Overview
The DS125BR820NJYR, produced by Texas Instruments, is a low-power, high-performance repeater/redriver designed to support high-speed interfaces up to 12.5 Gbps. This component is particularly suited for applications such as 40G-CR4, 40G-KR4, SAS/SATA, and PCIe. It operates in three modes: Pin Control Mode, SMBus Slave Mode, and SMBus Master Mode, allowing for flexible configuration via pin control, software (SMBus or I2C), or direct loading from an external EEPROM. The device features seamless link training support, which facilitates system-level interoperability and minimizes latency.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Supply Voltage (2.5 V mode) | 2.375 | 2.5 | 2.625 | V |
| Supply Voltage (3.3 V mode) | 3.0 | 3.3 | 3.6 | V |
| Ambient Temperature | -40 | +85 | °C | |
| Current Consumption (2.5 V mode) | 220 | 280 | mA | |
| Current Consumption (3.3 V mode) | 220 | 280 | mA | |
| Power Down Current Consumption | 14 | 27 | mA | |
| High-Speed Data Rate | 12.5 Gbps | |||
| Package Type | WQFN (54) | |||
| Package Size | 10 mm × 5.5 mm |
Key Features
- Low power consumption: 70 mW per channel (typical), with the option to power down unused channels.
- Seamless link training support to facilitate system-level interoperability and minimize latency.
- Flow-thru layout in a 10 mm × 5.5 mm 54-pin leadless WQFN package.
- Programmable settings via pin control, software (SMBus or I2C), or direct loading from an external EEPROM.
- Support for various high-speed interfaces up to 12.5 Gbps, including 40G-CR4, 40G-KR4, SAS/SATA, and PCIe.
- Integrated LDO regulator and thermal management features.
Applications
- Front-port 40G-CR4/SR4/LR4 link extension.
- Backplane 40G-KR4 link extension.
- SAS/SATA/PCIe link extension.
- Other proprietary high-speed interfaces up to 12.5 Gbps.
Q & A
- What is the typical power consumption per channel of the DS125BR820?
The typical power consumption per channel is 70 mW.
- What are the operating modes of the DS125BR820?
The DS125BR820 operates in Pin Control Mode, SMBus Slave Mode, and SMBus Master Mode.
- How can the DS125BR820 be configured?
The DS125BR820 can be configured via pin control, software (SMBus or I2C), or direct loading from an external EEPROM.
- What is the maximum data rate supported by the DS125BR820?
The DS125BR820 supports high-speed interfaces up to 12.5 Gbps.
- What types of high-speed interfaces does the DS125BR820 support?
The DS125BR820 supports interfaces such as 40G-CR4, 40G-KR4, SAS/SATA, and PCIe.
- What is the package type and size of the DS125BR820?
The DS125BR820 comes in a 54-pin leadless WQFN package with dimensions of 10 mm × 5.5 mm.
- How does the DS125BR820 manage thermal issues?
The DS125BR820 includes thermal management features such as junction-to-ambient thermal resistance and junction-to-case thermal resistance.
- Can unused channels be powered down in the DS125BR820?
Yes, the DS125BR820 allows for the power down of unused channels to reduce power consumption.
- What is the significance of seamless link training support in the DS125BR820?
Seamless link training support facilitates system-level interoperability and minimizes latency by allowing the host controller and the endpoint to negotiate transmit equalizer coefficients transparently.
- What are some common applications of the DS125BR820?
Common applications include front-port 40G-CR4/SR4/LR4 link extension, backplane 40G-KR4 link extension, and SAS/SATA/PCIe link extension.
