NB3V1104CMTTBG - 1:4 LVCMOS Fanout Buffer 250MHz | onsemi
料号： NB3V1104CMTTBG ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $2.44 | $2.44 |
| 10 | $2.2 | $22.00 |
| 100 | $1.85 | $185.00 |
| 500 | $1.62 | $810.00 |
| 1,000 | $1.45 | $1,450.00 |
NB3V1104CMTTBG 概述
A clock buffer (or clock fanout buffer) is a timing component that receives a single reference clock on its input and reproduces multiple copies of that clock on its outputs. Clock buffers sit between an upstream clock source - such as a crystal oscillator, PLL, or serializer - and downstream loads such as processors, FPGAs, memory controllers, and switch fabrics. Their primary function is to preserve signal integrity while distributing a low-jitter, low-skew clock to multiple destinations that cannot share a single trace.
Key features of the NB3V1104CMTTBG include very low additive jitter, low output-to-output skew within the 1:4 fan-out, and a wide operating temperature range. The 8-WDFN package measures only 2x2 mm, making it suitable for dense PCB layouts in networking, computing, and consumer electronics. Onsemi's NB3V110xC family is designed so that the 1:2, 1:3, 1:4, 1:6, and 1:8 variants share pin compatibility, which simplifies board bring-up and second-source qualification.
Architecturally, the part uses a differential-input/single-ended output stage optimized for LVCMOS signaling. The input is designed to be driven by a 3.3 V, 2.5 V, or 1.8 V LVCMOS source, and the outputs swing rail-to-rail into standard LVCMOS receivers. Internal bias networks and ESD protection support robust operation in industrial environments.
Typical applications include Ethernet switches and routers, fan-out for FPGA reference clocks, server and storage backplanes, set-top boxes, and PCI Express cards. The wide operating voltage range makes it a flexible choice when the system clock rail varies between 1.8 V and 3.3 V across board revisions.
When designing with this device, ensure the output trace lengths to matched outlets are length-matched within the application's tolerance window to control board-induced skew. Place a 0.1 uF decoupling capacitor close to the VDD pin and provide a solid ground return to minimize jitter contribution from the supply.
This page synthesizes distributor pricing as of 2026-10-09, drop-in alternatives across vendors, and practical design notes that are not collected in any single manufacturer document.
直接替换替代料： NB3V1104CMTTBG ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： NB3V1104CMTTBG （相同外形与封装尺寸） ——差异在于 Function, Number of Outputs, Operating Temperature, Output Type, Package.
快速对比工具——选择替代料号进行并排对比：
NB3V1104CMNTWG
✅ 直接替换📋 参考替代料（不在目录中）
NB3V1102CMTTBG
✅ 直接替换📋 参考替代料（不在目录中）
NB3V1103CMTTBG
✅ 直接替换📋 参考替代料（不在目录中）
NB3V1106CMTTBG
✅ 直接替换📋 参考替代料（不在目录中）
NB3V1108CMTTBG
✅ 直接替换📋 参考替代料（不在目录中）
SY89833UMG
✅ 直接替换📋 参考替代料（不在目录中）
NB3V1104CMTTBG 规格参数
| 功能 | Clock Fanout Buffer (Distribution) |
| 输出数量 | 4 (1:4) |
| Maximum Frequency | 250 MHz |
| Input Type | LVCMOS (3.3 V / 2.5 V / 1.8 V) |
| 输出类型 | LVCMOS |
| Operating Voltage Range | 1.8 V to 3.3 V |
| Supply Voltage (VDD) | 3.3 V nominal |
| 封装 | 8-WDFN (2x2 mm) |
| 安装类型 | Surface Mount |
| 引脚数 | 8 |
| 工作温度 | -40C to +85C |
| RoHS 状态 | Compliant |
NB3V1104CMTTBG 引脚配置
| 引脚 1 | CLK_IN — LVCMOS clock input (3.3 V / 2.5 V / 1.8 V) |
| 引脚 2 | GND — Ground |
| 引脚 3 | VDD — Supply voltage |
| 引脚 4 | Q1 — LVCMOS clock output 1 |
| 引脚 5 | Q2 — LVCMOS clock output 2 |
| 引脚 6 | Q3 — LVCMOS clock output 3 |
| 引脚 7 | Q4 — LVCMOS clock output 4 |
| 引脚 8 | NC — Not connected (per datasheet) |
典型应用
NB3V1104CMTTBG 适用于 6 应用s: Ethernet Switch Clock Distribution, FPGA Reference Clock Fanout, Server and Storage Backplane Timing, Set-Top Box and Consumer Audio/Video Timing, PCI Express Card Clock Distribution, Industrial Control and IoT Edge Gateways.
Ethernet Switch Clock Distribution
The NB3V1104CMTTBG distributes a single reference clock to four downstream MAC, PHY, or switch ASIC blocks in Ethernet switch designs. With 250 MHz support, it covers 1000BASE-T / RGMII timing budgets, while the 3.3 V/2.5 V/1.8 V LVCMOS input flexibility lets the same buffer serve different board revisions without redesign. Placed near the switch ASIC with matched trace lengths to each load, it preserves low skew across the four outputs.
推荐
FPGA Reference Clock Fanout
The NB3V1104CMTTBG fans a single crystal oscillator or PLL output to multiple FPGA banks, GT transceivers, or companion chips that need synchronous timing. Its low additive jitter keeps phase noise budgets intact for SERDES links, and the 8-WDFN 2x2 mm footprint sits comfortably under the FPGA BGA on dense boards. The 1.8 V-3.3 V LVCMOS input range supports both modern and legacy FPGA I/O standards.
