Features Up to 1050 Mbits/sec data throughput 10 MHz to 50 MHz input clock support Supports 18-bit color depth (RGB666 + HS, VS, DE) Embedded clock with DC Balanced coding to support AC-coupled interconnects Capable to drive up to 10 meters shielded twisted-pair Bi-directional control interface channel with I 2C support I 2C interface for device configuration. Single-pin ID addressing Up to 4 GPI on DES and GPO on SER AT-SPEED BIST diagnosis feature to validate link integrity Individual power-down controls for both SER and DES User-selectable clock edge for parallel data on both SER and DES Integrated termination resistors 1.8V- or 3.3V-compatible parallel bus interface Single power supply at 1.8V IEC 61000–4–2 ESD compliant Temperature range −40°C to +85°C DESERIALIZER — DS92LX2122 No reference clock required on Deserializer Programmable Receive Equalization LOCK output reporting pin to ensure EMI/EMC Mitigation Programmable Spread Spectrum (SSCG) outputs Receiver Output Drive Strength control (RDS) Receiver staggered outputs Description The DS92LX2121/DS92LX2122 chipset offers a Channel Link III interface with a high-speed forward channel and a full-duplex control channel for data transmission over a single differential pair. The DS92LX2121/DS92LX2122 incorporates differential signaling on both the high-speed and bi-directional back channel control data paths. The Serializer/ Deserializer pair is targeted for direct connections between graphics host controller and displays modules. This chipset is ideally suited for driving video data to displays requiring 18-bit color depth (RGB666 + HS, VS, and DE) along with a bi-directional back channel control bus. The primary transport converts 21 bit data over a single high-speed serial stream, along with a separate low latency bi-directional back channel transport that accepts control information from an I2C port. Using National’s embedded clock technology allows transparent full-duplex communication over a single differential pair, carrying asymmetrical bi-directional back channel control information in both directions. This single serial stream simplifies transferring a wide data bus over PCB traces and cable by eliminating the skew problems between parallel data and clock paths. This significantly saves system cost by narrowing data paths that in turn cable width, connector size and pins. In addition, the Deserializer provides input equalization to compensate for loss from the media over longer distances. Internal DC balanced encoding/decoding is used to support AC-Coupled interconnects. A sleep function provides a power-savings mode when the high speed forward channel and embedded bi-directional control channel are not needed. The Serializer is offered in a 40-pin lead in LLP and Deserializer is offered in a 48-pin LLP packages. Applications Industrial Displays, Touch Screens Medical Imaging

Also Recommended DS92LX2121▲ Companion Serializer Typ Application -- Front Page

Typical Application *click for larger image Typ Application -- Front Page	Block Diagram *click for larger image Chipset Block Diagram

Parameters / Values	DS92LX2122	DS92LX2121
Function	Deserializer	Serializer
Total Throughput	1050 Mbps	1050 Mbps
Payload/Channel	1050 Mbps	1050 Mbps
Signal Conditioning	EQ Input
Clock Min	10 MHz	10 MHz
Clock Max	50 MHz	50 MHz
Input Compatibility	CML	LVCMOS
Output Compatibility	LVCMOS	CML
Reference Clock Req'd Deserializer	No
Start/Stop Bit	Yes	Yes
EMI Reduction	SSCG, Slew Rate Control
Other Supply	1.8V or 3.3V VDDIO	1.8V or 3.3V VDDIO
SupplyVoltage	1.8 Volt	1.8 Volt
Special Features	Embedded Bi-directional Control Channel	Embedded Bi-directional Control Channel
ESD	8 kV	8 kV
Temperature Min	-40 deg C	-40 deg C
Temperature Max	85 deg C	85 deg C
Compression Ratio	1:21	21:1
Parallel Bus Width	21 bits	21 bits
JTAG1149.1	No	No
Automotive	No	No
PowerWise	No	No
Communications	No	No
Sensing & Imaging	No	No

