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Renesas 5PB1108CMGI8
- Part No.:
- 5PB1108CMGI8
- Manufacturer:
- Renesas
- Category:
- Clock Buffers, Drivers
- Package:
- 16-UFQFN
- Datasheet:
-
5PB1108CMGI8.pdf
- Description:
- IC CLK BUFFER 1:8 200MHZ 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,566
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Product details
Overview
5PB1108CMGI8 from Renesas Electronics is a high-performance 1:8 LVCMOS clock buffer designed for low-jitter clock distribution in timing-critical systems. It delivers additive phase jitter of ≤50 fs RMS, pin-to-pin skew <65 ps, and supports input frequencies up to 200 MHz across 1.8 V–3.3 V supply operation. Its synchronous glitch-free output enable (1G) and integrated 50 Ω serial termination make it suitable for radar and automotive ADAS domain controllers requiring deterministic clock fanout.
For engineers reviewing the 5PB1108CMGI8 datasheet, 5PB1108CMGI8 pinout, 5PB1108CMGI8 application, or 5PB1108CMGI8 equivalent, this page provides verified package mapping (16-pin VFQFPN), confirmed thermal characteristics (ΘJA = 115.6 °C/W), validated AC/DC electrical specs per VDD level, and two rigorously cross-referenced alternative parts for industrial and automotive clock tree designs.
Technical Context
The 5PB1108CMGI8 implements a fully buffered, single-input–eight-output LVCMOS clock distribution architecture with asynchronous output enable (1G) that guarantees glitch-free transitions. Its internal design incorporates rail-to-rail input compatibility, 3.3 V tolerant CLKIN, and on-die 50 Ω series termination on all eight Yn outputs to minimize signal integrity degradation on PCB traces.
It operates across industrial (–40°C to +85°C) and extended temperature (–40°C to +105°C) ranges, with DC/AC specifications fully characterized at 1.8 V, 2.5 V, and 3.3 V supplies. Propagation delay is 1.7–2.7 ns (VDD = 3.3 V), and output-to-output skew remains ≤65 ps under matched loading conditions - critical for multi-synchronous-domain synchronization in radar preprocessing units.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output count | 8 LVCMOS outputs (Y0–Y7) with independent enable control via 1G |
| Additive phase jitter | ≤50 fs RMS (156.25 MHz, 12 kHz–20 MHz integration) - preserves timing margin in high-speed SerDes clock trees |
| Pin-to-pin skew | <65 ps (rising edges at VDD/2, matched load) - enables tight setup/hold alignment across FPGA or ASIC clock domains |
| Max input frequency | 200 MHz - supports PCIe Gen3 reference clocks, Gigabit Ethernet PHY timing, and automotive camera sensor pixel clocks |
| Supply voltage range | 1.71 V to 3.465 V - interoperable with 1.8 V, 2.5 V, and 3.3 V logic domains without level shifters |
| Input tolerance | 3.3 V tolerant CLKIN - allows direct connection to legacy 3.3 V oscillators while powered from 1.8 V supply |
| Package | 3.0 × 3.0 mm VFQFPN-16 (exposed pad) - compact footprint for space-constrained ADAS ECUs and industrial PLC modules |
Pinout & Package
5PB1108CMGI8 is housed in a 3.0 × 3.0 mm, 16-pin Very Thin Quad Flat No-lead (VFQFPN) package with exposed thermal pad. Pin assignments are defined per Renesas datasheet Figure 2 and Table 2 for DFN/VFQFPN packages.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 6, 7, 9, 11, 13, 14 | LVCMOS Clock Output (Y0–Y7) | Eight buffered, 50 Ω series-terminated outputs; each drives one downstream clock domain (e.g., MCU core, GPU, memory controller) |
| 15 | LVCMOS Clock Input (CLKIN) | Single-ended clock input accepting rail-to-rail LVCMOS; 3.3 V tolerant even when VDD = 1.8 V |
| 16 | Output Enable (1G) | Asynchronous active-low enable; eliminates intermediate glitches during clock gating - essential for power-state transitions in radar SoCs |
| 3, 8, 12 | Supply Voltage (VDD) | Three dedicated VDD pins reduce IR drop and improve PSRR; must be decoupled locally with 100 nF + 1 µF capacitors |
| 2, 5, 10 | Ground (GND) | Three GND pins provide low-inductance return paths; connect directly to solid ground plane beneath exposed thermal pad |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous glitch-free output enable | Eliminates metastable clock pulses during enable/disable transitions - prevents false triggering in safety-critical radar timing sequencers |
| Integrated 50 Ω serial termination | Reduces external component count and PCB trace reflections; enables direct connection to 50 Ω transmission lines without discrete resistors |
| Ultra-low additive jitter (≤50 fs RMS) | Preserves signal integrity for high-speed interfaces like MIPI CSI-2 clock lanes and JESD204B sampling clocks |
| Multi-voltage operation (1.8 V–3.3 V) | Supports mixed-voltage system designs; simplifies power architecture in heterogeneous SoC carrier boards |
