Overview
The DS91M040TSQX/NOPB is a 125 MHz Quad M-LVDS (Multipoint Low-Voltage Differential Signaling) transceiver designed by Texas Instruments. This device is optimized for driving and receiving clock or data signals in multipoint and multidrop cable and backplane applications. It leverages M-LVDS technology, which provides increased drive current to handle double terminations required in multipoint configurations, and offers a wide input common mode voltage range to enhance noise margin in heavily loaded and noisy environments.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Power Supply Voltage | -0.3V | +4V | V | ||
| LVCMOS Input Voltage | -0.3V | VDD + 0.3V | V | ||
| LVCMOS Output Voltage | -0.3V | VDD + 0.3V | V | ||
| M-LVDS I/O Voltage | -1.9V | +5.5V | V | ||
| Junction Temperature | +140°C | °C | |||
| Storage Temperature Range | -65°C | +150°C | °C | ||
| Maximum Operating Frequency | 125 MHz | Hz | |||
| Differential Propagation Delay Low to High | RL = 50Ω, CL = 5 pF | 1.5 ns | 3.3 ns | 5.5 ns | ns |
| Rise Time | 0.3 ns | 1.1 ns | 1.6 ns | ns | |
| Fall Time | 0.3 ns | 0.65 ns | 1.6 ns | ns | |
| ESD Susceptibility (HBM) | ≥8 kV | kV |
Key Features
- DC to 125 MHz / 250 Mbps low jitter, low skew, and low power operation.
- Wide input common mode voltage range allowing up to ±1V of GND noise.
- Conforms to TIA/EIA-899 M-LVDS standard.
- Pin selectable M-LVDS receiver type (Type 1 or Type 2).
- Controlled transition times (2.0 ns typical) to minimize reflections.
- 8 kV ESD protection on M-LVDS I/O pins.
- Flow-through pinout simplifies PCB layout.
- Small 5 mm x 5 mm WQFN-32 space-saving package.
Applications
- Multidrop/multipoint clock and data distribution.
- High-speed, low power, short-reach alternative to TIA/EIA-485/422.
- Clock distribution in AdvancedTCA (ATCA) and MicroTCA (μTCA, uTCA) backplanes.
Q & A
- What is the maximum operating frequency of the DS91M040?
The maximum operating frequency is 125 MHz.
- What is the typical rise time of the DS91M040?
The typical rise time is 1.1 ns.
- What is the ESD susceptibility of the DS91M040?
The ESD susceptibility is ≥8 kV (HBM).
- What are the supported receiver types for the DS91M040?
The DS91M040 supports both M-LVDS Type 1 and Type 2 receiver inputs.
- What is the package type and size of the DS91M040?
The package type is WQFN-32, and the size is 5 mm x 5 mm.
- What are the key applications of the DS91M040?
The key applications include multidrop/multipoint clock and data distribution, high-speed alternatives to TIA/EIA-485/422, and clock distribution in ATCA and μTCA backplanes.
- What is the input common mode voltage range of the DS91M040?
The input common mode voltage range allows up to ±1V of GND noise.
- How does the DS91M040 handle reflections in multipoint configurations?
The DS91M040 has controlled transition times (2.0 ns typical) to minimize reflections.
- What is the power supply voltage range for the DS91M040?
The power supply voltage range is from -0.3V to +4V.
- Is the DS91M040 compliant with any industry standards?
Yes, it conforms to the TIA/EIA-899 M-LVDS standard.
