Infineon Technologies CY7B9930V-5AXCT

Overview

CY7B9930V-5AXCT from Cypress Semiconductor is a high-speed multi-frequency PLL clock buffer with 10 LVTTL outputs, 12–100 MHz input/output operation, matched pair output skew < 200 ps, zero input-to-output delay, and integrated lock indicator. It serves as a system-level clock distribution IC in high-performance computing and communication timing architectures requiring precise skew control and hot-insertion-capable reference switching.

For engineers reviewing the CY7B9930V-5AXCT datasheet, CY7B9930V-5AXCT pinout, CY7B9930V-5AXCT application, or CY7B9930V-5AXCT equivalent, this device supports dynamic reference selection (REFA/REFB), per-bank output disable (DIS1/DIS2), configurable feedback division (1–12), and factory test mode via OUTPUT_MODE - all critical for clock tree validation, EMI-sensitive board layout, and production testability.

Technical Context

The CY7B9930V-5AXCT integrates a fully self-contained PLL with phase-frequency detector, charge pump, loop filter, VCO, and divide generator - enabling stable multiplication up to 12× the reference frequency while maintaining <100 ps peak-to-peak cycle-to-cycle jitter. Its three-output-bank architecture separates feedback (QFA0/QFA1), Bank 1 (1QA0/1QA1/1QB0/1QB1), and Bank 2 (2QA0/2QA1/2QB0/2QB1) for independent skew management and disable control.

Reference inputs support both single-ended LVTTL (REFA+/REFA– or REFB+/REFB– with complementary pin open or biased) and differential LVPECL modes, selected by REFSEL. The FS[1] pin configures nominal VCO range (12–100 MHz), and FBDS[0:1] selects feedback division ratio (1, 2, 3, 4, 5, 6, 8, 10, or 12), directly determining the locked output frequency relationship to the reference.

Key Specifications

Pinout & Package

44-pin TQFP (Thin Quad Flat Package), 10 mm × 10 mm body, 0.8 mm pitch, lead-free and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed PLL clock buffer applications.

Compared with IDT5V9885BGI and ICS853S01AGI-01LFT, the CY7B9930V-5AXCT uniquely combines integrated PLL multiplication, dual-differential reference support, and per-bank disable - making it optimal for systems requiring field-upgradable clock trees with redundancy and power-aware timing control.

Availability

CY7B9930V-5AXCT is available at Aetrix Electronics and suitable for server memory subsystems, industrial PLC backplanes, and network switch fabric designs requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for CY7B9930V-5AXCT 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 (PSoC), memory, and timing solutions for embedded and industrial applications.

The RoboClock II™ Junior product line delivers cost-optimized, multi-output PLL clock buffers targeting high-reliability computing and communications infrastructure where skew control, reference redundancy, and testability are design-critical.

FAQ

What is the function of the OUTPUT_MODE pin in factory test mode?

When OUTPUT_MODE is driven to MID, the CY7B9930V-5AXCT enters factory test mode: the internal PLL is disconnected, and the selected reference input (REFA or REFB) passes directly to all clock outputs. This allows functional verification without PLL lock dependency. In this mode, DIS2 can reset internal state machines to a deterministic condition after five reference clock edges.

How does the LOCK output indicate PLL status, and what triggers its deassertion?

The LOCK output goes HIGH only after 32 consecutive feedback clock cycles with no phase error exceeding tPD. It deasserts LOW if four or more consecutive cycles exceed that limit, or if the feedback clock disappears - triggering a watchdog timeout based on a divided-down reference. LOCK accuracy depends on continuous activity on the selected REF input.

Can REFA+ and REFA– be used as single-ended LVTTL inputs simultaneously with REFB+ and REFB–?

No - REFSEL selects only one reference pair at a time: LOW activates REFA±, HIGH activates REFB±. Both pairs cannot drive the PLL concurrently. However, the unselected pair remains electrically present and may be used for monitoring or external logic, but it has no effect on PLL operation.

What is the maximum output load the CY7B9930V-5AXCT can drive without external termination?

The device is specified to drive 50 Ω terminated transmission lines directly. Each LVTTL output delivers 30 mA sink current and –30 mA source current at VCC = 3.0 V, supporting point-to-point or short stub topologies. For longer traces or multi-drop loads, external series or parallel termination is required to maintain signal integrity and meet skew specifications.