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Home > Products > Integrated Circuits (ICs) > Clock/Timing - Clock Generators, PLLs, Frequency Synthesizers > CY2305ZC-1
Cypress Semiconductor Corp
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CY2305ZC-1

In Stock 801782 pcs Reference Price(In US Dollars)
1+
$0.0778
200+
$0.0302
500+
$0.0291
1000+
$0.0286
Manufacturer Part Number:
CY2305ZC-1
Manufacturer / Brand
Cypress Semiconductor Corp
Part of Description:
IC ZD BUFFER 8TSSOP
Datasheets:
Lead Free Status / RoHS Status:
RoHS non-compliant
Stock Condition:
New original, 801782 pcs Stock Available.
ECAD Model:
Ship From:
Hong Kong
Shipment Way:
DHL/Fedex/TNT/UPS

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Part Number CY2305ZC-1
Manufacturer / Brand Cypress Semiconductor Corp
Stock Quantity 801782 pcs Stock
Category Integrated Circuits (ICs) > Clock/Timing - Clock Generators, PLLs, Frequency Synthesizers
Description IC ZD BUFFER 8TSSOP
Lead Free Status / RoHS Status: RoHS non-compliant
Voltage - Supply 3V ~ 3.6V
Type Zero Delay Buffer
Supplier Device Package 8-TSSOP
Series -
Ratio - Input:Output 1:9
Package / Case 8-TSSOP (0.173", 4.40mm Width)
Package Bulk
PLL Yes with Bypass
Output Clock
Operating Temperature 0°C ~ 70°C (TA)
Number of Circuits 1
Mounting Type Surface Mount
Input Clock
Frequency - Max 133.33MHz
Divider/Multiplier No/No
Differential - Input:Output No/No

Packaging & ESD

Industry-standard static shielding packaging is used for electronic components.Anti-static, light-transparent materials allow easy identification of ICs and PCB assemblies.
The packaging structure provides electrostatic protection based on Faraday cage principles.This helps protect sensitive components from static discharge during handling and transportation.


All products are packed in ESD-safe anti-static packaging. Outer packaging labels include part number, brand, and quantity for clear identification. Goods are inspected prior to shipment to ensure proper condition and authenticity.

ESD protection is maintained throughout packing, handling, and global transportation. Secure packaging provides reliable sealing and resistance during transit. Additional cushioning materials are applied when required to protect sensitive components.

QC(Part Testing by IC Components)Quality Warranty

We can offer worldwide express delivery service, such as DHLor FedEx or TNT or UPS or other forwarder for shipment.

Global Shipment by DHL/FedEx/TNT/UPS

Shipping Fees reference DHL/FedEx
1). You can offer your express delivery account for shipment, ifyou haven’t any express account for shipment, we can offer our account inadvance.
2). Use our account for shipment, Shipment charges(Reference DHL/FedEx, Different Countries has different price.)
Shipment charges： (Reference DHL and FedEX)
Weight(KG): 0.00kg-1.00kg Price(USD$) : USD$60.00
Weight(KG): 1.00kg-2.00kg Price(USD$) : USD$80.00
* The price of cost is reference with DHL/FedEx. The detail charges, please contact us. Different country the express charges are different.



We accept the payment terms: Telegraphic Transfer(T/T), Credit Card, PayPal and Western Union.

PayPal:

PayPal Bank Information:
Company Name : IC COMPONENTS LTD
Paypal ID: PayPal@IC-Components.com

BANK TRANSFAR (Telegraphic Transfer)

Payment For Telegraphic Transfers:
Company Name : IC COMPONENTS LTD Beneficiary Account Number : 549-100669-701
Beneficiary Bank name : Bank of Communications (Hong Kong) Ltd Beneficiary Bank Code : 382 (for local payment)
Beneficiary Bank SWIFT : COMMHKHK
Beneficiary Bank Address : Tsuen Wan Market Street Branch 53 Market Street, Tsuen Wan N.T., Hong Kong

Any inquires or questions, please kindly contact us Email: Info@IC-Components.com


