AS1911 Supervisor IC
Dual-Voltage Microprocessor Supervisory Circuits with Manual Reset and Watchdog
説明
The AS1910 - AS1915 microprocessor supervisory circuits were designed to generate a reset when one of the two monitored supply voltages falls below a factory-trimmed threshold, and to maintain the reset for a minimum timeout period when both supplies are above their reset thresholds. Guaranteed to be in the correct state for VCC higher than +1.0V, these devices are ideal for multiple-voltage systems with strict monitoring requirements.
The AS1913/AS1914/AS1915 feature factory-trimmed thresholds to monitor a primary voltage between 1.8V and 3.6V, and a secondary voltage between 0.9V and 2.5V. For the AS1910/AS1911/AS1912, a secondary monitoring voltage can be user-adjusted via an external resistor divider down to 0.6V. The devices are available with the following reset output types:
- AS1910/AS1913 Active-Low Push/Pull
- AS1911/AS1914 Active-High Push/Pull
- AS1912/AS1915 Active-Low Open-Drain
The AS1910 - AS1915 include a manual-reset input for systems that never fully power down the microprocessor. Additionally, these devices feature a watchdog timer to help ensure that the processor is operating within proper code boundaries.
The AS1910 - AS1915 are available in a 6-pin SOT23 package.
主な機能
- Primary VCC Supervisory Range: +1.8V to +3.6V
- Secondary VCC Supervisory Range: +0.9V to +2.5V (AS1913/AS1914/AS1915)
- User-Adjustable Threshold Down to +0.63V (AS1910/AS1911/AS1912)
- Guaranteed Reset Valid Down to VCC = +1.0V
- Reset Timeout Delay: 215ms
- Manual Reset Input
- Three Reset Output Types
- Active-High Push/Pull
- Active-Low Push/Pull
- Active-Low Open-Drain
- Watchdog Timeout Period: 1.5s
- Immune to Fast Negative VCC Transients
- External Components Not Required
- 6-pin SOT23 Package
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The devices are ideal for portable and battery-powered systems, embedded controllers, intelligent instruments, automotive systems, critical CPU monitoring, and any multi-supply application.
AS1901
230nA, push-pull Active-Low
AS1902
230nA, push-pull Active-High
AS1903
230nA, open-drain active-low
AS1904
150nA, push-pull Active-Low
AS1905
150nA, push-pull Active-High
AS1906
150nA, open-drain active-low
AS1907
Low-Volt. Active-Low Push/Pull
AS1908
Low-Volt. Act.-High Push/Pull
AS1909
Low-Voltage, Open-Drain Reset
AS1910
2x Input man. Reset Watchdog
AS1912
2x Input, man. Reset Watchdog
AS1913
Dual, Manual Reset Watchdog
AS1914
Dual, Manual Reset Watchdog
AS1915
Dual, Manual Reset Watchdog
AS1916
Supervisory Man Reset Watchdog
AS1917
Supervisory Man Reset Watchdog
AS1918
Supervisory Man Reset Watchdog
AS1920
3x-Input Supervisory Push/Pull
AS1922
3xInput Supervisory Open/Draft
AS1923
Quad-Input Supervisory Circuit
AS1925
Low Voltage Manual Reset
AS1926
Low Voltage, Manual Reset
AS1927
Low Voltage, Manual Reset
