PHILIPS MAX810 3-pin microprocessor reset Datasheet

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].
2003 Aug 08
Document order number:
12
9397 750 11889