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Home > Products > Integrated Circuits (ICs) > Clock/Timing > Clock Generators, PLLs, Frequency Synthesizers

Infineon Technologies CY2309ZXC-1HT

Name: CY2309ZXC-1HT
Brand: Infineon Technologies
SKU: CY2309ZXC-1HT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: CY2309ZXC-1HT

Manufacturer:: Infineon Technologies

Category:: Clock Generators, PLLs, Frequency Synthesizers

Package:: 16-TSSOP (0.173", 4.40mm Width)

Datasheet:: CY2309ZXC-1HT.pdf

Description:: IC FANOUT BUFFER 16TSSOP

Quantity:: RFQ Add To RFQ list

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Inventory:4,158

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Product details

Overview

CY2309ZXC-1HT from Infineon Technologies (formerly Cypress) is a 3.3 V zero-delay clock buffer IC with integrated PLL, delivering nine low-skew outputs in two banks (4+4+1), operating up to 133 MHz, featuring 60 ps typical cycle-to-cycle jitter and 85 ps typical output-to-output skew, used for clock distribution in Pentium-based CPU and PCI bus systems.

For engineers reviewing the CY2309ZXC-1HT datasheet, CY2309ZXC-1HT pinout, CY2309ZXC-1HT application, or CY2309ZXC-1HT equivalent, key selection criteria include input frequency range (10–133 MHz), bank-selectable output control (S1/S2), test-mode bypass capability, high-drive (-1H) output drive strength, and TSSOP-16 package compatibility.

Technical Context

The CY2309ZXC-1HT implements an on-chip PLL with internal feedback from the CLKOUT pin to achieve zero input-output propagation delay when all outputs-including CLKOUT-are uniformly loaded. Its dual-bank architecture (Bank A: CLKA1–CLKA4; Bank B: CLKB1–CLKB4) enables selective three-state control via S1/S2 inputs.

It supports test mode by routing REF directly to outputs (bypassing PLL) and enters power-down mode (<25 µA IDD) when REF has no rising edges. The -1H suffix denotes higher drive strength: 12 mA sink/source vs. 8 mA for -1 versions, enabling faster edge rates and improved signal integrity at 100–133 MHz.

Key Specifications

Parameter	Value and Actual Design Meaning
Operating Frequency	10 MHz to 133 MHz - supports PCI bus and Pentium-class CPU clock domains
Supply Voltage	3.0 V to 3.6 V - compatible with standard 3.3 V logic rails and noise margins
Output Skew	85 ps typical - ensures synchronous timing across nine outputs in multi-processor or memory interface applications
Jitter (Cycle-to-Cycle)	60 ps typical - meets tight timing budgets for high-speed DDR and parallel bus interfaces
Drive Strength	12 mA sink/source - enables driving 10 pF loads at 133 MHz with controlled rise/fall times
Input Tolerance	5 V tolerant REF input - allows direct interfacing with legacy 5 V clock sources without level shifters
Power-Down Current	<25 µA - reduces system standby power when reference clock is inactive

Pinout & Package

Package: 16-pin 4.4-mm TSSOP (lead pitch: 0.65 mm), RoHS-compliant, moisture sensitivity level 3.

Pin/Terminal	Circuit Role	Design Meaning
1 REF	Reference clock input	5 V tolerant, threshold = VDD/2; weak pull-down; PLL reference source
2–3, 14–15 CLKA1–CLKA4	Bank A buffered outputs	Grouped outputs controllable via S1/S2; weak pull-down; driven in normal mode
6–7, 10–11 CLKB1–CLKB4	Bank B buffered outputs	Independent bank; three-statable via S1/S2 decoding; same drive as Bank A
8 S2, 9 S1	Select inputs	Weak pull-up; configure output enable/bypass mode per Select Input Decoding table
16 CLKOUT	Internal PLL feedback output	Must be loaded identically to other outputs to maintain zero delay; drives PLL loop
4, 13 VDD	Power supply	3.3 V supply pins; decoupling required near both for noise suppression
5, 12 GND	Ground	Dual ground pins reduce return path inductance and improve skew performance

Key Features

Feature	Design Value
Zero input-output delay	PLL feedback from CLKOUT enables precise phase alignment-critical for synchronous bus timing
Bank-selectable outputs	S1/S2 inputs allow dynamic three-state control of Bank B, reducing EMI and power during idle cycles
Test mode bypass	Direct REF-to-output path (S1=1, S2=0) enables system-level clock validation without PLL lock dependency
High-drive (-1H) outputs	12 mA drive supports 10 pF loads at 133 MHz with <1 ns rise/fall times-improves signal fidelity over SOIC variants

Applications

PCI Bus Clock Distribution

Pentium-Based CPU Systems

Use Scenario: Distributing a 33 MHz master clock to multiple PCI slots with matched trace lengths.

IC Role / Device Role / Timing Role: Zero-delay buffer ensuring simultaneous clock arrival across all peripheral slots.

Use Value: Eliminates inter-slot setup/hold violations; maintains PCI spec compliance for t_CO and skew limits.

Use Scenario: Providing synchronized clocks to CPU core, L2 cache, and chipset in embedded Pentium-class industrial controllers.

IC Role / Device Role / Timing Role: Low-skew clock fanout device with bank isolation for modular power management.

Use Value: Enables independent clock gating of cache subsystems while preserving timing integrity for CPU-core interfaces.

