My Inquiry
My Account
Infineon Technologies CY22381SXI-213T
- Part No.:
- CY22381SXI-213T
- Manufacturer:
- Infineon Technologies
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
CY22381SXI-213T.pdf
- Description:
- IC CLOCK GENERATOR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,987
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
CY22381SXI-213T from Cypress Semiconductor is a three-PLL, flash-programmable clock generator in an 8-pin SOIC package operating at 3.3 V. It delivers up to three independent, low-jitter clock outputs derived from either a crystal (8–30 MHz) or external reference (up to 166 MHz), with ultra-wide programmable dividers (11-bit P, 8-bit Q, 7-bit post-divide) and on-die linear crystal load capacitors (6–30 pF). Used in networking and datacom systems requiring multi-frequency clock synthesis with field reprogrammability.
For engineers reviewing the CY22381SXI-213T datasheet, CY22381SXI-213T pinout, CY22381SXI-213T application, or CY22381SXI-213T equivalent, key selection criteria include its triple-PLL architecture, glitch-free frequency select via FS pin, configurable suspend/shutdown/OE modes, 200 MHz max output frequency (commercial), and CyClocks RT™ software support for configuration validation and jitter optimization.
Technical Context
The CY22381SXI-213T implements three fully independent PLLs-each with an 11-bit feedback divider (P) and 8-bit reference divider (Q)-feeding a 4×3 crosspoint switch that routes any source (REF, PLL1, PLL2, PLL3) to CLKA, CLKB, or CLKC. Each output passes through a 7-bit post-divider with dual-register support for FS-controlled frequency switching.
Its crystal oscillator features programmable drive strength and on-die linear parallel-plate load capacitors (6–30 pF in 0.375 pF steps), eliminating external caps and reducing frequency drift across temperature, supply, and bias. The FS/SUSPEND/OE/SHUTDOWN pin (Pin 8) supports four mutually exclusive functional modes with guaranteed glitch-free transitions during frequency changes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.3 V ±3.5% (3.135–3.465 V); enables compatibility with standard 3.3 V logic domains and reduces level-shifting overhead. |
| Reference Input Range | Crystal: 8–30 MHz; external clock: 1–166 MHz (industrial), 1–150 MHz (commercial); supports both fundamental-mode crystals and high-speed driven sources. |
| Max Output Frequency | 200 MHz (commercial), 166 MHz (industrial); sufficient for PCIe Gen1/2, Gigabit Ethernet PHY clocks, and DDR memory interfaces. |
| Output Jitter (pk-pk) | 200 ps period jitter; measured at VDD/2 under typical configuration; critical for timing-critical SerDes and ADC sampling clocks. |
| Crystal Load Capacitance | Programmable 6–30 pF in 0.375 pF steps; on-die linear capacitors eliminate external components and minimize frequency shift vs. temperature/supply. |
| Power Supply Current | 35 mA (3 outputs @ 50 MHz), 70 mA (3 outputs @ 166 MHz); enables accurate thermal budgeting in dense PCB layouts. |
| Shutdown Current | 5 µA typical; allows deep power-down during system idle states without losing flash configuration. |
Pinout & Package
Package: 8-pin Small Outline Integrated Circuit (SOIC), NiPdAu lead finish (per CY223811 variant designation), RoHS-compliant, body size 4.9 × 3.9 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLKC (Pin 1) | Configurable clock output C | Routed from crosspoint switch + 7-bit post-divider; no FS register duplication; used for fixed-frequency system clocks. |
| GND (Pin 2) | Analog/digital ground reference | Single ground pin shared for all internal blocks; requires low-impedance PCB connection to minimize ground bounce and jitter. |
| XTALIN (Pin 3) | Clock reference input | Accepts either crystal (8–30 MHz) or external CMOS clock (1–166 MHz); duty cycle 40–60% required for external inputs. |
| XTALOUT (Pin 4) | Crytal feedback output | Drives crystal's other terminal; must be left floating when XTALIN is driven by external clock source. |
| CLKB (Pin 5) | Configurable clock output B | Routed from crosspoint switch + 7-bit post-divider with dual FS-selectable registers; supports dynamic frequency switching. |
| CLKA (Pin 6) | Configurable clock output A | Routed from crosspoint switch + 7-bit post-divider with dual FS-selectable registers; synchronized switching with CLKB avoids inter-clock interference. |
| VDD (Pin 7) | 3.3 V power supply | Supplies all internal circuitry including PLLs, dividers, and output drivers; requires local 0.1 µF decoupling per datasheet Figure 2. |
| FS/SUSPEND/OE/SHUTDOWN (Pin 8) | Multi-function control input | Configurable as frequency select (glitch-free dual-frequency mode), suspend (customizable PLL/output shutdown), OE (3-state all outputs), or full shutdown (<5 µA). |
