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TUSB2046B, TUSB2046BI

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SLLS413K – FEBRUARY 2000 – REVISED JANUARY 2016

Product Folder Links: TUSB2046B TUSB2046BI

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Copyright © 2000–2016, Texas Instruments Incorporated

Pin Functions (continued)

PIN

I/O

DESCRIPTION

NAME

NO.

OVRCUR1

10

I

Overcurrent input. OVRCUR1–OVRCUR4 are active low. For per-port overcurrent detection, one

overcurrent input is available for each of the four downstream ports. In the ganged mode, any

OVRCUR input may be used and all OVRCUR terminals must be tied together. OVRCUR

terminals are active low inputs with noise filtering logic.

OVRCUR2

14

OVRCUR3

18

OVRCUR4

22

PWRON1

9

O

Power-on/-off control signals. PWRON1–PWRON4 are active low, push-pull outputs. Push-pull

outputs eliminate the pullup resistors which open-drain outputs require. However, the external

power switches that connect to these terminals must be able to operate with 3.3-V inputs because

these outputs cannot drive 5-V signals.

PWRON2

13

PWRON3

17

PWRON4

21

RESET

4

I

RESET is an active low TTL input with hysteresis and must be asserted at power up. When

RESET is asserted, all logic is initialized. Generally, a reset with a pulse width between 100

μs

the last 60

μs of the reset window.

SUSPND

32

O

Suspend status. SUSPND is an active high output available for external logic power-down

operations. During the suspend mode, SUSPND is high. SUSPND is low for normal operation.

TSTMODE

31

I

Test/mode terminal. TSTMODE is used as a test terminal during production testing. This terminal

TSTPLL/

48MCLK

27

I/O

Test/48-MHz clock input. TSTPLL/48MCLK is used as a test terminal during production testing.

This terminal must be tied to ground for normal 6-MHz operation. If 48-MHz input clock is desired,

a 48-MHz clock source (no crystal) can be connected to this input terminal.

3, 25

3.3-V supply voltage

XTAL1

30

I

Crystal 1. XTAL1 is a 6-MHz crystal input with 50% duty cycle. An internal PLL generates the 48-

MHz and 12-MHz clocks used internally by the ASIC logic.

XTAL2

29

O

Crystal 2. XTAL2 is a 6-MHz crystal output. This terminal must be left open when using an

oscillator.

(1)

Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings

only, and functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating

Conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

(2)

All voltage levels are with respect to GND.

7 Specifications

7.1 Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted)

(1)

MIN

MAX

UNIT

–0.5

3.6

V

Input voltage range

–0.5

V

Output voltage range

–0.5

V

Input clamp current

±20

mA

Output clamp current

±20

mA

Operating free-air temperature

TUSB2046B

0

70

°C

TUSB2046BI

–40

85

Storage temperature range

–65

150

°C

(1)

JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.

(2)

JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.

7.2 ESD Ratings

VALUE

UNIT

Electrostatic discharge

±4000

V

Charged-device model (CDM), per JEDEC specification JESD22-

±1500