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Renesas 49FCT3805DPYGI8
- Part No.:
- 49FCT3805DPYGI8
- Manufacturer:
- Renesas
- Category:
- Clock Buffers, Drivers
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
49FCT3805DPYGI8.pdf
- Description:
- IC CLK BUFFER 1:5 166MHZ 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,544
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Product details
Overview
49FCT3805DPYGI8 from Renesas Electronics (formerly IDT) is a 3.3V CMOS dual 1-to-5 clock driver with two independent output banks, each featuring active-low 3-state enable control, a 166MHz max input frequency, <2.5ns propagation delay, and <200ps output skew. It serves as a high-fidelity clock distribution IC in industrial timing systems requiring low-jitter fanout.
For engineers reviewing the 49FCT3805DPYGI8 datasheet, 49FCT3805DPYGI8 pinout, 49FCT3805DPYGI8 application, or 49FCT3805DPYGI8 equivalent, key selection criteria include bank-isolated enable control, MON "heartbeat" diagnostic output, TTL-compatible I/O, and SSOP-20 package compatibility for space-constrained PCB layouts.
Technical Context
The 49FCT3805DPYGI8 implements two fully independent clock distribution paths-Bank A (INA → OA1–OA5) and Bank B (INB → OB1–OB5)-each with dedicated OEA/OEB enables and identical electrical performance. Its MON output replicates any enabled bank's signal for PLL monitoring or system-level diagnostics without loading the primary outputs.
Designed for industrial temperature operation (−40°C to +85°C), the device supports mixed-voltage interfacing: inputs accept 3.3V or 5V logic levels, while outputs drive TTL loads at VCC = 3.3V ±0.3V. Propagation delay matching (tSK(O) ≤ 200ps) and pulse skew (≤270ps) are production-tested per the 3805E speed grade.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | VCC = 3.3V ±0.3V - ensures stable operation across industrial voltage tolerances |
| Max Input Frequency | 166MHz - supports high-speed clock distribution up to PCI-X and early DDR memory interfaces |
| Propagation Delay | tPLH/tPHL ≤ 2.5ns - enables sub-nanosecond timing margin in synchronous bus designs |
| Output Skew (tSK(O)) | ≤200ps - guarantees tight phase alignment across all five outputs within one bank |
| Input/Output Compatibility | TTL-compatible I/O - allows direct interfacing with legacy 5V logic without level shifters |
| Operating Temperature | −40°C to +85°C - qualified for industrial control, telecom infrastructure, and embedded computing |
| Monitor Output | MON replicates enabled bank output - provides non-invasive clock health verification for watchdog or PLL lock detection |
Pinout & Package
49FCT3805DPYGI8 is housed in a 20-pin Shrink Small Outline Package (SSOP), 0.209" body width, 0.025" lead pitch, JEDEC MO-153 compliant. Pin 10 is GNDQ (quiet ground), physically isolated to minimize switching noise coupling into sensitive analog or reference domains.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INA, INB | Primary clock inputs | Differential-capable single-ended inputs accepting 3.3V or 5V logic; low capacitance (CIN ≤ 4pF) minimizes source loading |
| OEA, OEB | Active-low 3-state enables | Independent bank control: pulling OEA low enables OA1–OA5; OEB controls OB1–OB5; high-impedance state isolates outputs during power sequencing |
| OA1–OA5, OB1–OB5 | CMOS clock outputs | Each bank delivers matched, low-skew copies of its input; capable of driving 50Ω transmission lines or TTL loads |
| MON | Monitor output | Electrically identical to OA/OB outputs; used for real-time clock integrity checks without adding load to functional outputs |
| VCCA, VCCB | Separate power pins per bank | Enables independent power domain management; reduces crosstalk between banks and supports partial power-down |
| GNDQ | Quiet ground | Dedicated ground pin (Pin 10) for analog-sensitive circuitry; must be connected to clean system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 1:5 fanout banks | Enables simultaneous distribution of two asynchronous clocks (e.g., CPU and peripheral domains) with no inter-bank timing dependency |
| Production-tested 200ps output skew | Ensures deterministic phase alignment across all five outputs in a bank-critical for SDRAM address/command bus timing |
