ST1394 查看數據表（PDF） - STMicroelectronics

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ST1394

IEEE1394 ONE PORT CABLE TERMINATION NETWORK WITH ESD PROTECTION DIODES

STMicroelectronics 

ST1394

Table 2: Absolute Ratings (Tamb = 25°C)

Symbol

Parameter and test conditions

Tstg Storage temperature range

Tj

Maximum junction temperature

TL Lead solder temperature (10 second duration)

Value

Unit

- 55 to + 150 °C

+ 150

°C

260

°C

Table 3: Electrical Characteristics (Tamb = 25°C)

Symbol

Parameter

R1, R2, R3, R4 Bus termination resistors (note 1)

CZ

Zener capacitance

Rpd

Pull down resistor

C

(R1+R2),

(R3+R4)

Capacitor in parallel with Rpd

Bus termination impedance

Note 1: matching between 55Ω resistors is better than ± 1%.

Figure 2: Functionnal Diagram

Min.

Typ.

Max.

Unit

55

Ω

5

pF

5

kΩ

250

pF

102

110

118

Ω

TpBias

TPA+

TPA-

TPB+

TPB-

55Ω

55Ω

250pF

55Ω

5kΩ

55Ω

Minimize this distance

1µF

Twisted

Pair A

1MΩ

0.01µF

Twisted

Pair B

Outer

shied

0.1µF termination

APPLICATION INFORMATION

The functional diagram here above presents a IEEE1394-a cable and shows how to connect the

ST1394-01SC6 in order to correctly terminate and filter the TPA and TPB lines.

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