UCS1003-3 datasheet(24/138 Pages) MICROCHIP

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ALERT#

Active-low error event output flag

(requires pull-up resistor).

Connect to ground

DPIN

USB data input (plus).

AIO

Connect to ground or ground through a

resistor

DMIN

USB data input (minus).

AIO

Connect to ground or ground through a

resistor

DMOUT

USB data output (minus).

AIO (Note 2)

Connect to ground

DPOUT

USB data output (plus).

AIO (Note 2)

Connect to ground

A_DET#

(UCS1003-1 and UCS1003-3)

Active-low device Attach Detection output flag

(requires pull-up resistor).

Connect to ground

CHRG#

(UCS1003-2)

Active-low “Charging Active” output flag (requires pull-up

resistor).

Connect to ground

EM_EN

Active mode selector input.

Connect to ground or VDD (Note 3)

GND

Ground.

Power

n/a

Exposed thermal pad. Must be connected to electrical

ground.

n/a

TABLE 3-1:

PIN FUNCTION TABLE (CONTINUED)

UCS1003-1/2/3

4x4 QFN

Symbol

Function

Pin Type

Connection Type if Pin Not Used

Note 1:

Total leakage current from Pins 3 and 4 (VBUS) to ground must be less than 100 µA for proper Attach/Removal Detection operation.

It is recommended to use 2 M

 pull-down resistors on the DPOUT and/or DMOUT pin if a portable device stimulus is expected when using the customer

charger emulation profile with the high-speed data switch open. The 2 M

 value is based on BC1.1 impedance characteristics for Dedicated Charging Ports.

To ensure operation, the PWR_EN pin must be enabled, as determined by the SEL pin decode, when it is not driven by an external device. Furthermore,

one of the M1, M2 or EM_EN pins must be connected to VDD if all three are not driven from an external device. If the PWR_EN pin is disabled, or all of the

M1, M2 and EM_EN pins are connected to ground, the UCS1003-1 will remain in the Sleep or Detect state unless activated via the SMBus (UCS1003-2

and UCS1003-3 will remain in Sleep or Detect state indefinitely).

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