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Infineon Technologies CY2318ANZPVXC-11T
- Part No.:
- CY2318ANZPVXC-11T
- Manufacturer:
- Infineon Technologies
- Category:
- Application Specific Clock/Timing
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
CY2318ANZPVXC-11T.pdf
- Description:
- IC CLK BUFF 18OUT SDRAM 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,317
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Product details
Overview
CY2318ANZPVXC-11T from Cypress Semiconductor is a 3.3V, 18-output SDRAM clock buffer designed for desktop PC motherboards supporting up to four DDR SDRAM DIMMs. It features 150 ps typical output-output skew, 100 MHz maximum operation, serial interface for per-output enable/disable control, and dedicated OE pin for ATE testing.
For engineers reviewing the CY2318ANZPVXC-11T datasheet, CY2318ANZPVXC-11T pinout, CY2318ANZPVXC-11T application, or CY2318ANZPVXC-11T equivalent, key selection criteria include SDRAM byte-group clock distribution capability, 5V-tolerant BUF_IN input, I²C-compatible serial control (SDATA/SCLK), VDDIIC/VSSIIC isolated supply for interface integrity, and SSOP-48 thermal and routing constraints in high-density Pentium II–class designs.
Technical Context
The CY2318ANZPVXC-11T implements a single-input, 18-output fanout architecture with three functional output groups: sixteen outputs assigned to four SDRAM byte lanes (0–3, 4–7, 8–11, 12–15), plus two dedicated feedback outputs (SDRAM16/SDRAM17). All outputs are CMOS-compatible and driven from a common internal buffer stage synchronized to BUF_IN.
Its serial interface uses a fixed 7-bit address (1101001) with R/W bit, supports three-byte configuration mapping for output enable states, and relies on internal pull-ups (>100 kΩ) on SDATA, SCLK, and OE. The device requires separate 3.3V digital (VDD/VSS) and I²C interface (VDDIIC/VSSIIC) supplies to isolate noise-sensitive control logic from clock distribution paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.135–3.465 V - ensures stable operation across industrial-grade voltage tolerance for motherboard VRM ripple |
| Max Operating Frequency | 100 MHz - supports Pentium II front-side bus timing and SDRAM CL2/CL3 access cycles |
| Output-Output Skew | 150 ps typ. - maintains tight inter-byte clock alignment critical for multi-DIMM synchronous read/write |
| Input Tolerance | BUF_IN tolerant to 7.0 V - allows direct connection to 5V clock sources without level-shifting |
| Serial Interface | I²C-compatible SDATA/SCLK with VDDIIC/VSSIIC isolation - enables dynamic output gating without disrupting main clock path |
| Propagation Delay | 1.0–5.0 ns (LH/HL) - guarantees sub-nanosecond jitter contribution to system-level timing budget |
| Load Capacitance | 20–30 pF - matches standard PCB trace + SDRAM input capacitance for impedance-controlled routing |
Pinout & Package
Package: 48-pin Shrunk Small Outline Package (SSOP), 0.300-inch body width, 0.025-inch pitch, JEDEC MO-153 compliant. Thermal pad not present; power dissipation managed via VDD/VSS pin count and layout-aware copper pour.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BUF_IN (Pin 11) | Primary clock input | 5V-tolerant, VDD/2 threshold, drives all 18 outputs synchronously |
| OE (Pin 38) | Global output enable | Active-HIGH; forces all outputs to high-impedance when LOW - used for ATE boundary scan |
| SDATA (Pin 24), SCLK (Pin 25) | Serial configuration interface | I²C-style control with dedicated VDDIIC/VSSIIC supplies - enables per-output enable/disable without reset |
| VDD (Pins 3,7,12,16,20,29,33,37,42,46) | Digital power supply | 10 pins distributed across package - reduces IR drop and improves PSRR for clock integrity |
| VSS (Pins 6,10,15,19,22,27,30,34,39,43) | Digital ground | 10 ground pins interleaved with VDD - minimizes ground bounce during simultaneous output switching |
