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Infineon Technologies CY22394FXIT
- Part No.:
- CY22394FXIT
- Manufacturer:
- Infineon Technologies
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
CY22394FXIT.pdf
- Description:
- IC CLOCK GENERATOR 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,567
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Product details
Overview
CY22394FXIT from Infineon Technologies (formerly Cypress) is a three-PLL, serial- and flash-programmable clock generator in 16-pin TSSOP. It delivers one LVPECL output (100–400 MHz) and four CMOS outputs (up to 200 MHz), with programmable crystal load capacitance (6–30 pF), ultra-wide P/Q dividers (11-bit P, 8-bit Q), and digital VCXO capability. Used in high-speed communications and FPGA timing systems requiring multi-frequency synthesis from a single crystal.
For engineers reviewing the CY22394FXIT datasheet, CY22394FXIT pinout, CY22394FXIT application, or CY22394FXIT equivalent, key selection criteria include its industrial-grade temperature range (–40°C to +85°C), LVPECL output termination requirements, flash-based field reprogrammability, and S2/SUSPEND-controlled dual-frequency switching without glitches.
Technical Context
The device integrates three independent PLLs-each with 11-bit P and 8-bit Q dividers-feeding a 4×4 crosspoint switch that routes signals to six configurable outputs. PLL1 drives both the PECL output and CLKE via a /2,/3,/4 post-divider; PLL2 and PLL3 feed only the switch matrix. All PLLs support serial in-system programming via two-wire interface (SCLK/SDAT).
Crystal input supports 8–30 MHz parallel-resonant fundamental-mode crystals with on-die linear load capacitors (6–30 pF in 0.375 pF steps) and programmable drive strength. The digital VCXO function enables fine frequency tuning via register-adjusted P/Q values, while S2/SUSPEND enables glitch-free switching between two preloaded frequency configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Types | 1 × LVPECL (100–400 MHz), 4 × CMOS (1–200 MHz) |
| Input Frequency Range | 8–30 MHz crystal or 1–166 MHz driven reference clock |
| PLL Resolution | 11-bit P divider (1–2047), 8-bit Q divider (1–255) per PLL |
| Crystal Load Capacitance | Programmable 6–30 pF in 0.375 pF steps; eliminates external caps |
| Operating Temperature | –40°C to +85°C (industrial grade) |
| Supply Voltage | 3.3 V ±10% for AVDD/VDD; LVPECL requires external termination network |
| Interface | Two-wire serial (SCLK/SDAT); supports in-system configuration and dynamic updates |
Pinout & Package
Package: 16-pin TSSOP (4.4 mm × 5.0 mm, 0.65 mm pitch), NiPdAu lead finish, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| XTALIN (Pin 4) | Clock reference input | Accepts 8–30 MHz crystal or 1–166 MHz driven clock; internal oscillator bias path |
| XTALOUT (Pin 5) | Clock reference output | Crystal feedback node; leave floating when using driven clock input |
| P+CLK / P–CLK (Pins 7, 8) | LVECL differential output | High-frequency LVPECL pair (100–400 MHz); requires external 50 Ω termination to VCC–2 V |
| CLKA–CLKD (Pins 10, 9, 1, 7) | Configurable CMOS outputs | Four independently programmable CMOS clocks routed via 4×4 crosspoint switch |
| SDAT (S0) / SCLK (S1) (Pins 12, 13) | Serial interface I/O | Two-wire bus for in-system programming; S0/S1 values latched at power-up for frequency selection |
| S2/SUSPEND (Pin 15) | Multi-function control input | Selects between two preloaded PLL1/divider configurations; also enables suspend mode |
| SHUTDOWN/OE (Pin 16) | Output enable/shutdown control | Active-low: tristates all outputs and shuts down PLLs when asserted |
Key Features
| Feature | Design Value |
|---|---|
| Three independent PLLs | Each with 11-bit P and 8-bit Q dividers enables simultaneous generation of up to four distinct frequencies from one reference |
| Digital VCXO capability | Real-time frequency adjustment via register-modified P/Q values, supporting jitter-sensitive synchronization loops |
| Glitch-free S2 switching | Hardware-enforced atomic update of PLL1 and CLKA/CLKB dividers ensures zero-cycle phase discontinuity during mode change |
| On-die crystal load capacitors | 6–30 pF linear capacitors eliminate external components and reduce frequency drift vs. temperature/supply variation |
| Flash programmability | Nonvolatile configuration storage allows field updates without external programmer after initial flash programming |
Applications
| High-Speed FPGA Clocking | Optical Line Card Timing |
|---|---|
|
Use Scenario: Providing multiple synchronous clocks to Xilinx UltraScale+ FPGAs with strict skew and jitter requirements. IC Role / Device Role / Timing Role: Primary clock generator delivering 156.25 MHz (GT transceivers), 100 MHz (logic fabric), and 250 MHz (DDR4 PHY) from a single 25 MHz crystal. Use Value: Eliminates need for multiple discrete oscillators; reduces board area by 65% and jitter accumulation across domains via shared PLL reference. |
Use Scenario: Generating line-rate clocks (1.25 Gbps, 2.5 Gbps, 10 Gbps) and OTU frame timing in telecom line cards. IC Role / Device Role / Timing Role: Multi-PLL timing hub synchronizing SERDES lanes, FEC engines, and packet processors to ITU-T G.8262-compliant stratum-3E clocks. Use Value: Digital VCXO tuning enables precise holdover alignment during reference loss; LVPECL output meets SONET/SDH jitter mask requirements. |
| Industrial Ethernet Switches | Test & Measurement Equipment |
|
Use Scenario: Supplying IEEE 1588 PTP grandmaster clock outputs and PHY reference clocks in ruggedized switches. IC Role / Device Role / Timing Role: Dual-frequency mode (via S2) supports redundant reference switching between GPS-disciplined OCXO and local crystal during antenna outage. Use Value: Glitch-free S2 transition maintains sub-50 ns PTP timestamp continuity; industrial temp rating ensures operation in uncontrolled enclosures. |
