 °C to +105 °C The MAX809 has an active-LOW reset output while the MAX810 has an active-HIGH reset output. The low supply current of typically 17 µA makes the MAX809/MAX810 ideal for use in portable, battery operated equipment. They are available in the 3-pin SOT23 and SC70 packages. APPLICATIONS • Embedded controllers • Battery operated systems • Wireless communication systems • PDAs and handheld equipment SIMPLIFIED SYSTEM DIAGRAMS VCC VCC VCC VCC VCC VCC MAX809 MICROPROCESSOR MAX810 MICROPROCESSOR RESET GND RESET RESET INPUT GND GND SL01642 GND SL01643 Figure 1. MAX809 simplified system diagram. 2003 Aug 08 RESET INPUT Figure 2. MAX810 simplified system diagram. 2 Philips Semiconductors Product data 3-pin microprocessor resets MAX809/MAX810 ORDERING INFORMATION PACKAGE NAME DESCRIPTION TEMPERATURE RANGE MAX809xD SOT23-3 plastic small outline package; 3 leads (see dimensional drawing) –40 to +105 °C MAX810xD SOT23-3 plastic small outline package; 3 leads (see dimensional drawing) –40 to +105 °C MAX809xW SC70-3 plastic small outline package; 3 leads; body width 1.15 mm –40 to +105 °C MAX810xW SC70-3 plastic small outline package; 3 leads; body width 1.15 mm –40 to +105 °C TYPE NUMBER NOTE: Each device has 7 voltage options, indicated by the ‘x’ on the ‘Type number’. Part number Reset Threshold Voltage (Typical) Part number MAX809 Reset Threshold Voltage (Typical) MAX810 MAX809ZD, MAX809ZW 2.32 V MAX810ZD, MAX810ZW 2.32 V MAX809RD, MAX809RW 2.63 V MAX810RD, MAX810RW 2.63 V MAX809SD, MAX809SW 2.93 V MAX810SD, MAX810SW 2.93 V MAX809TD, MAX809TW 3.08 V MAX810TD, MAX810TW 3.08 V MAX809JD, MAX809JW 4.00 V MAX810JD, MAX810JW 4.00 V MAX809MD, MAX809MW 4.38 V MAX810MD, MAX810MW 4.38 V MAX809LD, MAX809LW 4.63 V MAX810LD, MAX810LW 4.63 V Marking code Each device is marked with a four letter code. The first three letters designate the product. The fourth, represented by an ‘x’, designates the date tracking code. Part Marking Part MAX809 Marking MAX810 MAX809JD AMUx MAX810LD ANTx MAX809LD AMVx MAX810RD ANUx MAX809MD AMWx MAX810SD ANVx MAX809RD, W AMXx MAX810JD ANWx MAX809SD AMYx MAX810MD ANXx MAX809TD AMZx MAX810TD ANYx MAX809ZD AMAx MAX810ZD ANZx 2003 Aug 08 3 Philips Semiconductors Product data 3-pin microprocessor resets MAX809/MAX810 PINNING GND 1 GND MAX809 RESET 3 1 VCC MAX810 2 RESET SL01644 Figure 3. MAX809 pin configuration. Figure 4. MAX810 pin configuration. MAX809 pin description SYMBOL VCC 2 SL01641 PIN 3 MAX810 pin description DESCRIPTION PIN SYMBOL DESCRIPTION 1 GND Device ground. 1 GND Device ground. 2 RESET Active-LOW reset signal. 2 RESET Active-HIGH reset signal. 3 VCC Supply voltage input. 3 VCC Supply voltage input. MAXIMUM RATINGS SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT VCC Supply voltage –0.3 6.0 V Vi(RESET) Input voltage at RESET pin (MAX809) –0.3 VCC + 0.3 V Vi(RESET) Input voltage at RESET pin (MAX810) –0.3 VCC + 0.3 V Ii(VCC) Input current at VCC pin – 20 mA Io Output current – 20 mA Rate of rise at VCC – 100 V/µs Tamb Ambient temperature –40 +105 °C Tstg Storage temperature –65 +150 °C P Power dissipation – 320 mW 2003 Aug 08 Derate 4 mW/°C above Tamb = 70 °C 4 Philips Semiconductors Product data 3-pin microprocessor resets MAX809/MAX810 ELECTRICAL CHARACTERISTICS VCC = full range (Tamb = –40 °C to +105 °C) unless otherwise noted; typical values are at Tamb = +25 °C, and VCC = 5 V (J/L/M versions), VCC = 3.3 V (T/S versions), VCC = 3 V (R version), and VCC = 2.5 V (Z version) (Note 1). SYMBOL PARAMETER VCC range ICC ICC Vth Supply current (SOT23-3) Supply current (SC70-3) RESET threshold voltage (SOT23 3 and (SOT23-3 d