Overview
The DS25BR440TSQ/NOPB is a 3.125 Gbps Quad Low-Voltage Differential Signaling (LVDS) buffer produced by Texas Instruments. This component 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 device supports both AC and DC coupling and is compatible with various differential drivers such as LVDS, LVPECL, and CML.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Data Rate | DC | - | 3.125 Gbps | - |
| Supply Voltage | -0.3 | - | 4.0 | V |
| High Level Input Voltage (VIH) | - | - | 2.0 VDD | V |
| Low Level Input Voltage (VIL) | 0.8 VDD | - | - | V |
| Channel to Channel Skew (tSKD2) | 18 | 65 | - | ps |
| Part to Part Skew (tSKD3) | 50 | 170 | - | ps |
| Rise Time (tLHT) | 80 | 160 | - | ps |
| Fall Time (tHLT) | 80 | 160 | - | ps |
| Random Jitter (tRJ1) at 3.125 Gbps | 0.5 | 1 | - | ps |
| Deterministic Jitter (tDJ1) at 3.125 Gbps | 6 | 22 | - | ps |
Key Features
- Pin-selectable transmit pre-emphasis and receive equalization to enhance signal integrity over long distances.
- Supports data rates up to 3.125 Gbps.
- Wide input common mode voltage range, allowing DC-coupled interface to LVDS, LVPECL, and CML drivers.
- Loss of Signal (LOS) output pins to detect open input fault conditions.
- Power-down mode to reduce power consumption when the device is not in use.
- Fully differential signal paths for improved noise immunity.
- Compliant with LVDS standard for output signals.
Applications
- High-speed data transmission systems.
- Telecommunication equipment.
- Data centers and server farms.
- High-performance computing systems.
- Backplane and cable interconnects.
- FPGA and ASIC interfaces.
Q & A
- What is the maximum data rate supported by the DS25BR440TSQ/NOPB?
The DS25BR440TSQ/NOPB supports data rates up to 3.125 Gbps.
- What is the purpose of the transmit pre-emphasis and receive equalization features?
These features help to enhance signal integrity by compensating for signal degradation over long distances and through lossy media.
- Can the DS25BR440TSQ/NOPB be DC-coupled with other differential drivers?
- What is the function of the Loss of Signal (LOS) output pins?
The LOS output pins detect open input fault conditions and report them as open drain outputs.
- How does the power-down mode work on the DS25BR440TSQ/NOPB?
The power-down mode reduces power consumption when the device is not in use by setting the PWDN pin to low.
- What is the typical rise and fall time of the DS25BR440TSQ/NOPB?
The typical rise and fall times are 80 to 160 ps.
- What is the channel to channel skew of the DS25BR440TSQ/NOPB?
The channel to channel skew is typically 65 ps.
- Is the DS25BR440TSQ/NOPB RoHS compliant?
- What is the operating temperature range of the DS25BR440TSQ/NOPB?
The operating temperature range is from -40°C to 85°C.
- What type of package is the DS25BR440TSQ/NOPB available in?
The device is available in a WQFN (Wafer Quad Flat No-Lead) package.
