April 2007 LMH0341, LMH0041, LMH0071, LMH0051 3G, HD, SD, DVB-ASI SDI Deserializer with Loopthrough and LVDS Interface General Description Key Specifications The LMH0041 family of products provide a very simple 1:5 deserializer and receiver function. The device is intended to be paired with an FPGA host which will receive the raw 5 bit data words and will decode the data appropriately such that a SMPTE standard signal may be recovered. The devices are designed to receive data compliant with DVB-ASI, SMPTE 259M, SMPTE 292M and/or SMPTE 424M. The interface between the LMH0041 and the FPGA consists of a 5 bit wide LVDS bus, an LVDS clock and an SMBus interface. All devices except for the LMH0051 includes a reclocked feedthrough output with a SMPTE compliant cable driver. The LMH0341 includes support for SMPTE424M, and the LMH0071 is a Stadard Definition (SD) only variant. The product is packaged in a physically small 48 pin LLP package. ■ Output compliant with SMPTE 259M-C, SMPTE 292M, SMPTE 424M and DVB-ASI ■ Typical power dissipation: 410 mW (loopthrough disabled) ■ 0.6 UI Input Jitter Tolerance Features ■ ■ ■ ■ ■ ■ LVDS Interface Dual multiplexed inputs No external VCO or clock required Loopthrough with Cable Driver SMBus configuration interface 48 pin LLP package Applications ■ SDI interfaces for: — — — — Video Cameras DVRs Video Switchers Video Editing Systems Block Diagram 30017201 © 2007 National Semiconductor Corporation 300172 www.national.com LMH0341, LMH0041, LMH0071, LMH0051 3G, HD, SD, DVB-ASI SDI Deserializer with Loopthrough and LVDS Interface ADVANCE INFORMATION LMH0341, LMH0041, LMH0071, LMH0051 TABLE 1. Feature Table Device SMPTE 424M Support SMPTE 292M Support SMPTE 259M Support DVB-ASI Support Active Loopthrough LMH0341 × LMH0041 × × × × × × × × × × × × × LMH0071 LMH0051 × ternal framer and 8b10b decoder is engaged such that the data appearing on RX0-RX3 will represent a nibble of the decoded 8b10b data. RX4 is an Idle character detect and can be used as an enable to allow the receiver to not write data into a FIFO. RX4 is high if the data being presented on RX0-RX3 represents the idle character. The Most Significant Nibble of data is presented on the rising edge of RXCLK, and the lease significant on the falling edge of RXCLK. Device Operation The LMH0041 deserializer is used in digital video signal origination equipment. It is intended to be operated in conjunction with an FPGA host which processes the received data to recover the original parallel data from the five bit wide datapath that comes from the LMH0041. The LMH0041 requires the use of an external equalizer such as the LMH0044, which can be directly connected to the LMH0041. DVB-ASI Mode DVB-ASI mode is enabled when the DVB-ASI pin is brought to a high state. When the DVB-ASI mode is enabled, an in- www.national.com 2 LMH0341, LMH0041, LMH0071, LMH0051 Physical Dimensions inches (millimeters) unless otherwise noted 48-Lead QFN Plastic Quad Package NS Package Number SQA48A 3 www.national.com LMH0341, LMH0041, LMH0071, LMH0051 3G, HD, SD, DVB-ASI SDI Deserializer with Loopthrough and LVDS Interface Notes THE CONTENTS OF THIS DOCUMENT ARE PROVIDED IN CONNECTION WITH NATIONAL SEMICONDUCTOR CORPORATION (“NATIONAL”) PRODUCTS. NATIONAL MAKES NO REPRESENTATIONS OR WARRANTIES WITH RESPECT TO THE ACCURACY OR COMPLETENESS OF THE CONTENTS OF THIS PUBLICATION AND RESERVES THE RIGHT TO MAKE CHANGES TO SPECIFICATIONS AND PRODUCT DESCRIPTIONS AT ANY TIME WITHOUT NOTICE. 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Copyright© 2007 National Semiconductor Corporation For the most current product information visit us at www.national.com National Semiconductor Americas Customer Support Center Email: [email protected] Tel: 1-800-272-9959 www.national.com National Semiconductor Europe Customer Support Center Fax: +49 (0) 180-530-85-86 Email: [email protected] Deutsch Tel: +49 (0) 69 9508 6208 English Tel: +49 (0) 870 24 0 2171 Français Tel: +33 (0) 1 41 91 8790 National Semiconductor Asia Pacific Customer Support Center Email: [email protected] National Semiconductor Japan Customer Support Center Fax: 81-3-5639-7507 Email: [email protected] Tel: 81-3-5639-7560