Infineon Technologies CY7B993V-2AXCT

Overview

CY7B993V-2AXCT from Infineon Technologies (formerly Cypress) is a high-speed multi-phase PLL clock buffer with 18 LVTTL outputs, 12 MHz–100 MHz input/output operation, <50 ps typical cycle-to-cycle jitter, and zero input-to-output delay. It delivers matched-pair output skew <200 ps in a 100-pin TQFP package and is used in high-performance computing backplanes requiring precise multi-clock domain synchronization.

For engineers reviewing the CY7B993V-2AXCT datasheet, CY7B993V-2AXCT pinout, CY7B993V-2AXCT application, or CY7B993V-2AXCT equivalent, key selection criteria include total timing budget (≤500 ps), phase adjustment resolution (625 ps/1300 ps steps), bank-level disable control, fault-tolerant dual reference inputs, and hot-insertable LVTTL/LVPECL compatibility.

Technical Context

The CY7B993V-2AXCT integrates a fully self-contained PLL with phase-frequency detector, charge pump, loop filter, VCO, and programmable divider. Its feedback architecture supports dynamic reference switching between REFA+/– and REFB+/– without violating system tMIN timing constraints.

Five output banks (four 4-output banks + one 2-output feedback bank) support independent divide-by-1–6,8,10,12 and ±10.4 ns phase adjustments in discrete time units determined by FS pin setting and nominal frequency. INV3 enables complementary or inverted output modes exclusively for Bank 3.

Key Specifications

Pinout & Package

Package: 100-pin Thin Quad Flat Package (TQFP), body size 14 mm × 14 mm, lead pitch 0.5 mm, exposed thermal pad (GND-connected).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ICS853S01I and Si53320-B-GM, the CY7B993V-2AXCT uniquely combines 18 LVTTL outputs, hardware-programmable phase/delay per bank, dual fault-tolerant references, and zero-delay architecture-making it optimal for high-reliability, multi-ASIC timing systems where deterministic deskew and hot-swap resilience are mandatory.

Availability

CY7B993V-2AXCT is available at Aetrix Electronics and suitable for server backplane clocking, PCIe Gen3/Gen4 root complex timing, and telecom line card synchronization requiring stable component supply, long-term lifecycle assurance, and full traceability.

Supply support for CY7B993V-2AXCT 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 acquired Cypress Semiconductor in 2020 and now owns and supports the RoboClock® product family, delivering high-performance timing solutions for computing, communications, and industrial markets.

The CY7B993V belongs to Infineon's RoboClock® PLL clock buffer product line, engineered specifically for deterministic, low-jitter, multi-phase clock distribution in high-speed digital systems with stringent timing budgets.

FAQ

What is the maximum output frequency supported by CY7B993V-2AXCT?

The CY7B993V-2AXCT supports input and output frequencies from 12 MHz to 100 MHz. Its nominal operational range is set by the FS pin: LOW (12–26 MHz), MID (24–52 MHz), or HIGH (48–100 MHz). Outputs maintain specified jitter and skew across this full range under commercial temperature conditions.

How does the LOCK pin behave during power-up and reference switching?

The LOCK pin goes LOW during power-up and remains LOW until the PLL achieves stable phase/frequency lock to the selected reference input. During dynamic reference switching (e.g., REFSEL toggle), LOCK pulses LOW briefly then returns HIGH once reacquisition completes-typically within 100 µs-without violating system tMIN timing constraints.

Can CY7B993V-2AXCT accept LVPECL inputs directly?

Yes. The REFA+/–, REFB+/–, FBKA+/–, and FBKB+/– pins support true LVPECL differential signaling. No external termination or level-shifting components are required. For single-ended LVTTL use, the complementary pin must be left open (internally biased to 1.5 V).

What is the function of the INV3 pin, and which outputs does it affect?

INV3 controls inversion behavior exclusively for Bank 3 outputs (3QA0, 3QA1, 3QB0, 3QB1). When LOW: outputs become complementary pairs (e.g., 3QA0+/3QA1–). When HIGH: all four outputs invert. When MID (open): all outputs remain non-inverted. This enables flexible signal polarity matching for differential receivers or bus drivers.