FM6333U [FAIRCHILD]
Power Supply Support Circuit, Fixed, 1 Channel, PDSO3, SOT-23, 3 PIN;
| 型号： | FM6333U |
| 厂家： | 
FAIRCHILD SEMICONDUCTOR |
| 描述： | Power Supply Support Circuit, Fixed, 1 Channel, PDSO3, SOT-23, 3 PIN 光电二极管 |
| 文件： | 总6页 (文件大小：44K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
ADVANCED INFORMATION
April 2001
FM6332/3/4
3-Pin Ultra-Low-Voltage µC Supervisor Circuit
General Description
Features
The FM6332/3/4 are low-power supervisor circuits that monitor a
microprocessor power supply or other system voltage and issue
a reset pulse when a fault condition exists. The threshold voltages
offered accommodate systems with requirements below the com-
mon 5.0V and 3.3V levels.
I Precision monitoring of low-voltage microprocessor systems
I VTH values of 1.60V, 1.80V, 2.00V, 2.20V and 2.30V
I Low-power: operating current 3.3µA typical
I Push-pull output on FM6332/3; open-drain output on FM6334
I Automatic restart of microprocessor after power failure
I 100ms (min) power-on RESET delay
The devices feature a precision temperature-compensated volt-
age reference and comparator. When VCC falls to the threshold
voltage, a RESET pulse is issued, holding the output in the active
state (LOW for FM6333/4 and HIGH for FM6332). When power
rises above VTH, the reset remains for approximately 250 ms to
allow the system clock and other circuits to stabilize.
I Other reset choices available: 32 to 256ms
I Operating Temperature -40°C to +85°C
I SOT23 package
Typical Operating Circuit
VCC
Reset_out
Output
Stage
VCC Tolerance Detect
& Reset Monitor
External Reset
Detection
Temp. Compensated
Reference
Connection Diagram
3
1 = GND
2 = RESET/RESET
3 = VCC
FM6332/3/4
1
2
SOT23 Package
1
© 2001 Fairchild Semiconductor Corporation
FM6332/3/4 Rev. A.5
www.fairchildsemi.com
Each FM6332/3/4 device has the following Identifier (Top Mark on devices will be 32yz, 33yz or 34yz)
Reset Characteristics
RESET THRESHOLD (VTH) Identifier # (y) Fairchild Part Number
2.30
2.20
2.00
1.80
1.60
Y
X
FM633_Yz
FM633_Xz
FM633_Uz
FM633_Wz
FM633_Vz
U
W
V
RESET PULSE DURATION (ms) Identifier# (z) Fairchild Part Number
32
E
FM633_yE*
FM633_yF*
FM633_yH*
FM633_y
64
F
128
256
H
Blank
Note*: These choices are available upon special request only. Please work with Fairchild Marketing to determine availability.
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FM6332/3/4 Rev. A.5
Absolute Maximum Ratings
Voltage on any pin relative to GND
Continuous Power Dissipation (TA = 70°C)
SOT23-3 (derate 4mW above 70°C)
VCC
-0.3V to +6.0V
-0.3V to (VCC + 0.3V)
300mW
-40°C to +85°C
-65°C to +150°C
+300°C
RESET, RESET
Input Current
Output Current (RESET, RESET)
Operating Temperature Range
Storage Temperature Range
Lead Temperature (soldering, 10s)
20mA
20mA
These are stress ratings only, and functional operation is not implied for these levels or beyond. Exposure to Absolute Maximum Rating
conditions for extended periods may affect device reliability.
Electrical Characteristics (VCC = V; TA = -40°C to +85°C unless otherwise noted)
Parameter
Operating Voltage
Operating Voltage
Supply Current
Symbol
VCC
Conditions
Min
0.8
Typ
Max Units
FM6332/FM6333
FM6334
5.5
5.5
µA
V
V
VCC
1.2
ICC
No Load
3.3
Reset Threshold
Reset Threshold
Reset Threshold
Reset Threshold
Reset Threshold
VTH
VTH
VTH
VTH
FM633_Y
FM633_X
FM633_U
FM633_W
FM633_V
-5%
-5%
-5%
-5%
-5%
2.30
2.20
2.00
1.80
1.60
+5%
+5%
+5%
+5%
+5%
V
V
V
V
V
VTH
VOH
ISOURCE = 200µA, VCC >1.8V
ISOURCE = 500µA, VCC >2.7V
0.8VCC
0.8VCC
V
V
Reset Output Voltage
(FM6333/FM6334)
VOL
VOH
VOL
tRST
ISINK = 50µA, VCC >1.0V
ISINK = 500µA, VCC >1.8V
0.4
0.3
V
V
ISOURCE = 1µA, VCC >1.0V
ISOURCE = 200µA, VCC >1.8V
0.8VCC
0.8VCC
V
V
Reset Output Voltage
(FM6332)
ISINK = 500µA, VCC >1.8V
ISINK = 1.2mA, VCC >2.7V
0.3
0.3
V
V
Reset Timeout Period
175
240
375
ms
3
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FM6332/3/4 Rev. A.5
General Description
The FM6332/3/4 feature a highly accurate voltage reference to
which VCC is compared. Once VCC is below the specified thresh-
old, it will drive the reset line and continue to hold it LOW (HIGH
for FM6332) until VCC returns above the threshold and the time for
theresetpulsedurationhasexpired.TheFM6332/3/4areimmune
to short negative going transients on the VCC line. The placement
of a 0.1µF bypass capacitor as close as possible to the VCC pin
provides additional transient immunity.
ForaVCC valuebelow0.7V,theFM6332/3/4donotsinkverymuch
current on the reset pin. This is not a problem in most systems
since common devices are not functional in this range. If the
applicationrequiresthesupervisordevicetoworkbelow0.7V,use
only FM6332/3. If it is desired for the FM6332/3 reset to be
functional below this range, use a 100KΩ pull up for FM6332 (or
pull down, for FM6333) resistor between reset and VSS
.
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FM6332/3/4 Rev. A.5
Typical Operating Characteristics
Supply Current Vs. Temperature
8
7
6
5
data to be available after characterization
4
3
2
1
0
-60
-40
-20
0
20
40
60
80
100
Temperature (C)
Power up Reset Timeout Vs. Temperature
300
280
260
240
220
200
-60
-40
-20
0
20
40
60
80
100
Temperature (C)
Normalized Reset Threshold Vs. Temperature
1.050
1.025
data to be available after characterization
1.000
0.975
0.950
-60
-40
-20
0
-20
-40
60
80
100
Temperature (C)
5
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FM6332/3/4 Rev. A.5
Physical Dimensions inches (millimeters) unless otherwise noted
0.40 0.03
0.03~0.10
0.38 REF
+0.05
–0.023
0.40 0.03
0.12
0.96~1.14
2.90 0.10
0.95 0.03 0.95 0.03
1.90 0.03
0.508REF
SOT-23 Package Dimensions
FS Pkg Code AU
Life Support Policy
Fairchild's products are not authorized for use as critical components in life support devices or systems without the express written
approval of the President of Fairchild Semiconductor Corporation. As used herein:
1. Life support devices or systems are devices or systems which,
(a)areintendedforsurgicalimplantintothebody,or(b)support
or sustain life, and whose failure to perform, when properly
used in accordance with instructions for use provided in the
labeling, can be reasonably expected to result in a significant
injury to the user.
2. A critical component is any component of a life support device
or system whose failure to perform can be reasonably ex-
pected to cause the failure of the life support device or system,
or to affect its safety or effectiveness.
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Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications.
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FM6332/3/4 Rev. A.5
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