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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
Philips Semiconductors
Product data
3-pin ultra-low power SC70/SOT microprocessor reset circuit
MAX632x/MAX634x
DESCRIPTION
The MAX6326/MAX6327//MAX6328/MAX6346/MAX6347/MAX6348 microprocessor (P) reset circuits monitor power supplies in P 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. 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. 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. The lower threshold MAX6326/MAX6327/MAX6328 have ultra-low supply current of typically 0.5 A making them ideal for battery powered applications. All six devices are available in both the 3-pin SOT23 and SC70 packages.
FEATURES
* Ultra-low 1 A (max) supply current * Precision monitoring of 2.5 V, 3 V, 3.3 V, and 5 V power supply
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,
and Open-Drain RESET
* Pin compatible with MAX803/MAX809/MAX810 * Small, low cost, 3-pin SC70/SOT23 packages
APPLICATIONS
* Computers and controllers * Power monitoring * Portable/battery powered equipment * Industrial equipment
SIMPLIFIED SYSTEM DIAGRAM
VDD
VDD
RPU
VDD
RESET
RESET MOTOROLA 68HCXX
MAX6328/ MAX6348
GND
GND
SL01835
Figure 1. MAX6328/6348 simplified system diagram.
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Philips Semiconductors
Product data
3-pin ultra-low power SC70/SOT microprocessor reset circuit
MAX632x/MAX634x
ORDERING INFORMATION MAX632x
TYPE NUMBER MAX6326-XXD MAX6326-XXW MAX6327-XXD MAX6327-XXW MAX6328-XXD MAX6328-XXW PACKAGE NAME SOT23-3 SC70-3 SOT23-3 SC70-3 SOT23-3 SC70-3 DESCRIPTION Plastic small outline package; 3 leads; body width 1.5 mm Plastic small outline package; 3 leads; body width 1.15 mm Plastic small outline package; 3 leads; body width 1.5 mm Plastic small outline package; 3 leads; body width 1.15 mm Plastic small outline package; 3 leads; body width 1.5 mm Plastic small outline package; 3 leads; body width 1.15 mm TEMPERATURE RANGE -40 C to +85 C -40 C to +85 C -40 C to +85 C -40 C to +85 C -40 C to +85 C -40 C to +85 C RESET push-pull push-pull push-pull push-pull open-drain open-drain Active-LOW reset output Active-LOW reset output Active-HIGH reset output Active-HIGH reset output Active-LOW reset output 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) 22 23 26 29 31 Voltage (Typical) 2.2 V 2.3 V 2.6 V 2.9 V 3.1 V
MAX634x
TYPE NUMBER MAX6346-XXD MAX6346-XXW MAX6347-XXD MAX6347-XXW MAX6348-XXD MAX6348-XXW PACKAGE NAME SOT23-3 SC70-3 SOT23-3 SC70-3 SOT23-3 SC70-3 DESCRIPTION Plastic small outline package; 3 leads; body width 1.5 mm Plastic small outline package; 3 leads; body width 1.15 mm Plastic small outline package; 3 leads; body width 1.5 mm Plastic small outline package; 3 leads; body width 1.15 mm Plastic small outline package; 3 leads; body width 1.5 mm Plastic small outline package; 3 leads; body width 1.15 mm TEMPERATURE RANGE -40 C to +85 C -40 C to +85 C -40 C to +85 C -40 C to +85 C -40 C to +85 C -40 C to +85 C RESET push-pull push-pull push-pull push-pull open-drain open-drain Active-LOW reset output Active-LOW reset output Active-HIGH reset output Active-HIGH reset output Active-LOW reset output 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) 44 46 Voltage (Typical) 4.4 V 4.6 V
2003 Aug 05
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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 1 MAX632x/ MAX634x
3 VDD
SYMBOL GND RESET Device ground
DESCRIPTION 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. Positive supply voltage
2
RESET or RESET
2
SL01839
Figure 2. Pin configuration.
