Infineon Technologies CY22393FXET

Overview

CY22393FXET from Cypress Semiconductor is an AEC-Q100 qualified automotive-grade three-PLL serial- and flash-programmable clock generator in a 16-pin TSSOP package, operating at 3.3 V with ultra-wide divide counters (11-bit P, 8-bit Q, 7-bit post-divide), digital VCXO capability, and configurable crystal drive strength for ±150 ppm pull range.

For engineers reviewing the CY22393FXET datasheet, CY22393FXET pinout, CY22393FXET application, or CY22393FXET equivalent, key selection considerations include its triple-PLL architecture supporting up to four independent output frequencies, glitch-free frequency switching via S0/S1/S2 inputs, low-jitter high-accuracy outputs, and field-programmability via two-wire serial interface and external programmer.

Technical Context

The CY22393FXET integrates three fully programmable PLLs-each with independent 11-bit P and 8-bit Q dividers-feeding a 4×4 crosspoint switch that routes reference, PLL1, PLL2, or PLL3 to any of six output pins. CLKE is derived directly from PLL1 with /2, /3, or /4 synchronous post-division.

It supports dynamic reconfiguration via two-wire serial interface (SDAT/SCLK), enables digital VCXO operation through on-die crystal load capacitance tuning (6–30 pF in 0.375 pF steps), and implements power management via SHUTDOWN/OE (full chip shutdown) and S2/SUSPEND (selective PLL/output disable).

Key Specifications

Pinout & Package

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

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 CY22393FXET uniquely combines flash-based configuration persistence, AEC-Q100 Grade A qualification, digital VCXO, and selective suspend-making it the only option for production automotive systems requiring field-updatable, temperature-robust, multi-domain clock synthesis.

Availability

CY22393FXET is available at Aetrix Electronics and suitable for automotive infotainment, ADAS sensor fusion, and telematics control units requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for CY22393FXET 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 system-level power efficiency.

The CY22393FXET belongs to Cypress's automotive clock generator product line, engineered specifically for AEC-Q100-compliant timing solutions in safety-critical vehicle subsystems requiring multi-frequency flexibility and field programmability.

FAQ

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

The CY22393FXET accepts driven clock inputs up to 166 MHz on XTALIN when XTALOUT is left floating and the internal crystal oscillator is bypassed. This mode disables on-die load capacitance and allows direct injection of clean, low-jitter reference signals from external oscillators or clock buffers.

How does the S2/SUSPEND pin function in suspend mode versus frequency-select mode?

In frequency-select mode, S2 is latched at power-up as the third index into an 8-row PLL1/CLKA/CLKB configuration table. In suspend mode, it is configured via serial interface to selectively disable individual PLLs or outputs-shutting off associated analog/digital circuitry while preserving configuration state for fast wake-up.

Can CLKA and CLKB operate at different frequencies simultaneously?

No-CLKA and CLKB share a single 7-bit divider register pair (register 0 and register 1), and both outputs must be set to the same register index (0 or 1). Their frequencies are therefore identical when sourced from the same crosspoint switch output, though they may be routed from different sources via software configuration.

What is the purpose of the Jitter Optimization Control feature?

Jitter Optimization Control allows selecting the negative phase of a PLL output for one of CLKA–CLKD to prevent edge alignment between multiple outputs driven from the same PLL-reducing deterministic jitter caused by simultaneous switching noise coupling into shared power/ground paths.