Rainbow-electronics MAX13483E Manual de usuario descargar pdf (Pagina 11)

stand voltage measured to IEC 61000-4-2 generally is

lower than that measured using the Human Body

Model. Figure 8 shows the IEC 61000-4-2 model. The

Contact Discharge method connects the probe to the

device before the probe is charged.

Machine Model

The Machine Model for ESD tests all connections using

a 200pF storage capacitor and zero discharge resis-

tance. Its objective is to emulate the stress caused by

contact that occurs with handling and assembly during

manufacturing. All pins require this protection during

manufacturing, not just inputs and outputs. After PC

board assembly, the Machine Model is less relevant to

I/O ports.

MAX13481E/MAX13482E/MAX13483E

±15kV ESD-Protected USB Transceivers with

External/Internal Pullup Resistors

______________________________________________________________________________________ 11

OHD

OLD

90%

10%

90%

10%

, t

Figure 1. Rise and Fall Times

D-

D+

PLH_DRV

PHL_DRV

CRS_F

, V

CRS_L

VP AND VM RISE/FALL TIMES < 4ns

Figure 2. Timing of VP and VM to D+ and D-

D+/D-

PLZ_DRV

PZL_DRV

PHZ_DRV

PZH_DRV

VP/VM

CONNECTED TO GND,

D+/D- CONNECTED

TO PULLUP

VP/VM

CONNECTED TO V

D+/D- CONNECTED

TO PULLDOWN

D+/D-

Figure 3. Driver’s Enable and Disable Timing

Timing Diagrams

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 17 18 19

MAX13481E/MAX13482E/MAX13483E 1

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Rainbow-electronics MAX13483E Manual de usuario Pagina 11

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