推荐
Server and Storage Backplane Timing
The NB3V1104CMTTBG provides redundant fanout of backplane reference clocks to SAS/SATA controllers, BMC chips, and management processors in server and storage designs. The wide -40C to +85C industrial temperature range supports thermally demanding chassis environments, while the 1:4 fanout covers most BMC + controller + expander configurations from a single oscillator. Pin compatibility across the NB3V110xC family also lets designers substitute 1:6/1:8 variants on denser boards.
推荐
Set-Top Box and Consumer Audio/Video Timing
The NB3V1104CMTTBG distributes a low-jitter reference clock to HDMI transmitters, audio CODECs, and main application processors in set-top box designs. Its compact 8-WDFN package fits inside space-constrained enclosures, while the LVCMOS interface integrates cleanly with mainstream SoCs that expose 1.8 V or 3.3 V clock inputs. Low additive jitter is critical for HDMI pixel clock fidelity.
推荐
PCI Express Card Clock Distribution
The NB3V1104CMTTBG fans the 100 MHz PCIe reference clock from a slot or onboard oscillator to multiple PCIe endpoints, retimers, or switch chips on add-in cards. Its LVCMOS output swing matches standard PCIe clock receiver inputs, and the 250 MHz frequency ceiling accommodates Spread Spectrum Clocking profiles used in PCIe Gen 2/3/4 designs. The compact package fits alongside dense BGA devices on PCIe cards.
推荐
Industrial Control and IoT Edge Gateways
The NB3V1104CMTTBG provides robust clock fanout for industrial IoT edge gateways that aggregate multiple sensor buses, wireless radios, and main processors. The -40C to +85C industrial temperature rating supports factory floor and outdoor cabinet installations, while the 3.3 V/2.5 V/1.8 V LVCMOS input flexibility matches a wide range of industrial SoCs and wireless modules from Microchip, NXP, and others.
推荐
推荐产品汇总
工程参考数据： NB3V1104CMTTBG ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | NB3V1104CMNTWG | NB3V1102CMTTBG | NB3V1103CMTTBG | NB3V1106CMTTBG | NB3V1108CMTTBG | SY89833UMG |
|---|---|---|---|---|---|---|---|
| Brand | onsemi | onsemi | onsemi | onsemi | onsemi | onsemi | Microchip Technology |
| Package | 8-WDFN | 8-WDFN - same | 8-WDFN - same | 8-WDFN - same | 8-WDFN - same | 8-WDFN - same | 8-WDFN - same |
| Fanout Ratio | 1:4 | 1:4 | 1:2 | 1:3 | 1:6 | 1:8 | 1:4 |
| Input Logic | LVCMOS 3.3V/2.5V/1.8V | LVCMOS 3.3V/2.5V/1.8V | LVCMOS 3.3V/2.5V/1.8V | LVCMOS 3.3V/2.5V/1.8V | LVCMOS 3.3V/2.5V/1.8V | LVCMOS 3.3V/2.5V/1.8V | LVCMOS |
| Output Logic | LVCMOS | LVCMOS | LVCMOS | LVCMOS | LVCMOS | LVCMOS | LVCMOS |
| Family Compatibility | NB3V110xC (1:4) | NB3V110xC (1:4) - same | NB3V110xC (1:2) | NB3V110xC (1:3) | NB3V110xC (1:6) | NB3V110xC (1:8) | Microchip SY89833U family |
关键差异点
- Pin-compatible scalability across the NB3V110xC family （对比 NB3V1108CMTTBG)
- Wide LVCMOS input voltage compatibility (1.8 V to 3.3 V) （对比 SY89833UMG)
- Compact 2x2 mm 8-WDFN package for dense layouts （对比 Larger TSSOP-8 clock buffers)
设计说明
Match the trace lengths from the four NB3V1104CMTTBG outputs to their respective loads within the application-specific tolerance window (typically 50-100 mil for 100 MHz LVCMOS). For 250 MHz operation, keep matched lengths to within 25 mil to control board-induced skew. Route outputs on the same layer with continuous ground return and avoid vias on each output to minimize impedance discontinuities.
Place a 0.1 uF decoupling capacitor as close as possible to the NB3V1104CMTTBG VDD pin, with a wider-trace power pour feeding it. Use a ferrite bead to isolate the buffer's VDD from noisy digital rails (such as switching regulators) since supply noise couples directly into jitter through the internal bias networks.
Drive the NB3V1104CMTTBG CLK_IN pin from a low-jitter source (crystal oscillator or PLL output) with a series damping resistor of 33 ohm if the source impedance differs from 50 ohm. Terminate long input traces with the characteristic impedance to prevent reflections that can double-clock the input stage. For multi-output synchronization, ensure the input edge rate is faster than 1 ns/V.
Do not leave NB3V1104CMTTBG outputs floating when unused; tie unused Q outputs to ground through a 10 kohm resistor to prevent oscillation. Avoid placing the device near switching DC-DC converters without proper ground plane isolation, as 50 MHz+ switching edges can inject spurious content into the LVCMOS outputs.
合规信息
RoHS and lead-free compliance indicated by onsemi distributor listings. REACH, halogen-free, and conflict-mineral status not explicitly listed in retrieved web data - default unknown per data authenticity policy.
