Overview
The SN65LVDS95DGGRG4, produced by Texas Instruments, is a Low-Voltage Differential Signaling (LVDS) serializer/deserializer (SerDes) transmitter. This integrated circuit is designed to efficiently transmit 21 bits of single-ended Low-Voltage TTL (LVTTL) data over four balanced-pair conductors. It features three 7-bit parallel-load serial-out shift registers, a 7× clock synthesizer, and four LVDS line drivers. The device operates from a single 3.3-V supply, consumes minimal power, and is suitable for point-to-point subsystem communication with very low Electromagnetic Interference (EMI).
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage Range | -0.5 | 4 | V | |
| Operating Free-Air Temperature Range | -40 | 85 | °C | |
| Input Voltage Threshold | 1.4 | V | ||
| Differential Steady-State Output Voltage Magnitude | 247 | 354 | 454 | mV |
| Input Clock Period | 14.7 | 50 | ns | |
| High-Level Input Clock Pulse Width Duration | 0.4tc | 0.6tc | ns | |
| Data Setup Time Before CLKIN↑ | 3 | ns | ||
| Data Hold Time After CLKIN↑ | 1.5 | ns | ||
| Quiescent Current (Average) | 85 | 110 | mA |
Key Features
- 3:21 Data Channel Compression at up to 1.428 Gigabits/s Throughput
- Suited for point-to-point subsystem communication with very low EMI
- 21 data channels plus clock in low-voltage TTL and 3 data channels plus clock out in low-voltage differential signaling
- Operates from a single 3.3-V supply and consumes 250 mW (typical)
- 5-V tolerant data inputs
- Rising clock edge triggered inputs
- Bus pins tolerate 6-kV HBM ESD
- Packaged in thin shrink small-outline package with 20 mil terminal pitch
- Consumes less than 1 mW when disabled
- Wide phase-lock input frequency range from 20 MHz to 68 MHz
- No external components required for PLL
- Inputs meet or exceed the requirements of ANSI EIA/TIA-644 standard
- Industrial temperature qualified from -40°C to 85°C
Applications
The SN65LVDS95 is widely used in various high-speed data communication applications, including:
- Data centers for high-density and high-speed data transmission
- Automotive electronics for reliable and low-EMI communication
- Telecommunication systems requiring efficient data serialization and deserialization
- Other high-speed electronic systems where minimizing I/O pins and simplifying design complexity are crucial
Q & A
- What is the primary function of the SN65LVDS95?
The SN65LVDS95 is a serializer/deserializer (SerDes) transmitter that converts 21 bits of single-ended LVTTL data into serial data transmitted over four balanced-pair conductors.
- What is the operating voltage range of the SN65LVDS95?
The device operates from a single 3.3-V supply.
- What is the maximum throughput of the SN65LVDS95?
The SN65LVDS95 supports data channel compression at up to 1.428 Gigabits/s throughput.
- What are the key features of the SN65LVDS95 in terms of EMI and power consumption?
The device is suited for point-to-point subsystem communication with very low EMI and consumes less than 1 mW when disabled.
- What is the temperature range for the SN65LVDS95?
The device is industrial temperature qualified and operates over ambient air temperatures of -40°C to 85°C.
- Does the SN65LVDS95 require external components for PLL operation?
No, the SN65LVDS95 does not require external components for PLL operation.
- What are the input voltage tolerance and ESD protection of the SN65LVDS95?
The device has 5-V tolerant data inputs and bus pins that tolerate 6-kV HBM ESD.
- What is the packaging of the SN65LVDS95?
The device is packaged in a thin shrink small-outline package with a 20 mil terminal pitch.
- What are the typical applications of the SN65LVDS95?
The SN65LVDS95 is used in data centers, automotive electronics, telecommunication systems, and other high-speed electronic systems.
- How does the SN65LVDS95 handle data transmission and clocking?
The device loads data bits into registers on the rising edge of the input clock signal and serially unloads the data using a 7× clock synthesizer.
- What is the role of the shutdown/clear (SHTDN) input in the SN65LVDS95?
The SHTDN active-low input inhibits the clock and shuts off the LVDS output drivers for lower power consumption and clears all internal registers to a low level.