SC70 SC70-3) 3) MIN. TYP. MAX. UNIT Tamb = 0 °C to +70 °C CONDITIONS 1.0 – 5.5 V Tamb = –40 °C to +105 °C 1.2 – 5.5 V MAX809J/L/M MAX810J/L/M VCC < 5.5 V; Tamb = –40 °C to +85 °C – 24 60 µA MAX809R/S/T/Z MAX810R/S/T/Z VCC < 3.6 V; Tamb = –40 °C to +85 °C – 17 50 µA MAX809J/L/M MAX810J/L/M VCC < 5.5 V; Tamb = +85 °C to +105 °C – – 100 µA MAX809R/S/T/Z MAX810R/S/T/Z VCC < 3.6 V; Tamb = +85 °C to +105 °C – – 100 µA MAX809J/L/M MAX810J/L/M VCC < 5.5 V; Tamb = –40 °C to +85 °C – 24 35 µA MAX809R/S/T/Z MAX810R/S/T/Z VCC < 3.6 V; Tamb = –40 °C to +85 °C – 17 30 µA MAX809J/L/M MAX810J/L/M VCC < 5.5 V; Tamb = +85 °C to +105 °C – – 60 µA MAX809R/S/T/Z MAX810R/S/T/Z VCC < 3.6 V; Tamb = +85 °C to +105 °C – – 60 µA MAX809Z MAX810Z Tamb = +25 °C 2.28 2.32 2.35 V Tamb = –40 °C to +85 °C 2.25 – 2.38 V Tamb = +85 °C to +105 °C 2.22 – 2.42 V Tamb = +25 °C 2.59 2.63 2.66 V Tamb = –40 °C to +85 °C 2.55 – 2.70 V Tamb = +85 °C to +105 °C 2.50 – 2.76 V Tamb = +25 °C 2.89 2.93 2.96 V Tamb = –40 °C to +85 °C 2.85 – 3.00 V Tamb = +85 °C to +105 °C 2.78 – 3.08 V Tamb = +25 °C 3.04 3.08 3.11 V Tamb = –40 °C to +85 °C 3.00 – 3.15 V Tamb = +85 °C to +105 °C 2.92 – 3.23 V Tamb = +25 °C 3.93 4.00 4.06 V Tamb = –40 °C to +85 °C 3.89 – 4.10 V Tamb = +85 °C to +105 °C 3.80 – 4.20 V Tamb = +25 °C 4.31 4.38 4.45 V Tamb = –40 °C to +85 °C 4.25 – 4.50 V Tamb = +85 °C to +105 °C 4.16 – 4.56 V Tamb = +25 °C 4.56 4.63 4.70 V Tamb = –40 °C to +85 °C 4.50 – 4.75 V Tamb = +85 °C to +105 °C 4.40 – 4.86 V – 30 – ppm/°C MAX809R MAX810R MAX809S MAX810S MAX809T MAX810T MAX809J MAX810J MAX809M MAX810M MAX809L MAX810L Reset threshold temperature coefficient 2003 Aug 08 VCC to RESET delay VCC = Vth to (Vth – 100 mV) – 20 – µs RESET active time-out period (SOT23 3) (SOT23-3) Tamb = –40 °C to +85 °C 140 240 560 ms Tamb = +85 °C to +105 °C 100 – 840 ms RESET active time-out period (SC70 3) (SC70-3) Tamb = –40 °C to +85 °C 140 240 460 ms Tamb = +85 °C to +105 °C 100 – 840 ms 5 Philips Semiconductors Product data 3-pin microprocessor resets SYMBOL PARAMETER MAX809/MAX810 CONDITIONS MIN. TYP. MAX. UNIT MAX809R/S/T/Z VCC > Vth(min); Isink = 1.2 mA – – 0.3 V MAX809J/L/M VCC > Vth(min); Isink = 3.2 mA – – 0.4 V MAX809 VCC > 1.0 V; Isink = 50 µA – – 0.3 V HIGH-level output voltage on RESET pin i MAX809R/S/T/Z VCC > Vth(max); Isource = 500 µA 0.8 × VCC – – V MAX809J/L/M VCC > Vth(max); Isource = 800 µA VCC – 1.5 – – V VOL(RESET) ( ) LOW-level output voltage on RESET pin i MAX810R/S/T/Z VCC > Vth(max); Isink = 1.2 mA – – 0.3 V MAX810J/L/M VCC > Vth(max); Isink = 3.2 mA – – 0.4 V VOH(RESET) HIGH-level output voltage on RESET pin MAX810 1.8 V < VCC > Vth(min); Isource = 150 µA 0.8 × VCC – – V VOL(RESET) ( ) VOH(RESET) ( ) LOW-level output voltage i on RESET pin NOTES: 1. Production testing done at Tamb = +25 °C; limits over temperature guaranteed by design. 2. RESET output for MAX809; RESET output for MAX810. 2003 Aug 08 6 Philips Semiconductors Product data 3-pin microprocessor resets MAX809/MAX810 APPLICATION INFORMATION relatively large resistor from RESET to ground as shown in Figure 6. 