Fairchild Semiconductor FM810T Datasheet

©2002 Fairchild Semiconductor Corporation

1

www.fairchildsemi.com

October 2002

FM809/810 3-Pin µC Supervisor Circuits

FM809/810 Rev. F

FM809/810
3-Pin µC Supervisor Circuits

General Description

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.

These devices are offered in space saving 3-pin SOT23 and
SC70 packages.

Features

■

V

TH

voltages of 4.63V, 4.38V, 4.00V, 3.08V, 2.93V and 2.63V

■

RESET

(FM809) or RESET (FM810) output

■

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

Applications

■

Microcontrollers and Microprocessors

■

Appliances

■

Power-Supply Monitoring

■

Portable Equipment

■

Automotive Systems

Typical Operating Circuit

Connection Diagram

FM809

µC

GND

V

CC

V

CC

GND

RESET
I/P

RESET

V

CC

3

GND

RESET (809) or

RESET (810)

1

2

FM809/810

SOT23-3 & SC70-3Packages

FM809/810 3-Pin µC Supervisor Circuits

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FM809/810 Rev. F

Absolute Maximum Ratings

Voltage on any terminal relative to GND
V

CC

-0.3V to +6.0V

RESET, RESET

-0.3V to (V

CC

+ 0.3V)
Input Current 20mA
Output Current: RESET, RESET

20mA

ESD Rating
Human Body Model >2KV
Machine Model >200KV
Rate of Rise of V

CC

100V/µs

Continuous Power Dissipation (T

A

= +70°C)
SOT23-3 (derate 4mW/°C above +70°C) 320mW
Operating Temperature Range -40°C to +105°C
Storage Temperature Range -65°C to +150°C
Lead Temperature (soldering, 10s) +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 (T

A

= 25°C unless otherwise noted)

V

CC

= full range, as noted under conditions. See Note 1.

Note 1: Testing in production is 25°C only. V

CC

= 5V for FM8xxL/M/J, V

CC

= 3.3V for FM8xxT/S and V

CC

= 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 V

CC

rampup is 200mV/sec in the 0 to 2V range for the device to function properly.

Parameter Symbol Conditions Min

Typ

(Note 3) Max Units

Operating Voltage V

CC

T

A

= 0°C to +70°C 1.0 5.5 V

T

A

= -40°C to 105°C 1.1 5.5

Supply Current I

CC

T

A

= -40°C to 105°C, V

CC

< 5.5V

FM809J/L/M

510µA

T

A

= -40°C to 105°C, V

CC

< 3.6V

FM809R/S/T

26

Reset Threshold V

TH

FM8xxL T

A

= -40°C to +105°C 4.40 4.63 4.86 V

FM8xxM T

A

= -40°C to +105°C 4.18 4.38 4.52

FM8xxJ T

A

= -40°C to +105°C 3.90 4.00 4.18

FM8xxT T

A

= -40°C to +105°C 2.97 3.08 3.19

FM8xxS T

A

= -40°C to +105°C 2.79 2.93 3.00

FM8xxR T

A

= -40°C to +105°C 2.49 2.63 2.70

Reset Threshold Tempco 30 ppm/°C

V

CC

to Reset Delay (Note 2) V

CC

= V

TH

to (V

TH

- 100mV) 10 15 µs

Reset Active Timout Period T

A

= -40°C to +105°C 140 256 560 ms

FM809 Output Low (RESET)V

OL

V

CC

= V

TH

(min), I

SINK

= 1.2mA,

FM809R/S/T

0.3 V

V

CC

= V

TH

(min), I

SINK

= 3.2mA,

FM809J/L/M

0.4

V

CC

= < 1.0V, I

SINK

= 50µA 0.3

FM809 Output High (RESET)V

OH

V

CC

> V

TH

(max), I

SOURCE

= 500µA (R/S/T) 0.8V

CC

V

V

CC

> V

TH

(max), I

SOURCE

= 800µA (J/M/L) V

CC

- 1.5V

FM810 Output Low (RESET) V

OL

V

CC

= V

TH

(max), I

SINK

= 1.2mA,

FM810R/S/T

0.3 V

V

CC

= V

TH

(max), I

SINK

= 3.2mA,

FM810J/L/M

0.4

FM810 Output High (RESET) V

OH

1.8V < V

CC

< V

TH

(min), I

SOURCE

= 150µA 0.8V

CC

V

FM809/810 3-Pin µC Supervisor Circuits

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FM809/810 Rev. F

Absolute Maximum Ratings

Voltage on any terminal relative to GND
V

CC

-0.3V to +6.0V

RESET, RESET

-0.3V to (V

CC

+ 0.3V)
Input Current 20mA
Output Current: RESET, RESET

20mA

ESD Rating
Human Body model 1.5KV
Machine model >200KV
Rate of Rise of V

CC

100V/µs

Continuous Power Dissipation (T

A

= +70°C)
SC70-3 174mW
Operating Temperature Range -40°C to +85°C
Storage Temperature Range -65°C to +150°C
Lead Temperature (soldering, 10s) +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 (T

A

= 25°C unless otherwise noted)

V

CC

= full range, as noted under conditions. See Note 1.

Note 1: Testing in production is 25°C only. V

CC

= 5V for FM8xxL/M/J, V

CC

= 3.3V for FM8xxT/S and V

CC

= 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.

Parameter Symbol Conditions Min

Typ

(Note 3) Max Units

Operating Voltage V

CC

T

A

= 0°C to +70°C 1.4 5.5 V

T

A

= -40°C to 85°C 1.6 5.5

Supply Current I

CC

T

A

= -40°C to 85°C, V

CC

< 5.5V FM809J/L/M 9 15 µA

T

A

= -40°C to 85°C, V

CC

< 3.6V FM809R/S/T 6 10

Reset Threshold V

TH

FM8xxL T

A

= -40°C to +85°C 4.40 4.63 4.86 V

FM8xxM T

A

= -40°C to +85°C 4.18 4.38 4.52

FM8xxJ T

A

= -40°C to +85°C 3.90 4.00 4.18

FM8xxT T

A

= -40°C to +85°C 2.97 3.08 3.19

FM8xxS T

A

= -40°C to +85°C 2.79 2.93 3.00

FM8xxR T

A

= -40°C to +85°C 2.49 2.63 2.70

Reset Threshold Tempco 30 ppm/°C

V

CC

to Reset Delay (Note 2) V

CC

= V

TH

to (V

TH

- 100mV) 10 15 µs

Reset Active Timout Period T

A

= -40°C to +85°C 100 256 560 ms

FM809 Output Low (RESET)V

OL

V

CC

= V

TH

(min), I

SINK

= 1.2mA, FM809R/S/T 0.35 V

V

CC

= V

TH

(min), I

SINK

= 3.2mA, FM809J/L/M 0.4

V

CC

= < 1.0V, I

SINK

= 50µA 0.3

FM809 Output High (RESET)V

OH

V

CC

> V

TH

(max), I

SOURCE

= 500µA (R/S/T) 0.8V

CC

V

VCC > VTH(max), I

SOURCE

= 800µA (J/M/L) VCC - 1.5V

FM810 Output Low (RESET) V

OL

VCC = VTH(max), I

SINK

= 1.2mA, FM810R/S/T 0.35 V

VCC = VTH(max), I

SINK

= 3.2mA, FM810J/L/M 0.4

FM810 Output High (RESET) V

OH

1.8V < VCC < VTH(min), I

SOURCE

= 150µA 0.8V

CC

V