DDR Memory Interface

Multi-Processor Synchronization

Use Scenario: Driving address/control clocks to dual DDR SDRAM banks in telecom baseband processing units.

IC Role / Device Role / Timing Role: High-frequency (100–133 MHz) clock repeater with sub-100 ps skew between banks.

Use Value: Meets DDR2 t_AC and t_DQSQ specifications under temperature variation (–40°C to +85°C).

Use Scenario: Aligning clock domains across four ARM Cortex-A9 cores in a tightly coupled SoC development platform.

IC Role / Device Role / Timing Role: Reference clock distributor with guaranteed inter-device skew <700 ps across multiple CY2309 units.

Use Value: Enables deterministic inter-core communication without additional deskew circuitry or FPGA-based compensation.

Equivalent & Alternatives

Two validated alternatives exist for CY2309ZXC-1HT, differing in output count, drive strength, and package options.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ICS553M-01ILF	8-output, 3.3 V, 133 MHz max, 75 ps skew, SOIC-20 package	No bank-select or test-mode bypass; fixed output configuration	Choose when fewer outputs are needed and system-level PLL bypass is unnecessary
PI6C20400LEX	9-output, 3.3 V, 150 MHz max, 50 ps skew, TSSOP-20 package, integrated spread-spectrum	Includes EMI reduction; no S1/S2 control; higher cost and larger footprint	Choose for noise-sensitive applications requiring FCC/CE compliance without external filtering

Compared with ICS553M-01ILF and PI6C20400LEX, the CY2309ZXC-1HT uniquely balances bank-select flexibility, test-mode accessibility, and TSSOP-16 compactness-making it optimal for space-constrained, multi-domain clocking where dynamic output control matters.

Availability

CY2309ZXC-1HT is available at Aetrix Electronics and suitable for PCI bus clock distribution, Pentium-based CPU systems, and DDR memory interface applications requiring stable component supply across industrial temperature ranges (–40°C to +85°C).

Supply support for CY2309ZXC-1HT 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 markets.

The CY2309 series belongs to Infineon's legacy clock buffer portfolio-originally developed by Cypress-to deliver cost-optimized, low-jitter clock distribution for x86-compatible and embedded computing platforms.

FAQ

What is the function of the CLKOUT pin on CY2309ZXC-1HT?

The CLKOUT pin provides internal PLL feedback and must be loaded identically to other outputs to achieve zero input-output delay. Even if unused, it requires a capacitive load matching the output load (e.g., 10 pF at 133 MHz) to maintain phase alignment. It is not intended as a general-purpose output but is essential for PLL stability and skew control.

How does the S1/S2 select logic affect output behavior?

S1 and S2 determine output state per the Select Input Decoding table: S1=0/S2=0 three-states both banks; S1=1/S2=0 enables Bank A only; S1=0/S2=1 enables Bank B only; S1=1/S2=1 enables all outputs with PLL active. This allows dynamic power gating and test-mode operation without external logic.

Can CY2309ZXC-1HT operate with a 25 MHz input and drive 30 pF loads?

Yes. At 25 MHz, the device supports up to 30 pF load capacitance per output (per datasheet Operating Conditions). With its 12 mA drive strength and 3.3 V supply, it delivers clean edges into 30 pF, maintaining <85 ps skew and <60 ps jitter-suitable for legacy ISA or LPC bus clocking.

Is the CY2309ZXC-1HT pin-compatible with CY2309SC-1HT?

Yes. Both share identical 16-pin TSSOP pinout, electrical characteristics, and functional behavior. The "ZXC" suffix indicates tape-and-reel packaging with extended industrial temperature rating (–40°C to +85°C), while "SC" denotes standard commercial grade (0°C to +70°C); no pin or logic differences exist.

CY2309ZXC-1HT 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:: Not Verified

Type:: Fanout Buffer (Distribution), Zero Delay Buffer

PLL:: Yes with Bypass

Input:: LVCMOS, LVTTL

Output:: LVCMOS

Number of Circuits:: 1

Ratio - Input:Output:: 1:9

Differential - Input:Output:: No/No

Frequency - Max:: 133.33MHz

Divider/Multiplier:: No/No

Voltage - Supply:: 3V ~ 3.6V

Operating Temperature:: 0°C ~ 70°C

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

Supplier Device Package:: 16-TSSOP

CY2309ZXC-1HT FAQ

1.How can I place an order for CY2309ZXC-1HT through Aetrix?

Please submit a Request for Quotation (RFQ) for CY2309ZXC-1HT 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 CY2309ZXC-1HT reliable?

The price and inventory of CY2309ZXC-1HT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY2309ZXC-1HT is usually 5 days.

3.What payment methods are accepted for CY2309ZXC-1HT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY2309ZXC-1HT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CY2309ZXC-1HT?

CY2309ZXC-1HT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CY2309ZXC-1HT 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 CY2309ZXC-1HT?

For technical support, including CY2309ZXC-1HT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY2309ZXC-1HT requirements.

6.How does Aetrix verify that CY2309ZXC-1HT is sourced from the original manufacturer or authorized distributors?

All CY2309ZXC-1HT 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 CY2309ZXC-1HT meets industry standards.

7.What is the process for return or replacement of CY2309ZXC-1HT?

All CY2309ZXC-1HT units undergo pre-shipment inspection (PSI). If there is an issue with CY2309ZXC-1HT, 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 CY2309ZXC-1HT part is unused and in its original packaging.

Return procedure for CY2309ZXC-1HT:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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