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ST1394 Fiches technique(PDF) 1 Page - STMicroelectronics |
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ST1394 Fiches technique(HTML) 1 Page - STMicroelectronics |
1 / 6 page ® 1/6 ST1394 IEEE1394 ONE PORT CABLE TERMINATION NETWORK WITH ESD PROTECTION DIODES REV. 2 TpBias TPA- 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. Typ. Typ. Typ. 20% 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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