MB4U datasheet(5/16 Pages) ICHAUS

5 / 16 page

preliminary

MB4U

BiSS, SSI, PC-USB 2.0 ADAPTER

Rev C1, Page 5/16

ELECTRICAL CHARACTERISTICS

Item

Symbol

Parameter

Conditions

Unit

No.

Min.

Typ.

Max.

Power Supply Input

001 Vusb

Supply Voltage

By USB port

4.5

5.0

5.5

002 Iusb

Current Consumption

From USB port

500

Power Supply Output (VDD, VB)

101 VDD

VDD Supply Output

USB powered

4.5

5.0

5.5

102 I(VDD)

Permissible VDD Load Current

USB powered; load at VDD;

250

no other load at VB, MA±, MO±

103 VB

VB Supply Output

USB powered

104 I(VB)

Permissible VB Load Current

USB powered; load at VB;

no other load at VDD, MA±, MO±

RS-422 Outputs MA/NMA/MO/NMO

301 Vout()

Diff. Output at MA+, MA-, MO+,

MO-

RL = 54Ω;

1.5

according to MAX3491EESD+ or ADM3491

datasheet

302 fclock()

Clock Frequency at MA+, MA-

50% duty cycle

MHz

303 fdata()

Data Frequency at MO+, MO-

50% duty cycle

MHz

RS-422 Inputs SL/NSL

401 f(max)

Maximum Communication Fre-

quency

50% duty cycle

MHz

402 VIT+()

Positive going input threshold

voltage at SL+ vs. SL-

according to MAX3491EESD+ or ADM3491

datasheet

0.8

403 VIT-()

Positive going input threshold

voltage at SL+ vs. SL-

according to MAX3491EESD+ or ADM3491

datasheet

2.0

404 VHYST

Hysteresis voltage

according to MAX3491EESD+ or ADM3491

datasheet

405 Rin()

Input Termination at SL+ vs. SL-

120

Ω

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