3
VDD
MAX6327/MAX6347 pin description
PIN 1 2 SYMBOL GND RESET Device ground 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. Positive supply voltage DESCRIPTION
3
VDD
MAXIMUM RATINGS
SYMBOL VDD Vi(RESET) PARAMETER Supply voltage Input voltage at RESET pin (MAX6326/MAX6346, MAX6328/MAX6348) Input current at VDD pin Output current (RESET pin) Power dissipation 3-pin SOT23 (derate 4 mW/C above Tamb = 70 C) 3-pin SC70 (derate 2.7 mW/C above Tamb = 70 C) Topr Tstg Operating temperature Storage temperature CONDITIONS MIN. -0.3 -0.3 MAX. 6.0 6.0 UNIT V V
Ii(VDD) Io P
- - - - -40 -65
20 20 320 174 +85 +150
mA mA mW
C C
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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 CONDITIONS Tamb = 0 C to +70 C Tamb = -40 C to +85 C IDD Supply current MAX632x only, VDD = 3.0 V for Vth 2.93 V, VDD = 3.2 V for Vth > 2.93 V, no load VDD = 5.5 V, no load Vth Vth/C tRD tRP VOL(RESET) Reset threshold (Table 1) Reset threshold temperature coefficient VCC to Reset release delay Reset active timeout period RESET output voltage (reset asserted) RESET output voltage (reset released) ISINK = 1.6 mA, VDD > 2.1 V ISINK = 100 mA, VDD 1.2 V ISOURCE = 500 mA, VDD = 3.2 V, MAX6326 only ISOURCE = 800 A, VDD = 4.5 V, Vth 4.38 V ISOURCE = 800 A, VDD = Vth(MAX), Vth 4.5 V VOH(RESET) RESET output voltage (reset asserted) ( ) (MAX6327/MAX6347) VOL(RESET) RESET output voltage (reset released) (MAX6327/MAX6347) Vhys RESET threshold hysteresis ISOURCE = 500 A, VDD 2.1 V ISOURCE = 50 A, VDD 1.2 V ISINK = 1.2 mA, VDD 3.2 V (MAX6327 only) ISINK = 3.2 mA, VDD 3.2 V, Vth 4.38 V ISINK = 3.2 mA, VDD = Vth(MAX), Vth 4.5 V MAX6326/MAX6327/MAX6328 MAX6346/MAX6347/MAX6348 Open-drain RESET output leakage current NOTE: 1. Over-temperature limits are guaranteed by design and are not production tested. VDD = Vth to (Vth - 100 mV) Tamb = +25 C Tamb = -40 C to +85 C MIN 1.0 1.2 TYP MAX 5.5 5.5 0.5 1.0 Vth Vth 40 20 185 1.0 1.75 Vth + 1.5% Vth + 2.5% UNIT V V A A V V ppm/C s ms V V V V V V V V V V mV mV A
- -
Vth - 1.5% Vth - 2.5%
- -
100
- -
280 0.3 0.4
- -
0.8 x VCC 0.8 x VCC 0.8 x VCC 0.8 x VCC 0.8 x VCC
VOH(RESET)
- - - - -
0.3 0.4 0.4 6.3 9.5
- - - - - -
- -
0.1
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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 MIN MAX632x-XX MAX632x-XX MAX632x-XX MAX632x-XX MAX632x-XX MAX632x-XX MAX632x-XX MAX632x-XX MAX632x-XX MAX632x-XX MAX634x-XX MAX634x-XX MAX634x-XX MAX634x-XX MAX634x-XX MAX634x-XX MAX634x-XX MAX634x-XX MAX634x-XX MAX634x-XX MAX634x-XX MAX634x-XX MAX634x-XX MAX634x-XX 22 23 24 (Note 2) 25 (Note 2) 26 27 (Note 2) 28 (Note 2) 29 30 (Note 2) 31 33 (Note 2) 34 (Note 2) 35 (Note 2) 36 (Note 2) 37 (Note 2) 38 (Note 2) 39 (Note 2) 40 (Note 2) 41 (Note 2) 42 (Note 2) 43 (Note 2) 44 45 (Note 2) 46 2.167 2.285 2.364 2.462 2.591 2.660 2.758 2.886 2.955 3.034 3.250 3.349 3.447 3.546 3.644 3.743 3.841 3.940 4.038 4.137 4.235 4.314 4.432 4.560 TYP 2.200 2.320 2.400 2.500 2.630 2.700 2.800 2.930 3.000 3.080 3.300 3.400 3.500 3.600 3.700 3.800 3.900 4.000 4.100 4.200 4.300 4.380 4.500 4.630 MAX 2.233 2.355 2.436 2.537 2.669 2.741 2.842 2.974 3.045 3.126 3.350 3.451 3.552 3.654 3.755 3.857 3.958 4.060 4.161 4.263 4.364 4.446 4.567 4.699 Tamb = -40 C to +85 C MIN 2.145 2.262 2.340 2.437 2.564 2.633 2.730 2.857 2.925 3.003 3.217 3.315 3.412 3.510 3.607 3.705 3.802 3.900 3.997 4.095 4.192 4.270 4.387 4.514 MAX 2.250 2.375 2.460 2.562 2.696 2.768 2.870 3.000 3.075 3.150 3.383 3.485 3.587 3.690 3.792 3.895 3.997 4.100 4.202 4.305 4.407 4.489 4.612 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.
