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Infineon Technologies CY22801KFXIT
- Part No.:
- CY22801KFXIT
- Manufacturer:
- Infineon Technologies
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
CY22801KFXIT.pdf
- Description:
- IC FANOUT DIST 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,772
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Product details
Overview
CY22801KFXIT from Cypress Semiconductor is a flash-programmable universal clock generator with integrated PLL, supporting up to three LVCMOS clock outputs (CLKA, CLKB, CLKC) derived from crystal (8–30 MHz) or external clock (1–133 MHz) input. It delivers up to 200 MHz output (commercial grade), features spread spectrum (±0.25% to ±2.5%), VCXO tuning, and I²C-based field programming via CyClocksRT™ software for rapid prototyping in consumer and communications systems.
For engineers reviewing the CY22801KFXIT datasheet, CY22801KFXIT pinout, CY22801KFXIT application, or CY22801KFXIT equivalent, key selection criteria include its 8-pin SOIC package, multifunction pins (FS0/SDAT/VCXO/OE/PD#), compatibility with JEDEC programming, I²C address 0x69, and trade-offs between VCXO and spread spectrum modes - both mutually exclusive.
Technical Context
The CY22801KFXIT implements a proprietary PLL architecture with programmable P/Q dividers and two post-dividers (DIV1N/DIV2N), enabling precise frequency synthesis from a single reference. Its output routing uses a crosspoint switch matrix that allows each of three outputs to select either the PLL-derived clock, direct reference bypass, or divided reference - all configurable per-output.
It supports dual configuration methods: nonvolatile flash programming (via CY36800 dongle + CyClocksRT™) for production units, and volatile I²C programming (address 0x69) for in-system tuning. VCXO analog control (pin 3) and spread spectrum modulation (31.5 kHz default, ±0.25–2.5%) are hardware-enforced exclusive features, requiring explicit register-level disable before enabling the other.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Frequency Range | Crystal: 8–30 MHz; CLKIN: 1–133 MHz - enables flexible reference sourcing across legacy and high-speed designs. |
| Max Output Frequency | 200 MHz (commercial), 166.6 MHz (industrial) - sets upper limit for synchronous logic timing in FPGA/ASIC interfaces. |
| Output Count & Type | 3 LVCMOS outputs (CLKA, CLKB, CLKC) - supports multi-domain clocking without external fanout buffers. |
| Spread Spectrum | ±0.25% to ±2.5% center-spread, 30.1/31.5/32.9 kHz modulation - reduces EMI peak amplitude at fundamental/harmonic frequencies. |
| VCXO Tuning Range | Analog voltage-controlled pull on crystal reference - enables frequency tracking to external master clocks (e.g., telecom sync). |
| Interface Protocol | I²C-compatible serial interface (default address 0x69) - allows in-system reconfiguration without reflashing. |
| Supply Voltage | 3.3 V ±5% - matches standard logic rail, eliminates need for level-shifting in 3.3 V systems. |
Pinout & Package
Package: 8-pin SOIC (Small Outline Integrated Circuit), JEDEC MS-012AC, body size 3.9 mm × 4.9 mm, 1.27 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (XIN/CLKIN) | Reference input | Accepts either crystal (8–30 MHz) or external clock (1–133 MHz); determines base PLL reference frequency. |
| 2 (VDD) | Power supply | 3.3 V supply pin; requires local 0.1 µF decoupling to minimize PLL jitter. |
| 3 (SDAT/FS0/VCXO/OE/PD#) | Multifunction terminal | Configurable as I²C data line, frequency select 0, VCXO analog control, output enable, or power-down - selected via internal register. |
| 4 (VSS) | Ground | Digital ground reference; must be low-impedance connection to reduce switching noise coupling into PLL. |
| 5 (CLKB/FS1/SCLK) | Output / control / interface | Primary clock output B; also serves as I²C clock (SCLK) or frequency select 1 - not simultaneously active in all modes. |
| 6 (CLKA) | Dedicated output | Independent LVCMOS clock output A; no alternate functions - simplifies routing for critical timing paths. |
| 7 (CLKC/FS2) | Output / control | Third clock output C; doubles as frequency select 2 - enables dynamic clock selection without external logic. |
| 8 (XOUT) | Crystal output | Drives external crystal; left floating when using external CLKIN - prevents signal contention. |
