INTEGRATED CIRCUITS MAX6326/MAX6327/MAX6328/ MAX6346/MAX6347/MAX6348 3-pin ultra-low power SC70/SOT microprocessor reset circuit Product data Supersedes data of 2003 Apr 30 2003 Aug 05 Philips Semiconductors Product data 3-pin ultra-low power SC70/SOT microprocessor reset circuit MAX632x/MAX634x DESCRIPTION FEATURES • Ultra-low 1 µA (max) supply current • Precision monitoring of 2.5 V, 3 V, 3.3 V, and 5 V power supply The MAX6326/MAX6327//MAX6328/MAX6346/MAX6347/MAX6348 microprocessor (µP) reset circuits monitor power supplies in µP and digital systems. These devices eliminate external components and adjustments while providing excellent circuit reliability and low cost solution. They are used to monitor 2.5 V, 3 V, 3.3 V and 5 V power supplies. voltages • Reset thresholds available from 2.2 V to 4.63 V • Fully specified over temperature –40 °C to +85 °C • 100 ms (min) power-on-reset delay time • Power transient immunity • Available in three versions: Push-Pull RESET, Push-Pull RESET, They assert a reset signal when the VDD supply voltage falls below a preset reset threshold voltage. The reset signal remains asserted for at least 100 ms after the VDD rises above the reset threshold. The reset threshold are factory trimmable from 2.2 V to 4.63 V in approximately 100 mV increments. All these parts are guaranteed to assert a reset for VDD down to 1 V. They have excellent immunity to fast transients on VDD. and Open-Drain RESET • Pin compatible with MAX803/MAX809/MAX810 • Small, low cost, 3-pin SC70/SOT23 packages The devices vary in their output configuration. The MAX6326/MAX6346 have push-pull, active-LOW reset output; while the MAX6328/MAX6348 have open drain, active-LOW reset output. The MAX6327/MAX6347 have push-pull, active HIGH reset output. APPLICATIONS The lower threshold MAX6326/MAX6327/MAX6328 have ultra-low supply current of typically 0.5 µA making them ideal for battery powered applications. All six devices are available in both the 3-pin SOT23 and SC70 packages. • Computers and controllers • Power monitoring • Portable/battery powered equipment • Industrial equipment SIMPLIFIED SYSTEM DIAGRAM VDD VDD VDD RPU RESET RESET MAX6328/ MAX6348 MOTOROLA 68HCXX GND GND SL01835 Figure 1. MAX6328/6348 simplified system diagram. 2003 Aug 05 2 Philips Semiconductors Product data 3-pin ultra-low power SC70/SOT microprocessor reset circuit MAX632x/MAX634x ORDERING INFORMATION MAX632x TYPE NUMBER PACKAGE NAME DESCRIPTION TEMPERATURE RANGE RESET MAX6326-XXD SOT23-3 Plastic small outline package; 3 leads; body width 1.5 mm –40 °C to +85 °C push-pull Active-LOW reset output MAX6326-XXW SC70-3 Plastic small outline package; 3 leads; body width 1.15 mm –40 °C to +85 °C push-pull Active-LOW reset output MAX6327-XXD SOT23-3 Plastic small outline package; 3 leads; body width 1.5 mm –40 °C to +85 °C push-pull Active-HIGH reset output MAX6327-XXW SC70-3 Plastic small outline package; 3 leads; body width 1.15 mm –40 °C to +85 °C push-pull Active-HIGH reset output MAX6328-XXD SOT23-3 Plastic small outline package; 3 leads; body width 1.5 mm –40 °C to +85 °C open-drain Active-LOW reset output MAX6328-XXW SC70-3 Plastic small outline package; 3 leads; body width 1.15 mm –40 °C to +85 °C open-drain Active-LOW reset output NOTE: The device has five standard voltage output options, indicated by the XX on the “Type Number”. Additional voltage output options may be available (see Table 1). XX (type number suffix) Voltage (Typical) 22 2.2 V 23 2.3 V 26 2.6 V 29 2.9 V 31 3.1 V MAX634x TYPE NUMBER PACKAGE NAME DESCRIPTION TEMPERATURE