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Philips Semiconductors
Product data
3-pin ultra-low power SC70/SOT microprocessor reset circuit
MAX632x/MAX634x
TYPICAL PERFORMANCE CURVES MAX6326
12 OUTPUT SOURCE CURRENT, I SOURCE (mA) OUTPUT SINK CURRENT, I SINK (mA) 45 40 35 30 25 20 15 10 5 0 0 1 2 3 4 RESET OUTPUT VOLTAGE HIGH, VOH (RESET) (V) VDD = 1.2 V
10
8 VDD = 1.2 V 6
4
2
0 0 0.2 0.4 0.6 0.8 1.0 RESET OUTPUT VOLTAGE LOW, VOL(RESET) (V)
SL01831
SL01833
Figure 3. Output sink current vs. RESET output voltage low.
Figure 5. Output sink current vs. RESET output voltage high.
50 OUTPUT SINK CURRENT, I SINK (mA) 45 40 35 30 25 20 15 10 5 0 0 0.5 1.0 1.5 2.0 2.5 RESET OUTPUT VOLTAGE LOW, VOL(RESET) (V) VDD = 2.1 V OUTPUT SOURCE CURRENT, I SOURCE (mA)
70 60 50 40 30 20 10 0 0 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) VDD = 2.1 V
SL01832
SL01834
Figure 4. Output sink current vs. RESET output voltage low.
Figure 6. Output sink current vs. RESET output voltage high.
2003 Aug 05
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Philips Semiconductors
Product data
3-pin ultra-low power SC70/SOT microprocessor reset circuit
MAX632x/MAX634x
APPLICATION INFORMATION Interfacing to Ps with Bidirectional Reset Pins
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 Ps reset input and providing a pull-up resistor to VDD allows either device to independently assert reset (Figure 7).
VDD
System configurations with various Ps
The MAX326-MAX6348 Series resets provide a system solution for various Ps. Figures 9 and 10, respectively, reference the Philips Ps which are compatible with the MAX6326/MAX6346 and MAX6327/MAX6347 system resets.
VDD
VDD VDD RPU VDD RESET RESET RESET MOTOROLA 68HCXX RESET
VDD
MAX6328/ MAX6348
MAX6326/ MAX6346
P(Note 1)
GND GND GND
GND
SL01837 SL01835
Figure 7. Interfacing to Ps 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. 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.
450 MAXIMUM TRANSIENT DURATION ( s) 400 350 300 250 200 150 100 50 0 1 10 100 1000 MAX6326/MAX6327/ MAX6328 MAX6346/MAX6347/ MAX6348
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. P System Diagram using MAX6326/MAX6328 Push-Pull, Active-LOW Resets
VDD
VDD
VDD
RESET
RESET P(Note 1)
MAX6327/ MAX6347
GND
GND
SL01838
NOTE: 1. Philips microprocessors with active-HIGH resets : 8xC5x, 8xC3x, 8xC5xX2, 8xC3xX2, 8xC51Fx, 8xC51Rx+, 89C51Rx2, 89C66x, 8xC554, 8xC552, etc. Figure 10. P System Diagram using MAX6327/MAX6347 Push-Pull, Active-HIGH Resets
RESET COMPARATOR OVERDRIVE, Vth - VCC (mV)
SL01836
Figure 8. Maximum transient duration without causing a reset pulse versus reset comparator overdrive.
2003 Aug 05
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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
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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
2
1.35
0.15 0.05
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
2003 Aug 05
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
0.4 0.25
0.225 0.10
2.1 1.9
0.4 0.1
2003 Aug 05
11
Philips Semiconductors
Product data
3-pin ultra-low power SC70/SOT microprocessor reset circuit
MAX632x/MAX634x
REVISION HISTORY
Rev _2 Date 20030805 Description Product data (9397 750 11124). ECN 853-2423 30165 dated 30 July 2003. Supersedes data of 30 Arpil 2003 (9397 750 10686).
* 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.
Modifications:
Data sheet status
Level
I
Data sheet status [1]
Objective data
Product status [2] [3]
Development
Definitions
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. 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. 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).
II
Preliminary data
Qualification
III
Product data
Production
[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.
Contact information
For additional information please visit http://www.semiconductors.philips.com. Fax: +31 40 27 24825
(c) Koninklijke Philips Electronics N.V. 2003 All rights reserved. Printed in U.S.A. Date of release: 08-03
For sales offices addresses send e-mail to: sales.addresses@www.semiconductors.philips.com.
Document order number:
9397 750 11124
Philips Semiconductors
2003 Aug 05 12

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