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USB extension cable chip CH315G
USB signal isolation chip CH315H |
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| 1. Introduction |
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CH315G is USB extension cable chip, used for USB signal real time transmit and extend transfer
distance.
CH315H is USB signals isolation control chip, used for USB bus optical isolator or magnetic isolator.
CH315 supports full-speed and low-speed transfer, support USB device dynamic insert and remove.
The following is application image. |
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● supports 12Mbps full-speed and 1.5Mbps low-speed USB transfer, compatible with USB 2.0.
● supports USB control transfer, bulk transfer, interrupt transfer, synchronous/isochronous transfer.
● automatically detect USB Full-Speed or USB Low-Speed, CH315H offer USB transfer status indication.
● the same chip can be configured as upstream mode and downstream mode, connect to USB-Host and USB-Device.
● the downstream mode can automatically detect USB device connection and removal, the upstream mode can automatically simulate USB device connection and removal.
● set impedance matching serial resistor of USB signal, pull-up resistor of USB device port, pull-down resistor of USB host port.
● set PLL and 12MHz USB clock internal, no need crystal or crystal resonator, the peripheral circuit is simply.
● set USB signal extension circuit in the CH315G, support category 5 or category 5 unshielded twisted-pair super, the transfer distance is no less than 75m of 12Mbps full-speed USB signal, the transfer distance is no less than 300m of 1.5Mbps.
● set current driven circuit of photic coupler in CH315H, support the low-cost 6N137, the photic coupler can not influenced by electromagnetism.
● only hardware project, real time of USB protocol, no need other drive program, support Windows
98/ME/2000/XP/Vista/Server200X/64bit-Vista and Linux.
● set 3.3V power manostat in the internal. Support 5V power (default) and 3.3V power.
● CH315G adopt SOP-14 lead-free package, CH315H adopt SOP-18 lead-free package, compatible with RoHS. |
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| 3. Package |
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| 4. Pins |
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CH374DS1.PDF
The DataSheet about CH374
USB-HOST&
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CH375DS1.PDF
The DataSheet of CH375
handy and wi
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