Features: · 3.3V supply monitor
· Push-pull output
· Selectable watchdog period
· Debounce manual push-button reset input
· Power-up, power-down and brown out detection
· 250ms minimum reset time
· Active LOW and HIGH reset signal
· Selectable trip point tolerance: 10% or 20%
· Low-cost 8-pin DIP/SO and 8-pin Micro SO packages
· Wide operating temperature -40°C to +85°CApplication· Microprocessor systems
· Computers
· Controllers
· Portable instruments
· Automotive systemsPinout
Specifications
| Parameter |
Min |
Max |
Unit |
| Voltage on VCC |
-0.5 |
7 |
V |
| Voltage on ST , TD |
-0.5 |
VCC + 0.5 |
V |
| Voltage on PBRST , RESET, RESET |
-0.5 |
VCC + 0.5 |
V |
| Operating Temperature Range |
-40 |
+85 |
°C |
| Soldering Temperature (for 10 sec) |
|
+260 |
°C |
| Storage Temperature |
-55 |
+125 |
°C |
ESD rating
HBM
MM |
|
2
200 |
KV
V |
DescriptionThe ASM1832 is a fully integrated microprocessor supervisor. It can halt and restart a "hung-up" microprocessor, restart a microprocessor after a power failure. It has a watchdog timer and external reset override. RESET and RESET outputs are push-pull.
A precision temperature-compensated reference of ASM1832 and comparator circuits monitor the 3.3V, VCC input voltage status.During power-up or when
the VCC power supply falls outside selectable tolerance limits, both RESET and RESET become active. When VCC rises above the threshold
voltage, the reset signals remain active for an additional 250ms minimum,allowing the power supply and system microprocessor to stabilize.
The trip point tolerance signal, TOL, selects the trip level tolerance to be either 10% or 20%.
A debounced manual reset input, PBRST , activates the reset outputs for a minimum period of 250ms. There is a watchdog timer to stop and
restart a microprocessor that is "hung-up".The watchdog timeouts periods are selectable: 150ms, 610ms,and 1200ms. If the ST input is not
strobed LOW before the time-out period expires, a reset is generated.
ASM1832 are available in 8-pin PDIP, 8-pin SO and compact 8-pin MicroSO packages.
ASM1832 Data Sheet
