YTD428 YAMAHA [YAMAHA CORPORATION], YTD428 Datasheet
YTD428
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YTD428 Summary of contents
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... It is capable of providing the electric characteristics conforming to TTC Standard JT-I430 and JT-G961. YTD428 incorporates the circuit termination and line termination functions on a single chip allowing the user to easily configure a DSU (Digital Service Unit) that consumes small amount of power at a minimal cost ...
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Features Circuit Termination Section Conforms to TTC Standard JT-I430 and JT-G961 Digital four-wire time-division full-duplex operation Two-wire time compression multiplexing operation Transmission rate at U reference point: 320 kbit/ reference point: 192 kbit/s Frame assembling and disassembling function ...
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... BLOCK DIAGRAM Internal Block Diagram YTD428 T ref. pt. I/F section T ref. pt. driver T ref. pt. receiver U ref. pt. I/F section ADC CT block Interface switch section LT block TTL I/F S/T ref. pt. LSI YTD418 or YTD423 Variable Amplifier Peak hold CT/LT section U ref. pt. driver control CT : Circuit Termination LT : Line Termination - 3 - ...
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... DSU Configuration Example YTD428 incorporates the circuit termination, line termination, T reference point interface and U reference point interface functions on a single chip allowing the user to easily configure a DSU that consumes small amount of power at a minimal cost. The user can select from the two types of configurations ...
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... Configuration example of a device with a built-in DSU that uses a TTL interface at the T ref. pt. When using YTD428 with YAMAHA'S S/T reference point interface LSI to create a device with a built-in DSU, they can be connected directly through the TTL interface. This results in a reduction of pulse transformer parts. ...
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... CLK4K 61 CLK256K 62 CLK200 63 64 CLK400 EXID 67 TEST9 68 TEST10 69 TEST11 70 TEST12 71 TEST13 72 TEST14 73 TEST15 TEST16 - 6 - YTD428-S 100pin SQFP LO2 LO1 20 CX1 LI2 18 CX2 17 LICT 16 LI1 ...
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ELECTRICAL CHARACTERISTICS Absolute Maximum Ratings ...
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DC Characteristics ( .0V ...
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AC Characteristics T Reference Point Receive Characteristic (NT mode 5 - Load Capacity ...
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T Reference Point Receive Characteristic (TE mode 5 - ...
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T Reference Point Transmit Characteristic (TE mode 5 - ...
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... Note 1 When no pulse is output. Note 2 When pulse is output 100 HTD LO1 R O YTD428 R L 200 LTD LO2 ...
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PIN DESCRIPTIONS - 13 - ...
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Yamaha reserves the right to make changes to its Products and to this document without notice. The information contained in this document has been carefully checked and is believed to be reliable. However, Yamaha assumes no responsibilities for inaccuracies ...