TUSB2077A

7-PORT HUB FOR THE UNIVERSAL SERIAL BUS

WITH OPTIONAL SERIAL EEPROM INTERFACE

SLLS414 – MARCH 2000

5

POST OFFICE BOX 655303

Terminal Functions (Continued)

TERMINAL

I/O

DESCRIPTION

NAME

NO.

I/O

DESCRIPTION

SUSPND

1

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.

VCC

9, 46

3.3-V supply voltage.

XTAL1/CLK48

45

I

Crystal 1/48-MHz Clock Input. When MODE is low, XTAL1/CLK48 is a 6-MHz crystal input with 50%

duty cycle. An internal APLL generates the 48-MHz and 12-MHz clocks used internally by the ASIC

logic. When MODE is high, XTAL1/CLK48 acts as the input of the 48 MHz clock and the internal APLL

logic is bypassed.

XTAL2

44

O

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

† All LED control are 3-stated during low-power suspend.

– 0.5 V to 3.6 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

±20 mA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

±20 mA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–65

°C to 150°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

0

°C to 70°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

† 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.

NOTE 1: All voltage levels are with respect to GND.

recommended operating conditions

MIN

NOM

MAX

UNIT

Supply voltage, VCC

3

3.3

3.6

V

Input voltage, TTL/LVCMOS‡, VI

0

VCC

V

Output voltage, TTL/LVCMOS§, VO

0

VCC

V

High-level input voltage, signal-ended receiver, VIH(REC)

2

VCC

V

Low-level input voltage, signal-ended receiver, VIL(REC)

0.8

V

High-level input voltage, TTL/LVCMOS‡, VIH(TTL)

2

VCC

V

Low-level input voltage, TTL/LVCMOS‡, VIL(TTL)

0

0.8

V

Operating free-air temperature, TA

0

70

°C

External series, differential driver resistor, R(DRV)

22

Ω

Operating (DC differential driver) high speed mode, f(OPRH)

12

Mb/s

Operating (DC differential driver) low speed mode, f(OPRL)

1.5

Mb/s

Common mode, input range, differential receiver, V(ICR)

0.8

2.5

V

Input transition times (tr and tf), TTL/LVCMOS‡

0

25

ns

Junction temperature range, TJ¶

0

115

°C

‡ Applies for input and bidirectional buffers

§ Applies for output and bidirectional buffers

¶ These junction temperatures reflect simulated conditions. Absolute maximum junction temperature is 150

°C. The customer is responsible for

verifying junction temperature.