A1 PROs IMP810SEUR-T 3-pin microcontroller power supply supervisor Datasheet

IMP809, IMP81 0
POWER MANAGEMENT
3-Pin Microcontroller
Power Supply Supervisor
The IMP809/IMP810 are 3.0V, 3.3V and 5.0V power supply supervisor circuits optimized for low-power microprocessor (µP), microcontroller (µC)
and digital systems. The IMP809/810 are improved drop-in replacements
for the Maxim MAX809/810 and feature 60% lower supply current.
A reset signal is issued if the power supply voltage drops below a preset
reset threshold and is asserted for at least 140ms after the supply has
risen above the reset threshold. The IMP809 has an active-low RESET
output that is guaranteed to be in the correct state for VCC down to 1.1V.
The IMP810 has an active-high RESET output. The reset comparator is
designed to ignore fast transients on VCC.
Low supply current makes the IMP809/IMP810 ideal for use in portable
and battery operated equipment. The IMP809/IMP810 are available in a
compact 3-pin SOT23 package.
Key Features
◆ Improved Maxim MAX809/MAX810 replacement
— Lower supply current…6µA
— 80% lower maximum supply current
◆ Monitor 5V, 3.3V and 3V supplies
◆ 140ms min. reset pulse width
◆ Active-low reset valid with 1.1V supply
(IMP809)
◆ Small 3-pin SOT-23 package
◆ No external components
◆ Specified over full temperature range
— – 40°C to 105°C
Applications
Six voltage thresholds are available to support 3V to 5V systems:
Reset Threshold
Suffix
Voltage (V)
L
◆
◆
◆
◆
◆
4.63
M
4.38
J
4.00
T
3.08
S
2.93
R
2.63
Embedded controllers
Battery operated systems
Intelligent instruments
Wireless communication systems
PDAs and handheld equipment
Block Diagrams
VCC
VCC
IMP809
(IMP810)
RESET
(RESET)
GND
VCC
µP
RESET
Input
GND
809/10_01.eps
IMP, Inc.
San Jose, CA
408-432-9100/www.impweb.com
IMP809, IMP81 0
Pin Configuration
SOT23
GND 1
IMP809
(IMP810)
3 VCC
(RESET) RESET 2
809/10_02.eps
Ordering Information
Part Number 1
Reset Threshold (V)
IMP809 Active LOW Reset
Temperature Range
Pin-Package
Package Marking2
(XX Lot Code)
AAXX
IMP809LEUR-T
4.63
– 40°C to +105°C
3-SOT23
IMP809MEUR-T
4.38
– 40°C to +105°C
3-SOT23
ABXX
IMP809JEUR-T
4.00
– 40°C to +105°C
3-SOT23
CWXX
IMP809TEUR-T
3.08
– 40°C to +105°C
3-SOT23
ACXX
IMP809SEUR-T
2.93
– 40°C to +105°C
3-SOT23
ADXX
IMP809REUR-T
2.63
– 40°C to +105°C
3-SOT23
AFXX
IMP810LEUR-T
4.63
– 40°C to +105°C
3-SOT23
AGXX
IMP810MEUR-T
4.38
– 40°C to +105°C
3-SOT23
AHXX
IMP810JEUR-T
4.00
– 40°C to +105°C
3-SOT23
AIXX
IMP810TEUR-T
3.08
– 40°C to +105°C
3-SOT23
AJXX
IMP810SEUR-T
2.93
– 40°C to +105°C
3-SOT23
AKXX
IMP810REUR-T
2.63
– 40°C to +105°C
3-SOT23
ALXX
IMP810 Active HIGH Reset
Notes:
1. Tape and Reel packaging is indicated by the -T designation.
2. Devices may also be marked with full part number: 809L, 810M etc. XX refers to lot.
Related Products
Max. Supply Current
Package Pins
Manual RESET input
Package Type
Active-HIGH RESET output
Active-LOW RESET output
2
IMP809
IMP810
IMP811
IMP812
15µA
3
15µA
3
SOT-23
SOT-23
■
15µA
4
■
SOT-143
15µA
4
■
SOT-143
■
■
■
IMP809, IMP810
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 implied.