| SDRAM[0–15] (Pins 4,5,8,9,13,14,17,18,31,32,35,36,40,41,44,45) | SDRAM byte clock outputs | Grouped as four 4-bit lanes - each lane drives one SDRAM DIMM's DQS/DQ lines in lockstep |
| SDRAM[16–17] (Pins 21,28) | Feedback clock outputs | Connect to PLL reference inputs - provides clean, low-skew feedback for system clock synthesis |
Key Features
| Feature | Design Value |
|---|---|
| Per-output serial enable/disable | Three-byte register map over SDATA/SCLK allows selective activation of SDRAM byte lanes during power-down sequences |
| 150 ps output skew | Guaranteed by matched internal routing and output driver design - eliminates inter-DIMM setup/hold violations |
| Dedicated OE pin | Hardware-level three-state control independent of serial interface - enables board-level test mode without firmware involvement |
| 5V-tolerant BUF_IN | Accepts 5V clock signals directly from legacy synthesizers (e.g., CY2280 series) - avoids external level shifters |
| VDDIIC/VSSIIC isolation | Separate analog-grade supply domain for serial interface - prevents digital switching noise from corrupting configuration writes |
Applications
| Desktop PC Motherboard Clock Distribution | Pentium II Reference Design |
|---|---|
Use Scenario: Distributing synchronized clock signals to four SDRAM DIMM slots on a commercial desktop motherboard. IC Role / Device Role / Timing Role: Primary SDRAM clock fanout buffer with per-lane enable control and feedback outputs for PLL stabilization. Use Value: Enables concurrent access to multiple DIMMs while maintaining <150 ps inter-lane skew - critical for burst-mode memory transfers at 100 MHz. | Use Scenario: Integration into Intel Pentium II reference platform designs requiring strict FSB and SDRAM timing compliance. IC Role / Device Role / Timing Role: Clock distribution hub paired with CY2280-series synthesizers to meet Intel's 66/100 MHz FSB specification. Use Value: Delivers guaranteed 100 MHz operation with 45–55% duty cycle - satisfies Pentium II clock waveform requirements without external conditioning. |
| Multi-DIMM Memory Subsystem | Legacy SDRAM Test Fixture |
Use Scenario: Driving eight-byte-wide SDRAM interfaces across dual-channel memory configurations. IC Role / Device Role / Timing Role: Byte-grouped clock generator with independent enable per group - supports partial DIMM population and power-gating. Use Value: Serial configuration allows runtime disabling of unused SDRAM lanes - reduces dynamic power by >30% in partially populated systems. | Use Scenario: ATE-based validation of SDRAM timing margins using controlled clock skew injection. IC Role / Device Role / Timing Role: Programmable skew source with hardware OE override - enables deterministic clock gating for test pattern sequencing. Use Value: Dedicated OE pin permits full output disable during boundary-scan testing - eliminates false clocking of DUT memory during JTAG operations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SDRAM clock buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT74FCT162374CPAG | 16-bit non-inverting latch with 3-state outputs; no serial interface or feedback outputs | Lacks per-output control, skew optimization, and SDRAM-specific grouping - requires external logic for DIMM enable sequencing | Select only if discrete latch functionality suffices and system-level skew management is handled elsewhere |
| ICS557GI-11LFT | 10-output LVCMOS buffer; no serial interface, no feedback outputs, max 85 MHz operation | Insufficient output count for 4-DIMM support; limited frequency headroom for 100 MHz SDRAM timing | Use only in cost-sensitive, lower-bandwidth designs where DIMM count ≤ 2 and FSB ≤ 66 MHz |
Compared with IDT74FCT162374CPAG and ICS557GI-11LFT, the CY2318ANZPVXC-11T uniquely integrates 18-output fanout, byte-grouped SDRAM clocking, serial configurability, and dedicated feedback paths - making it the only option qualified for full-featured Pentium II–class 4-DIMM memory subsystems.
