MAX9295D: Dual Input GMSL2TM Serializer

Drivers and Interfaces18 Oct 2024

In GMSL2 mode, the MAX9295D operates at a fixed rate of 3Gbps or 6Gbps in the forward direction and 187.5Mbps in the reverse direction. In GMSL1 mode, the MAX9295D can be paired with first-generation 3.12Gbps or 1.5Gbps GMSL1 deserializers or operate up to 4.5Gbps with GMSL2 deserializers configured for GMSL1 mode. Operation is specified over the automotive temperature range of -40°C to +105°C and the device is AEC-Q100 Grade 2 qualified. Cable can be coaxial or shielded twisted pair (STP).

	3.2mm Ø 50Ω Coax, Foam Dielectric	2.7mm Ø 50Ω Coax, Solid Dielectric	100Ω Shielded-Twisted Pair, AWG26
Attenuation at 3GHz (Typ, Room Temp)	0.9dB/m	1.6dB/m	1.8dB/m
Attenuation at 3GHz (Max, Aged, +105°C)	1.1dB/m	2.0dB/m	2.2dB/m
GMSL Fwd/Rev Data Rate	Typical Maximum Cable Length at +105°C
3Gbps/187.5Mbps	20m	10m	11m
6Gbps/187.5Mbps	15m	9m	8m

Table 1: Typical Maximum Cable Length vs. Attenuation

Key Features and Benefits

Dual 4-Lane MIPI CSI-2 v1.3 Ports
- MIPI D-PHY v1.2 at 80Mbps
- 2.5Gbps per Lane
- 4-Channel CSI-2 Virtual-Channel Support
- Support for RAW8/10/12/14/16/20, RGB565/666/888 and YUV8-/10-Bit Data types
- CSI-2 Inputs in GMSL2 Mode Accept Cameras with Different Video Timing and Resolution
- CSI-2 ECC and Checksum Error Detection and Flagging
- CSI-2 Lane Reassignment and Polarity Flip
Selectable GMSL2 at 3/6Gbps or Backward-Compatible GMSL1 Mode
- Operates up to 4.5Gbps with GMSL2 Deserializers in GMSL1 Mode
- 187.5Mbps Reverse Link for Reduced-Size Power-over-Cable (PoC) Filter
- Forward- and Reverse-Channel PRBS for BER Testing of Serial Link
- Reverse-Channel Eye-Opening Monitor for Continuous Link-Margin Diagnosis
- Reverse-Channel Adaptive Equalization Allows Coax Cable Longer than 15m with Multiple Inline Connectors
- Crosspoint Switch Remaps Input to Any Desired Deserializer Output Order
ASIL-Relevant Functional Safety Features (GMSL2)
- ASIL-B Compliant
- 16-Bit CRC Protection of Side-Channel Data (I2C, UART, SPI, GPIO) with Retransmission upon Error Detection
- Optional 32-Bit CRC Protection of Video-Line Data
- Video Watermark Insertion and Detection
Concurrent Side Channel for Device Configuration and Communication with Peripherals
- GMSL2: I²C/UART, Dual Pass-Through I2C/UART, SPI, GPIO and Register-Programmable GPIO
- GMSL1: I²C/UART, Tunneled GPI-GPO and CNTL Links, and Register-Programmable GPIO
- Four Hardware-Selectable Device Addresses
Three Internal and Three External Supply Voltage Monitors
50Ω Coax Cable or 100Ω STP
Programmable Spread Spectrum for EMI Reduction
7mm x 7mm TQFN Package with Exposed Pad and Available Wettable Flanks
-40°C to +105°C Operating Temperature
AEC-Q100 Grade 2