Exposure to absolute maximum ratings for prolonged time periods may
affect 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
Input Voltage (VCC) Range
VCC
Supply Current
ICC
Reset Threshold
VTH
TA = 0°C to 70°C
TA = – 40°C to 105°C
TA = – 40°C to 85°C
TA = – 40°C to 85°C
TA = 85°C to 105°C
TA = 85°C to 105°C
L devices
M devices
J devices
T devices
S devices
R devices
Reset Threshold Stability
VCC to Reset Delay
Reset Active Timeout Period
VOL
Low RESET Output Voltage (IMP809)
VOL
High RESET Output Voltage (IMP809)
VOH
Low RESET Output Voltage (IMP810)
VOL
High RESET Output Voltage (IMP810)
VOH
Notes:
Min
Typ
1.1
1.2
VCC < 5.5V, L/M/J
VCC < 3.6V, R/S/T
VCC < 5.5V, L/M/J
VCC < 3.6V, R/S/T
TA = 25°C
TA = – 40°C to 85°C
TA = 85°C to 105°C
TA = 25°C
TA = – 40°C to 85°C
TA = 85°C to 105°C
TA = 25°C
TA = – 40°C to 85°C
TA = 85°C to 105°C
TA = 25°C
TA = – 40°C to 85°C
TA = 85°C to 105°C
TA = 25°C
TA = – 40°C to 85°C
TA = 85°C to 105°C
TA = 25°C
TA = – 40°C to 85°C
TA = 85°C to 105°C
9
6
4.56
4.50
4.40
4.31
4.25
4.16
3.93
3.89
3.80
3.04
3.00
2.92
2.89
2.85
2.78
2.59
2.55
2.50
VCC = VTH to VTH - 100mV
TA = – 40°C to 85°C
140
TA = 85°C to 105°C
100
VCC = VTH min., ISINK = 1.2mA, IMP809R/S/T
VCC = VTH min., ISINK = 3.2mA, IMP809L/M/J
VCC > 1.1V, ISINK = 50µA
VCC > VTH max., ISOURCE = 500µA, IMP809R/S/T 0.8VCC
VCC > VTH max., ISOURCE = 800µA, IMP809L/M/J VCC -1.5
VCC = VTH max., ISINK = 1.2mA, IMP810R/S/T
VCC = VTH max., ISINK = 3.2mA, IMP810L/M/J
1.8V < VCC < VTH min., ISOURCE = 150µA
0.8VCC
4.63
4.38
4.00
3.08
2.93
2.63
30
20
240
Max
Units
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
V
560
840
0.3
0.4
0.3
µA
V
ppm/°C
µs
ms
V
V
0.3
0.4
V
V
1. Production testing done at TA = 25°C. Over-temperature specifications guaranteed by design only.
2.RE
SE
T output is active LOW for the IMP809 and RESET output is active HIGH for the IMP810
3
IMP809, IMP81 0
Pin Descriptions
Pin Number
Name
1
GND
Function
2
(IMP809)
RESET
RESET is asserted LOW if VCC falls below the reset threshold and remains LOW for the
240ms typical reset timeout period (140ms minimum) after VCC exceeds the threshold.
2
(IMP810)
RESET
RESET is asserted HIGH if VCC falls below the reset threshold and remains HIGH for the
240ms typical reset timeout period (140ms minimum) after VCC exceeds the threshold.
3
VCC
Ground
Power supply input voltage (3.0V, 3.3V, 5.0V)
Detailed Descriptions
Reset Timing
The reset signal is asserted–LOW for the IMP809 and HIGH for the
IMP810–when the VCC signal falls below the threshold trip voltage
and remains asserted for 140ms minimum after the VCC has risen
above the threshold.
5V
VCC
VTH
Active Reset
Timeout Period
0V
140ms
minimum
5V
RESET
IMP809
0V
5V
RESET
IMP810
0V
809/10_03.eps
Figure 1. Reset Timing Diagram
4
IMP809, IMP810
Application Information
Negative VCC Transients
The IMP809/810 protect µPs from brownouts and low VCC. Short
duration transients of 100mV amplitude and 20µs or less duration
typically do not cause a false RESET.
Valid Reset with VCC under 1.1V
To ensure logic inputs connected to the IMP809 RESET pin are in
a known state when VCC is under 1.1V, a 100kΩ pull-down
resistor at RESET is needed. The value is not critical. A pull-up
resistor to VCC is needed with the IMP810.
VCC
VCC
100kΩ
Power
Supply
IMP809
IMP810
Power
Supply
RESET
RESET
100kΩ
GND
GND
809/10_05.eps
809/10_04.eps
Figure 3. RESET Valid with VCC Under 1.1V
Figure 2. RESET Valid with VCC Under 1.1V
Bi-directional Reset Pin Interfacing
The IMP809/810 can interface with µP/µC bi-directional reset
pins by connecting a 4.7kΩ resistor in series with the
IMP809/810 reset output and the µP/µC bi-directional reset pin.
BUF
Buffered
RESET
VCC
Power
Supply
IMP809
µC or µP
4.7kΩ
RESET
RESET
Input
GND
GND
Bi-directional I/O Pin
(Example: 68HC11)
809/10_06.eps
Figure 4. Bi-directional Reset Pin Interfacing
5
IMP809, IMP81 0
Package Dimensions
Plastic SOT-23 (3-Pin)
Inches
Min
B
E
H
e
S
D
a
A
A
0.031
0.050
0.80
1.27
A1
0.004
0.010
0.10
0.25
B
0.015
0.020
0.37
0.51
C
0.003
0.007
0.085
0.18
D
0.110
0.120
2.80
3.04
E
0.047
0.055
1.20
1.40
e
0.035
0.040
0.89
1.03
e1
0.070
0.080
1.78
2.05
H
0.083
0.1039
2.10
2.64
L
S
A1
e1
C
L
SOT-23 (3-Pin).eps
6
Millimeters
Max
Min
Max
Plastic SOT-23 (3-Pin)
0.027 REF
0.018
0.024
0.069 REF
0.45
0.60
IMP809, IMP810
IMP, Inc.
Corporate Headquarters
2830 N. First Street
San Jose, CA 95134-2071
Tel: 408-432-9100
Tel: 800-438-3722
Fax: 408-434-0335
Fax-on-Demand: 1-800-249-1614 (USA)
Fax-on-Demand: 1-303-575-6156 (International)
e-mail: [email protected]
http://www.impweb.com
The IMP logo is a registered trademark of IMP, Inc.
All other company and product names are trademarks of their respective owners.
© 1998 IMP, Inc.
Printed in USA
Preliminary
Part No.: IMP809-810
Document Number: IMP809-6-6/98
7