Overview
The SN65LVDS108DBTR, produced by Texas Instruments, is an 8-Port Low-Voltage Differential Signaling (LVDS) Repeater. This device is configured as one differential line receiver connected to eight differential line drivers, making it ideal for point-to-point or point-to-multipoint (distributed simplex) baseband data transmission. It operates within a temperature range of –40°C to 85°C and is designed to meet or exceed the requirements of the ANSI EIA/TIA-644 standard.
The SN65LVDS108DBTR is part of a family of LVDS splitters and repeaters, offering low power consumption, low noise emission, high noise immunity, and high switching speeds. The device is packaged in a Thin Shrink Small-Outline Package (TSSOP) with a 20-mil terminal pitch.
Key Specifications
| Parameter | Min | Nom | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VCC) | 3 | 3.3 | 3.6 | V |
| High-Level Input Voltage (VIH) | 2 | V | ||
| Low-Level Input Voltage (VIL) | 0.8 | V | ||
| Operating Free-Air Temperature (TA) | -40 | 85 | °C | |
| Differential Output Voltage Magnitude (|VOD|) | 247 | 340 | 454 | mV |
| Propagation Delay Time (tPLH, tPHL) | 1.6 | 2.8 | 4.5 | ns |
| Differential Output Signal Rise/Fall Time (tr, tf) | 0.3 | 0.8 | 1.2 | ns |
| Pulse Skew (tsk(p)) | 150 | ps |
Key Features
- One line receiver and eight line drivers configured as an 8-Port LVDS Repeater.
- Meets or exceeds ANSI EIA/TIA-644 standard for LVDS signaling.
- Typical data signaling rates up to 400 Mbps or clock frequencies up to 400 MHz.
- Enabling logic allows individual control of each driver output and all outputs collectively.
- Low-voltage differential signaling with typical output voltage of 350 mV and a 100-Ω load.
- Electrically compatible with LVDS, PECL, LVPECL, LVTTL, LVCMOS, GTL, BTL, CTT, SSTL, or HSTL outputs with external termination networks.
- Propagation delay times less than 4.7 ns and output skew less than 300 ps.
- Total power dissipation at 200 MHz typically less than 330 mW with 8 channels enabled.
- Driver outputs or receiver input equals high impedance when disabled or with VCC < 1.5 V.
- Bus-pin ESD protection exceeds 12 kV.
- Fail-safe feature to handle open-circuit conditions by pulling each line of the signal pair to near VCC.
Applications
The SN65LVDS108DBTR is designed for point-to-point or point-to-multipoint (distributed simplex) baseband data transmission on controlled impedance media, such as printed-circuit board traces, backplanes, or cables.
It is particularly advantageous for implementing system clock or data distribution trees due to its precise timing alignment and low pulse skew. This device is also useful in applications requiring high-speed data transmission with low power consumption and high noise immunity.
Additional applications include:
- Clock distribution systems.
- Data distribution networks.
- High-speed data transmission systems.
- Systems requiring low power consumption and high noise immunity.
Q & A
- What is the operating temperature range of the SN65LVDS108DBTR?
The SN65LVDS108DBTR operates within a temperature range of –40°C to 85°C.
- What is the typical data signaling rate of the SN65LVDS108DBTR?
The typical data signaling rate is up to 400 Mbps or clock frequencies up to 400 MHz.
- How many differential line drivers does the SN65LVDS108DBTR have?
The device has eight differential line drivers.
- What is the differential output voltage magnitude of the SN65LVDS108DBTR?
The differential output voltage magnitude is between 247 mV and 454 mV.
- Does the SN65LVDS108DBTR have individual control for each driver output?
- What is the propagation delay time of the SN65LVDS108DBTR?
The propagation delay time is less than 4.5 ns.
- How does the SN65LVDS108DBTR handle open-circuit conditions?
The device has a fail-safe feature that pulls each line of the signal pair to near VCC when an open-circuit condition is detected.
- What is the total power dissipation of the SN65LVDS108DBTR at 200 MHz?
The total power dissipation is typically less than 330 mW with 8 channels enabled.
- Is the SN65LVDS108DBTR compatible with other logic standards?
- What is the ESD protection level of the SN65LVDS108DBTR?
The bus-pin ESD protection exceeds 12 kV.
