FM809/810
3-Pin µC Supervisor Circuits
General Description
■ 140ms power-on RESET delay (minimum)
■ RESET operation guaranteed to 1.0V
■ Supply current only 2µA
■ No external components
■ Operating Range
– -40°C to +105°C (SOT23)
– -40°C to +85°C (SC70)
■ SOT23-3 and SC70-3 packages
The FM809/810 are supervisor circuits that monitor power
supply or other system voltages and issue reset pulse whenever
the voltage being monitored is out of tolerance. Once asserted,
the reset pulse is guaranteed to be valid for a minimum of
140ms (256ms typical). FM809xx offers active low push-pull
type of reset while FM810xx offers active high push-pull type.
Several threshold voltages are offered to accommodate 5.0V,
3.3V, 3.0V and 2.7V system voltages.
The low supply current (typically 2 µA)recommends FM809/810
devices for portable designs or wherever power saving is
primary.
Applications
■
■
■
■
■
These devices are offered in space saving 3-pin SOT23 and
SC70 packages.
Features
■ VTH voltages of 4.63V, 4.38V, 4.00V, 3.08V, 2.93V and 2.63V
■ RESET (FM809) or RESET (FM810) output
Microcontrollers and Microprocessors
Appliances
Power-Supply Monitoring
Portable Equipment
Automotive Systems
Typical Operating Circuit
VCC
VCC
FM809
µC
RESET
RESET
I/P
GND
GND
Connection Diagram
GND
1
3
RESET (809) or
RESET (810)
VCC
2
FM809/810
SOT23-3 & SC70-3Packages
©2002 Fairchild Semiconductor Corporation
FM809/810 Rev. F
1
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FM809/810 3-Pin µC Supervisor Circuits
October 2002
ESD Rating
Human Body Model
Machine Model
Rate of Rise of VCC
Continuous Power Dissipation (TA = +70°C)
SOT23-3 (derate 4mW/°C above +70°C)
Operating Temperature Range
Storage Temperature Range
Lead Temperature (soldering, 10s)
-0.3V to +6.0V
-0.3V to (VCC + 0.3V)
20mA
20mA
>2KV
>200KV
100V/µs
320mW
-40°C to +105°C
-65°C to +150°C
+300°C
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 SOT23 Package (TA = 25°C unless otherwise noted)
VCC = full range, as noted under conditions. See Note 1.
Parameter
Symbol
Operating Voltage
VCC
Supply Current
ICC
Reset Threshold
VTH
Conditions
Min
TA = 0°C to +70°C
1.0
TA = -40°C to 105°C
1.1
10
TA = -40°C to 105°C, VCC < 3.6V
FM809R/S/T
2
6
FM8xxL
TA = -40°C to +105°C
4.40
4.63
4.86
FM8xxM
TA = -40°C to +105°C
4.18
4.38
4.52
FM8xxJ
TA = -40°C to +105°C
3.90
4.00
4.18
FM8xxT
TA = -40°C to +105°C
2.97
3.08
3.19
FM8xxS
TA = -40°C to +105°C
2.79
2.93
3.00
FM8xxR
TA = -40°C to +105°C
2.49
2.63
2.70
30
VCC = VTH to (VTH - 100mV)
Reset Active Timout Period
TA = -40°C to +105°C
VOL
VOH
FM810 Output Low (RESET)
VOL
VOH
µA
V
ppm/°C
10
15
µs
256
560
ms
VCC = VTH(min), ISINK = 1.2mA,
FM809R/S/T
0.3
V
VCC = VTH(min), ISINK = 3.2mA,
FM809J/L/M
0.4
140
VCC = < 1.0V, ISINK = 50µA
FM809 Output High (RESET)
V
5.5
5
VCC to Reset Delay (Note 2)
FM810 Output High (RESET)
5.5
TA = -40°C to 105°C, VCC < 5.5V
FM809J/L/M
Reset Threshold Tempco
FM809 Output Low (RESET)
Typ
(Note 3) Max Units
0.3
VCC > VTH(max), ISOURCE = 500µA (R/S/T)
0.8VCC
VCC > VTH(max), ISOURCE = 800µA (J/M/L)
VCC - 1.5V
V
VCC = VTH(max), ISINK = 1.2mA,
FM810R/S/T
0.3
VCC = VTH(max), ISINK = 3.2mA,
FM810J/L/M
0.4
1.8V < VCC < VTH(min), ISOURCE = 150µA
0.8VCC
V
V
Note 1: Testing in production is 25°C only. VCC = 5V for FM8xxL/M/J, VCC = 3.3V for FM8xxT/S and VCC = 3V for FM8xxR. Limits over temperature are guaranteed by design.
Note 2: RESET output is for FM809. RESET output is for FM810.
Note 3: Typical values are at 25°C.
Note 4: Recommended minimum slew rate for the VCC rampup is 200mV/sec in the 0 to 2V range for the device to function properly.
