Overview
The DS125BR820NJYT, produced by Texas Instruments, is a low-power, high-performance 8-channel linear 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 preserves transmit signal characteristics, facilitating seamless link training and system-level interoperability.
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-pin) | |||
| Package Size | 10 mm × 5.5 mm |
Key Features
- Low power consumption: 70 mW/channel (typical) with the option to power down unused channels.
- Seamless link training support, preserving transmit signal characteristics for system-level interoperability.
- 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 maximum data rate supported by the DS125BR820?
The DS125BR820 supports high-speed interfaces up to 12.5 Gbps.
- What are the operating voltage modes for the DS125BR820?
The device operates in 2.5 V and 3.3 V modes.
- How can the DS125BR820 be configured?
The device can be configured via pin control, software (SMBus or I2C), or direct loading from an external EEPROM.
- What is the typical power consumption per channel?
The typical power consumption per channel is 70 mW.
- What is the package type and size of the DS125BR820?
The device is packaged in a 10 mm × 5.5 mm 54-pin leadless WQFN package.
- Does the DS125BR820 support link training?
Yes, it supports seamless link training, preserving transmit signal characteristics.
- What are some common applications for the DS125BR820?
Common applications include front-port 40G-CR4/SR4/LR4 link extension, backplane 40G-KR4 link extension, and SAS/SATA/PCIe link extension.
- How does the DS125BR820 manage thermal issues?
The device includes thermal management features such as junction-to-ambient thermal resistance and junction-to-case thermal resistance.
- Can unused channels be powered down to save power?
Yes, the DS125BR820 allows for powering down unused channels to reduce power consumption.
- What is the significance of the SMBus modes in the DS125BR820?
The SMBus modes (Slave and Master) allow for flexible configuration and control of the device.
