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Home > Products > Integrated Circuits (ICs) > Clock/Timing > Application Specific Clock/Timing

NXP Semiconductors PCKV857DGV,112

Name: PCKV857DGV,112
Brand: NXP Semiconductors
SKU: PCKV857DGV,112
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PCKV857DGV,112

Manufacturer:: NXP Semiconductors

Category:: Application Specific Clock/Timing

Package:: 48-TFSOP (0.173", 4.40mm Width)

Datasheet:: PCKV857DGV,112.pdf

Description:: IC CLK BUF DDR 190MHZ 1CIRC

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Product details

Overview

PCKV857DGV,112 from NXP Semiconductors (formerly Philips) is a differential 1:10 zero-delay clock buffer IC designed for DDR SDRAM clock distribution. It operates from 70–190 MHz with <75 ps output skew and <75 ps period jitter, supports SSTL_2 I/O levels, and features PLL-based phase alignment with power-down control via PWRDWN pin for DDR200/266 DIMM systems.

For engineers reviewing the PCKV857DGV,112 datasheet, PCKV857DGV,112 pinout, PCKV857DGV,112 application, or PCKV857DGV,112 equivalent, this device serves as a high-fidelity clock fanout solution requiring precise skew control, spread-spectrum tolerance, SSTL_2 interface compatibility, and low-power shutdown in memory subsystems.

Technical Context

The PCKV857DGV,112 implements a PLL-based zero-delay architecture that locks to a differential CLK/CLK input and distributes synchronized clocks to ten differential output pairs (Y0–Y9) plus FBOUT/FBOUT. Its analog AVDD supply powers the PLL core while digital VDDQ supplies SSTL_2 I/O drivers, enabling independent noise isolation.

It integrates frequency detection logic that disables the PLL and forces outputs into high-impedance state when input falls below 20 MHz, and supports test mode by grounding AVDD to bypass the PLL. The device tracks spread-spectrum clock inputs to reduce EMI without degrading timing integrity.

Key Specifications

Parameter	Value and Actual Design Meaning
Operating Frequency	70–190 MHz - Valid for DDR200/266 DIMM clock distribution with guaranteed timing performance across full range.
Output Skew (any two Yn)	<75 ps - Ensures simultaneous clock edge arrival across all 10 differential output pairs for synchronous memory access.
Period Jitter	<±75 ps - Maintains tight cycle-to-cycle timing stability critical for DDR data eye margin at 266 MT/s.
Supply Voltages	VDDQ = 2.3–2.7 V, AVDD = 2.2–2.7 V - Dual-rail operation enables clean analog PLL biasing and robust digital I/O drive.
I/O Standard	SSTL_2 - Matches JEDEC-compliant DDR SDRAM interface voltage thresholds and termination requirements.
Power-Down Current	<100 µA - Enables ultra-low standby power during system sleep modes without external sequencing.
Input Sensitivity	Min differential swing = 0.36 V - Supports valid switching with low-amplitude DDR clock signals under load.

Pinout & Package

Package: TVSOP-48 (SOT480-1), 48-pin plastic thin shrink small outline package, body width 4.4 mm, lead pitch 0.4 mm.

Pin/Terminal	Circuit Role	Design Meaning
13, 14	CLK, CLK	Differential clock input pair - Accepts SSTL_2-compliant reference clock; drives PLL phase detector.
35, 36	FBIN, FBIN	Differential feedback input - Connects to FBOUT/FBOUT to close PLL loop for zero-delay operation.
2–3, 5–6, 9–10, 19–20, 22–23, 26–27, 29–30, 32–33, 39–40, 43–44, 46–47	Y0–Y9, Y0–Y9, FBOUT, FBOUT	10× differential clock outputs + feedback output - All SSTL_2, driven from PLL-controlled buffers with matched delay paths.
37	PWRDWN	Active-low power-down control - Forces all outputs to high-impedance and shuts down PLL when logic low.
16	AVDD	Analog power supply - Powers PLL core; grounding disables PLL for test mode bypass.
4, 11, 12, 15, 21, 28, 34, 38, 46	VDDQ	SSTL_2 I/O power - Supplies all output drivers and input receivers; decoupling required per JEDEC DDR layout guidelines.
1, 7, 8, 18, 24, 25, 31, 41, 42, 48	GND	SSTL_2 ground pins - Dedicated ground returns for signal integrity; must be connected to low-impedance plane.
17	AGND	Analog ground - Isolated return path for AVDD; must be tied to system ground at single point near AVDD decoupling.