2
FM809/810 Rev. F
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FM809/810 3-Pin µC Supervisor Circuits
Absolute Maximum Ratings
Voltage on any terminal relative to GND
VCC
RESET, RESET
Input Current
Output Current: RESET, RESET
Voltage on any terminal relative to GND
VCC
RESET, RESET
Input Current
Output Current: RESET, RESET
ESD Rating
Human Body model
Machine model
Rate of Rise of VCC
Continuous Power Dissipation (TA = +70°C)
SC70-3
Operating Temperature Range
Storage Temperature Range
Lead Temperature (soldering, 10s)
-0.3V to +6.0V
-0.3V to (VCC + 0.3V)
20mA
20mA
1.5KV
>200KV
100V/µs
174mW
-40°C to +85°C
-65°C to +150°C
+300°C
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 SC70 Package (TA = 25°C unless otherwise noted)
VCC = full range, as noted under conditions. See Note 1.
Parameter
Symbol
Operating Voltage
VCC
Supply Current
ICC
Reset Threshold
VTH
Conditions
Min
TA = 0°C to +70°C
1.4
TA = -40°C to 85°C
1.6
TA = -40°C to 85°C, VCC < 5.5V FM809J/L/M
5.5
15
6
10
FM8xxL
TA = -40°C to +85°C
4.40
4.63
4.86
FM8xxM
TA = -40°C to +85°C
4.18
4.38
4.52
FM8xxJ
TA = -40°C to +85°C
3.90
4.00
4.18
FM8xxT
TA = -40°C to +85°C
2.97
3.08
3.19
FM8xxS
TA = -40°C to +85°C
2.79
2.93
3.00
FM8xxR
TA = -40°C to +85°C
2.49
2.63
2.70
Reset Threshold Tempco
30
VCC to Reset Delay (Note 2)
VCC = VTH to (VTH - 100mV)
Reset Active Timout Period
TA = -40°C to +85°C
VOL
V
5.5
9
TA = -40°C to 85°C, VCC < 3.6V FM809R/S/T
FM809 Output Low (RESET)
Typ
(Note 3) Max Units
µA
V
ppm/°C
10
15
µs
256
560
ms
VCC = VTH(min), ISINK = 1.2mA, FM809R/S/T
0.35
V
VCC = VTH(min), ISINK = 3.2mA, FM809J/L/M
0.4
100
VCC = < 1.0V, ISINK = 50µA
FM809 Output High (RESET)
VOH
FM810 Output Low (RESET)
VOL
VCC = VTH(max), ISINK = 1.2mA, FM810R/S/T
FM810 Output High (RESET)
VOH
1.8V < VCC < VTH(min), ISOURCE = 150µA
0.3
VCC > VTH(max), ISOURCE = 500µA (R/S/T)
0.8VCC
VCC > VTH(max), ISOURCE = 800µA (J/M/L)
VCC - 1.5V
V
0.35
VCC = VTH(max), ISINK = 3.2mA, FM810J/L/M
V
0.4
0.8VCC
V
Note 1: Testing in production is 25°C only. VCC = 5V for FM8xxL/M/J, VCC = 3.3V for FM8xxT/S and VCC = 3V for FM8xxR. Limits over temperature are guaranteed by design.
Note 2: RESET output is for FM809. RESET output is for FM810.
Note 3: Typical values are at 25°C.
3
FM809/810 Rev. F
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FM809/810 3-Pin µC Supervisor Circuits
Absolute Maximum Ratings
Pin Number
Name
1
GND
2
RESET*
3
VCC
Function
GROUND
RESET (RESET) remains LOW (HIGH) while VCC is below VTH,
and for at least 140ms after VCC rises above VTH.
* with overbar, FM809 (RESET); without, FM810 (RESET).
Circuit Timing (e.g.: FM809)
INPUT
5V
VTH
1V
GND
OUTPUT
5V
VTH
1V
GND
140ms
When operating properly with 5V in (for example), VOUT will also
be about 5V. When VIN starts to fall, VOUT will follow it down as
shown. When VIN drops below VTH, VOUT drops to ground
("issues a RESET") and stays there unless VIN also falls below
its minimum operating voltage, approx. 1V. At this point, the
supervisor loses control, and its output may rise, only to again
follow VIN down to the ground.
When VIN begins to rise, VOUT follows it until 1.0V or so is
reached, whereupon the device regains control, VOUT is pulled
to ground, etc. When VIN rises above VTH, VOUT comes out of
RESET 140 ms later.
If it is required that a lower value than GND + 1.0V is needed
on RESET signal during VCC ≤ 1V, a 100K resistor may be used
on the device output (to GND for the FM809, to VCC for the
FM810).