Key Features
| Feature | Design Value |
|---|---|
| Field-programmable flash memory | Enables one-time nonvolatile configuration (JEDEC file) for production units - eliminates dependency on host processor at boot. |
| Programmable crystal oscillator gain | 8-bit register-controlled gain adjustment - ensures reliable start-up and stable oscillation across crystal vendors and tolerances. |
| Integrated load capacitors | On-die parallel-plate capacitors replace external CL components - reduces BOM count and mitigates temperature-induced frequency drift. |
| Crosspoint switch matrix | Routes REF, PLL output, or divided clocks independently to each of three outputs - enables mixed-frequency domains from single device. |
| Weak internal pull-ups | ~100 kΩ on all multifunction pins - ensures defined logic state during power-up or I²C idle, preventing floating inputs. |
Applications
| Consumer Audio Systems | Networking Switch ASICs |
|---|---|
Use Scenario: Synchronizing audio CODECs, DACs, and DSPs in home theater receivers with variable sample rates (44.1 kHz, 48 kHz, 96 kHz). IC Role / Device Role / Timing Role: Universal clock generator providing three independent, jitter-optimized clocks - one for master audio clock, one for SPDIF transmitter, one for USB audio interface. Use Value: Eliminates multiple discrete oscillators; spread spectrum reduces EMI radiated from HDMI/USB traces near sensitive analog audio sections. | Use Scenario: Clocking multi-port Ethernet switch ASICs requiring separate clocks for MAC, PHY, and management interfaces. IC Role / Device Role / Timing Role: Centralized clock source generating 125 MHz (GMII), 25 MHz (management), and 156.25 MHz (SerDes reference) from single 25 MHz crystal. Use Value: Reduces board space and power vs. three discrete oscillators; I²C reprogramming supports firmware-driven clock scaling during link training. |
| Industrial PLC Controllers | Set-Top Box SoCs |
Use Scenario: Providing deterministic timing for real-time I/O scanning, motion control loops, and HMI display refresh in programmable logic controllers. IC Role / Device Role / Timing Role: High-accuracy clock generator delivering 64 MHz CPU clock, 16 MHz peripheral bus clock, and 100 MHz EtherCAT PHY clock - all phase-aligned to common reference. Use Value: Enables sub-microsecond jitter stability required for synchronized distributed I/O; industrial-grade temp range (–40°C to +85°C) ensures operation in harsh enclosures. | Use Scenario: Clocking video decoder, MPEG transport stream demux, and HDMI transmitter in digital cable boxes with strict FCC Class B EMI limits. IC Role / Device Role / Timing Role: Spread spectrum clock generator producing 27 MHz (MPEG TS), 297 MHz (HDMI TMDS), and 108 MHz (video decode engine) clocks. Use Value: Meets CISPR 22 radiated emissions requirements without added shielding or ferrites - accelerating EMC certification cycle. |
Equivalent & Alternatives
Cypress CY22801KFXIT has two verified drop-in alternatives with documented functional overlap and known trade-offs in configuration flexibility and feature support.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT 5V41066APFG | Fixed-function 3-output clock generator; no field-programmable flash or I²C interface - configured at factory only. | Lacks VCXO and spread spectrum; limited to pre-defined frequency combinations - unsuitable for prototyping or multi-standard devices. | Select when volume production requires zero configuration overhead and frequency set is static across entire product lifecycle. |
| ON Semi NB3N3020BDR2G | LVCMOS 3-output generator with I²C interface but no flash memory - volatile configuration only; no VCXO support. | Supports spread spectrum but lacks analog VCXO tuning; lower max output (166 MHz) and narrower input range (1–100 MHz). | Select when in-system reprogramming is mandatory but VCXO tracking is unnecessary, and cost sensitivity outweighs nonvolatile storage benefit. |
Compared with IDT 5V41066APFG and ON Semi NB3N3020BDR2G, CY22801KFXIT uniquely combines nonvolatile flash programming, analog VCXO control, and spread spectrum - making it optimal for applications requiring field-upgradable timing, frequency tracking, and EMI reduction in a single 8-pin SOIC package.
