Infineon Technologies CY7B994V-2BBIT

Overview

CY7B994V-2BBIT from Infineon Technologies (formerly Cypress) is a high-speed multi-phase PLL clock buffer with 18 LVTTL outputs, operating from 24 MHz to 200 MHz input/output frequency range, ±10.4 ns programmable phase adjustment in 625 ps/1300 ps steps, and guaranteed ≤500 ps total timing budget across voltage, temperature, and process variations - deployed in high-performance server memory subsystems for precise DDR clock distribution.

For engineers reviewing the CY7B994V-2BBIT datasheet, CY7B994V-2BBIT pinout, CY7B994V-2BBIT application, or CY7B994V-2BBIT equivalent, key selection criteria include its 100-pin BGA package, fault-tolerant dual differential reference inputs (LVTTL/LVPECL), individual bank disable control, zero input-to-output delay architecture, and industrial-temperature-rated 6-output capability at 200 MHz.

Technical Context

The CY7B994V integrates a fully self-contained PLL with VCO, phase-frequency detector, charge pump, and loop filter - enabling jitter reduction without external components. Its feedback path supports selectable FBKA/FBKB differential inputs, while reference selection (REFA/REFB) and dynamic switchover are implemented via dedicated LVTTL control pins with internal pull-downs.

Phase and frequency control is implemented through five independent output banks: four configurable 4-output banks (Banks 1–4) supporting divide-by-1–12 and fine phase shifts, plus a dedicated 2-output feedback bank (QFA0/QFA1) with separate divider/phase select logic - all synchronized to a single VCO whose nominal frequency (fNOM) is set by the 3-level FS pin per Table 1 (24–200 MHz range).

Key Specifications

Pinout & Package

Package: 100-pin Fine-Pitch Ball Grid Array (FBGA), 11 mm × 11 mm, 0.8 mm pitch, RoHS-compliant - optimized for high-density PCB layouts with controlled impedance routing and thermal dissipation in compact server modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT8T49N242 and Si5332A-D-GM, the CY7B994V-2BBIT delivers superior LVTTL drive strength (50 Ω terminated), zero-delay architecture, and hardware-controlled reference switchover - making it optimal for cost-sensitive, high-reliability embedded clock distribution where deterministic skew matters more than ultra-low jitter.

Availability

CY7B994V-2BBIT is available at Aetrix Electronics and suitable for server memory subsystems, high-speed ASIC clock trees, and telecom line card synchronization requiring stable component supply, long-term lifecycle support, and industrial-temperature operation.

Supply support for CY7B994V-2BBIT 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

Infineon Technologies is a global semiconductor leader headquartered in Munich, Germany, specializing in power management, sensing, connectivity, and security solutions for automotive, industrial, and communications markets.

The RoboClock® product line - including CY7B994V - was originally developed by Cypress and continues under Infineon to address high-speed, multi-phase clock distribution in performance-critical computing and networking systems with deterministic timing and robust fault tolerance.

FAQ

What is the function of the INV3 pin on CY7B994V-2BBIT?

The INV3 pin controls inversion behavior exclusively for Bank 3 outputs. When LOW, it configures 3QA0/3QA1 and 3QB0/3QB1 as complementary pairs (e.g., QA0+, QA1–). When HIGH, all four outputs invert simultaneously. At MID (open), all outputs remain non-inverting - enabling flexible differential signaling or polarity correction without external logic.

How does the FS pin affect CY7B994V-2BBIT's timing resolution?

The 3-level FS pin sets the VCO's nominal frequency (fNOM) and determines the time unit (tU) for phase adjustment. For CY7B994V, FS=HIGH yields fNOM=96–200 MHz and tU=125 ps (N=8), enabling 625 ps phase steps via 5×tU increments - directly linking frequency range to achievable deskew precision.

Can CY7B994V-2BBIT operate with only single-ended reference inputs?

Yes. REFA+/REFA– and REFB+/REFB– support single-ended LVTTL operation: connect the active signal to the '+' pin (e.g., REFA+) and leave the '–' pin (e.g., REFA–) unconnected - internal biasing pulls it to 1.5 V. This configuration is explicitly validated in the datasheet and maintains full TTB specification.

What does the LOCK pin indicate, and how is it used in system design?

The LOCK pin is an open-drain LVTTL output that asserts HIGH only when the internal PLL has achieved and sustained phase/frequency lock to the selected reference input. It is used in system firmware to gate memory initialization sequences and trigger diagnostic alerts if lock is lost - ensuring clock stability before critical operations commence.