Frequently Asked Questions

CY2305ZC-1 can it operate reliably in an industrial temperature environment beyond 70°C?
The CY2305ZC-1 is specified for operation from 0°C to +70°C, which aligns with commercial-grade conditions. Prolonged exposure or continuous operation above +70°C may lead to frequency drift, phase noise degradation, or reduced reliability due to semiconductor stress. For industrial environments requiring extended temperature ranges, a component rated for -40°C to +85°C should be evaluated instead.
Is the CY2305ZC-1 suitable for use in a 5V system when interfacing with legacy logic?
No, the CY2305ZC-1 operates only at 3.0V to 3.6V supply voltage and does not support 5V logic levels directly. While some inputs may tolerate 5V via ESD protection diodes, exceeding VCC by more than 0.5V risks latch-up or damage. If interfacing with 5V logic, level-shifting circuitry or a buffer with 5V-tolerant inputs must be used.
Can the CY2305ZC-1 be replaced with a similar part without modifying the clock tree design?
Replacement depends on pin compatibility, output type, frequency range, and jitter performance. While other PLL-based oscillators like the Si5338 or LMK series offer similar features, they often require different configuration methods (e.g., EEPROM vs. register programming). Direct drop-in replacement is unlikely without verifying timing closure and signal integrity across the entire system.
What are the implications of using the CY2305ZC-1 as a reference clock for a PCIe Gen3 device?
The CY2305ZC-1 provides up to 133.33MHz output, which exceeds the required 100MHz reference for PCIe Gen3. However, phase noise and jitter must meet PCI-SIG specifications. At this frequency, the integrated PLL must be carefully configured to minimize jitter; otherwise, link training failures or data errors may occur despite sufficient bandwidth.
How should input clock stability affect the choice of external crystal for the CY2305ZC-1?
The CY2305ZC-1 requires a stable input reference, typically from a crystal oscillator. Poor-quality crystals with high aging rates or temperature sensitivity can degrade long-term frequency accuracy. A ±20 ppm crystal is recommended for applications requiring <±50 ppm total frequency error over time.
Can the CY2305ZC-1 support multiple output frequencies simultaneously without compromising phase alignment?
Yes, but only if outputs are derived from a single synthesized clock tree. The internal PLL generates a common feedback clock, so all outputs share the same phase noise profile. However, skew between outputs is minimized, making it suitable for multi-clock domains where relative timing matters.
What precautions should be taken during PCB layout when routing clocks driven by the CY2305ZC-1?
Clock traces should be routed as differential pairs if using LVDS outputs, with controlled impedance (typically 100Ω). Minimize vias and stubs to reduce reflections. Termination resistors must be placed close to the load. Keep analog power (AVDD) separate from digital power (DVDD) and filter both with low-noise regulators.
Is the CY2305ZC-1 suitable for battery-powered devices requiring ultra-low power consumption?
No, the CY2305ZC-1 is optimized for performance rather than power efficiency. Typical current draw at 133.33MHz is several hundred mA, which is excessive for battery applications. Low-power alternatives such as the SiT1532 or CDCE913 offer lower quiescent current while maintaining comparable functionality.
Can the output enable function on the CY2305ZC-1 be used for graceful shutdown in fault conditions?
Yes, the OE pin allows disabling outputs while retaining internal bias. However, disabling the clock does not reset internal state or change configuration registers. Ensure downstream logic handles glitches during transition to avoid metastability or incorrect initialization sequences.
What are the key differences between the CY2305ZC-1 and a standalone crystal oscillator module?
Unlike fixed-frequency crystal oscillators, the CY2305ZC-1 uses a programmable PLL allowing frequency synthesis from a single reference. This enables flexible clock generation but introduces complexity in calibration and potential jitter accumulation. Standalone oscillators provide deterministic latency and simpler integration but lack tunability.
Does the CY2305ZC-1 require external passive components for basic operation?
Yes, it requires an external crystal (typically 10–50 MHz) and associated load capacitors. These must be selected based on crystal datasheet specifications to ensure proper oscillation margin. Failure to match load capacitance can result in startup failure or unstable operation.
Can the CY2305ZC-1 drive multiple loads without additional buffering?
It can drive limited fanout depending on output type and load conditions. For CMOS outputs driving >10 pF or LVCMOS loads exceeding 16 mA, a buffer such as SN74LVC1G125 may be necessary to maintain rise/fall times and prevent excessive loading. Check output drive strength in the datasheet under worst-case conditions.
What happens if the input reference clock to the CY2305ZC-1 fails or loses lock?
Upon loss of reference, the internal PLL will lose lock, causing output to stop or produce erratic frequencies. Some variants include a holdover mode, but the CY2305ZC-1 does not support it. Design redundancy or fail-safe detection logic is recommended for critical systems.
Is the CY2305ZC-1 compatible with 3.3V-only microcontroller clock inputs?
Yes, both input and output interfaces are 3.3V tolerant. However, verify that the microcontroller’s clock input supports asynchronous edge triggering and has adequate setup/hold margins relative to the generated clock edges.
Should decoupling capacitors be placed near the CY2305ZC-1 power pins?
Absolutely. Place 0.1 µF ceramic capacitors as close as possible to each power pin (VDD and AVDD), using short, wide traces. Additional bulk capacitance (e.g., 1–10 µF) may be needed if the supply exhibits transient droop. Poor decoupling can induce jitter and instability.

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