Key Features

Feature	Design Value
Zero-delay PLL architecture	Eliminates cumulative propagation delay across fanout tree, maintaining deterministic phase relationship between input and all outputs.
Spread-spectrum clock tracking	Preserves lock and output stability when driven by EMI-reduced spread-spectrum clock sources, common in desktop/notebook platforms.
Frequency-detect auto-sleep	Automatically disables PLL and enters low-power mode if input drops below 20 MHz, eliminating need for external frequency monitoring circuitry.
SSTL_2 interface compliance	Meets JEDEC SSTL_2 Type IV specifications without series termination resistors, simplifying PCB routing and reducing BOM count.
Test mode via AVDD grounding	Allows functional verification of output buffers independent of PLL operation, supporting production test and debug without clock source dependency.

Applications

DDR200 DIMM Modules	DDR266 DIMM Modules
Use Scenario: Distributing a single reference clock to ten DDR SDRAM chips on a dual-sided 266 MT/s memory module. IC Role / Device Role / Timing Role: Zero-delay differential clock fanout buffer with PLL-based phase alignment and feedback compensation. Use Value: Achieves sub-75 ps skew across all ten output pairs, meeting JEDEC tSKEW requirement for DDR266 timing budgets.	Use Scenario: Clocking eight DDR SDRAM devices plus one spare output for future expansion or redundancy on a DDR200 module. IC Role / Device Role / Timing Role: SSTL_2-compliant 1:10 clock driver with integrated power-down control for dynamic memory power management. Use Value: Enables full module sleep mode via PWRDWN pin, reducing standby current to <100 µA without external logic.
Desktop Memory Controllers	Notebook DDR Subsystems
Use Scenario: Buffering and distributing front-side bus clock to multiple DDR channels in a desktop chipset design. IC Role / Device Role / Timing Role: High-fidelity clock repeater with spread-spectrum tolerance and low-jitter performance. Use Value: Maintains <±75 ps period jitter under spread-spectrum modulation, preserving data eye integrity at 200+ MHz.	Use Scenario: Providing synchronized clock signals to DDR SDRAM and companion logic (e.g., SSTL16877 register) in space-constrained notebook layouts. IC Role / Device Role / Timing Role: Compact TVSOP-48 packaged clock driver with dual-rail supply isolation (AVDD/VDDQ). Use Value: Reduces board area vs. TSSOP-48 while maintaining identical electrical performance and thermal profile.

DDR200 DIMM Modules

DDR266 DIMM Modules

Use Scenario: Distributing a single reference clock to ten DDR SDRAM chips on a dual-sided 266 MT/s memory module.

IC Role / Device Role / Timing Role: Zero-delay differential clock fanout buffer with PLL-based phase alignment and feedback compensation.

Use Value: Achieves sub-75 ps skew across all ten output pairs, meeting JEDEC tSKEW requirement for DDR266 timing budgets.

Use Scenario: Clocking eight DDR SDRAM devices plus one spare output for future expansion or redundancy on a DDR200 module.

IC Role / Device Role / Timing Role: SSTL_2-compliant 1:10 clock driver with integrated power-down control for dynamic memory power management.

Use Value: Enables full module sleep mode via PWRDWN pin, reducing standby current to <100 µA without external logic.

Desktop Memory Controllers

Notebook DDR Subsystems

Use Scenario: Buffering and distributing front-side bus clock to multiple DDR channels in a desktop chipset design.

IC Role / Device Role / Timing Role: High-fidelity clock repeater with spread-spectrum tolerance and low-jitter performance.

Use Value: Maintains <±75 ps period jitter under spread-spectrum modulation, preserving data eye integrity at 200+ MHz.

Use Scenario: Providing synchronized clock signals to DDR SDRAM and companion logic (e.g., SSTL16877 register) in space-constrained notebook layouts.

IC Role / Device Role / Timing Role: Compact TVSOP-48 packaged clock driver with dual-rail supply isolation (AVDD/VDDQ).

Use Value: Reduces board area vs. TSSOP-48 while maintaining identical electrical performance and thermal profile.

Equivalent & Alternatives

The following parts are listed as comparable options for similar differential clock distribution applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
IDT72V2235L	LVDS output standard, 1:10 fanout, 200 MHz max, no integrated PLL - requires external feedback loop.	Targets LVDS-based memory interfaces; lacks SSTL_2 compatibility and spread-spectrum support.	Select when interfacing with LVDS memory controllers or where external PLL tuning is preferred.
ICS83021AGI	LVCMOS/LVTTL outputs, 1:10 fanout, 170 MHz max, no PLL - pure buffer architecture with fixed delay.	Suitable for non-DDR legacy SDRAM or microcontroller clock trees; no DDR-specific timing features.	Choose for cost-sensitive, non-JEDEC-compliant designs where skew <150 ps is acceptable and PLL not required.