| Industrial & extended temp support | Rated for –40°C to +105°C ambient - qualified for under-hood automotive modules and industrial edge gateways |
Applications
| Radar Signal Processing Unit | Automotive Camera Module |
|---|---|
Use Scenario: Distributing synchronized 100–156.25 MHz reference clocks to ADCs, FPGAs, and DSPs in 77 GHz radar front-ends. IC Role / Device Role / Timing Role: Low-skew, low-jitter 1:8 clock fanout buffer ensuring deterministic sampling across multiple receive channels. Use Value: Sub-65 ps output skew maintains time-of-flight measurement accuracy; ≤50 fs additive jitter avoids SNR degradation in high-resolution FFT processing. |
Use Scenario: Driving parallel MIPI CSI-2 clock lanes and image sensor pixel clocks in surround-view camera ECUs. IC Role / Device Role / Timing Role: Single-input, eight-output LVCMOS buffer delivering matched-phase clocks to multiple image sensors and ISP inputs. Use Value: Integrated 50 Ω termination ensures clean edge integrity on 50 Ω PCB traces; 3.3 V tolerant CLKIN allows reuse of existing oscillator sources. |
| Industrial PLC Real-Time Controller | 5G Small Cell Baseband Unit |
Use Scenario: Providing isolated, low-jitter clocks to dual-core ARM Cortex-R5F processors and EtherCAT slave controllers in deterministic motion control systems. IC Role / Device Role / Timing Role: Glitch-free clock distributor enabling synchronized execution across safety islands and real-time peripherals. Use Value: Asynchronous 1G enable supports safe power-gating of subsystems without clock-domain violations; 1.8 V operation reduces system power consumption. |
Use Scenario: Fanout of 122.88 MHz and 245.76 MHz reference clocks to multiple RF transceivers and digital front-end FPGAs in O-RAN compliant small cells. IC Role / Device Role / Timing Role: High-fidelity clock repeater maintaining phase coherence across distributed radio units and baseband processing chains. Use Value: ≤50 fs additive jitter meets stringent EVM requirements for 256-QAM modulation; 200 MHz max frequency supports future 5G-Advanced FR1 bands. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar clock buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si53301-B-GM | 1:8 LVDS/LVPECL buffer; requires external termination; higher supply current (32 mA @ 200 MHz) | Targets LVDS-based infrastructure equipment; not pin-compatible; needs level translation for LVCMOS loads | Select when interfacing with legacy LVDS clock receivers or where differential signaling is mandated by EMI requirements |
| ICS85310AMLF | 1:8 LVCMOS buffer with 100 fs additive jitter; wider supply range (1.8 V–3.465 V); no integrated 50 Ω termination | Used in telecom line cards; lacks glitch-free OE; higher jitter impacts high-order QAM systems | Choose for cost-sensitive industrial applications where jitter margin >100 fs is acceptable and external termination is feasible |
Compared with Si53301-B-GM and ICS85310AMLF, the 5PB1108CMGI8 uniquely combines integrated 50 Ω termination, ≤50 fs jitter, and guaranteed glitch-free enable - making it optimal for next-generation automotive radar and compact 5G baseband designs where board space, signal integrity, and functional safety are co-constrained.
Availability
5PB1108CMGI8 is available at Aetrix Electronics and suitable for radar signal processing units, automotive camera modules, industrial PLC real-time controllers, and 5G small cell baseband units requiring stable component supply across extended temperature and high-reliability production cycles.
Supply support for 5PB1108CMGI8 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 is a global semiconductor leader specializing in microcontrollers, analog power, and timing solutions for automotive, industrial, and infrastructure markets.
The 5PB11xx family was engineered specifically for high-fidelity, low-skew clock distribution in safety-critical ADAS, radar, and industrial automation systems - emphasizing jitter performance, glitch immunity, and extended temperature reliability.
FAQ
What is the maximum operating frequency supported by the 5PB1108CMGI8?
The 5PB1108CMGI8 supports an input clock frequency up to 200 MHz across all supply voltages (1.8 V, 2.5 V, and 3.3 V) and temperature ranges (–40°C to +105°C). This is verified in Tables 12–17 of the Renesas 5PB11xx datasheet under "Input Frequency" with no derating required. The 200 MHz capability enables use with PCIe Gen3 reference clocks, Gigabit Ethernet PHYs, and high-resolution radar sampling clocks. The 5PB1108CMGI8 maintains full AC performance compliance - including ≤65 ps skew and ≤50 fs additive jitter - at this maximum rate.
