YTD428 YAMAHA [YAMAHA CORPORATION], YTD428 Datasheet - Page 3

• Manufacturer Part Number: YTD428
• Description: DSU LSI for the ISDN Terminal Equipment
• Manufacturer: YAMAHA [YAMAHA CORPORATION]

BLOCK DIAGRAM
Internal Block Diagram
YTD428
T ref. pt. I/F section
T ref. pt.
T ref. pt.
receiver
driver
S/T ref. pt. LSI
switch section
YTD418 or
YTD423
Interface
TTL I/F
U ref. pt. I/F section
CT block
LT block
ADC
CT : Circuit Termination
LT : Line Termination
driver control
Amplifier
Peak hold
CT/LT section
U ref. pt.
Variable
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