Key Features
| Feature | Design Value |
|---|---|
| Triple independent PLL architecture | Enables simultaneous generation of three unrelated clock frequencies (e.g., 125 MHz, 100 MHz, 25 MHz) from one reference, eliminating multiple discrete oscillators. |
| Flash-based field programmability | Retains configuration through power cycles; supports in-system reprogramming via CyClocks RT™ without hardware modification or soldering. |
| On-die linear crystal load capacitors | 6–30 pF range with 0.375 pF resolution eliminates external capacitors and prevents frequency drift caused by non-linear FET-based loads. |
| Glitch-free frequency select (FS) | Switches between two pre-programmed configurations for PLL1, CLKA, and CLKB with zero-cycle glitches-critical for hot-plug and adaptive rate applications. |
| Configurable power management | Four distinct low-power modes (OE, Suspend, Shutdown, active) allow granular current reduction-from 35 mA down to 5 µA-without losing configuration state. |
Applications
| Networking Switch Fabric Clocking | Gigabit Ethernet PHY Timing |
|---|---|
Use Scenario: Synchronizing packet forwarding engines, MAC layers, and SERDES in Layer 2/3 switches with multiple clock domains. IC Role / Device Role / Timing Role: Generates three independent clocks: 125 MHz for GMII, 25 MHz for management interface, and 100 MHz for CPU bus-each sourced from separate PLLs. Use Value: Eliminates need for three discrete oscillators and simplifies board layout while maintaining <200 ps jitter for deterministic packet latency. | Use Scenario: Providing precise, low-jitter reference clocks to Ethernet PHY ICs (e.g., Broadcom BCM54616) in enterprise routers and base stations. IC Role / Device Role / Timing Role: Delivers 125 MHz RX/TX clock and 25 MHz MDIO clock from same device, with FS pin enabling dynamic reconfiguration during link speed negotiation (10/100/1000BASE-T). Use Value: Reduces BOM count and ensures phase alignment between related clocks, improving EMI margin and signal integrity at 1 Gbps line rates. |
| Data Center Storage Controller Clocking | Industrial PLC Communication Module |
Use Scenario: Clocking SAS/SATA host bus adapters and NVMe controllers where PCIe root complex, storage interface, and management MCU require synchronous but non-harmonic clocks. IC Role / Device Role / Timing Role: Supplies 100 MHz PCIe REFCLK, 50 MHz SATA reference, and 33.333 MHz SPI/I2C controller clock-all derived from single 25 MHz crystal via independent PLL paths. Use Value: Guarantees <200 ps period jitter on PCIe clock to meet PCI-SIG compliance, while sharing crystal resource to reduce cost and board space. | Use Scenario: Timing industrial EtherCAT or PROFINET slave controllers operating in harsh environments with wide temperature (-40°C to +85°C) and variable supply conditions. IC Role / Device Role / Timing Role: Provides 50 MHz EtherCAT sync clock, 10 MHz diagnostics timer, and 1 MHz watchdog reference-each with suspend capability during sleep mode. Use Value: On-die linear load capacitors maintain stable crystal frequency across temperature swings, ensuring deterministic real-time communication timing within ±50 ppm. |
Equivalent & Alternatives
Cypress CY22381SXI-213T has two verified drop-in alternatives with documented functional trade-offs.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT 5V41065APFGI | Two PLLs only; no FS pin; fixed 3.3 V operation; 150 MHz max output; no on-die crystal load caps (requires external 12–22 pF). | Lacks dynamic frequency switching and crystal capacitor integration; suitable only for static, dual-clock applications. | Select when cost sensitivity outweighs configurability needs and crystal matching is tightly controlled. |
| Microchip SY89429LKC | Single PLL + fanout buffer; no flash programming; 3.3 V/2.5 V dual supply; 700 MHz max output; no suspend/shutdown modes. | Designed for high-frequency distribution-not synthesis; no field reprogrammability or low-power control. | Select only for simple clock fanout where synthesis flexibility and power management are unnecessary. |
Compared with IDT 5V41065APFGI and Microchip SY89429LKC, CY22381SXI-213T uniquely combines triple-PLL synthesis, field-flash reprogrammability, integrated crystal load tuning, and four-mode power control-making it the sole choice for compact, adaptive, multi-protocol timing in space-constrained networking and industrial systems.
Availability
CY22381SXI-213T is available at Aetrix Electronics and suitable for networking switch fabric clocking, Gigabit Ethernet PHY timing, and industrial PLC communication modules requiring stable component supply, long-term lifecycle support, and consistent parametric performance across commercial and industrial temperature ranges.