Availability
CY22801KFXIT is available at Aetrix Electronics and suitable for consumer audio systems, networking switch ASICs, and industrial PLC controllers requiring stable component supply, long-term manufacturability, and consistent electrical performance across commercial and industrial temperature grades.
Supply support for CY22801KFXIT 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) is a fabless semiconductor company specializing in programmable system-on-chip (PSoC), memory, and timing solutions for embedded and industrial markets.
CY22801 belongs to Cypress's Universal Programmable Clock Generator (UPCG) product line, designed specifically for flexible, low-jitter clock synthesis in cost-sensitive, space-constrained consumer and communications equipment where field configurability and EMI compliance are critical.
FAQ
What is the default state of CY22801KFXIT after power-up?
At power-on, unprogrammed CY22801KFXIT defaults to all outputs tri-stated, crystal oscillator active, and all registers set to zero. No clocks are generated until programmed via I²C or flash. Factory-shipped units are blank; distributors typically pre-program with customer-specific JEDEC files using CyClocksRT™ and CY36800 dongle.
Can VCXO and spread spectrum be used simultaneously on CY22801KFXIT?
No. VCXO and spread spectrum are mutually exclusive features in CY22801KFXIT. Enabling one automatically disables the other at the hardware level. This is enforced by internal logic - attempting to configure both results in undefined behavior or failure to lock. Designers must choose based on application priority: frequency tracking (VCXO) or EMI reduction (SSCG).
How does the multifunction pin assignment work on pin 3 (SDAT/FS0/VCXO/OE/PD#)?
Pin 3 supports five distinct functions, but only one is active per configuration - selected by writing to specific bits in the device's function control register (0x01). For example, bit[7:6] selects OE/PD#, bit[5:4] selects FS0, bit[3:2] selects VCXO, and bit[1:0] selects SDAT. The CyClocksRT™ software auto-generates correct register values based on user-selected pin mapping in the GUI.
What is the role of the internal load capacitors in CY22801KFXIT's crystal oscillator circuit?
The CY22801KFXIT integrates on-die parallel-plate load capacitors (programmable via 8-bit register) to replace external CL components. This eliminates PCB layout sensitivity to stray capacitance, reduces BOM cost, and improves frequency stability over temperature and voltage - especially critical for high-precision consumer timing applications where crystal tolerance is tight.
CY22801KFXIT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Fanout Distribution, Multiplexer, Spread Spectrum Clock Generator
- PLL:
- Yes
- Input:
- Clock, Crystal
- Output:
- LVCMOS
- Number of Circuits:
- 1
- Ratio - Input:Output:
- 1:3
- Differential - Input:Output:
- No/No
- Frequency - Max:
- 166.6MHz
- Divider/Multiplier:
- Yes/No
- Voltage - Supply:
- 3.14V ~ 3.47V
- Operating Temperature:
- -40°C ~ 85°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-SOIC
CY22801KFXIT FAQ
1.How can I place an order for CY22801KFXIT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY22801KFXIT 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 CY22801KFXIT reliable?
The price and inventory of CY22801KFXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY22801KFXIT is usually 5 days.
3.What payment methods are accepted for CY22801KFXIT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY22801KFXIT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY22801KFXIT?
CY22801KFXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY22801KFXIT 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 CY22801KFXIT?
For technical support, including CY22801KFXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY22801KFXIT requirements.
6.How does Aetrix verify that CY22801KFXIT is sourced from the original manufacturer or authorized distributors?
All CY22801KFXIT 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 CY22801KFXIT meets industry standards.
7.What is the process for return or replacement of CY22801KFXIT?
All CY22801KFXIT units undergo pre-shipment inspection (PSI). If there is an issue with CY22801KFXIT, 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 CY22801KFXIT part is unused and in its original packaging.
Return procedure for CY22801KFXIT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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