INTEGRATED CIRCUITS
MAX6400/MAX6401/MAX6402/
MAX6403/MAX6404/MAX6405
Ultra-low-power microprocessor reset circuit
in 4-bump Chip-Scale package
Product data
2003 May 27
Philips
Semiconductors
Philips Semiconductors
Product data
Ultra-low-power microprocessor reset circuit
in 4-bump Chip-Scale package
MAX6400/MAX6401/MAX6402/
MAX6403/MAX6404/MAX6405
DESCRIPTION
The MAX6400/MAX6401//MAX6402/MAX6403/MAX6404/MAX6405
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. A manual reset input is also available.
MAX6400-MAX6405 assert a reset signal when the V
DD
supply
voltage falls below a preset reset threshold voltage. The reset signal
remains asserted for at least 100 ms after the V
DD
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 V
DD
down to 1 V. They have
excellent immunity to fast transients on V
DD
.
The devices vary in their output configuration. The
MAX6400/MAX6403 have push-pull, active-LOW reset output; while
the MAX6402/MAX6405 have open drain, active-LOW reset output.
The MAX6401/MAX6404 have push-pull, active-HIGH reset output.
The lower threshold MAX6400/MAX6401/MAX6402 have ultra-low
supply current of typically 500 nA, making them ideal for battery
powered applications. All six devices are available in the 4-bump
Chip-Scale (WL-CSP4) package.
FEATURES
•
Ultra-Low 1
µA
(max) supply current
•
Precision monitoring of 2.5 V, 3 V, 3.3 V, and 5 V power supply
•
Reset thresholds available from 2.2 V to 4.63 V
•
±2.5%
threshold accuracy from –40
°C
to +85
°C
•
100 ms (min) Power-on-Reset delay time
•
Manual Reset input
•
Power transient immunity
•
Available in three versions: push-pull RESET, push-pull RESET,
•
Guaranteed reset valid to V
DD
= 1.0 V
•
Ultra-small 4-bump Chip-Scale packages
SIMPLIFIED SYSTEM DIAGRAM
and open-drain RESET
voltages
APPLICATIONS
•
PDAs and pagers
•
MP3 players
•
Portable/battery-powered equipment
•
Cellular phones
V
DD
V
DD
RESET
R
PU
V
DD
RESET
MOTOROLA
68HCXX
MAX6402/MAX6405
MR
PUSH-BUTTON
RESET SWITCH
GND
GND
SL01890
Figure 1. Simplified system diagram.
2003 May 27
2
853-2428 29962
Philips Semiconductors
Product data
Ultra-low-power microprocessor reset circuit
in 4-bump Chip-Scale package
MAX6400/MAX6401/MAX6402/
MAX6403/MAX6404/MAX6405
ORDERING INFORMATION
MAX6400/MAX6401/MAX6402
TYPE NUMBER
MAX6400-XXUK
MAX6401-XXUK
MAX6402-XXUK
PACKAGE
NAME
WL-CSP4
WL-CSP4
WL-CSP4
DESCRIPTION
Wafer-level, chip-scale package; 4 bumps; surface mount
Wafer-level, chip-scale package; 4 bumps; surface mount
Wafer-level, chip-scale package; 4 bumps; surface mount
TEMPERATURE
RANGE
–40
°C
to +85
°C
–40
°C
to +85
°C
–40
°C
to +85
°C
NOTE:
Each device has 5 standard voltage options, indicated by
‘XX’
on the ‘Type number’.
Additional voltage options may be available (see Table 1 for details).
XX
(type number suffix)
22
23
26
29
31
Reset threshold voltage (V)
(Typical)
2.200
2.320
2.630
2.930
3.080
MAX6403/MAX6404/MAX6405
TYPE NUMBER
MAX6403-XXUK
MAX6404-XXUK
MAX6405-XXUK
PACKAGE
NAME
WL-CSP4
WL-CSP4
WL-CSP4
DESCRIPTION
Wafer-level, chip-scale package; 4 bumps; surface mount
Wafer-level, chip-scale package; 4 bumps; surface mount
Wafer-level, chip-scale package; 4 bumps; surface mount
TEMPERATURE
RANGE
–40
°C
to +85
°C
–40
°C
to +85
°C
–40
°C
to +85
°C
NOTE:
Each device has 2 standard voltage options, indicated by
‘XX’
on the ‘Type number’.
