MAX3346E Просмотр технического описания (PDF) - Maxim Integrated

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MAX3346E

±15kV ESD-Protected USB Transceiver in UCSP

Maxim Integrated 

±15kV ESD-Protected USB Transceiver

in UCSP

IEC 1000-4-2

The IEC 1000-4-2 standard covers ESD testing and

performance of finished equipment; it does not specifi-

cally refer to integrated circuits. The MAX3346E helps

to design equipment that meets Level 2 of IEC 1000-4-

2, without the need for additional ESD-protection com-

ponents.

The major difference between tests done using the

Human Body Model and IEC 1000-4-2 is a higher peak

current in IEC 1000-4-2, because series resistance is

lower in the IEC 1000-4-2 model. Hence, the ESD with-

stand voltage measured to IEC 1000-4-2 is generally

lower than that measured using the Human Body Model.

Figure 7a shows the IEC 1000-4-2 model.

The Air-Gap Discharge test involves approaching the

device with a charged probe. The Contact Discharge

method connects the probe to the device before the

probe is energized.

Machine Model

The Machine Model for ESD tests all pins using a 200pF

storage capacitor and zero discharge resistance. Its

objective is to emulate the stress caused by contact that

occurs with handling and assembly during manufactur-

ing. Of course, all pins require this protection during

manufacturing, not just USB inputs and outputs.

Therefore, after PC board assembly, the Machine Model

is less relevant to I/O ports.

RC

50MΩ to 100MΩ

RD

330Ω

CHARGE-CURRENT

LIMIT RESISTOR

DISCHARGE

RESISTANCE

HIGH-

VOLTAGE

DC

SOURCE

Cs

150pF

STORAGE

CAPACITOR

DEVICE

UNDER

TEST

Figure 7a. IEC 1000-4-2 ESD Test Model

UCSP Applications Information

For the latest application details on UCSP construction,

dimensions, tape carrier information, printed circuit board

techniques, bump-pad layout, and recommended reflow

temperature profile as well as the latest information on

reliability testing results, go to the Maxim website at

www.maxim-ic.com/ucsp for the Application Note,

“UCSP—A Wafer-Level Chip-Scale Package.”

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