Overview
The DS25BR440TSQX/NOPB is a 3.125 Gbps Quad LVDS (Low Voltage Differential Signaling) buffer produced by Texas Instruments. This device is optimized for high-speed signal routing and repeating over lossy FR-4 printed circuit board backplanes and balanced cables. It features fully differential signal paths, ensuring exceptional signal integrity and noise immunity. The DS25BR440 is designed to support DC-coupled interfaces to various differential drivers such as LVDS, CML, and LVPECL, making it versatile for a range of high-speed applications.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Data Rate | DC | - | 3.125 Gbps | Gbps |
| Supply Voltage | -0.3V | - | +4V | V |
| LVCMOS Input Voltage | -0.3V | - | VCC + 0.3V | V |
| LVDS Input Voltage | -0.3V | - | +4V | V |
| Differential Input Voltage | - | - | 1V | V |
| Junction Temperature | - | - | +150°C | °C |
| Storage Temperature Range | -65°C | - | +150°C | °C |
| Lead Temperature Range (Soldering) | - | - | +260°C | °C |
| Channel to Channel Skew | 18 ps | 65 ps | - | ps |
| Part to Part Skew | 50 ps | 170 ps | - | ps |
Key Features
- Pin Selectable Transmit Pre-Emphasis and Receive Equalization to optimize signal integrity over various media.
- Supports DC-coupled interfaces to LVDS, CML, and LVPECL differential drivers.
- Wide Input Common Mode Voltage Range allowing for flexibility in input signal levels.
- Loss Of Signal (LOS) output pins to detect open input fault conditions.
- Power Down Mode (PWDN) to reduce power consumption when the device is not in use.
- Low Jitter and Low Skew performance to ensure high-quality signal transmission.
- ESD protection, though limited, with recommendations for handling to prevent damage.
Applications
The DS25BR440TSQX/NOPB is suitable for various high-speed applications, including:
- High-speed data transmission systems.
- Backplane and cable interconnects.
- FPGA and ASIC interfaces.
- Telecommunication and networking equipment.
- Data centers and high-performance computing systems.
Q & A
- What is the maximum data rate supported by the DS25BR440TSQX/NOPB?
The DS25BR440TSQX/NOPB supports a maximum data rate of 3.125 Gbps.
- What types of differential drivers can the DS25BR440TSQX/NOPB be DC-coupled with?
The device can be DC-coupled with LVDS, CML, and LVPECL differential drivers.
- What is the purpose of the transmit pre-emphasis and receive equalization features?
These features are used to optimize signal integrity over various transmission media by compensating for signal degradation.
- How does the Loss Of Signal (LOS) feature work?
The LOS output pins report when an open input fault condition is detected at the input, helping in fault detection and system reliability.
- What is the power down mode (PWDN) used for?
The PWDN pin allows the device to enter a power down mode, reducing power consumption when the device is not in use.
- What are the recommended handling practices to prevent ESD damage?
The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage.
- What is the operating temperature range for the DS25BR440TSQX/NOPB?
The device operates within a temperature range of -40°C to +85°C.
- What is the package type and pin count of the DS25BR440TSQX/NOPB?
The device is packaged in a WQFN (Wafer Quad Flat No-Lead) package with 40 pins.
- Is the DS25BR440TSQX/NOPB RoHS compliant?
Yes, the device is RoHS compliant, suitable for use in specified lead-free processes.
- What are some typical applications for the DS25BR440TSQX/NOPB?
It is used in high-speed data transmission systems, backplane and cable interconnects, FPGA and ASIC interfaces, and more.
