MAX1940 데이터 시트보기 (PDF) - Maxim Integrated

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MAX1940

Triple USB Switch with Autoreset and Fault Blanking

Maxim Integrated 

Triple USB Switch with Autoreset and

Fault Blanking

Pin Description

PIN

NAME

FUNCTION

1

ONA Control Input for Switch A. The active polarity of ONA is set by SEL (see Table 1).

2

IN1

Power Input. Connect all IN_ inputs together and bypass with a 0.1µF ceramic capacitor to GND. Load

conditions might require additional bulk capacitance to prevent pulling IN_ down.

3

IN2

Power Input. Connect all IN_ inputs together and bypass with a 0.1µF ceramic capacitor to GND. Load

conditions might require additional bulk capacitance to prevent pulling IN_ down.

4

IN3

Power Input. Connect all IN_ inputs together and bypass with a 0.1µF ceramic capacitor to GND. Load

conditions might require additional bulk capacitance to prevent pulling IN_ down.

5

ONB Control Input for Switch B. The active polarity of ONB is set by SEL (see Table 1).

6

IN4

Power Input. Connect all IN_ inputs together and bypass with a 0.1µF ceramic capacitor to GND. Load

conditions might require additional bulk capacitance to prevent pulling IN_ down.

7

IN5

Power Input. Connect all IN_ inputs together and bypass with a 0.1µF ceramic capacitor to GND. Load

conditions might require additional bulk capacitance to prevent pulling IN_ down.

8

ONC Control Input for Switch C. The active polarity of ONC is set by SEL (see Table 1).

9

FAULTC Fault Indicator Output for Switch C. Open-drain output asserts low when switch C enters thermal shutdown,

undervoltage lockout, or a sustained (>20ms) current-limit or short-circuit condition.

10

OUTC

Power Output for Switch C. Bypass OUTC to GND with a 1µF ceramic capacitor. Load conditions might

require additional bulk capacitance. When disabled, OUTC goes into a high-impedance state.

11

SEL

Logic Input Polarity Select. SEL sets the active polarity of the ON_ inputs. Connect SEL high to set active-

high inputs. Connect SEL to GND to set active-low inputs.

12

FAULTB Fault Indicator Output for Switch B. Open-drain output asserts low when switch B enters thermal shutdown,

undervoltage lockout, or enters a sustained (>20ms) current-limit or short-circuit condition.

13

OUTB Power Output for Switch B. Bypass OUTB to GND with a 1µF ceramic capacitor. Load conditions might

require additional bulk capacitance. When disabled, OUTB goes into a high-impedance state.

14

GND Ground

15

OUTA Power Output for Switch A. Bypass OUTA to GND with a 1µF ceramic capacitor. Load conditions might

require additional bulk capacitance. When disabled, OUTA goes into a high-impedance state.

16

FAULTA Fault Indicator Output for Switch A. Open-drain output asserts low when switch A enters thermal shutdown,

undervoltage lockout, or a sustained (>20ms) current-limit or short-circuit condition.

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