YTD439中文资料PDF规格书
YTD439规格书详情
[Yamaha]
❑ Abstract
YTD439 is a LSI that integrates in a single chip all the communication functions that are necessary for constructing an ISDN terminal with a built-in DSU. The functions of both the DSU (U reference point) and terminal (S/T reference point) are packed into the 100-pin SQFP chip allowing miniaturization of the terminal equipment.
YTD439 has a built-in TD switch function that is necessary for controlling the connection of the B-channel data. By connecting an external CPU, memory, and CODEC, a terminal with a built-in DSU can be configured. In addition, YTD439 has a function that reduces the power consumption by stopping the functions of unused blocks. This is effective for battery-driven terminals.
❍ Features
DSU block
• Conforms to TTC Standards JT-I430 and JT-G961.
• LT (line termination) function and CT (circuit termination) function.
• DSU can be disconnected.
S/T reference point driver/receiver block
• Transition to the sleep state possible by setting an I/O register.
CPU interface block
• 8-bit or 16-bit data bus selectable.
• I/O access through registers.
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
产品属性
- 型号:
YTD439
- 功能描述:
ISDN BRI controller for Terminal Equipment with built-in DSU
供应商 | 型号 | 品牌 | 批号 | 封装 | 库存 | 备注 | 价格 |
---|---|---|---|---|---|---|---|
YAMAHA |
2016+ |
TQFP100 |
9000 |
只做原装,假一罚十,公司可开17%增值税发票! |
询价 | ||
YAMAHA |
2016+ |
TQFP100 |
6523 |
只做进口原装现货!假一赔十! |
询价 | ||
YAMAHA |
TQFP100 |
53650 |
一级代理 原装正品假一罚十价格优势长期供货 |
询价 | |||
YAMAHA |
23+ |
NA/ |
3270 |
原厂直销,现货供应,账期支持! |
询价 | ||
YAMAHA |
2138+ |
TQFP |
8960 |
专营BGA,QFP原装现货,假一赔十 |
询价 | ||
YAMAHA |
22+ |
QFP |
2307 |
原装现货热卖中,提供一站式真芯服务 |
询价 | ||
YAMAHA |
TQFP100 |
396379 |
集团化配单-有更多数量-免费送样-原包装正品现货-正 |
询价 | |||
YAMAHA |
2021+ |
TQFP100 |
7841 |
百分百原装正品 |
询价 | ||
YAMAHA |
23+ |
TQFP |
4500 |
全新原装、诚信经营、公司现货销售 |
询价 | ||
YAMAHA |
22+ |
TQFP100 |
3000 |
一级代理原厂VIP渠道,专注军工、汽车、医疗、工业、 |
询价 |