TUSB2077A_15 datasheet(7/26 Pages) TI1

Part #	TUSB2077A

Description	TUSB2077A 7-Port Hub for the Universal Serial Bus With Optional Serial EEPROM Interface

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Manufacturer	TI1 [Texas Instruments]

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TUSB2077A

www.ti.com

SLLS414F – MARCH 2000 – REVISED AUGUST 2015

7.5 Electrical Characteristics

over recommended ranges of operating free-air temperature and supply voltage (unless otherwise noted)

PARAMETER

TEST CONDITION

MIN

MAX

UNIT

TTL/LVCMOS

IOH = –4 mA

VCC – 0.5

VOH

High-level output voltage

R(DRV) = 15 kΩ to GND

2.8

V

USB data lines

IOH = –12 mA (without R(DRV))

VCC – 0.5

TTL/LVCMOS

IOL = 4 mA

0.5

VOL

Low-level output voltage

R(DRV) = 1.5 kΩ to 3.6 V

0.3

V

USB data lines

IOL = 12 mA (without R(DRV))

0.5

TTL/LVCMOS

1.8

VIT+

Positive input threshold

V

Single-ended

0.8 V

≤ VICR ≤ 2.5 V

1.8

TTL/LVCMOS

0.8

VIT–

Negative-input threshold

V

Single-ended

0.8 V

≤ VICR ≤ 2.5 V

1

TTL/LVCMOS

0.3

0.7

Input hysteresis(1)

Vhys

mV

(VT+ – VT–)

Single-ended

0.8 V

≤ VICR ≤ 2.5 V

300

500

TTL/LVCMOS

V = VCC or GND

(2)

±10

IOZ

High-impedance output current

μA

USB data lines

0 V

≤ VO ≤ VCC

±10

IIL

Low-level input current

TTL/LVCMOS

VI = GND

–1

μA

IIH

High-level input current

TTL/LVCMOS

VI = VCC

1

μA

z0(DRV)

Driver output impedance

USB data lines

Static VOH or VOL

7.1

19.9

Ω

VID

Differential input voltage

USB data lines

0.8 V

≤ VICR ≤ 2.5 V

0.2

V

Normal operation

40

mA

ICC

Input supply current

Suspend mode

1

μA

(1)

Applies for input buffers with hysteresis.

(2)

Applies for open-drain buffers.

7.6 Differential Driver Switching Characteristics (Full-Speed Mode)

over recommended ranges of operating free-air temperature and supply voltage, CL = 50 pF (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

MAX

UNIT

tr

Transition rise time for DP or DM

See Figure 1 and Figure 2

4

20

ns

tf

Transition fall time for DP or DM

See Figure 1 and Figure 2

4

20

ns

t(RFM)

Rise/fall time matching(1)

(tr/tf) × 100

90%

110%

VO(CRS) Signal crossover output voltage

(1)

1.3

2.0

V

(1)

Characterized only. Limits are approved by design and are not production tested.

7.7 Differential Driver Switching Characteristics (Low-Speed Mode)

over recommended ranges of operating free-air temperature and supply voltage, CL = 50 pF (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

MAX

UNIT

tr

Transition rise time for DP or DM(1)

CL = 200 pF to 600 pF, See Figure 1 and Figure 2

75

300

ns

tf

Transition fall time for DP or DM(1)

CL = 200 pF to 600 pF, See Figure 1 and Figure 2

75

300

ns

t(RFM)

Rise/fall time matching(1)

(tr/tf) × 100

80%

120%

VO(CRS) Signal crossover output voltage

(1)

CL = 200 pF to 600 pF

1.3

2.0

V

(1)

Characterized only. Limits are approved by design and are not production tested.

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