| "Heartbeat" MON output | Provides a live, unloaded copy of enabled bank output for PLL lock detection or FPGA configuration clock validation |
| TTL-compatible I/O at 3.3V supply | Eliminates need for external level translators when interfacing with legacy 5V controllers or buffers |
| Low dynamic current (ICCD = 80–120 µA/MHz) | Reduces power supply ripple and thermal load in high-frequency multi-output configurations |
Applications
| Industrial PLC Backplane Clocking | Telecom Line Card Timing Distribution |
|---|---|
Use Scenario: Distributing synchronized clock signals across multiple I/O modules in a programmable logic controller rack with strict skew requirements. IC Role / Device Role / Timing Role: Dual-bank clock driver providing isolated 166MHz clocks to CPU, FPGA, and ADC/DAC subsystems on separate backplane segments. Use Value: ≤200ps intra-bank skew ensures setup/hold compliance across distributed modules; MON output validates clock presence before firmware initialization. | Use Scenario: Driving parallel SERDES lanes and framer interfaces on a telecom line card where jitter accumulation must be minimized. IC Role / Device Role / Timing Role: Low-skew clock repeater feeding multiple PHY devices from a single oscillator or PLL output. Use Value: Matched tPLH/tPHL and <270ps pulse skew preserve signal integrity across 5-lane data paths; SSOP-20 footprint fits dense line card layouts. |
| Embedded Computing Memory Interface | Test Equipment Pattern Generator Sync |
Use Scenario: Generating tightly aligned address/control clocks for DDR1/DDR2 memory subsystems in ruggedized edge computing platforms. IC Role / Device Role / Timing Role: Fanout buffer delivering phase-coherent clocks to DRAM chips and memory controller I/O blocks. Use Value: VCCA/VCCB separation prevents noise coupling between memory and control domains; GNDQ pin reduces jitter induced by digital switching transients. | Use Scenario: Synchronizing multiple arbitrary waveform generators or logic analyzers in automated test equipment racks. IC Role / Device Role / Timing Role: Reference clock distributor ensuring nanosecond-level trigger alignment across instruments. Use Value: MON output feeds a system-wide "clock OK" indicator; 166MHz capability supports high-resolution pattern generation up to 100+ MHz data rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar clock driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ICS553M-01LFT | Single 1:5 bank, no MON output, 133MHz max frequency, SOIC-16 package | Lacks dual-bank isolation and monitor functionality; suitable only for single-clock systems | Select when cost and board space constrain design and dual-clock operation is unnecessary |
| PI6C20400LEX | LVCMOS outputs, 200MHz max, 2.5V/3.3V selectable supply, TSSOP-20 package | Higher frequency but incompatible TTL input thresholds; requires 3.3V-only source logic | Choose for next-gen low-voltage systems where 5V-tolerant inputs are not required |
Compared with ICS553M-01LFT and PI6C20400LEX, the 49FCT3805DPYGI8 uniquely combines dual independent banks, TTL-compatible inputs, MON output, and industrial-grade 200ps skew in an SSOP-20 package-making it optimal for legacy-aware, multi-domain clocking where signal fidelity and diagnostic visibility are critical.
Availability
49FCT3805DPYGI8 is available at Aetrix Electronics and suitable for industrial PLC backplanes, telecom line cards, embedded memory interfaces, and test equipment synchronization requiring stable component supply and long-term industrial lifecycle support.
Supply support for 49FCT3805DPYGI8 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
Renesas Electronics Corporation is a global semiconductor leader delivering microcontrollers, analog, power, and timing solutions for automotive, industrial, and infrastructure markets.
The 49FCT3805DPYGI8 belongs to Renesas' legacy IDT timing portfolio, engineered specifically for high-reliability, low-skew clock distribution in industrial and telecom systems where signal integrity and mixed-voltage interoperability are essential.
FAQ
What is the maximum operating frequency supported by the 49FCT3805DPYGI8?