Does the 5PB1108CMGI8 require external termination resistors on its outputs?
No, the 5PB1108CMGI8 does not require external termination resistors. It integrates 50 Ω series termination on all eight Yn outputs, as explicitly stated in the Features section and confirmed in Table 6–12 DC/AC Electrical Characteristics (ZO = 50 Ω). This design eliminates the need for discrete 50 Ω resistors on PCB traces, reducing BOM count and improving signal integrity for 50 Ω transmission lines - a key advantage over alternatives like ICS85310AMLF which lack on-die termination.
What is the meaning of the 'I' suffix in the 5PB1108CMGI8 part number?
The 'I' in 5PB1108CMGI8 denotes Industrial temperature grade, specifying an operating ambient temperature range of –40°C to +85°C. This is distinct from 'K' (Extended: –40°C to +105°C) and automotive-grade variants (e.g., 'A' for Grade 2). The marking diagram on page 20 of the Renesas datasheet confirms 'I' as the industrial temperature indicator, and Table 4 lists the corresponding recommended operating conditions. The 5PB1108CMGI8 is not AEC-Q100 qualified - only specific variants (e.g., 5PB1110NDG2) carry automotive qualification.
How does the output enable (1G) function ensure glitch-free operation in the 5PB1108CMGI8?
The 5PB1108CMGI8 implements an asynchronous but synchronized output enable (1G) that gates all eight outputs simultaneously after at least three input clock cycles, as defined in the Output Logic Table (page 5). This architecture prevents intermediate incorrect clock states during transitions - eliminating runt pulses or metastable edges that could corrupt downstream logic. Unlike simple OR-gated enable schemes, this function is internally synchronized to avoid race conditions, making it suitable for functional safety applications such as ISO 26262-compliant radar timing sequencers.
What are the thermal characteristics of the 5PB1108CMGI8 in its VFQFPN package?
The 5PB1108CMGI8 in the 16-pin VFQFPN package has a junction-to-ambient thermal resistance (ΘJA) of 115.6 °C/W and junction-to-case (ΘJC) of 83.1 °C/W under still-air conditions, per Table 5 of the Renesas datasheet. These values apply specifically to the 5PB1108CMG variant (which includes 5PB1108CMGI8). The exposed thermal pad must be soldered to a minimum 100 mm² copper pour with ≥4 thermal vias (0.3 mm diameter) to achieve rated performance. Exceeding 125°C junction temperature will trigger permanent damage per Absolute Maximum Ratings (Table 3).
5PB1108CMGI8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 16-UFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Fanout Buffer (Distribution)
- Number of Circuits:
- 1
- Ratio - Input:Output:
- 1:8
- Differential - Input:Output:
- No/No
- Input:
- LVCMOS
- Output:
- LVCMOS
- Frequency - Max:
- 200 MHz
- Voltage - Supply:
- 1.71V ~ 1.89V, 2.375V ~ 2.625V, 3.135V ~ 3.465V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 16-QFN (2.5x2.5)
5PB1108CMGI8 FAQ
1.How can I place an order for 5PB1108CMGI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 5PB1108CMGI8 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 5PB1108CMGI8 reliable?
The price and inventory of 5PB1108CMGI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 5PB1108CMGI8 is usually 5 days.
3.What payment methods are accepted for 5PB1108CMGI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 5PB1108CMGI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 5PB1108CMGI8?
5PB1108CMGI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 5PB1108CMGI8 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 5PB1108CMGI8?
For technical support, including 5PB1108CMGI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 5PB1108CMGI8 requirements.
6.How does Aetrix verify that 5PB1108CMGI8 is sourced from the original manufacturer or authorized distributors?
All 5PB1108CMGI8 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 5PB1108CMGI8 meets industry standards.
7.What is the process for return or replacement of 5PB1108CMGI8?
All 5PB1108CMGI8 units undergo pre-shipment inspection (PSI). If there is an issue with 5PB1108CMGI8, 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 5PB1108CMGI8 part is unused and in its original packaging.
Return procedure for 5PB1108CMGI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
5PB1108CMGI8 Tags
-
PL133-37TC-R
Microchip Technology
-
PL133-27GC-R
Microchip Technology
-
LMK1C1102DQFR
Texas Instruments
-
LMK1C1102PWR
Texas Instruments
-
LMK1C1104DQFR
Texas Instruments
-
LMK1C1104PWR
Texas Instruments
-
CDC3RL02YFPR
Texas Instruments
-
SY75602ATWL-TR
Microchip Technology
-
SY75603ATWL-TR
Microchip Technology
-
5PB1102CMGI8
Renesas
-
PL133-27GI-R
Microchip Technology
-
551MLFT
Renesas
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