Pin configuration

STUSB03E

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Pin configuration

Table 1.

Pin description

Figure 2.

Pin connections (Top View)

Pln N°

Symbol

I/O

Name and function

1

SPD

I

Speed selection input. A logic HIGH operates at edge rates for “fullspeed” operation.

A logic LOW operates edge rates for “lowspeed” operation. See also CON pin.

2

RCV

O

Receive Data. Output for USB differential data. (see

Table 2)

3

VP

I/O

If OE# = H, VP = Receiver output (+)

If OE# = L, VP = Driver input (+) (see

Table 2)

4

VM

I/O

If OE# = H, VM = Receiver output (-)

If OE# = L, VM = Driver input (-) (see

Table 2)

5CON

I

CONNECT (input). Connects the internal pull-up resistor to D+ if SPD and RSEL are

6

GND

Ground reference

7

SUS

I

Suspend (active-high). Turns off internal circuits to reduce supply current.

8

RSEL

I

Full speed pull-up resistor selection input. If RSEL = 0 the internal pull-up resistor

used.

9OE#

I

Output Enable (active-low). Enables transceiver data transmission onto the bus.

When not active, the transceiver is in the receive mode. (see

Table 2)

10, 11

D-, D+

I/O

Differential data lines that conform to the USB v2.0 standard. (see

Table 2)

12

VTRM

O

3.3V Reference Supply Output. Requires a 1.0µF decoupling capacitor for stability.

13

O

Pull-up Supply Voltage Output. Used to connect 1.5K pull-up speed detect resistor

= 3.3V ±10% (see

Table 4.).

14

I

USB Bus Supply Voltage (4V to 5.5V). Supplies power to the USB transceiver and

internal circuitry.

15

I

System Interface Supply Voltage (1.6V to 3.6V). Provides reference supply voltage for

system I/O interface signals.

16

O

EXP

N.C.

Not connected.