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AS1914TZ-T Datasheet(PDF) 2 Page - ams AG |
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AS1914TZ-T Datasheet(HTML) 2 Page - ams AG |
2 / 15 page www.austriamicrosystems.com Revision 1.00 2 - 15 AS1910 - AS1915 Data Sheet - P i n o u t 4 Pinout Pin Assignments Figure 2. Pin Assignments (Top View) Pin Descriptions Table 2. Pin Descriptions Pin Number Pin Name Description 1 RESETN Active-Low Reset Output (AS1910, AS1912, AS1913, AS1915). The RESETN signal toggles from high to low when VCC, VCC2, or RESETIN input drops below the factory-trimmed reset threshold (see Table 4 on page 4), or MRN is pulled low, or the watchdog triggers a reset. This output signal remains low for the reset timeout period after all supervised voltages exceed their reset threshold, or MRN goes low to high, or the watchdog triggers a reset. RESET Active-High Reset Output (AS1911, AS1914). The RESET signal toggles from low to high when VCC, VCC2, or RESETIN input drops below the factory-trimmed reset threshold (see Table 4 on page 4), or MRN is pulled low, or the watchdog triggers a reset. This output signal remains high for the reset timeout period (see tRP on page 5) after all supervised voltages exceed their reset threshold, or MRN goes low to high, or the watchdog triggers a reset. 2GND Ground 3MRN Active-Low Manual Reset Input. Pulling this pin low asserts a reset. This pin is connected to the internal 50k Ω pullup to VCC. This reset remains active as long as MRN is low and for the reset timeout period (see tRP on page 5) after MRN goes high. Note: If the manual reset feature is not used, this pin should be unconnected or connected to VCC. 4WDI Watchdog Input. If WDI remains high or low for longer than the watchdog timeout period (see tWD on page 6), the internal watchdog timer period expires and a reset is triggered for the reset timeout period (see tRP on page 5). The internal watchdog timer clears whenever a reset is a asserted or when WDI senses a rising or falling edge. Note: To disable the watchdog feature, this pin must be unconnected or connected to a tri- state buffer output. 5 RESETIN User-Adjustable Supervised Voltage Input (AS1910/AS1911/AS1912). This high- impedance pin serves as the input to the internal reset comparator. Connect this pin to an external resistor-divider network to set the reset threshold voltage (down to 0.63V). VCC2 Primary Supervised Voltage Input (AS1913/AS1914/AS1915). This pin serves as the secondary supervised voltage input. 6VCC Primary Supervised Voltage Input. This pin serves as the primary supervised voltage input. AS1910 - AS1915 2 GND 3 MRN 1 RESETN/RESET 4 WDI 5 RESETIN/VCC2 6 VCC |
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