RANGE RESET MAX6346-XXD SOT23-3 Plastic small outline package; 3 leads; body width 1.5 mm –40 °C to +85 °C push-pull Active-LOW reset output MAX6346-XXW SC70-3 Plastic small outline package; 3 leads; body width 1.15 mm –40 °C to +85 °C push-pull Active-LOW reset output MAX6347-XXD SOT23-3 Plastic small outline package; 3 leads; body width 1.5 mm –40 °C to +85 °C push-pull Active-HIGH reset output MAX6347-XXW SC70-3 Plastic small outline package; 3 leads; body width 1.15 mm –40 °C to +85 °C push-pull Active-HIGH reset output MAX6348-XXD SOT23-3 Plastic small outline package; 3 leads; body width 1.5 mm –40 °C to +85 °C open-drain Active-LOW reset output MAX6348-XXW SC70-3 Plastic small outline package; 3 leads; body width 1.15 mm –40 °C to +85 °C open-drain Active-LOW reset output NOTE: The device has two standard voltage output options, indicated by the XX on the “Type Number”. Additional voltage output options may be available (see Table 1). XX (type number suffix) Voltage (Typical) 44 4.4 V 46 4.6 V 2003 Aug 05 3 Philips Semiconductors Product data 3-pin ultra-low power SC70/SOT microprocessor reset circuit MAX632x/MAX634x PINNING MAX6326/MAX6346, MAX6328/MAX6348 pin description GND 1 PIN MAX632x/ MAX634x RESET or RESET 3 VDD SYMBOL 1 GND Device ground 2 RESET Active-LOW Reset Output. RESET remains LOW while VDD is below the reset threshold and for a reset delay time of at least 100 ms after VDD rises above the reset threshold. MAX6328/MAX6348 have open-drain output and the MAX6326/MAX6346 are Push-Pull output. 3 VDD Positive supply voltage 2 SL01839 Figure 2. Pin configuration. DESCRIPTION MAX6327/MAX6347 pin description PIN SYMBOL DESCRIPTION 1 GND Device ground 2 RESET Active-HIGH Reset Output. RESET remains high while VDD is below the reset threshold and remains HIGH for at least 100 ms after VDD rises above the reset threshold. 3 VDD Positive supply voltage MAXIMUM RATINGS SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT VDD Supply voltage –0.3 6.0 V Vi(RESET) Input voltage at RESET pin (MAX6326/MAX6346, MAX6328/MAX6348) –0.3 6.0 V Ii(VDD) Input current at VDD pin – 20 mA Io Output current (RESET pin) – 20 mA P Power dissipation – 320 mW – 174 Topr Operating temperature –40 +85 °C Tstg Storage temperature –65 +150 °C 3-pin SOT23 (derate 4 mW/°C above Tamb = 70 °C) 3-pin SC70 (derate 2.7 mW/°C above Tamb = 70 °C) 2003 Aug 05 4 Philips Semiconductors Product data 3-pin ultra-low power SC70/SOT microprocessor reset circuit MAX632x/MAX634x ELECTRICAL CHARACTERISTICS VDD = full range (Tamb = –40 °C to +85 °C) unless otherwise noted; typical values are at Tamb = +25 °C, and VDD = 3 V (Note 1). SYMBOL PARAMETER VDD range IDD Vth Supply current Reset threshold (Table 1) MAX UNIT Tamb = 0 °C to +70 °C CONDITIONS MIN 1.0 TYP 5.5 V Tamb = –40 °C to +85 °C 1.2 5.5 V MAX632x only, VDD = 3.0 V for Vth ≤ 2.93 V, VDD = 3.2 V for Vth > 2.93 V, no load – 0.5 1.0 µA VDD = 5.5 V, no load – 1.0 1.75 µA Tamb = +25 °C Vth – 1.5% Vth Vth + 1.5% V Tamb = –40 °C to +85 °C Vth – 2.5% Vth Vth + 2.5% V – 40 – ppm/°C – 20 – µs 100 185 280 ms – 0.3 V ∆Vth/°C Reset threshold temperature coefficient tRD VCC to Reset release delay tRP Reset active timeout period VOL(RESET) RESET output voltage (reset asserted) ISINK = 1.6 mA, VDD > 2.1 V – 0.4 V VOH(RESET) RESET output voltage (reset released) ISOURCE = 500 mA, VDD = 3.2 V, MAX6326 only 0.8 × VCC – V ISOURCE = 800 µA, VDD = 4.5 V, Vth ≤ 4.38 V 0.8 × VCC – V ISOURCE = 800 µA, VDD = Vth(MAX), Vth ≥ 4.5 V 0.8 × VCC – V ISOURCE = 500 µA, VDD ≥ 2.1 V 0.8 × VCC – V ISOURCE = 50 µA, VDD ≥ 1.2 V 0.8 × VCC – V ISINK = 1.2 mA, VDD ≥ 3.2 V (MAX6327 only) – 0.3 V ISINK = 3.2 mA, VDD ≥ 3.2 V, Vth ≤ 4.38 V – 0.4 V ISINK = 3.2 mA, VDD = Vth(MAX), Vth ≥ 4.5 V – 0.4 V MAX6326/MAX6327/MAX6328 – 6.3 – mV MAX6346/MAX6347/MAX6348 – 9.5 – mV 0.1 µA VOH(RESET) RESET output voltage ((reset asserted)) (MAX6327/MAX6347) VOL(RESET) RESET output voltage (reset released) (MAX6327/MAX6347) Vhys RESET threshold hysteresis VDD = Vth to (Vth – 100 mV) ISINK = 100 mA, VDD ≥ 1.2 V Open-drain RESET output leakage current – NOTE: 1. Over-temperature limits are guaranteed by design and are not production tested. 2003 Aug 05 5 Philips Semiconductors Product data 3-pin ultra-low power SC70/SOT microprocessor reset circuit MAX632x/MAX634x Table 1. Factory-trimmed Reset Thresholds (Note 1) PART SUFFIX (XX) RESET THRESHOLD VOLTAGE, Vth (V) Tamb = +25 °C Tamb = –40 °C to +85 °C MIN TYP MAX MIN MAX MAX632x-XX 22 2.167 2.200 2.233 2.145 2.250 MAX632x-XX 23 2.285 2.320 2.355 2.262 2.375 MAX632x-XX 24 (Note 2) 2.364 2.400 2.436 2.340 2.460 MAX632x-XX 25 (Note 2) 2.462 2.500 2.537 2.437 2.562 MAX632x-XX 26 2.591 2.630 2.669 2.564 2.696 MAX632x-XX 27 (Note 2) 2.660 2.700 2.741 2.633 2.768 MAX632x-XX 28 (Note 2) 2.758 2.800 2.842 2.730 2.870 MAX632x-XX 29 2.886 2.930 2.974 2.857 3.000 MAX632x-XX 30 (Note 2) 2.955 3.000 3.045 2.925 3.075 MAX632x-XX 31 3.034 3.080 3.126 3.003 3.150 MAX634x-XX 33 (Note 2) 3.250 3.300 3.350 3.217 3.383 MAX634x-XX 34 (Note 2) 3.349 3.400 3.451 3.315 3.485 MAX634x-XX 35 (Note 2) 3.447 3.500 3.552 3.412 3.587 MAX634x-XX 36 (Note 2) 3.546 3.600 3.654 3.510 3.690 MAX634x-XX 37 (Note 2) 3.644 3.700 3.755 3.607 3.792 MAX634x-XX 38 (Note 2) 3.743 3.800 3.857 3.705 3.895 MAX634x-XX 39 (Note 2) 3.841 3.900 3.958 3.802 3.997 MAX634x-XX 40 (Note 2) 3.940 4.000 4.060 3.900 4.100 MAX634x-XX 41 (Note 2) 4.038 4.100 4.161 3.997 4.202 MAX634x-XX 42 (Note 2) 4.137 4.200 4.263 4.095 4.305 MAX634x-XX 43 (Note 2) 4.235 4.300 4.364 4.192 4.407 MAX634x-XX 44 4.314 4.380 4.446 4.270 4.489 MAX634x-XX 45 (Note 2) 4.432 4.500 4.567 4.387 4.612 MAX634x-XX 46 4.560 4.630 4.699 4.514 4.746 NOTES: 1. Factory-trimmed reset thresholds are available in 100 mV increments with ±1.5% tolerance at room temperature. 2. Consult factory for availability. 2003 Aug 05 6 Philips Semiconductors Product data 3-pin ultra-low power SC70/SOT microprocessor reset circuit MAX632x/MAX634x TYPICAL PERFORMANCE CURVES MAX6326 45 OUTPUT SOURCE CURRENT, I SOURCE (mA) OUTPUT SINK CURRENT, I SINK (mA) 12 10 8 VDD = 1.2 V 6 4 2 0 0 0.2 0.4 0.6 0.8 40 35 30 VDD = 1.2 V 25 20 15 10 5 0 1.0 0 RESET OUTPUT VOLTAGE LOW, VOL(RESET) (V) 1 2 3 SL01831 SL01833 Figure 3. Output sink current vs. RESET output voltage low. Figure 5. Output sink current vs. RESET output voltage high. 70 OUTPUT SOURCE CURRENT, I SOURCE (mA) 50 OUTPUT SINK CURRENT, I SINK (mA) 4 RESET OUTPUT VOLTAGE HIGH, VOH (RESET) (V) 45 40 35 30 VDD = 2.1 V 25 20 15 10 5 0 0 0.5 1.0 1.5 2.0 2.5 50 VDD = 2.1 V 40 30 20 10 0 0 RESET OUTPUT VOLTAGE LOW, VOL(RESET) (V) 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 RESET OUTPUT VOLTAGE HIGH, VOH (RESET) (V) SL01832 SL01834 Figure 4. Output sink current vs. RESET output voltage low. 2003 Aug 05 60 Figure 6. Output sink current vs. RESET output voltage high. 7 Philips Semiconductors Product data 3-pin ultra-low power SC70/SOT microprocessor reset circuit MAX632x/MAX634x APPLICATION INFORMATION Interfacing to µPs with Bidirectional Reset Pins System configurations with various µPs The MAX6328/MAX6348 RESET output is open drain and are easily interfaced with