Cypress Semiconductor Corp CY7C9235A-270JXC

The CY7C9235A captures parallel input data on CKW and performs SMPTE transition scrambling and NRZI encoding. In DVB-ASI mode, its mode and enable controls route the character stream to the companion serializer, which performs the high-speed serial transmission. TRS detection and optional filtering support SMPTE digital-video framing.

• Supports SMPTE-259M and DVB-ASI formatting in one controller.
• Processes 8- or 10-bit parallel character streams.
• Includes TRS detection and optional low-bit TRS filtering.
• Provides bypass control for raw parallel data and test use.
• Interfaces directly with a CY7B9234 HOTLink serializer.

At a 27 million-character-per-second rate, the controller produces encoded parallel characters for a 270 Mbit/s serial link through the CY7B9234. The SMPTE path uses the x^9 + x^4 + 1 scrambler and NRZI encoding. DVB-ASI mode supports synchronous or asynchronous FIFO presentation through ENA and ENN and permits K28.5 fill generation by the companion serializer. Outputs can be placed in high impedance using OE.

The Cypress J67 drawing identifies a 44-lead plastic leaded chip carrier. The LCDChip package registry maps the catalog's 44-LCC (J-Lead) designation to the normalized 44-LCC entry and the expected 44-LCC.jpg file. Use the J67 mechanical drawing, not a generic image, for land pattern and orientation.

Layout checks

• Compare the PCB footprint with the Cypress J67 44-lead PLCC drawing.
• Check pin-one orientation and J-lead pitch before placement.
• Route CKW and parallel data for the specified setup and hold times.

The registered JPG is currently missing and must be supplied and verified before publication.

The Cypress CY7C9235A pin-description table identifies PD0–PD9 as the parallel input bus and Q0–Q9 as the encoded parallel output bus. CKW clocks synchronous operations. DVB_EN selects DVB mode when low; ENA and ENN manage DVB input data acceptance. BYPASS selects raw-data routing in SMPTE mode. TRS_FILT controls TRS filtering, TRS_DET signals a detected TRS character, and OE controls output high impedance.

Signal functions come from Cypress document 38-02082 Rev. **. Verify numeric pin assignments against the manufacturer top-view drawing during schematic review.

Timing values apply under the manufacturer's stated 5 V commercial operating conditions. Do not substitute absolute-maximum ratings for operating limits.

The archived Cypress document states pin-to-pin compatibility with the earlier CY7C9235 family, but full substitution still requires checking the exact speed grade, supply, timing, J67 package, finish, mode wiring and serializer interface. CY7C9235A-270JC is a separate ordering code and must not be assumed equivalent solely from its similar name. No database-verified alternate is linked here.

Cypress Semiconductor published CY7C9235A document 38-02082 Rev. ** in October 2003. The document includes the block diagram, pin descriptions, operating conditions, switching data and J67 package drawing. Current product availability should be confirmed with the successor manufacturer or an authorized legacy supplier.

• SMPTE-259M standard-definition digital-video transmit paths.
• DVB-ASI transport interfaces using a CY7B9234 serializer.
• Legacy broadcast-equipment maintenance and line-card repair.

Match the full CY7C9235A-270JXC marking, J67 package, lot history and storage conditions to received material. Confirm the exact ordering suffix and material finish with controlled manufacturer records. Obtain a current, traceable supplier quotation before procurement.

Review CKW setup and hold, DVB/SMPTE mode polarity, companion serializer timing, 5 V power integrity and the J67 pin drawing before integration. The absent package JPG and unverified exact-code manufacturer ordering details prevent publication.