Availability
CY2318ANZPVXC-11T is available at Aetrix Electronics and suitable for desktop PC motherboard manufacturing, Pentium II reference design validation, and multi-DIMM memory subsystem development requiring stable component supply and long-term obsolescence planning.
Supply support for CY2318ANZPVXC-11T 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 U.S.-based semiconductor company specializing in timing, memory, and programmable solutions for computing and communications infrastructure.
The CY2318ANZ belongs to Cypress's high-speed clock buffer product line, engineered specifically for PC platform clock distribution with emphasis on SDRAM interface integrity, low skew, and system-level testability.
FAQ
Is CY2318ANZPVXC-11T pin-compatible with CY2318ANZPVC-11T?
Yes. Both variants share identical 48-pin SSOP footprint, pin assignment, and electrical characteristics. The "X" suffix denotes lead-free (Pb-free) construction per JEDEC J-STD-609, while "PVC" indicates standard SnPb finish. No layout or schematic changes are required for migration.
What is the function of VDDIIC and VSSIIC pins?
VDDIIC (Pin 23) and VSSIIC (Pin 26) supply power and ground exclusively to the serial interface circuitry (SDATA/SCLK). This isolation prevents digital switching noise from the main clock distribution network from corrupting serial configuration writes, ensuring reliable per-output enable/disable control.
Can CY2318ANZPVXC-11T drive loads beyond 30 pF?
No. Electrical specifications guarantee performance only up to 30 pF load capacitance. Driving higher capacitive loads increases propagation delay, degrades edge rate, and may cause output skew to exceed 250 ps - violating SDRAM timing margins. External buffering is required for >30 pF loads.
Does the serial interface require external pull-up resistors?
No. SDATA, SCLK, and OE pins feature internal pull-up resistors (>100 kΩ to VDD), eliminating need for external components. However, external 4.7 kΩ pull-ups are recommended for robust noise immunity in high-noise motherboard environments per Cypress Application Note AN2280.
CY2318ANZPVXC-11T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 48-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- PLL:
- No
- Main Purpose:
- Intel CPU, Memory, SRAM DIMM
- Input:
- LVCMOS, LVTTL
- Output:
- LVCMOS
- Number of Circuits:
- 1
- Ratio - Input:Output:
- 1:18
- Differential - Input:Output:
- No/No
- Frequency - Max:
- 100MHz
- Voltage - Supply:
- 3.135V ~ 3.465V
- Operating Temperature:
- 0°C ~ 70°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 48-SSOP
CY2318ANZPVXC-11T FAQ
1.How can I place an order for CY2318ANZPVXC-11T through Aetrix?
Please submit a Request for Quotation (RFQ) for CY2318ANZPVXC-11T 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 CY2318ANZPVXC-11T reliable?
The price and inventory of CY2318ANZPVXC-11T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY2318ANZPVXC-11T is usually 5 days.
3.What payment methods are accepted for CY2318ANZPVXC-11T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY2318ANZPVXC-11T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY2318ANZPVXC-11T?
CY2318ANZPVXC-11T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY2318ANZPVXC-11T 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 CY2318ANZPVXC-11T?
For technical support, including CY2318ANZPVXC-11T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY2318ANZPVXC-11T requirements.
6.How does Aetrix verify that CY2318ANZPVXC-11T is sourced from the original manufacturer or authorized distributors?
All CY2318ANZPVXC-11T 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 CY2318ANZPVXC-11T meets industry standards.
7.What is the process for return or replacement of CY2318ANZPVXC-11T?
All CY2318ANZPVXC-11T units undergo pre-shipment inspection (PSI). If there is an issue with CY2318ANZPVXC-11T, 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 CY2318ANZPVXC-11T part is unused and in its original packaging.
Return procedure for CY2318ANZPVXC-11T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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