Additional voltage options may be available (see Table 1 for details).
XX
(type number suffix)
44
46
Reset threshold voltage (V)
(Typical)
4.380
4.630
2003 May 27
3
Philips Semiconductors
Product data
Ultra-low-power microprocessor reset circuit
in 4-bump Chip-Scale package
MAX6400/MAX6401/MAX6402/
MAX6403/MAX6404/MAX6405
Table 1. Factory-trimmed reset thresholds (note 1)
Reset Threshold Voltage, V
th
(V)
Part number
Suffix (XX)
22
23
24 (Note 2)
25 (Note 2)
MAX6400-XXUK
MAX6400
XXUK
MAX6401-XXUK
MAX6401
XXUK
MAX6402-XXUK
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)
MAX6403-XXUK
MAX6403
XXUK
MAX6404-XXUK
MAX6404
XXUK
MAX6405-XXUK
39 (Note 2)
40 (Note 2)
41 (Note 2)
42 (Note 2)
43 (Note 2)
44
45 (Note 2)
46
T
amb
= +25
°C
Min
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
T
amb
= –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
4.3514
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.
2003 May 27
4
Philips Semiconductors
Product data
Ultra-low-power microprocessor reset circuit
in 4-bump Chip-Scale package
MAX6400/MAX6401/MAX6402/
MAX6403/MAX6404/MAX6405
PINNING
MAX6400/MAX6402/MAX6403/MAX6405
BUMP A1
DESIGNATOR
MAX6401/MAX6404
BUMP A1
DESIGNATOR
GND
A1
A2
V
DD
GND
A1
A2
V
DD
RESET
B1
B2
MR
RESET
B1
B2
MR
TOP VIEW
(SUBSTRATE SIDE)
TOP VIEW
(SUBSTRATE SIDE)
SL01891
SL01892
Figure 2. MAX6400/MAX6402/MAX6403/MAX6405
pin configuration.
Figure 3. MAX6401/MAX6404
pin configuration.
MAX6400/MAX6402/MAX6403/MAX6405
Pin description
BUMP
A1
A2
B1
SYMBOL
GND
V
DD
RESET
DESCRIPTION
Device ground.
Positive supply voltage.
Active-LOW Reset output. RESET
remains LOW while V
DD
is below the
reset threshold and for a reset delay time
of at least 100 ms after V
DD
rises above
the reset threshold. MAX6402/MAX6405
have open-drain output and the
MAX6400/MAX6403 are push-pull output.
Active-LOW Manual Reset. Internal 50 kΩ
pull-up resistor to V
DD
. Pull LOW to
assert a reset condition. As long as MR is
LOW, the reset remains asserted. Reset
is released in typically 185 ms (reset
delay time) after MR goes HIGH. When
unused, the MR pin is connected to V
DD
or left floating.
MAX6401/MAX6404
Pin description
BUMP
A1
A2
B1
SYMBOL
GND
V
DD
RESET
DESCRIPTION
Device ground.
Positive supply voltage.
Active-HIGH Reset Output. RESET
remains HIGH while V
DD
is below the
reset threshold and remains HIGH for at
least 100 ms after V
DD
rises above the
reset threshold.
Active-LOW Manual Reset. Internal 50 kΩ
pull-up resistor to V
DD
. Pull LOW to
assert a reset condition. As long as MR is
LOW, the reset remains asserted. Reset
is released in typically 185 ms (reset
delay time) after MR goes HIGH. When
unused, the MR pin is connected to V
DD
or left floating.
B2
MR
B2
MR
MAXIMUM RATINGS
SYMBOL
V
DD
PARAMETER
Supply voltage
Voltage RESET, RESET (push-pull)
Voltage RESET (open drain)
Voltage manual reset, MR
I
IN
I
OUT
T
amb
T
stg
P
D
Input current (any pin)
Output current (any pin)
Ambient temperature range
Storage temperature range
Power dissipation, 4-bump WL–CSP
Derate 3.8 mW/°C above T
amb
= 70
°C
CONDITIONS
MIN.
–0.3
–0.3
–0.3
–0.3
–
–
–40
–65
–
MAX.
+6
V
DD
+ 0.3
+6
V
CC
+ 0.3
20
20
+85
+150
303
UNIT
V
V
V
V
mA
mA
°C
°C
mW
2003 May 27
5
微控制器 MCU
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