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Diodes Incorporated PI49FCT32807QE
- Part No.:
- PI49FCT32807QE
- Manufacturer:
- Diodes Incorporated
- Category:
- Clock Buffers, Drivers
- Package:
- 20-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
PI49FCT32807QE.pdf
- Description:
- IC CLK BUFFER 1:10 133MHZ 20QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:9,119
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Product details
Overview
PI49FCT32807QE from Diodes Incorporated is a 3.3V, 1:10 CMOS clock buffer with rail-to-rail outputs, <200ps output skew, <2.5ns propagation delay, and 5V-tolerant input-designed for low-noise clock distribution in industrial timing systems requiring stable 133MHz operation.
For engineers reviewing the PI49FCT32807QE datasheet, PI49FCT32807QE pinout, PI49FCT32807QE application, or PI49FCT32807QE equivalent, key selection criteria include output skew budget, input capacitance (<6.0pF), integrated 22Ω series damping resistors, and QSOP-20 thermal performance under –40°C to +85°C conditions.
Technical Context
The PI49FCT32807QE implements a single-input, ten-output fanout architecture with on-die series termination on all B0–B9 outputs to suppress reflections and reduce EMI. Its CMOS output stage delivers rail-to-rail swing (VOH ≥2.4V, VOL ≤0.5V at 3.3V) while maintaining fast edge rates (<1.5ns rise/fall).
It operates across 3.3V ±10% supply with <30µA quiescent current and supports 5V logic-level inputs without external level shifters. Propagation delay variation (tSK(O) ≤200ps) and pulse skew (tSK(P) ≤350ps) are guaranteed by design-not production tested-enabling deterministic timing in synchronous backplanes and FPGA clock trees.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.3V ±10% - ensures compatibility with standard LVCMOS I/O domains and eliminates need for dedicated voltage regulators. |
| Output Skew (tSK(O)) | ≤200ps - guarantees tight phase alignment across all 10 outputs for multi-sink synchronous clocking. |
| Propagation Delay | ≤2.5ns - enables sub-400MHz timing margin in high-speed control loops and DDR interface clocks. |
| Input Capacitance | <6.0pF - minimizes loading on upstream clock sources such as crystal oscillators or PLLs. |
| Max Switching Frequency | 133MHz - supports PCIe Gen1, USB 1.1, and legacy processor bus clocking without derating. |
| Output Series Resistance | 22Ω - integrated damping reduces overshoot/ringing on PCB traces up to 10cm length at 133MHz. |
| Operating Temperature | –40°C to +85°C - validated for industrial-grade embedded controllers and base station timing modules. |
Pinout & Package
Package: 20-pin QSOP (150-mil wide), RoHS-compliant, lead-free, green (halogen/antimony-free).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A | Single-ended clock input | 5V-tolerant TTL/CMOS-compatible input with <6pF capacitance; accepts 0.8V–5.0V logic levels. |
| B0–B9 | CMOS clock outputs | 10 rail-to-rail buffered outputs, each with internal 22Ω series resistor for controlled impedance drive. |
| VCC | Power supply | 3.3V ±10% supply pin; multiple VCC pins distributed across package to reduce power rail noise coupling. |
| GND | Ground reference | Multiple GND pins interleaved with VCC and outputs to minimize ground bounce and improve PSRR. |
Key Features
| Feature | Design Value |
|---|---|
| Very low output skew | <200ps between any two outputs ensures deterministic setup/hold timing across multi-FPGA clock domains. |
| Integrated series damping | 22Ω per output eliminates need for external termination resistors and saves PCB area in dense routing. |
| Rail-to-rail CMOS outputs | VOH ≥2.4V / VOL ≤0.5V at 3.3V enables direct interfacing with 3.3V logic families without level translation. |
| 5V-tolerant input | Accepts 5V logic signals without damage or external clamping-simplifies integration with legacy microcontrollers. |
| Low quiescent current | <30µA ICC - critical for always-on timing subsystems in battery-backed industrial gateways. |
Applications
| Industrial PLC Backplane Clocking | FPGA Configuration Clock Distribution |
|---|---|
Use Scenario: Distributing a master clock across 10 I/O modules in a modular programmable logic controller rack. IC Role / Device Role / Timing Role: Fanout buffer providing synchronized, low-skew copies of 50MHz system clock to isolated module slots. Use Value: Sub-200ps skew prevents inter-module timing violations during high-speed data acquisition cycles. |
Use Scenario: Driving configuration clocks to 10 Xilinx Spartan-7 FPGAs on a single carrier board. IC Role / Device Role / Timing Role: Single-source clock repeater ensuring simultaneous bitstream load initiation across all devices. Use Value: Integrated 22Ω termination eliminates trace-length matching requirements and reduces layout complexity. |
| Legacy CPU Bus Timing | Industrial Ethernet PHY Synchronization |
Use Scenario: Generating 33MHz PCI clock and 66MHz AGP clock from a common oscillator in an industrial PC motherboard. IC Role / Device Role / Timing Role: Dual-frequency clock fanout via external divider chains fed from one PI49FCT32807QE output bank. Use Value: Low propagation delay (<2.5ns) preserves setup time margins for address/data latching on legacy buses. |
Use Scenario: Providing aligned 25MHz reference clocks to four dual-port Ethernet PHYs (e.g., KSZ9031) in a DIN-rail switch. IC Role / Device Role / Timing Role: Precision clock distributor delivering matched-phase clocks to PHY REF_CLK inputs. Use Value: Guaranteed tSK(O) ≤200ps meets IEEE 802.3 clause 40 jitter accumulation limits for multi-PHY systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar clock buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT 5V991A-10JGI | 10-output, 3.3V LVTTL buffer; no integrated series resistors; higher skew (350ps); requires external termination. | Suitable for lower-frequency (<80MHz) systems where board space allows discrete 33Ω resistors. | Select when cost sensitivity outweighs layout simplification and skew budget is relaxed. |
| ON Semi NB3N3010MNR2G | 10-output, 3.3V LVCMOS buffer; 250ps skew; no 5V-tolerant input; 1.8V–3.6V supply range. | Preferred for mixed-voltage designs with 1.8V/2.5V/3.3V domains but incompatible with 5V control logic. | Choose only if upstream clock source is strictly 3.3V and no 5V interface exists in the signal chain. |
Compared with IDT 5V991A-10JGI and ON Semi NB3N3010MNR2G, the PI49FCT32807QE uniquely combines 5V-tolerant input, integrated 22Ω termination, and <200ps skew-making it optimal for industrial backplanes where legacy compatibility, layout efficiency, and tight timing budgets coexist.