Datasheets

Title		Size	Date	Other Language
	DS92LX2122 10 - 50 MHz DC-Balanced Channel Link III Bi-Directional Control Deserializer	833 Kbytes	12-Jul-11

Application Notes

Title		Size	Date	Other Language
	AN-1909: Application Note 1909 DS15BA101 and DS15EA101 Enable Long Reach Applications for Embedded Clock SER/DES	360 Kbytes	2-Mar-09	中文

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
DS92LX2122SQ/NOPB RoHS Status	LLP	Full production Lead Time: 6 weeks	Distributor Region Qty DIGI-KEY Worldwide 0	$5.30 each at 1K+ pcs	reel of 2500
DS92LX2122SQE/NOPB RoHS Status	LLP	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 495 AVNET-EM Worldwide 500 DIGI-KEY Worldwide 337 FARNELL Europe and Asia 244 MOUSER Worldwide 140 TAYLOR Americas 495	$5.30 each at 1K+ pcs	reel of 250
DS92LX2122SQX/NOPB RoHS Status	LLP	Full production Lead Time: 6 weeks	Distributor Region Qty DIGI-KEY Worldwide 0	$5.30 each at 1K+ pcs	reel of 2500

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for DS92LX2122.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for DS92LX2122 is located at RoHS Status.

Part Number(s) (NSID)	Description	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LX21EVK01/NOPB	LX21EVK01 Evaluation Kit	Preliminary Lead Free (RoHS)	Distributor Region Qty DIGI-KEY Worldwide 0 MOUSER Worldwide 2	$350.00 each	1
Description: The LX21EVK01 is an evaluation kit designed to demonstrate the performance and capabilities of the DS92LX2121 and DS92LX2122 Channel Link III Serializer/Deserializer chipset. The DS92LX2121 serializer board accepts LVCMOS input signals for the high speed forward channel and provides additional LVCMOS I/Os for I2C communication and general purpose control channel signals. A single serialized Channel Link III differential data pair is used for the serial interconnect. The DS92LX2122 deserializer board converts the Channel Link III data stream back into parallel LVCMOS signals and also provides LVCMOS I/Os for I2C communication and general purpose control channel signals. A USB cable is provided as a generic medium for the high speed data link. Contents: One serializer board with the DS92LX2121 One deserializer board with the DS92LX2122 One 2-meter USB 2.0 Hi-SPEED cable assembly Evaluation kit documentation What the user needs to provide: A 21-bit data bus and clock source with LVCMOS outputs – for example a video generator A data error checker or display with LVCMOS inputs – for example an LCD panel and interface from the deserializer board to the panel itself, or test equipment An I2C master device Power supply for both boards

National Semiconductor follows the provisions of the Product Stewardship Guide for Customers (CSP-9-111C1) and Banned Substances and Materials of Interest Specification (CSP-9-111S2) for regulatory environmental compliance. Details may be found at: www.national.com/en/packaging/greennopb.html. Lead free products are RoHS compliant.

Lead Free product status is available through the search tool located here

Part Number(s) (NSID)	Weight (milligrams)	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
DS92LX2122SQ/NOPB	123.191 123.695	LLP	48	3	260	Detail	N/A	N/A	NS UZXYTTE# LX2122
DS92LX2122SQE/NOPB	123.191 123.695	LLP	48	3	260	Detail	N/A	N/A	NS UZXYTTE# LX2122
DS92LX2122SQX/NOPB	123.191 123.695	LLP	48	3	260	Detail	N/A	N/A	NS UZXYTTE# LX2122

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for DS92LX2122.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for DS92LX2122 is located at RoHS Status.

CAD Symbols and Models N/A

Models N/A

Channel Link II & III SerDes for Imaging & Display Applications Loading video...

Channel Link II & III SerDes for Imaging & Display Applications Date: 2010-07-28 Length: 0:05:31