YTD439 查看數據表（PDF） - Unspecified

零件编号

产品描述 (功能)

生产厂家

YTD439

ISDN BRI controller for Terminal Equipment with built-in DSU

Unspecified 

Layer 1 control block

• Frame assembling and disassembling function.

• I430 TTL output pin

Layer 2 control block

• Built-in LAPD protocol (supports four links).

• Call control and D-channel packet function.

Layer 3 interface block

• Message exchange through I/O access (large 1088-byte FIFO).

B channel HDLC controller

• Supports CRC-CCITT and CRC-32.

• 128k/64k/56k rate adaption

B channel transparent

• Supports PIAFS 64k/32k.

• Flexible rate adaption function.

B channel DATA FIFO

• Transmission and reception: 128-byte FIFO × 2 channels.

TD switch

• Switch circuit for 8 channels of B channel data.

• 512 k to 2,048 kHz PCM highway.

Others

• Terminal block can be disconnected. Power can be cut off.

• Terminal block sleep mode.

• Power supply to the analog block: +5 V.

Power supply to the digital block: +5 V or 3.3 V.

• 5 V tolerant I/O pin

• 100-pin SQFP.

❍ Applications

• Terminal adapter

• Remote router

• ISDN telephone

• ISDN home telephone

• ISDN Facsimile

-2-

Share Link: