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YTD439-S
YTD439-S - Brand New YAMAHA IC Chips
Credit Card - One-month free return and one year warranty.
- Full or Partial Refund, if the item is not as described
- Full Refund if you don't receive your order
Product Details
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[ 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
Shipping
| First item | Additional item | Service | Description |
|---|---|---|---|
| $0.00 | Free | Free Shipping | Estimated 15-30 business days via Registered Air Mail or others |
| $27.50 | Free | Expedited Shipping | Estimated delivery time is 3-5 business days, with some areas possibly taking 6-9 business days depending on the shipping address. The main courier companies include but are not limited to UPS, DHL, and FedEx. |
| $0.00 | Free | Buyer cooperating carrier | Using buyer's cooperating carrier. Buyer should create a shipping label and share it to us. And then we will call carrier for pickup |
| $38.00 | Free | Expedited Shipping | Estimated delivery time is 3-5 business days, with some areas possibly taking 6-9 business days depending on the shipping address. The main courier companies include but are not limited to UPS, DHL, and FedEx. |
Delivery
- The transportation time may be delayed due to customs clearance, local holidays or abnormal events.
- The estimated time is based on the fastest speed provided by commercial couriers (DHL, FedEx, UPS etc).
- The estimated time does not include the lead time of the item. The lead time of most items is 2–5 business days. If more than 5 working days are needed, we will manually confirm with you.
| Flag | Country | Express Delivery | Standard Delivery |
|---|---|---|---|
 | United States | 3 - 5 days | 10-15 days |
 | Canada | 3 - 5 days | 10-20 days |
 | Mexico | 3 - 5 days | 10-17 days |
 | Germany | 3 - 5 days | 10-12 days |
 | Italy | 3 - 5 days | 10-15 days |
 | United Kingdom | 3 - 5 days | 10-12 days |
Estimated Delivery
This item requires 2-5 business days for processing before shipping after payment is confirmed. And depending on the destination and shipping method.
Return Policy
| Return window | Refund type | Return shipping |
|---|---|---|
| 60 days after receiving item | Money Back or Replacement | Buyer pays for return shipping |
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