AS1920 datasheet(2/14 Pages) AMSCO

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AS1920/AS1922

Datasheet - 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

RESETN

Reset Logic Output. This active-low pin serves as the 3V push/pull reset

output. A reset is asserted when any one of the supplies are below its

respective trip threshold and the reset is held for 200ms after all power supplies

have stabilized.

2GND

Ground.

3VCCA

VCCA. 1V sense, high-impedance input.

Note: If this pin is not used it should be tied to VCC3 or VCC18.

4VCC18

VCC18. 1.8V sense input and power detect pin (AS1920-18, AS1922-18). This

pin provides power to the output reset stage of the device in order to assert a

valid reset when the voltage on the primary input is down.

Note: Bypass this pin to GND with a

≥0.1µF ceramic capacitor.

5VCC3

VCC3. 3V sense input and power supply pin (AS1920-18, AS1922-18). This pin

provides power to the device.

Note: Bypass this pin to GND with a

≥0.1µF ceramic capacitor.

AS1920/

AS1922

GND

VCCA

RESETN

4 VCC18

5 VCC3

4 VCC18

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