概览
The GS3440 is a high-speed BiCMOS integrated circuit designed to equalize and restore signals received over 75ohm coaxial cable.
The device is designed to support SMPTE ST 424, SMPTE ST 292 and SMPTE ST 259, and is optimized for performance at 270Mbps, 1.485Gbps and 2.97Gbps.
The GS3440 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 SLEEP pin to enable automatic power-down upon loss of carrier. In the manual sleep mode, a voltage programmable threshold, which can be changed via the SQ_ADJ pin, forces CD high when the input signal amplitude falls below the threshold. This allows the GS3440 to distinguish between low-amplitude SDI signals and noise at the input of the device.
当旁路引脚为高电平时，均衡和直流恢复级将断开。在旁路模式下不发生均衡。
The GS3440 includes a gain selection pin (GAIN_SEL) which, when tied HIGH, compensates for 6dB flat attenuation.
The differential outputs can be DC-coupled to all Gennum® cable drivers and reclockers and to industry-standard 1.2V, 2.5V and 3.3V CML logic using the VCC_O pin. In general, DC-coupling to any termination voltage between 1.2V and 3.3V is supported.
The GS3440 also includes programmable de-emphasis with three operating levels in order to support long PCB traces. The device is available in a 16-pin, 4mm x 4mm QFN package.
The GS3440 is Pb-free, and the encapsulation compound does not contain halogenated flame retardant.
This component and all homogeneous subcomponents are RoHS compliant.
订购代码
- GS3440-INE3: Lead-Free, RoHS Compliant, Tray-490 Pieces
- GS3440-INTE3: Lead-Free, RoHS Compliant, Tape and Reel-250 Pieces
- GS3440-INTE3Z: Lead-Free, RoHS Compliant, Tape and Reel-2500 Pieces
PB Free/ROHS
Learn More →功能
- SMPTE ST 424, SMPTE ST 292 and SMPTE ST 259 compliant
- 自动电缆均衡
- Multi-standard operation up to 2.97Gbps
- Performance optimized for 270Mbps, 1.485Gb/s and 2.97Gbps. Typical equalized length of Belden 1694A cable:
- 200m at 2.97Gbps
- 250m at 1.485Gbps
- 500m at 270Mbps
- Supports DVB-ASI at 270Mbps
- 手动旁路（适用于具有缓慢上升/下降时间的低数据速率）
- 可编程的载波检测和抑制阀值调节
- 信号丢失时自动断电
- 备用电源 < 30 mW（典型值）
- Differential outputs support DC-coupling to 1.2V, 2.5V and 3.3V CML logic
- 0/6dB gain boost selection pin
- Selectable de-emphasis: 2dB, 4dB and 6dB
- 标准 EIA/JEDEC 逻辑控制和状态信号水平
- 工作温度范围宽（-40℃ 至 +85℃）
- 小型 QFN 封装 (4 mm x 4 mm)
- Footprint compatible with the GS2974, GS2984 and GS2994
- 无铅且符合 RoHS 标准
| 文档 | Release Date | Type |  |
|---|---|---|---|
| GS3440 Datasheet | 2018-11-14 | | |
| GS3440 IBIS-AMI Model | 2019-05-22 | ZIP | |
应用
- SMPTE ST 424, SMPTE ST 292 and SMPTE ST 259 coaxial cable serial digital interfaces
Inventory
| Product | 国家/地区 | 经销商 | Qty | Buy |
|---|
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