Availability
PI49FCT32807QE is available at Aetrix Electronics and suitable for industrial PLC backplane clocking, FPGA configuration distribution, and legacy CPU bus timing requiring stable component supply and long-term lifecycle support.
Supply support for PI49FCT32807QE 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design centers across Asia and manufacturing in certified ISO/TS 16949 and IATF 16949 facilities.
The PI49FCT32807QE belongs to Diodes' high-performance clock buffer product line, engineered specifically for low-skew, low-noise clock distribution in industrial and communications infrastructure where deterministic timing and robust ESD immunity (2kV HBM) are mandatory.
FAQ
Can the PI49FCT32807QE operate with a 2.5V supply?
No. The PI49FCT32807QE is specified only for 3.3V ±10% operation (2.97V–3.63V). At 2.5V, VOH drops below 2.0V and VOL rises above 0.6V, violating CMOS logic thresholds and risking unreliable switching in downstream receivers. The device lacks 2.5V operational mode support in its electrical characteristics table.
Is the 5V-tolerant input protected against continuous 5V DC application?
Yes. The input structure includes internal clamp diodes rated for continuous 5V DC application per the Absolute Maximum Ratings table. VIH is guaranteed up to 5.0V, and IIH remains within ±1µA at VIN = 5.0V, confirming safe long-term operation without external protection circuitry.
What is the maximum recommended trace length for B0–B9 outputs without external termination?
With the integrated 22Ω series resistor, traces up to 10 cm (4 inches) on FR-4 with 50Ω characteristic impedance maintain <10% overshoot at 133MHz. Beyond that length, reflection-induced jitter increases beyond the 200ps skew specification; external 33Ω series resistors are advised for >15 cm runs.
Does the PI49FCT32807QE support spread-spectrum clocking (SSC)?
No. The device has no SSC modulation capability or associated control pins. It is a fixed-frequency, zero-delay buffer optimized for deterministic phase alignment-not jitter reduction via frequency modulation. For SSC applications, a dedicated spread-spectrum clock generator must precede this buffer.
PI49FCT32807QE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- 49FCT
- Package/Case:
- 20-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- Fanout Buffer (Distribution)
- Number of Circuits:
- 1
- Ratio - Input:Output:
- 1:10
- Differential - Input:Output:
- No/No
- Input:
- CMOS
- Output:
- CMOS
- Frequency - Max:
- 133 MHz
- Voltage - Supply:
- 2.97V ~ 3.63V
- Operating Temperature:
- -40°C ~ 85°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 20-QSOP
PI49FCT32807QE FAQ
1.How can I place an order for PI49FCT32807QE through Aetrix?
Please submit a Request for Quotation (RFQ) for PI49FCT32807QE 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 PI49FCT32807QE reliable?
The price and inventory of PI49FCT32807QE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI49FCT32807QE is usually 5 days.
3.What payment methods are accepted for PI49FCT32807QE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI49FCT32807QE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI49FCT32807QE?
PI49FCT32807QE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI49FCT32807QE 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 PI49FCT32807QE?
For technical support, including PI49FCT32807QE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI49FCT32807QE requirements.
6.How does Aetrix verify that PI49FCT32807QE is sourced from the original manufacturer or authorized distributors?
All PI49FCT32807QE 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 PI49FCT32807QE meets industry standards.
7.What is the process for return or replacement of PI49FCT32807QE?
All PI49FCT32807QE units undergo pre-shipment inspection (PSI). If there is an issue with PI49FCT32807QE, 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 PI49FCT32807QE part is unused and in its original packaging.
Return procedure for PI49FCT32807QE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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