Infineon Technologies CY7B9234-270JXCT

Overview

CY7B9234-270JXCT from Cypress Semiconductor is a SMPTE HOTLink® transmitter IC compliant with SMPTE-259M-CD, DVB-ASI, and Fibre Channel standards; supports 270 Mbps serial data rate; features triple PECL 100K differential outputs (OUTA±/OUTB±/OUTC±); operates from single +5V supply; and is used in broadcast video transmission equipment for uncompressed SD-SDI signal serialization over coaxial or fiber links.

For engineers reviewing the CY7B9234-270JXCT datasheet, CY7B9234-270JXCT pinout, CY7B9234-270JXCT application, or CY7B9234-270JXCT equivalent, key selection criteria include SMPTE-259M-CD compliance, 8B/10B encoding capability, TTL-to-PECL interface timing, BIST support, and PLCC-28 package compatibility with legacy video routing hardware.

Technical Context

The CY7B9234-270JXCT integrates an on-chip PLL clock multiplier synchronized to CKW (byte-rate clock), enabling generation of 270 MHz serial bit clock without external components. It accepts 8-bit or 10-bit parallel TTL data (D0–D7 + SC/D + SVS) and supports both encoded (8B/10B) and bypass modes via MODE pin configuration.

Its triple PECL outputs drive terminated coaxial or fiber-optic media directly; FOTO pin enables optical transmitter shutdown; RP output provides byte-synchronous read pulse for FIFO interfacing; and BISTEN activates built-in self-test patterns for link-level diagnostics without external test equipment.

Key Specifications

Pinout & Package

Package: 28-pin Plastic Leaded Chip Carrier (PLCC), 11.43 mm × 11.43 mm body, 1.27 mm pitch, JEDEC MS-026AC compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar SMPTE-259M transmitter applications.

Compared with LMH0303SQ/NOPB and GS2971-IBE3, CY7B9234-270JXCT uniquely delivers triple PECL outputs, on-chip BIST, and PLCC-28 packaging for legacy broadcast hardware reuse-making it optimal for cost-sensitive, multi-output SD-SDI systems where design continuity matters.

Availability

CY7B9234-270JXCT is available at Aetrix Electronics and suitable for SDI video routers, professional video recorders, and broadcast editing consoles requiring stable component supply and long-term obsolescence management.

Supply support for CY7B9234-270JXCT 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 U.S.-based semiconductor company specializing in programmable system-on-chip, memory, and interface solutions for industrial, automotive, and communications markets.

CY7B9234 belongs to Cypress's SMPTE HOTLink® chipset family, designed specifically for broadcast video infrastructure to enable robust, low-latency serialization of uncompressed SD-SDI signals across coaxial, twisted-pair, and fiber-optic media.

FAQ

Is CY7B9234-270JXCT compatible with SMPTE-259M-CD and DVB-ASI standards?

Yes. The CY7B9234-270JXCT is explicitly certified SMPTE-259M-CD compliant and supports DVB-ASI protocol via its 8B/10B encoder and 270 Mbps data rate. Its electrical characteristics-including jitter tolerance, rise/fall times, and differential output swing-meet both standards' physical layer requirements as verified in Cypress Document #38-02014 Rev. *B.

What is the function of the FOTO pin, and how does it affect output behavior?

The FOTO (Fiber-Optic Transmitter Off) pin is an active-high TTL input that forces OUTA± and OUTB± to logical zero (OUT+ = LOW, OUT− = HIGH), disabling optical transmitter modules. OUTC± remains active regardless of FOTO state, enabling use as a loopback test signal. This allows safe optical module hot-swap and system-level power gating without interrupting diagnostics.

Can CY7B9234-270JXCT operate without external PLL components?

Yes. The device integrates a fully self-contained PLL clock synthesizer referenced to the 27 MHz CKW input. No external VCOs, loop filters, or crystal oscillators are required. The internal PLL multiplies CKW by 10 to generate the precise 270 MHz serial bit clock, reducing bill-of-materials cost and layout complexity in broadcast video hardware.

Does CY7B9234-270JXCT support BIST with a CY7B9334 receiver?

Yes. When BISTEN is asserted low and ENA/ENN are held high, CY7B9234-270JXCT transmits a repeating test pattern. Paired with CY7B9334, this enables full-link validation including transmitter, physical medium, and receiver functionality-verified by RVS output and recovered data integrity-without external test equipment or software intervention.