YTD428_07 YAMAHA [YAMAHA CORPORATION], YTD428_07 Datasheet
YTD428_07
Related parts for YTD428_07
YTD428_07 Summary of contents
Page 1
YTD428 APPLICATION MANUAL IDSU ISDN DSU for Terminal Equipment YTD428 APPLICATION MANUAL CATALOG No.: LSI-6TD428A32 2005.1 ...
Page 2
...
Page 3
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 ........................................................................................................................ 8 ...
Page 4
INTRODUCTION YTD428 is a LSI which provides the ISDN subscriber interface (two-wire time compression multiplexing operation) and the NT side of the ISDN Basic Rate user-network interface function (digital four-wire time-division full-duplex operation capable of providing the ...
Page 5
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 ...
Page 6
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 ...
Page 7
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 ...
Page 8
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 ...
Page 9
PIN DESCRIPTIONS 3.1 Pin Assignments TEST4 51 TEST5 52 TEST6 53 TEST7 54 55 LOOP2A LPSW 56 57 TEST8 CLK1536 CLK4K 62 CLK256K 63 CLK200 64 CLK400 ...
Page 10
Pin Functions Common Section ...
Page 11
Mode Setting Section " " L " : " ...
Page 12
T Reference Point Section ...
Page 13
U Reference Point Section ...
Page 14
Clock Output Pins ...
Page 15
DETAILS OF FUNCTIONS 4.1 U Reference Point Section Variable Amplifier This block amplifies the receive signal amplitude to the maximum dynamic range. ADC This block makes an A/D conversion of the received signal and transfers it to the line ...
Page 16
Interface Switch Section Normally, this section connects T I/F section with CT/LT section to provide DSU function (NTSEL = “H”). By setting this section, the driver/receiver function of the T I/F section can be separated from the CT/LT section ...
Page 17
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 the external pulse ...
Page 18
ELECTRICAL CHARACTERISTICS 5.1 Absolute Maximum Ratings ...
Page 19
DC Characteristics ( .0V ...
Page 20
AC Characteristics T Reference Point Receive Characteristic (NT mode 5 - Load Capacity ...
Page 21
T Reference Point Receive Characteristic (TE mode 5 - ...
Page 22
I T Reference Point Transmit Characteristic (TE mode) ± Note 1 Note 2 ° Typ. N ...
Page 23
Figure 5.4 Transmit Block Test Circuit Driver, Receiver I/O Impedance ...
Page 24
PIN DESCRIPTIONS ...
Page 25
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 ...
Page 26
...
Page 27
...
Page 28
...