Serializer-Deserializer Chips for Portable Display - µSerDes - Fairchild

Fairchild’s µSerDes™ is a family of serializers-deserializers chips, designed for parallel interconnects in  small-portable display applications, cellular mobile phones especially. µSerDes offers solutions for reducing flex cable size, electromagnetic interference (EMI) and power consumption.  The serializers/deserializers are avaliable in BGA and MLP packages.

µSerDes Application in Mobile Phone

Features of Fairchild’s µSerDes includes:

• Signal reduction, 24:1 or 12:1 serialization
• Smaller Connections, smaller/narrower interconnection Flex/coax, simpler connectors and cabling, easy board layout and better hinge or slider mechanical operation, fewer components
• Reduced EMI
• Reduces radiated noise
• Eliminates shielding, filters, and other components
• Low voltage differential interconnect (patented CTL™)
• Cost Savings, savings over standard parallel implementation
• Enables next-generation display (QVGA/HVGA)

Here is list of Fairchild’s uSerDes devices: (Number of Bits and Max Frequency):

• FIN12AC: 12 bits, 40MHz 
• FIN24AC: 22 bits, 20MHz 
• FIN24C: 24bits, 20MHz
• FIN212AC: 12 bits, 40MHz 
• FIN224AC: 22 bits, 26MHz 
• FIN324C: 24 bits, 15MHz

Note: Fairchild recommends the FIN212AC, FIN224AC and FIN324C for new designs.

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Press release update:

Fairchild introduced the FIN212AC µSerDes device designed for serializing high speed CMOS or CCD image sensors signals. The FIN212AC uses Fairchild’s CTL I/O for serializing up to 12-bits data at speeds up to 40MHz. It can be configured as a signal serializer or deserializer and is implemented in pairs. The FIN212AC is suitable for portable electronics products with slider  or clamshell form factors. This µSerDes chip minimize the number of electrical wires and reduces PCB space.

The FIN212AC uSerDes chip reduces a 12-bit data path to four wires. The device can be configured as a serializer or deserializer through the DIRI pin. For camera applications, an additional master clock can be passed in the opposite direction of data flow.

Besides for cell phone applications, the FIN212AC userdes IC is also suitable for applications with similar parallel interfaces such laptops with integrated web cams, security cameras and VOIP phones.

Key features of FIN212AC serializer-deserializer chip includes:

• Operates as Serializer or Deserializer
• Adjustable Parallel Edge Rate
• Wide Parallel Supply Voltage Range: 1.65 to 3.6V
• Low Power Core Operation: VDDS/A=2.5 to 3.6V
• Built-in LV-CMOS Voltage Translation Capability with no External Components
• Wide PLL Input Frequency Range
• Built-in Differential Termination
• Standby Power-Down Mode Support
• Low Power, Proprietary, CTL I/O Serial Interface

Chris Ferland,Fairchild, said:

Fairchild has utilized its expertise gained from several years of research and development optimizing serial interface solutions for displays and reapplied this knowledge to the camera interface…

By using the FAN212AC specifically that was developed for the wide range of image sensors commonly used today, designers of cell phones and other portable electronics can now serialize both their display and camera signals. This is important since in some cases the camera design may be a more critical concern due to the EMI associated with the higher speeds of the camera interface…

The FIN212AC serializer-deserializer chip offers selectable LVCMOS edge rates and pulse width to increase design flexibility while minimizing EMI. Fairchild’s CTL technology operates well in noisy RF environments without additional metal shielding required by similar high-speed signals while offering the industry’s lowest EMI (-110dBM). These specialized features allow the designer to tune the FIN212AC to a particular frequency range and enable implementations for both RGB and µController interfaces.

The FIN212AC µSerDes chip features ultra-low, power-down mode (~0.1 µA) when not transmitting data, a solution for conserving battery life in portable applications. Additionally, the device’s ultra-small BGA and MLP packages can be mounted on a PCB or directly on the flex, providing further board-space savings and design flexibility.

The FIN212AC userdes chip is available in a 5×5mm MLP package to attach directly to a flex circuit, or in  two choices of BGA, where space constraints are a concern. Price is  $ 1.49 for BGA package and $ 1.30 for MLP.

Source: Fairchild’s µSerDes Serializer-Deserializer Chip