MAX9257A Datasheet, PDF (1/53 Pages) Maxim Integrated Products – Fully Programmable Serializer/Deserializer with UART/I2C Control Channel

19-5891; Rev 0; 6/11
EVALUATION KIT AVAILABLE
MAX9257A/MAX9258A
Fully Programmable Serializer/Deserializer
with UART/I²C Control Channel
General Description
The MAX9257A serializer pairs with the MAX9258A
deseri­alizer to form a complete digital video serial link.
The devices feature programmable parallel data width,
parallel clock frequency range, spread spectrum, and
preemphasis. An integrated control channel trans­fers
data bidirectionally at power-up during video blank­
ing over the same differential pair used for video data.
This feature eliminates the need for external CAN or LIN
interface for diagnostics or programming. The clock is
recovered from input serial data at MAX9258A, hence
eliminating the need for an external reference clock.
The MAX9257A serializes 10, 12, 14, 16, and 18 bits
with the addition of two encoding bits for AC-coupling.
The MAX9258A deserializer links with the MAX9257A to
deseri­alize a maximum of 20 (data + encoding) bits per
pixel/parallel clock period for a maximum serial-data rate
of 840Mbps. The word length can be adjusted to accom-
modate a higher pixel/parallel clock frequency. The pixel
clock can vary from 5MHz to 70MHz, depend­ing on the
serial-word length. Enabling parity adds two parity bits to
the serial word. The encoding bits reduce ISI and allow
AC-coupling.
The MAX9258A receives programming instructions from
the electronic control unit (ECU) during the control
channel and transmits to the MAX9257A over the serial
video link. The instructions can program or update the
MAX9257A, MAX9258A, or an external peripheral device,
such as a camera. The MAX9257A communicates with
the peripheral device with I²C or UART.
The devices operate from a +3.3V core supply and fea-
ture separate supplies for interfacing to +1.8V to +3.3V
logic levels. These devices are avail­able in 40-lead TQFN
or 48-pin LQFP packages. These devices are specified
over the -40NC to +105NC temper­ature range.
Applications
Automotive Cameras
Industrial Cameras
Navigation Systems Display
In-Vehicle Entertainment Systems
Features
S 10/12/14/16/18-Bit Programmable Parallel Data
Width
S MAX9258A Does Not Require Reference Clock
S Parity Protection for Video and Control Channels
S Programmable Spread Spectrum
S Programmable Rising or Falling Edge for HSYNC,
VSYNC, and Clock
S Up to 10 Remotely Programmable GPIO on
MAX9257A
S Automatic Resynchronization in Case of Loss of
Lock
S MAX9257A Parallel Clock Jitter Filter PLL with
Bypass
S DC-Balanced Coding Allows AC-Coupling
S Levels of Preemphasis for Up to 20m STP Cable
Drive
S Integrity Test Using On-Chip Programmable PRBS
Generator and Checker
S LVDS I/O Meet ISO 10605 ESD Protection (±10kV
Contact and ±30kV Air Discharge)
S LVDS I/O Meet IEC 61000-4-2 ESD Protection
(±8kV Contact and ±20kV Air Discharge)
S LVDS I/O Meet ±200V Machine Model ESD
Protection
S -40NC to +105NC Operating Temperature Range
S Space-Saving, 40-Pin TQFN (5mm x 5mm) with
Exposed Pad or 48-Pin LQFP Packages
S 3.3V Core Supply and 1.8V to 3.3V I/O Supply
Ordering Information appears at end of data sheet.
Typical Operating Circuit and Pin Configurations appear at
end of data sheet.
For related parts and recommended products to use with this part,
refer to www.maxim-ic.com/MAX9257A.related.
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For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.