Document
ADV
3-pin microprocessor resets
The ADV809 and ADV810 are cost–effective system supervisorcircuits designed to monitor VCC in digital systems and provide a resetsignal to the host processor when necessary. No external componentsare required.The reset output is driven active within 20 sec of VCC fallingthrough the reset voltage threshold. Reset is maintained active for aminimum of 140msec after VCC rises above the reset threshold.
TheADV810 has an active–high RESET output while the ADV809 hasan active–low RESET output. The output of the ADV809 isguaranteed valid down to VCC = 1V. Both devices are available in aSOT–23 package.
The ADV809/810 are optimized to reject fast transient glitches on
Features
Precision VCC Monitor for 3.0V, 3.3V, and 5.0V Supplies 140msec Guaranteed Minimum RESET, RESET
Output Duration
RESET Output Guaranteed to VCC = 1.0V (MAX809) Low 17A Supply Current VCC Transient Immunity Small SOT–23 Package No External Components Wide Operating Temperature: –40C to 85C
Typical Applications
Computers Embedded Systems Battery Powered Equipment Critical P Power Supply Monitoring
TYPICAL APPLICATION DIAGRAM
VCC
ADV809 ADV810
RESET RESET
GND
VCC PROCESSOR
RESET INPUT RESET INPUT
GND
ADV809/810
SOT–23
GND 1
RESET 2 (RESET)**
3 VCC
SSOOTT–2233**
NOTE:*SOT–23 is equivalent to JEDEC (TO–236) ** RESET is for ADV809 ** RESET is for ADV810
ORDERING INFORMATION
Device
Package
Shipping
ADV809xTR
SOT–23
3000 Tape/Reel
ADV810xTR
SOT–23
3000 Tape/Reel
NOTE: The ”x” denotes a suffix for VCC threshold – see table below
Suffix L M J* T S R
Reset VCC Threshold (V) 4.63 4.38 4.00 3.08 2.93 2.63
NOTE: *J version is available for ADV809 only
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ADV
ADV809/810
Absolute Maximum Ratings
Pin Terminal Voltage with Respect to Ground VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3V to 6.0V RESET, RESET . . . . . . . . . . . . . . . . . . . . . . . . . –0.3V to (VCC + 0.3V) Input Current at VCC . . . . . . . . . . . . . . . . . . . 20mA Output Current: RESET, RESET . . . . . . . . . 20mA Rate of Rise at VCC . . . . . . . . . . . . . . . . . . . . 100V/μs
Power Dissipation (TA= 70°C) . . . .. . 320mW (Derate 4mW/°C above 70°C) Operating Temperature Range . . . . . –40°C to 105°C Storage Temperature Range . . . . . . . –65°C to 160°C Lead Temperature (soldering, 10 sec) . . . . . 300°C
These are stress ratings only and functional operation is not ADVlied.Exposure to absolute maximum ratings for prolonged time periods mayaffect device reliability
Electrical Characteristics
Unless otherwise noted VCC is over the full voltage range, TA = –40°C to 105°C. Typical values at TA = 25°C, VCC = 5V for L/M/J devices, VCC = 3.3V for T/S devices and VCC = 3V for R devices.
Parameter Symbol
Conditions
Min Typ
Input Voltage (VCC)
TA = 0°C to 70°C
1.1
VCC
TA = –40°C to 105°C
1.2
Range
Supply Current Reset Threshold
Reset Threshold Stability
TA = –40°C to 85°C
VCC < 5.5V, L/M/J
9
ICC
TA = –40°C to 85°C TA = 85°C to 105°C
VCC < 3.6V, R/S/T VCC < 5.5V, L/M/J
6
TA = 85°C to 105°C
VCC < 3.6V, R/S/T
VTH
L devices
TA = 25°C TA = –40°C to 85°C
4.56 4.50
4.63
TA = 85°C to 105°C 4.40
TA = 25°C
4.31 4.38
M devices
TA = –40°C to 85°C 4.25
TA = 85°C to 105°C 4.16
J devices
TA = 25°C
3.93 4.00
TA = –40°C to 85°C 3.89
TA = 85°C to 105°C 3.80
T devices
TA = 25°C
3.04 3.08
TA = –40°C to 85°C 3.00
TA = 85°C to 105°C 2.92
S devices
TA = 25°C
2.89 2.93
TA = –40°C to 85°C 2.85
TA = 85°C to 105°C 2.78
R devices
TA = 25°C
2.59 2.63
TA = –40°C to 85°C 2.55
TA = 85°C to 105°C 2.50
30
VCC to Reset Delay
VCC = VTH to VTH - 100mV
20
Reset Active Timeout Period
VOL
TA = –40°C to 85°C TA = 85°C to 105°C
140
240
100
Low RESET Output Voltage (ADV809)
VCC = VTH min., ISINK = 1.2mA, ADV809R/S/T
VOL
VCC = VTH min., ISINK = 3.2mA, ADV809L/M/J
VCC > 1.1V, ISINK = 50µA
High RESET Output Voltage (ADV809)
VOH
VCC > VTH max., ISOURCE = 500µA, ADV809R/S/T 0.8VCC
VCC > VTH max., ISOURCE =800µA, ADV809R/M/J
VCC -1.5
Low RESET Output Voltage (ADV810)
VOL
VCC = VTH max., ISINK = 1.2mA,ADV810R/S/T
VCC = VTH max., ISINK = 3.2mA, ADV810L/M/J
High RESET Output Voltage (ADV810)
VOH
1.8V < VCC < VTH min., ISOURCE = 150µA
0.8VCC
Notes: 1. Production testing done at TA = 25°C. Over-temperature specifications guaranteed by design only.
2. RESET output is active LOW for the ADV809 and RESET output is active HIGH for the ADV810
Max
5.5 5.5
15 10 25 20 4.70 4.75 4.86 4.45 4.50 4.56 4.06 4.10 4.20 3.11 3.15 3.23 2.96 3.00 3.08 2.66 2.70 2.76
560 840 0.3 0.4 0.3
0.3 0.4
Units
V µA V
ppm/°C µs ms ms V V V V
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ADV
ADV809/810
Pin Descriptions
Pin Number
1
Name
GND
2 (ADV809)
RESET
2 (ADV810) 3
RESET.