Features: · Precision power supply minotor
· 2.63V threshold (ASM706P/R, ASM708R)
· 2.93V threshold (ASM706S, ASM708S)
· 3.08V threshold (ASM706T, ASM708T)
· New 4.00V threshold (ASM706J , ASM708J)
· Debounced manual reset input
· Auxiliary voltage monitor comparator
· 1.25V threshold
· Battery monitor / auxiliary supply monitor
· Watchdog timer (ASM706P/R/S/T/J)
· Watchdog can be disabled by floating WDI
· 200ms reset time delay
· Three reset signal options
· Active HIGH: ASM706P
· Active LOW: ASM706R/S/T/J
· Active HIGH and LOW outputs: ASM708R/S/T/J
· DIP, SO and MicroSO packages
· Guaranteed RESET assertion to VCC = 1.1V
Application· Computers and embedded controllers
· CTI applications
· Automotive systems
· Portable/Battery-operated systems
· Intelligent instruments
· Wireless communication systems
· PDAs and hand-held equipment
· Safety systems
Pinout
Specifications
|
Parameter |
Min |
Max |
Unit |
| Pin Terminal Voltage with Respect to Ground |
|
|
|
|
VCC |
-0.3 |
6.0 |
V |
|
All other inputs |
|
|
V |
| Input Current at VCC and GND |
|
20 |
mA |
| Output Current: All outputs |
|
20 |
mA |
| Rate of Rise at VCC |
|
100 |
V/s |
Plastic DIP Power Dissipation
(Derate 9mW/°C above 70°C) |
|
700 |
mV |
SO Power Dissipation
(Derate 5.9mW/ above 70) |
|
470 |
mW' |
MicroSO POwer Disspation
(Derate 4.1mW/ above 70) |
|
330 |
mW |
| Operating Temperature Range |
|
|
|
| ASM706xE, ASM708xE |
-40 |
+85 |
|
| ASM706xC, ASM708xC |
0 |
70 |
|
| Storage Temperature Range |
-65 |
160 |
|
| Lead Temperature Soldering (10sec) |
|
300 |
|
Note: These are stress ratings only and functional operation is noy implied. Exposure to absolute maximum ratings for pro-longed time periods may affect device reliability.
DescriptionThe ASM706P/R/S/T/J and ASM708R/S/T/J are cost effective CMOS supervisor circuits that monitor power-supply and battery voltage level, and P/C operation.
The family of ASM708R offers several functional options. Each device generates a reset signal during power-up, power-down and during brownout conditions. A reset is generated when the supply drops below 2.63V (ASM706P/R, ASM708R), 2.93V (ASM706S, ASM708S), 3.08V (ASM706T, ASM708T) or 4.00 (ASM706J, ASM708J). In addition, the ASM706P/R/S/T/J feature a 1.6 second watchdog timer. The watchdog timer output will trigger a reset if connected to MR. Floating the WDI input pin disables the watchdog timer.
The ASM708R/S/T/J have both active-HIGH and active-LOW reset outputs but no watchdog function. The ASM706P has the same pin-out and functions as the ASM706R but has an active-HIGH reset output.
A versatile power-fail circuit, useful in checking battery levels and non-5V supplies, has a 1.25V threshold. All devices have a manual reset input. All devices of ASM708R are available in 8-pin DIP, SO and the compact MicroSO packages. The MicroSO package requires 50% less PC board area than the conventional SO package.
ASM708R Data Sheet
