AS1913SF-T 查看數據表（PDF） - austriamicrosystems AG

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AS1913SF-T

Dual-Voltage Microprocessor Supervisory Circuits with Manual Reset and Watchdog

austriamicrosystems AG 

AS1910 - AS1915

Data Sheet - Pinout

4 Pinout

Pin Assignments

Figure 2. Pin Assignments (Top View)

RESETN/RESET 1

6 VCC

GND 2 AS1910 - 5 RESETIN/VCC2

AS1915

MRN 3

4 WDI

Pin Descriptions

Table 2. Pin Descriptions

Pin

Pin

Number Name

Description

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

RESETN 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.

1

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

RESET 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.

2

GND Ground

Active-Low Manual Reset Input. Pulling this pin low asserts a reset. This pin is connected

to the internal 50kΩ pullup to VCC. This reset remains active as long as MRN is low and for

3

MRN 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.

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

4

WDI 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.

User-Adjustable Supervised Voltage Input (AS1910/AS1911/AS1912). This high-

RESETIN impedance pin serves as the input to the internal reset comparator. Connect this pin to an

5

external resistor-divider network to set the reset threshold voltage (down to 0.63V).

Primary Supervised Voltage Input (AS1913/AS1914/AS1915). This pin serves as the

VCC2 secondary supervised voltage input.

6

VCC Primary Supervised Voltage Input. This pin serves as the primary supervised voltage input.

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