UCS1002-3 datasheet(18/114 Pages) MICROCHIP

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UCS1002-3

DS20006852A-page 18

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The description of the pin types are listed in Table 3-2.

DPOUT

USB data output (plus)

AIO (see

Note 2)

Connect to ground

A_DET#

Active-low device Attach Detection

output flag (requires pull-up resistor)

Connect to ground

EM_EN

Active mode selector input

Connect to ground or

VDD (see Note 3)

GND

Ground

Power

n/a

Bottom Pad

GND FLAG

Thermal connection to ground plane

Thermal Pad

n/a

TABLE 3-1:

PIN FUNCTION TABLE (CONTINUED)

UCS1002-3

5x5 VQFN

Symbol

Function

Pin Type

Connection Type if Pin

Not Used

Note 1: Total leakage current from pins 4, 5 and 6 (VBUS) to ground must be less than 100 µA for proper

attach/removal detection operation.

2: It is recommended to use 2 M

 pull-down resistors on the DPOUT or DMOUT pin, or both 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.

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 pin is disabled or all of the M1, M2,

and EM_EN pins are connected to ground, the UCS1002-3 remains in the Sleep or Detect state unless

activated via the SMBus.

TABLE 3-2:

PIN TYPES DESCRIPTION

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. This pin is glitch-free.

DIOD

Open-Drain Digital Input/Output – this pin is bidirectional. It is open-drain and

requires a pull-up resistor. This pin is glitch-free.

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

pull-up resistor. This pin is glitch-free.

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