 ST
offers an industry-leading portfolio of Microprocessor Supervisors
and Reset ICs. They range from basic, single-voltage resets, to
resets with a watchdog, and highly integrated devices that include
Reset, Battery Switchover, and Tamper Detect functions.
Smart Reset ICs
These devices combine an improved manual reset with system-controlled reset functions in a single chip. The improved manual reset, which supports safe manual restart of the application using regular function buttons, is achieved thanks to the use of not one but two inputs and a programmable delay time.
Microprocessor
Supervisors
These devices add additional features including Watchdog and Early
Power-fail Warning (Power-Fail In/Power-Fail Out – PFI/PFO,
push-button reset and battery monitoring). Microprocessor supervisors
with a switchover function preserve SRAM data in the absence of
system power by automatically switching to battery backup when system
power fails. A Chip-Enable Gate automatically write-protects the
SRAM when Vcc begins to fall.
Reset
ICs
These devices provide basic voltage monitoring and reset timing
for Power-on Reset and Low-Voltage Detect (POR-LVD) function. Some
devices feature an additional input which can be used for Push-button
Reset, and others are designed to monitor two (or three) system
power supply voltages.
Voltage
Detectors
Provide precision monitoring of battery, power supply, and regulated
system voltages when no reset timing is necessary.
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| Microprocessor Supervisors and Reset ICs Families |
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Microprocessor
Supervisors |
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Reset ICs |
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Smart Reset ICs |
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Voltage Detectors |
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Related Families
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| Featured products |
STM65xx: Dual push-button smart resets  |
| STWD100 Low-power watchdog with chip-enable pin to ease manufacturing process |
STM6904/6905: Quad/quint, ultra-low current, multiple-voltage supervisors |
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| Brochures and Product Guides |
| Quad/quintuple, ultra-low current,multiple-voltage supervisors (PDF 319K) |
| Standalone watchdog with chip enable improves system reliability (PDF 716K) |
| Microprocessor supervisors and reset ICs (PDF 1.06M) |
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| Product News |
Press Announcement, October 27, 2009
Smart-Reset Chip from STMicroelectronics Cures Frustration of ‘Frozen’ Gadgets |
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| Related Information |
SRAM Non-Volatizors with Real-Time Clock allow users
to create their own TIMEKEEPER® NVRAMs. Available
with both serial and parallel interfaces to the Clock register,
these devices turn Low-Power SRAMs into Non-Volatile RAMs by automatically
switching to battery power when system power fails; both, the
SRAM contents and the Real-Time Clock are kept alive. In addition
to the NVRAM Supervisor features and RTC, these devices also are
rich in Microprocessor Supervisor features including POR-LVD,
Watchdog, PFI/PFO, and Battery Monitor. |
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M41ST85
(I2C bus access to the RTC) |
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M41ST95
(SPI bus access to the RTC) |
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M48T201
(8-bit bus, parallel access to the RTC, 1 LPSRAM) |
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M48T212
(8-bit bus, parallel access to the RTC, 2 to 8 LPSRAMs) |
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| Reset IC information |
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STM6904 / 6905: Quad/quint, ultra-low current, multiple-voltage supervisors |
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Reset
Output Structures |
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