ST1394 datasheet(1/6 Pages) STMICROELECTRONICS

tên linh kiện	ST1394

Giải thích chi tiết về linh kiện	IEEE1394 ONE PORT CABLE TERMINATION NETWORK WITH ESD PROTECTION DIODES

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ST1394

IEEE1394 ONE PORT CABLE TERMINATION

NETWORK WITH ESD PROTECTION DIODES

REV. 2

TpBias

TPA-

TPB+

TPB-

GND

139

SOT23-6L

(Plastic)

October 2004

MAIN APPLICATIONS

IEEE1394 line termination on:

■ Desktops

■ Notebooks

■ Digital Camcorders

■ External storage drive

■ Set Top Box

FEATURES

■ Line termination for 2 twisted pairs TPA and

TPB

■ The device complies with IEEE1394 require-

ment for differential and common more imped-

ance on TPA and TPB line

■ Monolithic device with complete termination for

one IEEE1394 connection

DESCRIPTION

The ST1394-01SC6 is an integrated termination

network that optimizes board layout of the PHY

layer in IEEE1394 one port cable application.

This monolithic device is tested, according to ESD

requirement described in IEC61000-4-2 standard

level 2. ST1394-01SC6 device ruggedness limits

overvoltage at the 1394 tranceiver inputs and out-

puts below acceptable limits.

The

ST1394-01SC6

implements

IEEE1394

recommendation for line termination of TPA and

TPB differential lines. Excellent matching of the

termination resistor will minimize common mode

noise that is needed to improve communication

speed.

BENEFITS

■ Resistor matching between TPA / TPB lines.

■ Resistor matching between TPA+ / TPA-

■ Single chip devise versus 11 discretes

■ No need for additional overvoltage protection

device

■ High level of integration

IPAD™

TPA+

TpBias

GND

TPA-

TPB-

TPB+

R4

R1

C

R3

R2

R5

Lines

TPA+

TPA- TPB+ TPB-

Rpd

GND

Zener

Capacitance

Names

R1

R12

R3

R4

R5

C

Cz

Value

55

Ω

55

Ω

55

Ω

55

Ω

55

Ω 250pF

5pF

Tolerance

Typ.

20%

Max.

Matching

Matching between 55

Ω

Resistor at

±1% max

Figure 1: Pinout Configuration

Table 1: Order Code

Part Number

Marking

ST1394-01SC6

139

TM: IPAD is a trademark of STMicroelectronics.

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