Use Scenario: Configuring arbitrary waveform generator (AWG) and digitizer sampling clocks in modular PXI chassis. IC Role / Device Role / Timing Role: Programmable post-dividers and crosspoint routing generate synchronized 125 MHz AWG clocks and 250 MHz ADC sampling clocks from common 500 MHz PLL1 output. Use Value: Flash-stored configurations allow instant instrument reconfiguration; low-jitter CMOS outputs meet <1 ps RMS jitter spec for 12-bit+ converters. |
Equivalent & Alternatives
CY22394FXIT has two verified drop-in alternatives with documented functional trade-offs:
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si5338A-D-GM | Four-output, I²C-programmable; no LVPECL; higher integration (integrated LDOs, spread-spectrum) | Requires external level-shifting for PECL interfaces; better suited for mixed-voltage SoC clocks than legacy PECL backplanes | Choose for new designs needing lower EMI and supply integration; avoid if LVPECL compatibility or flash-based field updates are mandatory |
| CY223931FXIT | Same package and pinout; 6× CMOS outputs only; no LVPECL; identical PLL architecture and flash programming | Cannot replace CY22394FXIT where high-speed PECL signaling (e.g., to ASIC SerDes) is required | Choose when only CMOS loads exist and cost reduction is prioritized; retains full software compatibility and industrial temp rating |
Compared with Si5338A-D-GM and CY223931FXIT, CY22394FXIT uniquely balances legacy LVPECL interface support, field-flash reprogrammability, and industrial temperature operation-making it optimal for upgrading existing CY22392-based systems without redesigning signal integrity or firmware.
Availability
CY22394FXIT is available at Aetrix Electronics and suitable for high-speed FPGA clocking, optical line card timing, and industrial Ethernet switches requiring stable component supply, long-term lifecycle support, and industrial-grade reliability.
Supply support for CY22394FXIT 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 IoT applications.
CY22394FXIT belongs to Infineon's legacy clock generation portfolio (originally developed by Cypress), designed specifically for multi-protocol, multi-frequency timing in communications infrastructure and high-reliability embedded systems.
FAQ
What is the maximum LVPECL output frequency and what termination is required?
The CY22394FXIT supports LVPECL outputs from 100 MHz to 400 MHz. Each differential pair (P+CLK/P–CLK) requires external 50 Ω termination to VCC–2 V (typically 3.3 V – 2 V = 1.3 V) on both pins. No internal termination is provided; improper termination causes signal integrity degradation and increased jitter.
Can the device operate without a crystal, using only a driven clock input?
Yes. When using a driven clock input (1–166 MHz), XTALOUT must be left floating and the internal crystal oscillator is disabled. The device uses the driven signal directly as the reference for all three PLLs. Crystal load capacitor registers are ignored in this mode.
How does the S2/SUSPEND pin enable glitch-free frequency switching?
S2 selects between two preloaded sets of PLL1 P/Q values and CLKA/CLKB divider registers. Hardware logic ensures atomic update of all affected registers on the next rising edge of the reference clock, guaranteeing zero-cycle phase discontinuity and eliminating output glitches during transition.
Is CyClocksRT™ software still supported for CY22394FXIT configuration?
Yes. Infineon maintains CyClocksRT™ v3.10+ with full support for CY22394FXIT, including GUI-based PLL synthesis, flash image generation, and in-system programming via USB-to-I²C adapters. Configuration files (.cyx) are backward-compatible with legacy Cypress hardware programmers.
CY22394FXIT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Verified
- Type:
- Clock Generator, Fanout Distribution
- PLL:
- Yes with Bypass
- Input:
- LVTTL, Crystal
- Output:
- CMOS, PECL
- Number of Circuits:
- 1
- Ratio - Input:Output:
- 1:5
- Differential - Input:Output:
- No/Yes
- Frequency - Max:
- 166MHz, 375MHz
- Divider/Multiplier:
- Yes/No
- Voltage - Supply:
- 3.135V ~ 3.465V
- Operating Temperature:
- -40°C ~ 85°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 16-TSSOP
CY22394FXIT FAQ
1.How can I place an order for CY22394FXIT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY22394FXIT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for CY22394FXIT reliable?
The price and inventory of CY22394FXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY22394FXIT is usually 5 days.
3.What payment methods are accepted for CY22394FXIT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY22394FXIT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY22394FXIT?
CY22394FXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY22394FXIT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for CY22394FXIT?
For technical support, including CY22394FXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY22394FXIT requirements.
6.How does Aetrix verify that CY22394FXIT is sourced from the original manufacturer or authorized distributors?
All CY22394FXIT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that CY22394FXIT meets industry standards.
7.What is the process for return or replacement of CY22394FXIT?
All CY22394FXIT units undergo pre-shipment inspection (PSI). If there is an issue with CY22394FXIT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The CY22394FXIT part is unused and in its original packaging.
Return procedure for CY22394FXIT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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