Infineon Technologies CY22393FXA

Overview

CY22393FXA from Cypress Semiconductor is an AEC-Q100-qualified automotive three-PLL serial- and flash-programmable clock generator in 16-pin TSSOP. It delivers up to four independent output frequencies (CLKA–CLKD, CLKE) with ultra-wide programmability: 8-bit Q, 11-bit P, and 7-bit post-dividers per PLL; supports crystal load capacitance tuning from 6 pF to 30 pF; operates at 3.3 V; and enables glitch-free frequency switching via S0/S1/S2 inputs for infotainment timing control.

For engineers reviewing the CY22393FXA datasheet, CY22393FXA pinout, CY22393FXA application, or CY22393FXA equivalent, key selection criteria include its triple-PLL architecture, field-programmable flash memory, digital VCXO capability, automotive-grade temperature range (–40°C to +125°C), and support for dynamic reconfiguration via two-wire serial interface.

Technical Context

The CY22393FXA integrates three fully independent PLLs-each with 8-bit Q and 11-bit P dividers-feeding a 4×4 crosspoint switch that routes reference, PLL1, PLL2, or PLL3 to any of five configurable outputs (CLKA–CLKD, CLKE). CLKE is fixed to /2, /3, or /4 division from PLL1 only, while CLKA–CLKD each use 7-bit post-dividers with dual-register selection for S0/S1/S2-controlled frequency tables.

It implements on-die linear crystal load capacitors (6–30 pF in 0.375-pF steps), programmable crystal drive strength, and digital VCXO functionality via serial interface-enabling ±150 ppm reference pull range for specialized crystals. All PLLs derive from a single crystal or driven reference input (up to 166 MHz).

Key Specifications

Pinout & Package

Package: 16-pin TSSOP (4.4 mm × 5.0 mm, 0.65 mm pitch), lead-free and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with Si5351A-B-GM and ICS853S01I, the CY22393FXA uniquely combines flash-programmable triple-PLL architecture, AEC-Q100 Grade E qualification, hardware-based S0/S1/S2 frequency switching, and digital VCXO-all in a 16-pin TSSOP package-making it the only option for dynamically reconfigurable, safety-critical automotive timing systems.

Availability

CY22393FXA is available at Aetrix Electronics and suitable for ADAS camera modules, automotive infotainment head-units, Ethernet PHY synchronization circuits, and instrument cluster microcontroller clocking requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for CY22393FXA 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) designs high-performance mixed-signal ICs for automotive, industrial, and IoT applications, with emphasis on reliability, integration, and programmability.

The CY22393FXA belongs to Cypress's automotive clock generator product line, engineered specifically to replace multiple discrete oscillators and simplify timing architecture in AEC-Q100-compliant electronic control units.

FAQ

What is the maximum input frequency supported on XTALIN when used as a driven clock?

The CY22393FXA accepts driven clock inputs up to 166 MHz on XTALIN. When using a driven source, XTALOUT must be left floating to bypass the internal crystal oscillator circuitry. This mode disables crystal drive strength and load capacitance programming but retains full PLL and output divider functionality.

How does the digital VCXO function affect all output frequencies?

Digital VCXO adjusts the crystal load capacitance to shift the reference frequency, which directly scales all PLL-derived outputs proportionally. For example, a +100 ppm pull on the reference results in +100 ppm shifts on CLKA, CLKB, CLKC, CLKD, and CLKE-since all are derived from the same reference source through PLL multiplication and division.

Can CLKA and CLKB operate with different divider values simultaneously?

No. CLKA and CLKB share a single 7-bit divider register control and must both be set to either register 0 or register 1. Their divider values are synchronized; independent divider programming is not supported. This design enables deterministic, glitch-free switching between two preloaded frequency sets using S0/S1/S2 inputs.

What is the purpose of the AVDD pin, and how should it be decoupled?

AVDD supplies the analog sections-including the crystal oscillator, PLL charge pumps, and bias circuits-and must be separated from digital VDD. It requires a dedicated 100 nF ceramic capacitor placed within 5 mm of Pin 14 and connected to AGND. Mixing AVDD and VDD decoupling compromises jitter performance and may cause oscillator start-up failure at temperature extremes.