AS1908 Datasheet PDF | austriamicrosystems AG

austriamicrosystems AG AS1908

The AS1907/AS1908/AS1909 microprocessor supervisory circuits are ideal for monitoring the supply voltage of digital systems and microprocessors. The devices are designed to initiate a reset if the supply voltage goes below a predefined threshold. The devices are available as the standard products listed in Table 1.

Part No.	AS1908
Datasheet	AS1908 Download
Manufacturer	austriamicrosystems AG
Description	Low-Voltage Microprocessor Reset Circuits
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GENERAL DESCRIPTION

The duration of the reset is either 1.5, 30, or 150ms (typ.) after the supply voltage has risen above the pre-set threshold (see Ordering Information on page 9). Table 1. Standard Products Model AS1907 AS1908 AS1909 Output Type Push/Pull Push/Pull Open-Drain Reset Type Active-Low Active-High Active-Low 2 Key

FEATURES

! 3 Output Types: Push/Pull RESET, Push Pull RESETN, and Open Drain RESETN Reset Threshold Range: 1.6 to 2.5V (~100mV increments) RESET/RESETN: - Valid to VCC = 0.7V (AS1907 and AS1908) - Valid to VCC = 1.0V (AS1909) Reset Pulse Widths: 1, 20, and 100ms Supply Voltage Range: +0.7 to +3.6V Supply Current Range: 2.6 to 7.0µA Power Supply Transient Immunity Requires No External Components Operating Temperature Range: -40 to +125ºC 3-pin SOT23 Package ! ! ! ! ! ! ! ! The reset thresholds are factory-set between 1.6 and 2.5V in steps of approximately 100mV (see Table 5 on page 7). The devices exhibit excellent reliability, and can reduce system costs by eliminating the need for external components.