UCS1002-2 datasheet(14/114 Pages) MICROCHIP

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Programmable USB Port Power Controller with Charger Emulation

Datasheet

Revision 1.4 (07-16-13)

SMSC UCS1002

DATASHEET

Note 2.1

Total leakage current from pins 3 and 4 (VBUS) to ground must be less than 100 µA for

proper attach / removal detection operation.

Note 2.2

It is recommended to use 2 M

Ω pull-down resistors on the DPOUT pin and / or DMOUT

pin if a portable device stimulus is expected when using the Custom charger emulation

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

Ω value is based on BC1.1

impedance characteristics for Dedicated Charging Ports.

Note 2.3

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 is disabled or all of the M1, M2, and EM_EN are connected to ground, the

UCS1002 will remain in the Sleep or Detect state unless activated via the SMBus.

GND

Ground

Power

n/a

Bottom Pad

GND FLAG

Thermal connection to ground plane

Thermal Pad

n/a

Table 2.2 Pin Types

PIN TYPE

DESCRIPTION

Power

This pin is used to supply power or ground to the device.

Hi-Power

This pin is a high current pin.

AIO

Analog Input / Output - this pin is used as an I/O for analog signals.

Digital Input - this pin is used as a digital input.

DIOD

Open-drain Digital Input / Output - this pin is bidirectional. It is open-drain and requires a pull-

up resistor.

Open-drain Digital Output - used as a digital output. It is open-drain and requires a pull-up

resistor.

Table 2.1 UCS1002 Pin Description (continued)

NUMBER

PIN NAME

PIN FUNCTION

PIN TYPE

IF PIN NOT USED

CONNECTION

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