ST STUSB03E User Manual

General features

■ Compliant to USB V2.0 for full-speed (12Mb/s)

and low-speed (1.5Mbps) operation

■ HBM = ±14kV on D+, D– lines; ±5kV on VBUS

■ ESD Compliant to IEC-61000-4.2 (level 3) on

D+, D- lines

■ Separate I/O supply with operation down to

1.6V

■ Integrated 3.3V output LDO

■ Very low power consumption to meet USB

‘suspend’ current requirements

■ Small QFN16 lead free package 3x3 mm

■

No power supply sequencing requirements

■ Software controlled re-enumeration

■ Integrated D+ pull-up resistor for FS operation

2

Description

The STUSB03E is a single chip transceiver that
complies with the physical layer specifications of
the Universal Serial Bus (USB) v2.0 standard. It
has an integrated 5V to 3.3V regulator which
allows direct powering from the V
transceiver has an integrated voltage detector to

BUS

. The

STUSB03E

USB Transceiver

QFN16 (3mm x 3mm)

detect the presence of the V
features an internal D+ pull-up resistor
implemented in accordance with the 27% resistor
ECN.

The STUSB03E also supports Sharing mode
when V

is not present, which allows the D+/D–

BUS

lines to be shared with other serial protocols.

It supports both full-speed (12Mbps) and low­speed (1.5Mbps) operation. It is also designed to
operate down to 1.6V so that it is compatible with
lower system voltages of most portable systems,
which include PDAs, MP3 Player and Cell phones.

voltage and

BUS

Order code

Part number Package Packaging

STUSB03EQR QFN16 (3mm x 3mm) 3000 parts per reel

March 2007 Rev. 2 1/20

www.st.com

20

Contents STUSB03E

Contents

1 Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3 Functional tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

4 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

5 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

6 Timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

7 Test circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

8 Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

9 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

10 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

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STUSB03E Typical application

1 Typical application

Figure 1. Application circuit

3/20

Pin configuration STUSB03E

2 Pin configuration

Figure 2. Pin connections (Top View)

Table 1. Pin description

Pln N° Symbol I/O Name and function

1 SPD I

2 RCV O Receive Data. Output for USB differential data. (see

3 VP I/O

4 VM I/O

5CONI

6 GND Ground reference
7 SUS I Suspend (active-high). Turns off internal circuits to reduce supply current.

8 RSEL I

9OE#I

10, 11 D-, D+ I/O Differential data lines that conform to the USB v2.0 standard. (see

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

13

14

15

16

V

V

BUS

V

V

BUSDET

PU

IF

EXP N.C. Not connected.

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.

Ta bl e 2

)

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

Ta bl e 2

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

)

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

Ta bl e 2

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

)
CONNECT (input). Connects the internal pull-up resistor to D+ if SPD and RSEL are
logic high. Controls status of VPU pin if SPD or RSEL is logic low.

Full speed pull-up resistor selection input. If RSEL = 0 the internal pull-up resistor
connected to D+ is disabled and an external resistor connected to V

pin must be

PU

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

(see

Ta bl e 2

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

)

Ta bl e 2

Pull-up Supply Voltage Output. Used to connect 1.5K pull-up speed detect resistor
when RSEL or SPD is logic low. If CON = 0, V

O

= 3.3V ±10% (see
USB Bus Supply Voltage (4V to 5.5V). Supplies power to the USB transceiver and

I

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

I

system I/O interface signals.
V

indicator output. When V

BUS

O

V

= Low (VIF referred).

BUSDET

Table 4.

).

> 4.0V, V

BUS

is high impedance. If CON = 1, VPU

PU

= High; when < 3.6V,

BUSDET

)

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STUSB03E Functional tables

3 Functional tables

Table 2. Function selection

SUS OE# D+, D- RCV VP/VM Function

L L Driving Active Active Normal transmit mode
L H Receiving Active Active Normal receive mode

H L Hi-Z L Not Active Low power state
HHHi-ZLActive

(1) During suspend VP and VM are active in order to detect out of band signalling conditions

Receiving during suspend (low power state)

Table 3. Sharing mode pin configuration

Input/output Status

V

BUS

V

IF

D+, D-, High impedance
VP, VM High
RCV Low
SPD High impedance
V

BUSDET

V

PU

#OE, SUS, CON High impedance inputs

Floating or connected to GND

1.6V to 3.6V input

Low

High impedance

(1)

Table 4. V

Status

PU

SPD RSEL CON

H H X High impedance
H L L High impedance
HLH3.3V ± 10%

L X L High impedance
LXH3.3V ± 10%

Table 5. Truth table during normal Mode

OE# = L

Input Output

VP VM D+ D- RCV

LLLLXSE0

L H L H L Logic Low
H L H L H Logic High
HHXXXUndefined

OE# = H

Input Output

D+ D- VP VM RCV

LLLLXSE0

L H L H L Logic Low
H L H L H Logic High
HHXXXUndefined

X = Undefined

V

PU

Result

RESULT

5/20

Maximum ratings STUSB03E

4 Maximum ratings

Table 6. Absolute maximum ratings

Symbol Parameter Value Unit

V

BUS

V+ All other Inputs -0.5 to 4.6 V

I

I

ESD

T

STG

T

OPR

Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional Operation under these con­ditions is not implied.

Note 3. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.

Table 7. Thermal data

Supply Voltage 6 V

Output Current (D+, D-) ± 50 mA

O

Output Current (all others) ± 15 mA

O

I

Input Current ± 50 mA

I

D+, D-, HBM (Note 3) ± 14
V

BUS

(Note 3)

± 5
All other pins (Note 3) ± 2
Storage Temperature Range -65 to + 150 °C

Operating Temperature Range -40 to + 85 °C

kV

Symbol Parameter Value Unit

R

thJA

Thermal Resistance Junction-Ambient 59 °C/W

6/20