4
FM809/810 Rev. F
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FM809/810 3-Pin µC Supervisor Circuits
Pin Descriptions
Part Number
Top Marking
RESET
Threshold (V)
Output Type
Package Type
Packing
Method
FM809LS3X
09L
4.63
Push-Pull, active LOW
3-Pin, SOT23
3000 units in T&R
FM809MS3X
09M
4.38
Push-Pull, active LOW
3-Pin, SOT23
3000 units in T&R
FM809JS3X
09J
4.00
Push-Pull, active LOW
3-Pin, SOT23
3000 units in T&R
FM809TS3X
09T
3.08
Push-Pull, active LOW
3-Pin, SOT23
3000 units in T&R
FM809SS3X
09S
2.93
Push-Pull, active LOW
3-Pin, SOT23
3000 units in T&R
FM809RS3X
09R
2.63
Push-Pull, active LOW
3-Pin, SOT23
3000 units in T&R
FM809LP3X
VLY
4.63
Push-Pull, active LOW
3-Pin, SC70
3000 units in T&R
FM809MP3X
VMY
4.38
Push-Pull, active LOW
3-Pin, SC70
3000 units in T&R
FM809JP3X
VJY
4.00
Push-Pull, active LOW
3-Pin, SC70
3000 units in T&R
FM809TP3X
VTY
3.08
Push-Pull, active LOW
3-Pin, SC70
3000 units in T&R
FM809SP3X
VSY
2.93
Push-Pull, active LOW
3-Pin, SC70
3000 units in T&R
FM809RP3X
VRY
2.63
Push-Pull, active LOW
3-Pin, SC70
3000 units in T&R
Note 4: Devices listed above feature 250ms typical Reset Pulse width. Consult Fairchild sales for other reset pulse width options.
5
FM809/810 Rev. F
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FM809/810 3-Pin µC Supervisor Circuits
Ordering Information (FM809)
Part Number Top Marking
RESET
Threshold (V)
Output Type
Package Type
Packing
Method
FM810LS3X
10L
4.63
Push-Pull, active HIGH
3-Pin, SOT23
3000 units in T&R
FM810MS3X
10M
4.38
Push-Pull, active HIGH
3-Pin, SOT23
3000 units in T&R
FM810JS3X
10J
4.00
Push-Pull, active HIGH
3-Pin, SOT23
3000 units in T&R
FM810TS3X
10T
3.08
Push-Pull, active HIGH
3-Pin, SOT23
3000 units in T&R
FM810SS3X
10S
2.93
Push-Pull, active HIGH
3-Pin, SOT23
3000 units in T&R
FM810RS3X
10R
2.63
Push-Pull, active HIGH
3-Pin, SOT23
3000 units in T&R
FM810LP3X
ZLY
4.63
Push-Pull, active HIGH
3-Pin, SC70
3000 units in T&R
FM810MP3X
ZMY
4.38
Push-Pull, active HIGH
3-Pin, SC70
3000 units in T&R
FM810JP3X
ZJY
4.00
Push-Pull, active HIGH
3-Pin, SC70
3000 units in T&R
FM810TP3X
ZTY
3.08
Push-Pull, active HIGH
3-Pin, SC70
3000 units in T&R
FM810SP3X
ZSY
2.93
Push-Pull, active HIGH
3-Pin, SC70
3000 units in T&R
FM810RP3X
ZRY
2.63
Push-Pull, active HIGH
3-Pin, SC70
3000 units in T&R
Note 5: Devices listed above feature 250ms typical Reset Pulse width. Consult Fairchild sales for other reset pulse width options.
6
FM809/810 Rev. F
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FM809/810 3-Pin µC Supervisor Circuits
Ordering Information (FM810)
FM809/810 3-Pin µC Supervisor Circuits
Physical Dimensions inches (millimeters) unless otherwise noted
0.021
0.015
0.055
0.047
0.098
0.083
0.120
0.105
0.0059
0.0035
0.040
0.031
0.079
0.071
0-8˚
0.010
0.005
0.004
0.001
0.76
2.29
PKG
CL
0.76
0.95
LAND PATTERN RECOMMENDATION
SOT-23 Package Dimensions
FS Pkg Code AU
7
FM809/810 Rev. F
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FM809/810 3-Pin µC Supervisor Circuits
Physical Dimensions inches (millimeters) unless otherwise noted
.087 (2.2)
.071 (1.8)
.053 (1.35)
.045 (1.15)
.087 (2.2)
.079 (2.0)
.009 (.23)
.005 (.13)
.043 (1.1)
.032 (.80)
.004 (.10)
.010 (.25)
.004 (.10)
.016 (.40)
.012 (.30)
.026
(.65)
.018 (.45)
.006 (.15)
.052
(1.3)
0.65
1.80
0.65
0.6
0.5
Land Pattern Recommendation
SC70 Package Dimensions
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) are intended for surgical implant into the body, 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.
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Customer Response Center
Tel. 1-888-522-5372
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Tel; +852-2722-8338
Fax: +852-2722-8383
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FM809/810 Rev. F
2. A critical component is any component of a life support
device or system whose failure to perform can be reasonably
expected to cause the failure of the life support device or
system, or to affect its safety or effectiveness.
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