Overview
The DS25CP104ATSQX/NOPB, produced by Texas Instruments, is a 3.125 Gbps 4x4 Low-Voltage Differential Signaling (LVDS) crosspoint switch. This component is optimized for high-speed signal routing and switching over lossy FR-4 printed circuit board backplanes and balanced cables. It features transmit pre-emphasis and receive equalization, which are crucial for maintaining signal integrity over long distances and through lossy media.
The device operates in two modes: Pin Mode and SMBus Mode, allowing for flexible configuration of the switch settings. The DS25CP104ATSQX/NOPB is particularly useful in applications requiring high-speed data transmission and switching, such as in video and data communication systems.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Supply Voltage (VCC) | 3.0 | 3.3 | 3.6 | V |
| Operating Free Air Temperature (TA) | -40 | - | 85 | °C |
| LVDS Differential Input Voltage (VID) | 0 | - | 1 | V |
| Differential Propagation Delay Low to High | 480 | 650 | ps | |
| Pulse Skew |tPLHD − tPHLD| | 20 | 100 | ps | |
| Supply Current (ICC1) PWDN = 0 | 40 | 50 | mA | |
| Input Termination Resistor (RIN) | 100 | - | - | Ω |
Key Features
- High-Speed Operation: Supports data rates up to 3.125 Gbps.
- Transmit Pre-Emphasis and Receive Equalization: Four levels of transmit pre-emphasis and receive equalization to mitigate signal degradation.
- Pin and SMBus Configurable: Fully configurable via external pins or the System Management Bus (SMBus) interface.
- Non-Blocking Architecture: Allows connections of any input to any output or outputs.
- Differential Signal Paths: Ensures exceptional signal integrity and noise immunity.
- Loss of Signal (LOS) Circuitry: Detects open input conditions and informs the system via the SMBus interface.
- On-Chip Termination: Integrated 100Ω input termination for each high-speed LVDS pair (DS25CP104A), or requires external termination (DS25CP114).
- ESD Protection: 8 kV ESD protection on LVDS I/O pins.
Applications
- Video and Data Communication Systems: Ideal for high-speed video transmission, such as in SD/HD/3G-SDI systems.
- Backplane and Cable Interconnects: Suitable for signal routing over lossy FR-4 printed circuit board backplanes and balanced cables.
- High-Speed Data Centers: Used in data centers for high-speed data switching and routing.
- Aerospace and Defense: Applicable in high-reliability, high-speed communication systems.
Q & A
- What is the maximum data rate supported by the DS25CP104ATSQX/NOPB?
The DS25CP104ATSQX/NOPB supports data rates up to 3.125 Gbps.
- How can the switch configuration be set for the DS25CP104ATSQX/NOPB?
The switch configuration can be set via external pins (Pin Mode) or the System Management Bus (SMBus) interface (SMBus Mode).
- What is the purpose of transmit pre-emphasis and receive equalization in the DS25CP104ATSQX/NOPB?
These features help mitigate signal degradation over long distances and through lossy media, ensuring signal integrity.
- Does the DS25CP104ATSQX/NOPB have built-in input termination?
The DS25CP104A has integrated 100Ω input termination, while the DS25CP114 requires external termination.
- What is the function of the LOS circuitry in the DS25CP104ATSQX/NOPB?
The LOS circuitry detects open input conditions and informs the system via the SMBus interface.
- What is the ESD protection level for the LVDS I/O pins of the DS25CP104ATSQX/NOPB?
The LVDS I/O pins have 8 kV ESD protection.
- In what modes can the DS25CP104ATSQX/NOPB operate?
The device operates in Pin Mode and SMBus Mode.
- What is the typical supply current for the DS25CP104ATSQX/NOPB when PWDN = 0?
The typical supply current is 50 mA when PWDN = 0.
- What are some common applications for the DS25CP104ATSQX/NOPB?
Common applications include video and data communication systems, backplane and cable interconnects, and high-speed data centers.
- What is the operating temperature range for the DS25CP104ATSQX/NOPB?
The operating temperature range is from -40°C to 85°C.
