Infineon Technologies CY7C9335A-270AXCT

Overview

CY7C9335A-270AXCT from Cypress Semiconductor is a dual-standard SMPTE-259M/DVB-ASI descrambler/framer-controller IC for broadcast video signal conditioning. It performs TRS detection, X9+X4+1 descrambling, NRZI-to-NRZ decoding, and DVB-ASI 8B/10B-aware framing at 27 MHz character rate (270 Mbps serial), operating from a single +5 V supply in a 100-pin TQFP package. It interfaces directly with CY7B9334 HOTLink® deserializers in professional video routing and digital video equipment.

For engineers reviewing the CY7C9335A-270AXCT datasheet, CY7C9335A-270AXCT pinout, CY7C9335A-270AXCT application, or CY7C9335A-270AXCT equivalent, key selection considerations include SMPTE/DVB mode switching via DVB_EN, H_SYNC timing accuracy relative to TRS alignment, SYNC_ERR pulse behavior under offset mismatch, and parallel data bus mapping (D0–D9/PD0–PD9) with RVS/SC/D signaling semantics.

Technical Context

The CY7C9335A integrates three synchronized functional blocks: a TRS detector/framer that locates 30-bit sync patterns (3FF-000-000) and aligns 10-bit character boundaries; an SMPTE-259M descrambler implementing the X9+X4+1 polynomial; and an NRZI-to-NRZ decoder for baseband recovery. All operate synchronously at the 27 MHz recovered clock (CKR), derived from the CY7B9334 deserializer.

In DVB-ASI mode (DVB_EN = LOW), the device bypasses SMPTE-specific logic and routes raw 10-bit parallel data to outputs while enabling error flagging (PD9 = RVS), command/data identification (PD0 = SC/D), and A/B port inversion control for inverted stream correction. The RF output mirrors inverted DVB_EN, and H_SYNC is disabled during DVB operation.

Key Specifications

Pinout & Package

Package: 100-pin Thin Quad Flat Pack (TQFP), 0.5 mm pitch, body size 14 × 14 mm, lead-free and RoHS-compliant per ordering code suffix.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar SMPTE/DVB framer-controller applications.

Compared with GS2971A-IBE3 and LMH0384SQ/NOPB, the CY7C9335A-270AXCT uniquely delivers hardware-switchable SMPTE/DVB-ASI framing in a single IC with built-in TRS offset tracking, SYNC_ERR diagnostics, and A/B-controlled inversion correction - making it irreplaceable in hybrid broadcast infrastructures requiring both standards on shared hardware.

Availability

CY7C9335A-270AXCT is available at Aetrix Electronics and suitable for SD/HD video routers, broadcast signal generators, and professional video capture cards requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for CY7C9335A-270AXCT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Cypress Semiconductor (now part of Infineon Technologies) is a fabless semiconductor company specializing in programmable solutions for embedded systems, USB connectivity, memory, and high-performance video interface ICs.

The CY7C9335A belongs to Cypress's broadcast video interface product line, designed specifically to simplify SMPTE-259M and DVB-ASI signal conditioning in professional video equipment where dual-standard interoperability and deterministic sync recovery are mandatory.

FAQ

What is the function of the BYPASS pin, and when should it be asserted?

The BYPASS pin, when HIGH at the rising edge of CKR and DVB_EN = HIGH, routes input data directly from the input register to the output register-bypassing both the NRZI-to-NRZ decoder and SMPTE X9+X4+1 descrambler. It is used for diagnostic testing, raw data inspection, or interfacing with pre-descrambled/non-SMPTE streams. It has no effect when DVB_EN is LOW.

How does the CY7C9335A handle inverted DVB-ASI streams?

The CY7C9335A detects statistical errors in DVB-ASI streams and asserts its A/B output to toggle the CY7B9334 receiver's port selection, effectively inverting the incoming data path. This closed-loop correction requires A/B to be connected to the CY7B9334's A/B input via a resistive divider. The feature is active only in DVB_EN = LOW mode and requires no host intervention.

What timing relationship exists between H_SYNC and the TRS pattern?

H_SYNC toggles one CKR clock cycle before the first character (3FF) of the detected TRS sequence appears on PD0–PD9. This fixed 1-cycle delay is deterministic and independent of SYNC_EN state. When SYNC_EN = LOW, H_SYNC toggles on every TRS; when SYNC_EN = HIGH, it toggles only when TRS offset changes - enabling selective sync locking.

Can the CY7C9335A operate without the CY7B9334 deserializer?

Yes - the CY7C9335A accepts any 10-bit parallel data stream synchronized to CKR, provided D9(RVS), D0(SC/D), and other inputs meet voltage and timing specs. However, its pinout, timing margins, and functional blocks (e.g., A/B control, RVS interpretation) are optimized for direct interfacing with CY7B9334. Standalone use requires careful clock domain alignment and external NRZI/NRZ conversion if needed.