GS1674
Not recommended for new designs.
Please use the GS2994 for new designs.
The GS1674 is a high-speed BiCMOS integrated circuit designed to equalize and restore signals received over 75ohm coaxial cable. The device is optimized for performance at 270Mbps and 1.485Gbps, and features DC restoration to compensate for the DC content of SMPTE pathological test patterns.
The Carrier Detect output pin (CD) indicates whether a valid input signal has been detected. It can be connected directly to the MUTE pin to mute the output on loss of carrier. The sensitivity of the carrier detect can be easily programmed to allow the GS1674 to distinguish between low-amplitude SDI signals and noise at the input of the device. The equalizing and DC restore stages are disengaged when the BYPASS pin is HIGH. No equalization occurs in Bypass mode.
The GS1674 is footprint and drop-in compatible with existing GS1574A and LMH0044 designs, with no additional application changes required.
Features
- Replaces the LMH0044
- SMPTE 292M, SMPTE 344M and SMPTE 259M compliant
- Automatic cable equalization
- Performance optimized for 270Mbps and 1.485Gbps.
- Typical equalized length of Belden 1694A cable:
- 220m at 1.485Gbps
- 400m at 270Mbps
- Supports DVB-ASI at 270Mbps
- Manual bypass (useful for low data rates with slow rise/fall times)
- Programmable carrier detect with squelch threshold adjustment
- Standard EIA/JEDEC logic control and status signal levels
- Single 3.3V power supply operation
- 195mW power consumption (typical)
- Wide temperature range of -40ºC to +85ºC
- Small footprint QFN package (4mm x 4mm)
- Drop-in compatible with the GS1574A. Forward compatible with Gennum's 3G EQ products.
- Pb-free and RoHS compliant
- Audio De-embedders
- Audio Embedders
- Camera
- Camera Control Units
- Distribution Amplifiers
- Encoders/Decoders
- Format Detectors
- Master Control Switchers
- Monitors, Multiviewers
- Production Switchers
- Routers
- SMPTE 292M and SMPTE 259M coaxial cable serial digital interfaces
- Test and Measurement Equipment
- Up/Down/Cross Converters
- Video Capture Cards
- Video Servers
- Video Tape Recorders
Applications
Distributor/Catalog Supplier Inventory
View product availability from participating distributors below. Browse all distributers here.
| Part # | Country | Qty | Buy | Distributor |
|---|
mySemtech
Explore a wealth of downloadable resources and datasheets to assist with prototyping and production.
Looking for documentation?
Login or register for mySemtech to gain access to restricted product documentation and to add documents to your Watch List for update alerts
Resources
To see more videos Videos
I designed my first product using the Serial Digital Interface (SDI) back in 1996, and little did I know that this fledgling coax-based video interface standard would dominate my career for the next 20+ years. Back then, SDI was limited to carrying Standard Definition (SD) digital video at 270 Megabits per second (Mbps), but would evolve to higher and higher data rates to carry High Definition 720p, 1080i and 1080p, and most recently 4K Ultra High Definition (UHD) video, at cable lengths that were not thought possible. The convenience of a low cost single conductor coaxial copper cable, capable of carrying 4K video up to 100m has meant that SDI has become the de facto AV connectivity of choice in markets such as broadcast, Pro AV, medical and surveillance.
Serial Digital Interface Is Dead: Long Live SDI!
READ NOW