Supply support for CY22381SXI-213T 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 embedded systems, with expertise in programmable logic, memory, and precision timing solutions.
The CY22381 product line targets general-purpose, flash-programmable clock generation for datacom, telecom, and networking equipment-emphasizing field reconfigurability, low jitter, and integration of crystal interface components to reduce system-level BOM and design complexity.
FAQ
What is the maximum crystal frequency supported by CY22381SXI-213T?
The CY22381SXI-213T supports crystals from 8 MHz to 30 MHz, as specified in the "Recommended Crystal Specifications" table (Page 6) and "Operating Conditions" section (Page 5) of datasheet 38-07012 Rev. *L. This range applies to fundamental-mode parallel-resonant crystals with nominal load capacitance of 8–20 pF and ESR ≤50 Ω. External clock inputs up to 166 MHz are also supported, but crystals beyond 30 MHz are not validated or guaranteed.
Can CY22381SXI-213T generate three completely independent output frequencies simultaneously?
Yes. Its three independent PLLs (PLL1, PLL2, PLL3) each have dedicated 11-bit P and 8-bit Q dividers, allowing fully asynchronous frequency synthesis from a single reference. Outputs CLKA, CLKB, and CLKC are routed via a 4×3 crosspoint switch and can be assigned to REF, PLL1, PLL2, or PLL3 independently, with individual 7-bit post-dividers-enabling truly unrelated frequencies such as 125 MHz, 100 MHz, and 25 MHz from one 25 MHz crystal.
Does CY22381SXI-213T require external load capacitors when using a crystal?
No. The device integrates linear on-die parallel-plate crystal load capacitors programmable from 6 pF to 30 pF in 0.375 pF steps-eliminating the need for external capacitors. This is confirmed in the "Crystal Input" section (Page 4) and "Electrical Characteristics" table (Page 5, CXTAL_MIN/MAX). External capacitors are only required if using non-standard crystals outside the recommended 8–20 pF CLNOM range.
How does the FS pin enable glitch-free frequency switching?
The FS pin selects between two pre-programmed configurations stored in flash: one set for PLL1, CLKA, and CLKB dividers. Transitions occur synchronously with internal clock edges and are guaranteed glitch-free per the "General-Purpose Input" section (Page 3). The crosspoint switch and divider logic ensure no intermediate or undefined states-verified in silicon and documented in the "Operation" section (Page 3) and "Switching Characteristics" table (t5 = 150–300 ns three-state timing).
CY22381SXI-213T 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:
- Clock Generator, Fanout Distribution
- PLL:
- Yes with Bypass
- Input:
- LVTTL, Crystal
- Output:
- CMOS
- Number of Circuits:
- 3
- Ratio - Input:Output:
- 1:3
- Differential - Input:Output:
- No/No
- Frequency - Max:
- -
- Divider/Multiplier:
- Yes/No
- Voltage - Supply:
- 3.135V ~ 3.465V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-SOIC
CY22381SXI-213T FAQ
1.How can I place an order for CY22381SXI-213T through Aetrix?
Please submit a Request for Quotation (RFQ) for CY22381SXI-213T 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 CY22381SXI-213T reliable?
The price and inventory of CY22381SXI-213T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY22381SXI-213T is usually 5 days.
3.What payment methods are accepted for CY22381SXI-213T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY22381SXI-213T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY22381SXI-213T?
CY22381SXI-213T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY22381SXI-213T 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 CY22381SXI-213T?
For technical support, including CY22381SXI-213T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY22381SXI-213T requirements.
6.How does Aetrix verify that CY22381SXI-213T is sourced from the original manufacturer or authorized distributors?
All CY22381SXI-213T 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 CY22381SXI-213T meets industry standards.
7.What is the process for return or replacement of CY22381SXI-213T?
All CY22381SXI-213T units undergo pre-shipment inspection (PSI). If there is an issue with CY22381SXI-213T, 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 CY22381SXI-213T part is unused and in its original packaging.
Return procedure for CY22381SXI-213T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY22381SXI-213T Tags
-
CD74HCT4046AM96
Texas Instruments
-
MC14046BDWR2G
onsemi
-
501MILFT
Renesas Electronics Corporation
-
CD74HC7046AM
Texas Instruments
-
CDCVF2505PWR
Texas Instruments
-
RC19004A100GNL#KB0
Renesas Electronics Corporation
-
SI5351A-B-GTR
Skyworks Solutions Inc.
-
CY2305SXI-1T
Infineon Technologies
-
570BILFT
Renesas Electronics Corporation
-
CDCE913PWR
Texas Instruments
-
CY2305SXI-1HT
Infineon Technologies
-
DS1086LU+T
Analog Devices Inc./Maxim Integrated
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
