YTD428-S Yamaha, YTD428-S Datasheet
YTD428-S
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YTD428-S Summary of contents
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... YTD428 APPLICATION MANUAL IDSU ISDN DSU for Terminal Equipment YTD428 APPLICATION MANUAL CATALOG No.: LSI-6TD428A3 2002.12 ...
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... IMPORTANT NOTICE 1. 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 and makes no commitment to update or to keep current the information contained in this document ...
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CONTENTS 1. INTRODUCTION ..................................................................................... 2 1.1 Features ................................................................................................................................ 3 2. BLOCK DIAGRAM .................................................................................. 4 2.1 Internal Block Diagram .......................................................................................................... 4 2.2 DSU Configuration Example ................................................................................................. 5 3. PIN DESCRIPTIONS .............................................................................. 7 3.1 Pin Assignments .................................................................................................................... 7 3.2 Pin Functions ........................................................................................................................ ...
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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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INTRODUCTION 1.1 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 ...
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... BLOCK DIAGRAM 2.1 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 BLOCK DIAGRAM Variable Amplifier Peak hold CT/LT section U ref. pt. driver control CT : Circuit Termination LT : Line Termination ...
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... BLOCK DIAGRAM 2.2 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 an I.430 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 I.430 TTL interface. This results in a reduction of pulse transformer parts ...
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... CLK4K 62 CLK256K 63 CLK200 64 CLK400 EXID 67 TEST9 68 TEST10 69 TEST11 70 TEST12 71 TEST13 72 TEST14 73 TEST15 TEST16 YTD428-S 100pin SQFP - LO2 LO1 21 20 CX1 LI2 18 17 CX2 LICT 16 LI1 ...
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Pin Functions Common Section ...
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... When TDP = “L”, set HTD, LTD = “H” Note 2 When using the YTD428 on a terminal with built-in DSU recommended that fixed timing be selected for the sample timing of T reference point receive data (TSMPSEL=“H” and TSMPAUT=“H”). This is because the bus distribution form becomes a short passive bus in this case ...
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T Reference Point Section ...
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PIN DESCRIPTIONS U Reference Point Section ...
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... Note 1 Outputs “L” when the YTD428 is set to not output the clock. In addition, if the YTD428 is not synchronized to the network, the frequency of the output clock is not guaranteed. Note 2 Clock is output when REV = “H.” Test Pins These are for LSI examinations, and not used in normal operation. ...
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... U reference point drive control T reference point receive timing control Loopback control YTD428 supports loopback 2 and loopback C for testing and maintenance. These loopback tests are under local switch control. Line Termination Block The line termination provides the f equalization which compensates the DLL (Digital Local Line) loss and the amplitude distortion, and the BT equalization which compensates the waveform distortion caused by the bridged tap ...
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... Because S/T bus signals that are connected to TA, TB, RA and RB pin are different between using YTD428 as DSU (NTSEL = "H") and S/T terminal (NTSEL = "L"). Generally speaking, the terminal resistors are only mounted on the nearest terminal from DSU and other terminals that are connected with the same bus don't require the terminal resistors ...
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DETAILS OF FUNCTIONS 4.4 T Reference Interface Section Reference Power Supply Block This block provides the electric power to supply for the receiver block and the driver block. Receiver Block The receiver block receives signal from the S/T bus through ...
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ELECTRICAL CHARACTERISTICS 5.1 Absolute Maximum Ratings ...
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ELECTRICAL CHARACTERISTICS 5.3 DC Characteristics ( .0V ...
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AC Characteristics T Reference Point Receive Characteristic (NT mode 5 - Load Capacity ...
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ELECTRICAL CHARACTERISTICS T Reference Point Receive Characteristic (TE mode 5 - ...
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I T Reference Point Transmit Characteristic (TE mode) ± Note 1 Note 2 ° Typ. N ...
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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 PIN DESCRIPTIONS ...
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... REFERENCE CIRCUIT REFERENCE CIRCUIT The reference circuit using YTD428 is shown as bellow. RA 100 RB TA 100 TB Varistor 6 FG I.430 TTL Interface YTD418 or YTD423 CLK1536 RESET Line activation circuit 1S953 12 YTD428 R(1%) LO1 1 R(1%) A1 LO2 UDM1 2SJ278 UDP1 LI1 8.2k LI2 8(1%) 8.2k UDP0 2SK2315 UDM0 A2 LICT 0.1 RX 33k ...
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Notice The specifications of this product are subject to improvement changes without prior notice. AGENCY All rights reserved 2002 Address inquiries to: Semiconductor Sales & Marketing Department Head Office 203, Matsunokijima, Toyooka-mura Iwata-gun, Shizuoka-ken, 438-0192, Japan Tel. +81-539-62-4918 Fax. +81-539-62-5054 ...