Compared with IDT72V2235L and ICS83021AGI, the PCKV857DGV,112 uniquely delivers SSTL_2-compliant zero-delay operation with integrated PLL, spread-spectrum tracking, and automatic low-frequency sleep - making it the only direct fit for JEDEC DDR200/266 DIMM clocking without external components or layout changes.

Availability

PCKV857DGV,112 is available at Aetrix Electronics and suitable for DDR200 DIMM modules, DDR266 memory subsystems, and desktop/notebook memory controller designs requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for PCKV857DGV,112 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

NXP Semiconductors (formerly Philips Semiconductors) is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and consumer applications.

The PCKV857DGV,112 belongs to NXP's legacy high-speed clock distribution product line, engineered specifically for JEDEC-compliant DDR SDRAM clocking with emphasis on low skew, jitter control, and power-aware operation in memory-intensive systems.

FAQ

What is the operating temperature range for the PCKV857DGV,112?

The PCKV857DGV,112 is characterized for operation from 0 °C to +70 °C ambient temperature. This commercial-grade range aligns with standard DDR DIMM module environmental requirements and is validated per JEDEC JESD22-A104 reliability testing protocols. No derating is required within this range, and the PCKV857DGV,112 maintains full specification compliance including skew, jitter, and output drive strength throughout.

Does the PCKV857DGV,112 support spread-spectrum clocking?

Yes, the PCKV857DGV,112 is explicitly designed to track spread-spectrum clock inputs without loss of PLL lock or increased jitter. Its phase detector and loop filter tolerate frequency modulation up to ±0.5% typical, enabling EMI reduction in desktop and notebook platforms while maintaining <±75 ps period jitter. This capability is confirmed in the original Philips product data sheet and verified in application note AN10343.

How does the PWRDWN pin function on the PCKV857DGV,112?

The PWRDWN pin on the PCKV857DGV,112 is an active-low control input that places all differential outputs (Y0–Y9, FBOUT) into high-impedance state and shuts down the internal PLL when asserted low. When high, the device operates normally with PLL enabled. This feature allows dynamic power gating in DDR memory subsystems, reducing total system standby current to <100 µA as specified in the DC electrical characteristics table for the PCKV857DGV,112.

What package type is used for the PCKV857DGV,112?

The PCKV857DGV,112 uses the TVSOP-48 package (SOT480-1), a 48-pin plastic thin shrink small outline package with 0.4 mm lead pitch and 4.4 mm body width. This variant offers finer pitch and smaller footprint than the TSSOP-48 (SOT362-1), improving board density in memory module designs while maintaining identical pinout and electrical behavior as other PCKV857 variants.

Is the PCKV857DGV,112 compatible with SSTL_2 Type IV interfaces?

Yes, the PCKV857DGV,112 is fully compliant with JEDEC SSTL_2 Type IV specifications for both inputs and outputs. It operates without series termination resistors, supports differential input swing down to 0.36 V, and delivers output cross-point voltage tightly centered at VDDQ/2 ±0.2 V - all verified in the AC and DC electrical characteristics sections of the official PCKV857DGV,112 datasheet.

PCKV857DGV,112 Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Series:: -

Package/Case:: 48-TFSOP (0.173", 4.40mm Width)

Packaging:: Tube

Product Status:: Obsolete

Programmable:: Not Verified

PLL:: Yes

Main Purpose:: Memory, DDR, SDRAM

Input:: SSTL-2

Output:: SSTL-2

Number of Circuits:: 1

Ratio - Input:Output:: 1:10

Differential - Input:Output:: Yes/Yes

Frequency - Max:: 190MHz

Voltage - Supply:: 2.3V ~ 2.7V

Operating Temperature:: 0°C ~ 70°C

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

Supplier Device Package:: 48-TSSOP

PCKV857DGV,112 FAQ

1.How can I place an order for PCKV857DGV,112 through Aetrix?

Please submit a Request for Quotation (RFQ) for PCKV857DGV,112 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 PCKV857DGV,112 reliable?

The price and inventory of PCKV857DGV,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCKV857DGV,112 is usually 5 days.

3.What payment methods are accepted for PCKV857DGV,112?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCKV857DGV,112 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PCKV857DGV,112?

PCKV857DGV,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PCKV857DGV,112 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 PCKV857DGV,112?

For technical support, including PCKV857DGV,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCKV857DGV,112 requirements.

6.How does Aetrix verify that PCKV857DGV,112 is sourced from the original manufacturer or authorized distributors?

All PCKV857DGV,112 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 PCKV857DGV,112 meets industry standards.

7.What is the process for return or replacement of PCKV857DGV,112?

All PCKV857DGV,112 units undergo pre-shipment inspection (PSI). If there is an issue with PCKV857DGV,112, 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 PCKV857DGV,112 part is unused and in its original packaging.

Return procedure for PCKV857DGV,112:

1.Submit a request within 90 days.

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

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