CH7318C

If you have questions about the product, or encounter any, you can register the site account,
Then go to the technical support forum to ask for help.

Features

  • Converts low-swing AC coupled differential input to HDMI 1.4a compliant open-drain current steering Rx terminated differential output.

  • HDMI TMDS level shifting operation up to 1.65Gb/s per lane (165MHz pixel clock).

  • Enable feature to turn off TMDS inputs and outputs and to enter low-power state.

  • Transparent operation: no re-timing or configuration required.

  • Inter-Pair added skew < 250ps

  • Intra-Pair added skew < 10ps

  • Switching power only from a single 3.3V supply.

  • Integrated 50-ohm termination resistors for AC coupled differential Inputs.

  • Pass-gate voltage limiters allow 3.3V termination on GMCH pins, 5V DDC termination on HDMI connector pins.

  • Human Body Model ESD protection: 8kV for all output pins and 2kV for all other pins.

  • Level shifter for HDMI 1.4a HPD.

  • Integrated pull-down resistor on HPD_SINK input guarantees “input low” when no display is plugged in.

  • Driver’s current adjustment +10%.

  • Inverting buffer for HPD signal

  • Configurable pre-emphasis level (0dB, 2.0dB, 4.0 dB, & 6.0dB)

  • Offered in a 48-Pin QFN Package.

Describe

CH7318C is a high speed HDMI level shifter that converts low-swing AC coupled differential input to HDMI 1.4a compliant open-drain current steering Rx terminated differential output.

The CH7318C features integrated parallel termination resistors (50-ohm), which eliminate the requirement for external termination resistors on the TMDS differential output pins. This device has incorporated a ESD protection for DDC channels as well as TMDS signal lines. In addition, the DDC_EN pin controls bias voltage to enable or disable the DDC passgate level shifter gates. The OE* pin is a two- state output enable control for the differential input and the TMDS signal output. It can activate IN_Dx pins and OUT_Dx pins or switch them into high impedance. A unique pre-emphasis control is also implemented into CH7318C; this feature has four-level adjustment to increase rise and fall times which are degraded during the transmission over a long trace on PCB.

The device operates from a single +3.3V supply, and is characterized the operation temperature range from 0 °C to 70 °C (ambient temperature). The CH7318C is available in a 48-Pin QFN package.

Structure diagram

Data sheet

Application Desc

  •   PCB Layout and Design Considerations for CH7318C, AN-B003

Technical Report

暂无信息

Specifications

Input Interface  HDMI, DVI

Output Interface  HDMI, DVI

Audio Interface  No

Other features  No

Package Type  QFN48

OrderInfo

Part Number Package Type Number of Pins Voltage Supply

CH7318C-BF Lead Free - QFN483.3V

CH7318C-BF-TR Lead Free - QFN in Tape & Reel483.3V

Video

暂无信息
ShareWEB:

ABOUT

more
About Chrontel Overview Chrontel, headquartered in San Jose, California, is a privately-held company with over 130 employees worldwide. Incorporated in 1986, the company develops and markets mixed-signal integrated circuits for the PC, display and consumer mark...

CONTACT US


Address:2210 O’Toole Ave. Suite 100, San Jose, CA 95131-1326

TEL: (408) 383-9328

FAX: (408) 383-9338

Contact:sales@chrontel.com

Copyright © 1998-2017 Chrontel, Inc. All Rights Reserved.          Privacy protection Legal statement