Analog Devices Inc./Maxim Integrated MAX9271GTJ/V+T

Overview

MAX9271GTJ/V+T from Maxim Integrated is a 16-bit Gigabit Multimedia Serial Link (GMSL) serializer designed for automotive camera systems, driving 50Ω coax or 100Ω STP cables up to 15m at full speed. It supports single/double-input parallel video data (6.25–100MHz pixel clock), embeds a bidirectional control channel (9.6kbps–1Mbps UART/I²C), and delivers 1.5Gbps serial bit rate with programmable pre/deemphasis and spread spectrum.

For engineers reviewing the MAX9271GTJ/V+T datasheet, MAX9271GTJ/V+T pinout, MAX9271GTJ/V+T application, or MAX9271GTJ/V+T equivalent, key selection criteria include coax/STP cable drive capability, GMSL compatibility with MAX9272 deserializer, dual-mode control channel flexibility, ESD robustness (±10kV contact per ISO 10605), and operation across -40°C to +105°C.

Technical Context

The MAX9271GTJ/V+T implements a CML-based serial transmitter with configurable output amplitude (300–500mV differential) and programmable spread-spectrum modulation (up to ±0.5% center frequency deviation). Its input PLL supports jitter attenuation and tracks spread spectrum on the parallel pixel clock (PCLKIN).

It integrates a dual-mode embedded control channel supporting UART-to-UART, UART-to-I²C, and I²C-to-I²C modes with clock-stretch capability, enabling concurrent register access to serializer, deserializer, and camera peripherals independent of video timing. Error detection uses CRC and Hamming coding, with optional PRBS generation for BER testing.

Key Specifications

Pinout & Package

The MAX9271GTJ/V+T is housed in a 32-pin, 5mm × 5mm TQFN-EP package with 0.5mm lead pitch and exposed pad for thermal dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar GMSL serializer applications.

Compared with MAX9271GTJ+ and MAX96705GTJ/V+T, the MAX9271GTJ/V+T uniquely delivers 1.5Gbps with double-rate clocking, full spread-spectrum control, and integrated PRBS testing-making it the only option qualified for high-resolution, EMI-sensitive forward ADAS camera links.

Availability

MAX9271GTJ/V+T is available at Aetrix Electronics and suitable for automotive camera systems, ADAS domain controllers, and surround-view video hubs requiring stable component supply, extended temperature operation, and GMSL ecosystem compatibility.

Supply support for MAX9271GTJ/V+T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated, now part of Analog Devices, designs precision analog, mixed-signal, and power management ICs for automotive, industrial, and communications markets.

The MAX9271GTJ/V+T belongs to Maxim's GMSL serializer product line, engineered specifically for high-bandwidth, low-latency, ESD-hardened video transmission in automotive camera modules and ADAS systems.

FAQ

What is the maximum supported pixel clock frequency for MAX9271GTJ/V+T in double-input mode?

The MAX9271GTJ/V+T supports up to 100MHz pixel clock frequency in double-input mode. This mode registers two pixels per PCLKIN cycle, effectively doubling the data throughput without requiring an external clock multiplier. At 100MHz double-input, the device achieves its full 1.5Gbps serial bit rate while maintaining timing margin and signal integrity over 15m coax cable. The MAX9271GTJ/V+T datasheet confirms this specification under "Data-Rate Selection" and "Typical Operating Characteristics."

Does MAX9271GTJ/V+T support both coaxial and shielded twisted-pair (STP) cable interfaces?

Yes, the MAX9271GTJ/V+T is explicitly designed to drive both 50Ω coaxial cable (with FAKRA connectors) and 100Ω shielded twisted-pair (STP) cable. Its CML output driver is configurable for either topology via register settings and external termination. The device meets ISO 10605 and IEC 61000-4-2 ESD standards in both configurations, and its pre/deemphasis settings are optimized for loss compensation across both media types. This dual-cable support is documented in the MAX9271GTJ/V+T General Description and Applications sections.

Can MAX9271GTJ/V+T communicate with I²C peripherals through its embedded control channel?

Yes, the MAX9271GTJ/V+T supports I²C-to-I²C mode on its embedded control channel, operating at up to 400kbps with clock-stretch capability. In this mode, a host microcontroller can transparently route I²C commands-including START/STOP, address, and data bytes-to downstream peripherals (e.g., camera ISPs or sensor registers) via the MAX9271GTJ/V+T's RX/SDA and TX/SCL pins. This functionality is detailed in the "I²C Communication with Remote-Side Devices" section of the MAX9271GTJ/V+T datasheet.

What GPIO capabilities does MAX9271GTJ/V+T provide for camera system integration?

The MAX9271GTJ/V+T provides one dedicated GPIO (LCCEN), four optional GPIOs (GPIO0–GPIO3), and a dedicated GPO output. These support remote camera power-up sequencing, frame synchronization triggers, status signaling, and local wake-up from sleep mode. The GPO is specifically designed for camera frame-sync timing with sub-microsecond jitter. All GPIOs are configurable as inputs or outputs and tolerate 1.7–3.6V I/O supply, enabling direct interfacing with common camera module voltage domains. This is specified in the "Peripheral Features" and "GPIOs" sections of the MAX9271GTJ/V+T datasheet.

Is MAX9271GTJ/V+T compatible with the MAX9272 deserializer?

Yes, the MAX9271GTJ/V+T is fully compatible with the MAX9272 deserializer as a matched GMSL link pair. They share identical data framing, control channel protocols, spread-spectrum synchronization, and error-correction schemes (CRC + Hamming). The MAX9271GTJ/V+T datasheet explicitly states "The device pairs with the MAX9272 deserializer" in its General Description and confirms interoperability in the "Compatibility with Other GMSL Devices" section. No configuration translation or protocol adaptation is required.