Document
Data Sheet, Rev. 3 June 2001
FW804 PHY IEEE * 1394A Four-Cable Transceiver/Arbiter Device
Distinguishing Features
I Compliant with IEEE P1394a Draft 2.0 Standard for a High Performance Serial Bus (Supplement)
I Supports extended BIAS_HANDSHAKE time for enhanced interoperability with camcorders.
I While unpowered and connected to the bus, will not drive TPBIAS on a connected port even if receiving incoming bias voltage on that port.
I Does not require external filter capacitors for PLL.
I Does not require a separate 5 V supply for 5 V link controller interoperability.
I Interoperable across 1394 cable with 1394 physical layers (PHY) using 5 V supplies.
I Interoperable with 1394 link-layer controllers using 5 V supplies.
I Powerdown features to conserve energy in batterypowered applications include: — Device powerdown pin. — Link interface disable using LPS. — Inactive ports power down.
I Interface to link-layer controller supports Annex J electrical isolation as well as bus-keep.