MOTOROLA MAX810TTR, MAX810STR, MAX810LTR, MAX809JTR, MAX809LTR Datasheet
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MAX809, MAX810
3-Pin Micropr ocessor
Reset Monitors
The MAX809 and MAX810 are cost–effective system supervisor
circuits designed to monitor VCC in digital systems and provide a reset
signal to the host processor when necessary. No external components
are required.
The reset output is driven active within 20 µsec of V
through the reset voltage threshold. Reset is maintained active for a
minimum of 140msec after V
rises above the reset threshold. The
CC
MAX810 has an active–high RESET output while the MAX809 has
an active–low RESET output. The output of the MAX809 is
guaranteed valid down to VCC = 1V. Both devices are available in a
SOT–23 package.
The MAX809/810 are optimized to reject fast transient glitches on
the V
line. Low supply current of 17µA (V
CC
= 3.3V) makes these
CC
devices suitable for battery powered applications.
Features
• Precision V
Monitor for 3.0V, 3.3V, and 5.0V Supplies
CC
• 140msec Guaranteed Minimum RESET , RESET
Output Duration
• RESET Output Guaranteed to V
= 1.0V (MAX809)
CC
• Low 17µA Supply Current
• V
Transient Immunity
CC
• Small SOT–23 Package
• No External Components
• Wide Operating Temperature: –40°C to 85°C
Typical Applications
• Computers
• Embedded Systems
• Battery Powered Equipment
• Critical µP Power Supply Monitoring
falling
CC
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SOT–23
(TO–236)
CASE 318
PIN CONFIGURATION
(Top View)
1
GND
V
3
CC
RESET
(RESET)**
NOTE: *SOT–23 is equivalent to JEDEC (TO–236)
2
SOT–23*
** RESET
** RESET is for MAX810
ORDERING INFORMATION
is for MAX809
TYPICAL APPLICATION DIAGRAM
V
CC
V
CC
MAX809
RESET
GND GND
Semiconductor Components Industries, LLC, 1999
February , 2000 – Rev. 2
V
CC
PROCESSOR
RESET
INPUT
Device Package Shipping
MAX809xTR SOT–23 3000 Tape/Reel
MAX810xTR SOT–23 3000 Tape/Reel
NOTE: The ”x” denotes a suffix for VCC threshold –
see table below
Suffix Reset VCC Threshold (V)
L 4.63
M 4.38
J* 4.00
T 3.08
S 2.93
R 2.63
NOTE: *J version is available for MAX809 only
1 Publication Order Number:
MAX809/D
MAX809, MAX810
ABSOLUTE MAXIMUM RATINGS*
Symbol Parameter Value Unit
Supply Voltage (VCC to GND) 6.0 V
RESET, RESET –0.3 to (VCC + 0.3) V
Input Current, V
Output Current, RESET, RESET 20 mA
dV/dt (VCC) 100 V/µsec
P
D
T
A
T
stg
T
sol
* Maximum Ratings are those values beyond which damage to the device may occur.
Power Dissipation (TA ≤ 70°C)
SOT–23 (derate 4mW/°C above +70°C)
Operating Temperature Range –40 to +85 °C
Storage Temperature Range –65 to +150 °C
Lead Temperature (Soldering, 10 Seconds) +260 °C
CC
20 mA
230
mW
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MAX809, MAX810
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ELECTRICAL CHARACTERISTICS (VCC = Full Range, TA = –40°C to +85°C unless otherwise noted. typical values are at T
= 1.2mA
= 3.2mA
= 500µA
= 800µA
= 1.2mA
= 3.2mA
(Note NO TAG)
1.0
1.2
—
—
4.56
4.50
4.31
4.25
3.93
3.89
3.04
3.00
2.89
2.85
2.59
2.55
—
—
—
0.8 V
CC
VCC – 1.5
—
—
0.8 V
CC
—
—
24
17
4.63
—
4.38
—
4.00
—
3.08
—
2.93
—
2.63
—
—
—
—
—
—
—
—
— —
5.5
5.5
µA
60
50
4.70
4.75
4.45
4.50
4.06
4.10
3.11
3.15
2.96
3.00
2.66
2.70
0.3
0.4
0.3
—
—
0.3
0.4
= +25C, VCC = 5V for L/M/J, 3.3V for T/S, 3.0V for R)
Symbol
VCC Range
TA = 0°C to +70°C
TA = –40°C to +85°C
I
CC
Supply Current
MAX8xxL/M/J: VCC < 5.5V
MAX8xxR/S/T: VCC < 3.6V
V
TH
Reset Threshold (Note NO TAG)
MAX8xxL: TA = 25°C
TA = –40°C to +85°C
MAX8xxM: TA = 25°C
TA = –40°C to +85°C
MAX809J: TA = 25°C
TA = –40°C to +85°C
MAX8xxT: TA = 25°C
TA = –40°C to +85°C
MAX8xxS: TA = 25°C
TA = –40°C to +85°C
MAX8xxR: TA = 25°C
TA = –40°C to +85°C
Reset Threshold Temperature Coefficient — 30 — ppm/°C
VCC to Reset Delay VCC = VTH to (VTH – 100mV) — 20 — µsec
Reset Active Timeout Period 140 240 560 msec
V
OL
RESET Output Voltage Low (MAX809)
MAX809R/S/T: VCC = VTH min, I
MAX809L/M/J: VCC = VTH min, I
VCC > 1.0V, I
V
OH
RESET Output Voltage High (MAX809)
MAX809R/S/T: VCC > VTH max, I
SINK
= 50µA
MAX809L/M/J: VCC > VTH max, I
V
OL
RESET Output Voltage Low (MAX810)
MAX810R/S/T: VCC = VTH max, I
MAX810L/M/J: VCC = VTH max, I
V
OH
RESET Output Voltage High (MAX810)
1.8 < VCC < VTH min, I
1. Production testing done at TA = 25°C, over temperature limits guaranteed by design.
Characteristic Min Typ Max Unit
SINK
SINK
SOURCE
SOURCE
SINK
SINK
SOURCE
= 150µA
A
V
V
V
V
V
V
PIN DESCRIPTION
Pin No. Symbol Description
1
2
ÁÁÁ
2
3
GND
RESET (MAX809)
ÁÁÁÁ
RESET (MAX810)
V
CC
Ground
RESET output remains low while VCC is below the reset voltage threshold, and for 240msec (typ.)
after VCC rises above reset threshold
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RESET output remains high while VCC is below the reset voltage threshold, and for 240msec (typ.)
after VCC rises above reset threshold
Supply Voltage (typ.)
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