The 49FCT3805DPYGI8 supports a maximum input frequency of 166MHz, verified under industrial temperature conditions (−40°C to +85°C) with CL = 15pF. This rating applies to both INA and INB inputs independently, enabling full utilization of the dual-bank architecture for high-speed synchronous systems such as DDR memory controllers and packet-processing line cards.
Does the 49FCT3805DPYGI8 support 5V-tolerant inputs?
Yes, the 49FCT3805DPYGI8 accepts 5V logic levels on INA and INB inputs while operating at VCC = 3.3V, per its VIH specification (up to 5.5V) and VIL (down to −0.5V). This allows seamless integration with legacy 5V controllers or level-shifter-free interfacing in mixed-voltage industrial systems without compromising timing performance.
What is the function of the MON pin on the 49FCT3805DPYGI8?
The MON pin on the 49FCT3805DPYGI8 provides a buffered, electrically identical copy of whichever output bank (A or B) is currently enabled via OEA or OEB. It is designed for non-invasive clock health monitoring-e.g., feeding a PLL lock detector or FPGA configuration status register-without adding capacitive load to the functional OA/OB outputs.
Is the 49FCT3805DPYGI8 pin-compatible with the 49FCT3805EPYGI8?
No-the 49FCT3805DPYGI8 and 49FCT3805EPYGI8 share identical pinout and package (SSOP-20), but differ in speed grade: the 'D' version is rated to 133MHz with 3ns max propagation delay, while the 'E' version (including 49FCT3805DPYGI8's datasheet revision) is rated to 166MHz with ≤2.5ns delay and ≤200ps skew. They are not drop-in replacements without timing validation.
How should the GNDQ pin (Pin 10) be connected on the 49FCT3805DPYGI8?
The GNDQ (quiet ground) pin on the 49FCT3805DPYGI8 must be connected directly to a clean, low-noise ground plane-preferably separate from noisy digital ground returns-and tied to VCCA/VCCB ground at a single point near the device. This isolation minimizes switching noise coupling into timing-critical paths, preserving the ≤200ps output skew specification.
49FCT3805DPYGI8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 49FCT
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Fanout Buffer (Distribution)
- Number of Circuits:
- 2
- Ratio - Input:Output:
- 1:5
- Differential - Input:Output:
- No/No
- Input:
- CMOS, LVTTL
- Output:
- CMOS, LVTTL
- Frequency - Max:
- 166 MHz
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 20-SSOP
49FCT3805DPYGI8 FAQ
1.How can I place an order for 49FCT3805DPYGI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 49FCT3805DPYGI8 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 49FCT3805DPYGI8 reliable?
The price and inventory of 49FCT3805DPYGI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 49FCT3805DPYGI8 is usually 5 days.
3.What payment methods are accepted for 49FCT3805DPYGI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 49FCT3805DPYGI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 49FCT3805DPYGI8?
49FCT3805DPYGI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 49FCT3805DPYGI8 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 49FCT3805DPYGI8?
For technical support, including 49FCT3805DPYGI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 49FCT3805DPYGI8 requirements.
6.How does Aetrix verify that 49FCT3805DPYGI8 is sourced from the original manufacturer or authorized distributors?
All 49FCT3805DPYGI8 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 49FCT3805DPYGI8 meets industry standards.
7.What is the process for return or replacement of 49FCT3805DPYGI8?
All 49FCT3805DPYGI8 units undergo pre-shipment inspection (PSI). If there is an issue with 49FCT3805DPYGI8, 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 49FCT3805DPYGI8 part is unused and in its original packaging.
Return procedure for 49FCT3805DPYGI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
49FCT3805DPYGI8 Tags
-
PL133-37TC-R
Microchip Technology
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PL133-27GC-R
Microchip Technology
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LMK1C1102DQFR
Texas Instruments
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LMK1C1102PWR
Texas Instruments
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LMK1C1104DQFR
Texas Instruments
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LMK1C1104PWR
Texas Instruments
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CDC3RL02YFPR
Texas Instruments
-
SY75602ATWL-TR
Microchip Technology
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SY75603ATWL-TR
Microchip Technology
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5PB1102CMGI8
Renesas
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PL133-27GI-R
Microchip Technology
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551MLFT
Renesas
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