The DIR9001 can decode the biphase signal format which is specified in one of the following standards. Generally, these following standards may be called Sony\/Philips digital interface format (S\/PDIF) or AES\/EBU. \u2022 IEC60958 (revised edition of former IEC958) \u2022 JEITA CPR-1205 (revised edition of former EIAJ CP-1201, CP-340) \u2022 AES3 \u2022 EBU tech3250 The sampling frequency range and data word length which DIR9001 can decode is as follows: \u2022 Sampling frequency range is 28 kHz to 108 kHz. \u2022 Maximum audio sample word length is 24-bit. Note of others about the biphase input signal. \u2022 The capture ratio of the built-in PLL complies with level III of sampling frequency accuracy (\u00b112.5%), which is specified in IEC60958-3. \u2022 The jitter tolerance of the DIR9001 complies with IEC60958-3. \u2022 The PLL may also lock in outside of the specified sampling-frequency range, but extended range is not assured. Notice about the signal level and transmission line of the biphase input signal. \u2022 The signal level and the transmission line (optical, differential, single-ended) are different in each standard. \u2022 The biphase input signal is connected to the RXIN pin of the DIR9001. \u2022 The RXIN pin has a 5-V tolerant TTL-level input. \u2022 An optical receiver module (optical to electric converter) such as TOSLINK, which is generally used in consumer applications, is connected directly to the RXIN pin without added external components. \u2022 The output waveform of the optical receiver module varies depending on the characteristics of each product type, so a dumping resistor or buffer amplifier might be required between the optical receiver module output and the DIR9001 input. Careful handling is required if the optical receiver module and the DIR9001 are separated by a long distance. \u2022 The DIR9001 needs an external amplifier if it is connected to a coaxial transmission line. \u2022 The DIR9001 needs an external differential to single-ended converter, attenuator, etc., for general consumer applications if non-optical transmission line is used.<\/p>\n
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