Features: `Improved Maxim MAX811/MAX812 replacement
- Specified to 105°C
- New 4.0V threshold option
`6µA supply current
`Monitor 5V, 3.3V and 3V supplies
`Manual reset input
`140ms min. reset pulse width
`Guaranteed over temperature
`Active-LOW reset valid with 1.1V supply (IMP811)
`Small 4-pin SOT-143 package
`No external components
`Power-supply transient-immune design
Application·Computers and controllers
·Embedded controllers
·Battery operated systems
·Intelligent instruments
·Wireless communication systems
·PDAs and handheld equipmentPinout
SpecificationsVCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3V to 6.0V
RESET, RESET and MR . . . . . . . . . . .0.3V to (VCC + 0.3V)
Input Current at VCC and MR. . . . . . . . . . .........20mA
Output Current: RESET or RESET . . . . . . ......... 20mA
Rate of Rise at VCC . . . . . . . . . . . . . . . . . . . .... 100V/µs
Power Dissipation (TA= 70°C) . . . . . . . . . ...... 320mW
(Derate SOT-143 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 reliabilityDescriptionThe IMP811/IMP812 are low-power supervisors designed to monitor voltage levels of 3.0V, 3.3V and 5.0V power supplies in low-power microprocessor (µP), microcontroller (µC) and digital systems. Each features a debounced manual reset input. The IMP811/812 are improved drop-in replacements for the Maxim MAX811/812 with extended temperature specifications to 105°C.
A reset signal is issued if the power supply voltage drops below a preset threshold and is asserted for at least 140ms after the supply has risen above the reset threshold. The IMP811 has an active-low output RESET that is guaranteed to be in the correct state for VCC down to 1.1V. The IMP812 has an active-high output RESET. The reset comparator is designed to ignore fast transients on VCC .
Low power consumption makes the IMP811/IMP812 ideal for use in portable and battery-operated equipment. Available in a compact 4-pin SOT143 package, the devices use minimal board space.
The IMP811 is designed as the 4-piin P vollttage superrviissor that is designed to monitor voltage levels of 3.0V, 3.3V and 5.0V power supplies in low-power microprocessor (P), microcontroller (C) and digital systems. And this device can be used in (1)computers and controllers; (2)embedded controllers; (3)battery operated systems; (4)intelligent instruments; (5)wireless communication systems; (6)PDAs and handheld equipment.
Features of the IMP811 are:(1)6A supply current; (2)monitor 5V, 3.3V and 3V supplies; (3)manual reset input; (4)140ms min. reset pulse width; (5)guara-nteed over temperature; (6)active-LOW reset valid with 1.1V supply (IMP811); (7)small 4-pin SOT-143 package; (8)no external components; (9)power-supply transient-immune design.
The absolute maximum ratings of the IMP811 can be summarized as:(1)Vcc:-0.3V to 6.0V;(2)RESET, RESET and MR:-0.3V to (Vcc+0.3V);(3)input current at Vcc and MR:20 mA;(4)output current: RESET or RESET:20 mA;(5)rate of rise at Vcc:100V/s;(6)power dissipation (TA=70°C):320 mW;(7)operating temper-ature range:-40°C to 105°C;(8)storage temperature range:-65°C to 160°C;(9)lead Ttemperature (soldering, 10 sec):300°C. If you want to know more information such as the electrical characteristics about the IMP811, please download the datasheet in www.seekic.com or www.chinaicmart.com .
IMP811 Data Sheet