100 kΩ is small enough to provide a path for any leakage currents to flow to ground (holding RESET LOW); while it is large enough not to load RESET. Conversely, a 100 kΩ pull-up resistor is recommended for MAX810 if RESET is required to remain valid for VCC < 1 V. Detailed description A microprocessor reset ensures that the microprocessor starts in a known and safe state. The reset asserts a reset signal to prevent code execution errors during power up, power down, or brownout conditions. A reset must assert an output within a predictable range of the supply voltage. The common threshold voltage range is between 5% and 10% of the nominal supply voltage. MAX809/MAX810 have 4.63 V, 3.08 V and 2.63 V options for 5 V, 3.3 V and 3.0 V supplies respectively. They have high accuracy (within ±3%) that ensures that the reset thresholds occur within the safe operating range. Whenever the supply voltage falls below the reset threshold, the reset signal is asserted. It remains asserted for at least 140 ms after the supply voltage rises above the threshold. At this point the reset is released. This delay time helps ensure valid reset signals despite erratic changes in supply voltage. The MAX809/MAX810 have a push-pull output stage and do not require a pull-up resistor. VCC VCC RESET MAX809 Negative-going VCC transients RESET 100 kΩ MICROPROCESSOR GND The MAX809/MAX810 are relatively immune to short negative-going VCC transients and glitches. Figure 5 shows the maximum pulse width a negative-going transient can have without causing a reset signal. As the magnitude of the transient increases below the reset threshold, the maximum allowable pulse width decreases. Typically, for the 4.0 V, 4.38 V, and 4.63 V versions of the MAX809/MAX810, a VCC transient that goes 100 mV below the reset threshold and lasts 20 µs or less will not cause a reset signal. To provide additional transient rejection, connect a 10 nF bypass capacitor as close as possible to the VCC pin. GND SL01726 Figure 6. RESET valid to VCC = 0 V circuit. Interfacing to microprocessors with bi-directional reset pins Microprocessors with bi-directional reset I/Os, such as the Motorola 68HC11 series, can be connected to the MAX809 RESET output. To ensure a correct output on the MAX809, even when the microprocessor reset I/O is in the opposite state, connect a 4.7 kΩ resistor between the reset pins as shown in Figure 7. This allows the microprocessor to issue commands to the system regardless of the state of the RESET. The bi-directional microprocessor reset functions both as a driven reset input and as an active reset driver. 450 MAXIMUM TRANSIENT DURATION (µ s) VCC 400 350 300 250 200 VCC MAX809/MAX810J/L/M 150 100 MAX809/ MAX810R/S/T/Z 50 VCC VCC 0 1 10 100 1000 4.7 kΩ RESET RESET COMPARATOR OVERDRIVE, Vth – VCC (mV) SL01728 MAX809 Figure 5. Maximum transient duration without causing a reset pulse versus reset comparator overdrive. GND RESET MOTOROLA 68HCxx GND Ensuring a valid reset output down to VCC = 0 V When VCC falls below 1 V, the MAX809 RESET no longer sinks current (i.e., it becomes open circuit). A high impedance CMOS logic input connected to RESET can drift to undetermined voltages. In most applications in which the microprocessor circuitry is inoperative below 1 V, this will not represent a problem. However, in applications in which RESET must be valid down to 0 V, use a 2003 Aug 08 SL01727 Figure 7. Interfacing to microprocessor with bi-directional reset I/O 7 Philips Semiconductors Product data 3-pin microprocessor resets MAX809/MAX810 PACKING METHOD The MAX809 and MAX810 are packed in reels, as shown in Figure 8. GUAR D BAND TAPE REEL ASSEMBLY TAPE DETAIL COVER TAPE CARRIER TAPE BARCODE LABEL BOX SL01305 Figure 8. Tape and reel packing method. 