microprocessors which have bidirectional reset pins, such as the Motorola 68HC11. Directly connecting the MAX6328/MAX6348 RESET output to the µPs reset input and providing a pull-up resistor to VDD allows either device to independently assert reset (Figure 7). The MAX326-MAX6348 Series resets provide a system solution for various µPs. Figures 9 and 10, respectively, reference the Philips µPs which are compatible with the MAX6326/MAX6346 and MAX6327/MAX6347 system resets. VDD VDD VDD VDD VDD VDD RPU RESET RESET RESET RESET MAX6328/ MAX6348 MOTOROLA 68HCXX GND GND µP(Note 1) MAX6326/ MAX6346 GND GND SL01837 SL01835 NOTE: 1. Philips microprocessors with active-LOW resets: All 16-bit devices from XA-family (XA-Cxx, XA-Gxx, XA-Sxx, XA-Hxx), all LPC7xx devices (P87LPC760/761/762/767/768/769, P80C591/P87C591 (with on-chip CAN controller). Figure 9. µP System Diagram using MAX6326/MAX6328 Push-Pull, Active-LOW Resets Figure 7. Interfacing to µPs with Bidirectional Reset Pins Negative-going VDD transients The MAX6326-MAX6348 Series resets are relatively immune to short duration, negative-going VDD transients or power glitches. This capability greatly reduces false resets with short-duration pulses. VDD Figure 8, Maximum Transient Duration versus Reset Comparator Overdrive, shows the maximum transient condition for which reset signal are not generated. The graph shows the maximum pulse width that a negative-going transient may have before it will generate a reset signal. Note: as the amplitude of the transient increases, the maximum allowable transient pulse width decreases. VDD VDD RESET MAXIMUM TRANSIENT DURATION (µ s) 450 MAX6327/ MAX6347 400 RESET µP(Note 1) 350 300 GND GND 250 200 MAX6346/MAX6347/ MAX6348 150 SL01838 NOTE: 1. Philips microprocessors with active-HIGH resets : 8xC5x, 8xC3x, 8xC5xX2, 8xC3xX2, 8xC51Fx, 8xC51Rx+, 89C51Rx2, 89C66x, 8xC554, 8xC552, etc. Figure 10. µP System Diagram using MAX6327/MAX6347 Push-Pull, Active-HIGH Resets 100 MAX6326/MAX6327/ MAX6328 50 0 1 10 100 1000 RESET COMPARATOR OVERDRIVE, Vth – VCC (mV) SL01836 Figure 8. Maximum transient duration without causing a reset pulse versus reset comparator overdrive. 2003 Aug 05 8 Philips Semiconductors Product data 3-pin ultra-low power SC70/SOT microprocessor reset circuit MAX632x/MAX634x PACKING METHOD GUARD BAND TAPE REEL ASSEMBLY TAPE DETAIL COVER TAPE CARRIER TAPE BARCODE LABEL BOX SL01305 Figure 11. Tape and reel packing method. 2003 Aug 05 9 Philips Semiconductors Product data 3-pin ultra-low power SC70/SOT microprocessor reset circuit MAX632x/MAX634x SOT23-3: plastic small outline package; 3 leads; body width 1.5 mm 3 1 1.35 2003 Aug 05 0.15 0.05 2 1.2 1.0 0.025 0.55 0.41 0.22 0.08 3.00 2.70 1.70 1.50 0.55 0.35 10 Philips Semiconductors Product data 3-pin ultra-low power SC70/SOT microprocessor reset circuit MAX632x/MAX634x SC70-3: plastic small outline package; 3 leads; body width 1.15 mm 1.0 0.8 2003 Aug 05 0.4 0.25 0.225 0.10 2.1 1.9 0.4 0.1 11 Philips Semiconductors Product data 3-pin ultra-low power SC70/SOT microprocessor reset circuit MAX632x/MAX634x REVISION HISTORY Rev Date Description _2 20030805 Product data (9397 750 11124). ECN 853-2423 30165 dated 30 July 2003. Supersedes data of 30 Arpil 2003 (9397 750 10686). Modifications: • Table 1 on page 6, last row of table (suffix 46): Vth at Tamb = –40 to +85 °C: change from 4.3514 to 4.514 V. _1 20030430 Product data (9397 750 10686). ECN 853-2423 29823 of 15 April 2003. 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]. 2003 Aug 05 Document order number: 12 9397 750 11124