Infineon Technologies CY7C9335A-270AXC

Overview

CY7C9335A-270AXC from Cypress Semiconductor is a dual-standard SMPTE-259M/DVB-ASI descrambler/framer-controller IC for broadcast video infrastructure. 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 for baseband video signal recovery.

For engineers reviewing the CY7C9335A-270AXC datasheet, CY7C9335A-270AXC pinout, CY7C9335A-270AXC application, or CY7C9335A-270AXC equivalent, key selection considerations include SMPTE/DVB mode switching via DVB_EN, H_SYNC timing alignment, SYNC_ERR error flag behavior under SYNC_EN control, and parallel 10-bit data path routing with bypass capability for raw diagnostics.

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-all clocked by the recovered 27 MHz CKR input. The device supports dynamic reframe on offset mismatch when SYNC_EN is active.

In DVB-ASI mode (DVB_EN = LOW), it disables SMPTE-specific logic and enables A/B-controlled inversion for inverted 8B/10B streams, while outputting PD9(RVS) as error type indicator and PD0(SC/D) as command/data flag. All control inputs (BYPASS, SYNC_EN, DVB_EN) are sampled synchronously on the rising edge of CKR.

Key Specifications

Pinout & Package

Package: 100-pin Thin Quad Flat Pack (TQFP), 0.5 mm pitch, body size 14 × 14 mm, lead count 100, exposed pad not specified.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LMH0384 and GS2971, the CY7C9335A offers unique dual-protocol agility with minimal external components, making it optimal for cost-sensitive, space-constrained broadcast gear requiring both SMPTE and DVB-ASI support without full 3G-SDI upgrade paths.

Availability

CY7C9335A-270AXC is available at Aetrix Electronics and suitable for SD/HD broadcast encoders, video distribution switchers, studio monitor interfaces, and field test diagnostic tools requiring stable component supply across long-lifecycle broadcast equipment programs.

Supply support for CY7C9335A-270AXC 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 Corporation, now part of Infineon Technologies, designs high-performance mixed-signal ICs for communications, computing, and industrial applications, with emphasis on reliability and signal integrity.

The CY7C9335A belongs to Cypress's broadcast video interface product line, engineered specifically to simplify SMPTE-259M and DVB-ASI interoperability in professional video equipment without requiring FPGA-based protocol translation.

FAQ

What is the function of the A/B output pin?

The A/B output pin controls the CY7B9334 HOTLink® receiver's port selection to invert the DVB-ASI data stream when statistical error rates indicate signal inversion-common after passing through SMPTE switches. It is only active in DVB-ASI mode (DVB_EN = LOW) and requires connection to the CY7B9334 A/B input via a resistive divider. In SMPTE mode, A/B may be left unconnected.

How does SYNC_EN affect TRS synchronization behavior?

When SYNC_EN is HIGH, the CY7C9335A detects TRS offset mismatches but delays updating the internal character offset register until the next consecutive TRS sequence-preventing spurious frame shifts during transient sync loss. When SYNC_EN is LOW, every detected TRS immediately updates the offset and toggles H_SYNC, enabling aggressive sync acquisition at the cost of potential instability in noisy links.

Can the CY7C9335A operate without the CY7B9334 deserializer?

No-the CY7C9335A expects 10-bit parallel data synchronized to a recovered 27 MHz CKR clock, which is natively provided only by the CY7B9334 HOTLink® deserializer. Its input timing, pin assignments (e.g., D9=RVS, D0=SC/D), and functional dependencies (e.g., A/B feedback loop) are co-designed with the CY7B9334 and not compatible with generic parallel interfaces or other deserializers.

What does PD9(RVS) indicate in DVB-ASI mode?

In DVB-ASI mode (DVB_EN = LOW), PD9(RVS) serves as an error type indicator: when HIGH, it signals that an error has been detected in the current 10-bit character, and the remaining bits PD8–PD0 encode the specific error category (e.g., disparity error, invalid code, or K28.5 fill). This enables real-time DVB-ASI link health monitoring without external decoding logic.