2003 Aug 08 8 Philips Semiconductors Product data 3-pin microprocessor resets MAX809/MAX810 SOT23-3: plastic small outline package; 3 leads; body width 1.5 mm 3 1 1.35 2003 Aug 08 0.15 0.05 2 1.2 1.0 0.25 0.50 0.25 0.22 0.08 3.00 2.70 1.70 1.50 0.55 0.35 9 10° 0° Philips Semiconductors Product data 3-pin microprocessor resets MAX809/MAX810 SC70-3: plastic small outline package; 3 leads; body width 1.15 mm 1.0 0.8 2003 Aug 08 0.4 0.25 0.225 0.10 2.1 1.9 0.4 0.1 10 Philips Semiconductors Product data 3-pin microprocessor resets MAX809/MAX810 REVISION HISTORY Rev Date Description _3 20030808 Product data (9397 750 11889); ECN 853–2355 30184 dated 04 August 2003. Supersedes MAX809_MAX810_2 of 2002 Oct 21 (9397 750 10584). Modifications: • Add ‘Marking code’ table to Ordering information on page 3. • SOT23–3 package outline on page 9 corrected. _2 20021021 Product data (9397 750 10584); ECN 853–2355 29047 dated 14 October 2002. Supersedes MAX809_MAX810_1 of 2002 June 20 (9397 750 10213). _1 20020620 Product data (9397 750 10213); ECN 853–2355 28505 dated 20 June 2002. 2003 Aug 08 11 Philips Semiconductors Product data 3-pin microprocessor resets MAX809/MAX810 Data sheet status Level Data sheet status [1] Product status [2] [3] Definitions I Objective data Development This data sheet contains data from the objective specification for product development. Philips Semiconductors reserves the right to change the specification in any manner without notice. II Preliminary data Qualification This data sheet contains data from the preliminary specification. Supplementary data will be published at a later date. Philips Semiconductors reserves the right to change the specification without notice, in order to improve the design and supply the best possible product. III Product data Production This data sheet contains data from the product specification. Philips Semiconductors reserves the right to make changes at any time in order to improve the design, manufacturing and supply. Relevant changes will be communicated via a Customer Product/Process Change Notification (CPCN). [1] Please consult the most recently issued data sheet before initiating or completing a design. [2] The product status of the device(s) described in this data sheet may have changed since this data sheet was published. The latest information is available on the Internet at URL http://www.semiconductors.philips.com. [3] For data sheets describing multiple type numbers, the highest-level product status determines the data sheet status. Definitions Short-form specification — The data in a short-form specification is extracted from a full data sheet with the same type number and title. For detailed information see the relevant data sheet or data handbook. Limiting values definition — Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 60134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability. Application information — Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or modification. Disclaimers Life support — These products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips Semiconductors customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application. Right to make changes — Philips Semiconductors reserves the right to make changes in the products—including circuits, standard cells, and/or software—described or contained herein in order to improve design and/or performance. When the product is in full production (status ‘Production’), relevant changes will be communicated via a Customer Product/Process Change Notification (CPCN). Philips Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless otherwise specified. Koninklijke Philips Electronics N.V. 2003 All rights reserved. Printed in U.S.A. Contact information For additional information please visit http://www.semiconductors.philips.com. Fax: +31 40 27 24825 Date of release: 08-03 For sales offices addresses send e-mail to: [email protected]. Document order number: 2003 Aug 08 12 9397 750 11889