Rainbow-electronics MAX13483E Manual do Utilizador descarregar pdf (Página 12)

MAX13481E/MAX13482E/MAX13483E

±15kV ESD-Protected USB Transceivers with

External/Internal Pullup Resistors

12 ______________________________________________________________________________________

Timing Diagrams (continued)

+3V

RCV, VM, AND VP

D+/D-

PLH_RCV

PLH_SE

PHL_RCV

PHL_SE

INPUT RISE/FALL TIME < 4ns

Figure 4. D+/D- Timing to VP, VM, and RCV

CHARGE-CURRENT-

LIMIT RESISTOR

DISCHARGE

RESISTANCE

STORAGE

CAPACITOR

100pF

1MΩ

1.5kΩ

HIGH-

VOLTAGE

SOURCE

DEVICE

UNDER

TEST

Figure 6. Human Body ESD Test Model

100%

90%

36.8%

TIME

CURRENT WAVEFORM

PEAK-TO-PEAK RINGING

(NOT DRAWN TO SCALE)

10%

AMPERES

Figure 7. Human Body Model Current Waveform

VP/VM

PLZ_SE

PZL_SE

PHZ_SE

PZH_SE

D+/D-

CONNECTED TO GND,

VP/VM CONNECTED

TO PULLUP

D+/D-

CONNECTED TO +3V,

VP/VM CONNECTED

TO PULLDOWN

Figure 5. Receiver’s Enable and Disable Timing

CHARGE-CURRENT-

LIMIT RESISTOR

DISCHARGE

RESISTANCE

STORAGE

CAPACITOR

150pF

50Ω to 100Ω

330Ω

HIGH-

VOLTAGE

SOURCE

DEVICE

UNDER

TEST

Figure 8. IEC 61000-4-2 ESD Test Model

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

MAX13481E/MAX13482E/MAX13483E 1

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