TUSB1044AI datasheet(48/66 Pages) TI1

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9.2.3 ESD Protection

It may be necessary to incorporate an ESD component to protect the TUSB1044A from electrostatic discharge

(ESD). TI recommends following the ESD protection recommendations listed in Table 9-2. A clamp voltage

greater than value specified in Table 9-2 may require a RESD on each differential pin. TI recommends to place

the ESD component near the USB connector.

Table 9-2. ESD Diodes Recommended Characteristics

Parameter

Recommendation

Breakdown voltage

≥ 3.5V

I/O line capacitance

Data rates ≤ 5Gbps: ≤ 0.50pF

Data rates > 5Gbps: ≤ 0.35pF

Delta capacitance between any P and N I/O pins

≤ 0.07pF

Clamping voltage at 8A IPP IO to GND (1)

≤ 4.5V

Typical dynamic resistance

≤ 30mΩ

(1)

According to IEC 61000-4-5 (8/20μs current waveform)

Table 9-3. Recommended ESD Protection Component

Manufacturer

Part Number

RESD to support IEC 61000-4-2 Contact ±8kV

Nexperia

PUSB3FR4

1Ω

Nexperia

PESD2V8Y1BSF

1Ω

Texas Instruments

TPD1E04U04DPLR

2Ω

Texas Instruments

TPD4E02B04DQAR

2Ω

9.2.4 Application Curve

Frequency (GHz)

-60

-55

-50

-45

-40

-35

-30

-25

-20

-15

-10

-5

D009

Length=12in, Width=6mil

Length=16in, Width=6mil

Length=20in, Width=6mil

Length=24in, Width=6mil

Length=4in, Width=4mil

Length=8in, Width=10mil

Length=8in, Width=6mil

Figure 9-3. Insertion Loss of FR4 PCB Traces

TUSB1044A

SLLSG07 – MARCH 2025

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