Overview
The DS90LV804TSQ is a four-channel 800 Mbps LVDS (Low-Voltage Differential Signaling) buffer/repeater produced by Texas Instruments. This component is designed to enhance signal integrity in large systems where signals are distributed across cables, and the data rate, cable type, length, and termination scheme significantly impact signal quality.
The device features internal input and output terminations to eliminate the need for external components, thereby improving performance and reducing board space. It is particularly useful for boosting signals over lossy cables or in point-to-point backplane configurations.
Key Specifications
| Parameter | Value |
|---|---|
| Data Rate per Channel | 800 Mbps |
| Input/Output Compatibility | LVDS/CML/LVPECL input, LVDS output |
| Internal Termination | 100Ω input and output termination |
| ESD Protection | 12 kV on LVDS outputs |
| Supply Voltage | 3.3V ± 5% |
| Operating Temperature Range | -40°C to +85°C |
| Package Type | WQFN (Leadless Leadframe Package), 32 pins |
| Power Consumption | Very low power consumption |
Key Features
- 800 Mbps data rate per channel
- Low output skew and jitter
- LVDS/CML/LVPECL compatible input, LVDS output
- On-chip 100Ω input and output termination
- 12 kV ESD protection on LVDS outputs
- Single 3.3V supply
- Very low power consumption
- Industrial -40 to +85°C temperature range
- Small WQFN package footprint
- Output enable pin for TRI-STATE mode
Applications
The DS90LV804TSQ is optimized for point-to-point backplane and cable applications, making it suitable for various high-speed data transmission scenarios. It is particularly useful in systems where signal integrity over longer cables is critical, such as in telecommunications, data centers, and high-performance computing environments.
The device can also be used in applications requiring low power consumption and compact footprint, such as in handheld devices, cellular phones, and other small-scale electronic systems.
Q & A
- What is the data rate per channel of the DS90LV804TSQ?
The data rate per channel is 800 Mbps.
- What types of input signals does the DS90LV804TSQ support?
The device supports LVDS, CML, and LVPECL input signals.
- What is the purpose of the internal termination resistors in the DS90LV804TSQ?
The internal termination resistors (100Ω) are used to improve signal integrity and reduce the need for external components, minimizing board space.
- What is the operating temperature range of the DS90LV804TSQ?
The operating temperature range is -40°C to +85°C.
- What is the package type and pin count of the DS90LV804TSQ?
The device is available in a WQFN (Leadless Leadframe Package) with 32 pins.
- How does the output enable pin function in the DS90LV804TSQ?
The output enable pin allows the user to place the LVDS outputs and internal biasing generators in a TRI-STATE, low power mode.
- What is the ESD protection level on the LVDS outputs of the DS90LV804TSQ?
The LVDS outputs have 12 kV ESD protection.
- Can the DS90LV804TSQ be used in multidrop signaling environments?
No, the output characteristics of the DS90LV804TSQ are optimized for point-to-point backplane and cable applications and are not intended for multipoint or multidrop signaling.
- How can input failsafe biasing be implemented in the DS90LV804TSQ?
Input failsafe biasing can be implemented using external pull-up and pull-down resistors to provide an offset under open-circuit conditions, with the common-mode bias point set to approximately 1.2V.
- What are the advantages of the WQFN package used in the DS90LV804TSQ?
The WQFN package offers low thermal resistance, reduced electrical parasitics, improved board space efficiency, reduced package height, and reduced package mass.
