PCA9616PW,118 - 3-Ch Differential I2C Bus Buffer | NXP
料号： PCA9616PW,118 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $3.63 | $3.63 |
| 10 | $3.27 | $32.70 |
| 100 | $2.91 | $291.00 |
| 500 | $2.62 | $1,310.00 |
| 1,000 | $2.36 | $2,360.00 |
PCA9616PW,118 概述
A differential I2C-bus (dI2C) buffer is a signal repeater/redriver that converts the conventional open-drain, single-ended SDA and SCL lines into robust differential signals for transmission over long cables or through electrically harsh environments. Within the signal-chain hierarchy, it belongs to interface ICs -> bus buffers/repeaters -> I2C-bus buffers, and it sits between single-ended SMBus/I2C hosts and devices located meters away.
Key features include three independent differential channels for multipoint (multi-drop) bus topologies, automatic signal direction detection requiring no external direction-control signal, and hot-swap logic that isolates the live backplane from insertion transients. Cables can be extended to at least 3 m, or longer at reduced clock speeds, while remaining compatible with Standard-mode, Fast-mode, and Fast-mode Plus (up to 1 MHz) devices on the single-ended side.
Architecturally, the PCA9616 pairs each single-ended side buffer with an internal differential driver/receiver pair, providing common-mode noise rejection that ordinary I2C repeaters cannot achieve in noisy industrial environments. The dual-supply design lets a 3.3 V differential domain connect to 5 V or mixed-voltage single-ended rails.
Typical applications include backplane and rack-mounted card cages, industrial control networks in high-EMI areas, telecom chassis management (SMBus/PMBus domains), and LED signage or display clusters where I2C must traverse long ribbon or twisted-pair cable.
For design, use twisted-pair or Cat-5 cable for each differential pair, and observe the differential-side supply requirement; hot-swap isolation makes the part suitable for live insertion.
This page synthesizes distributor pricing, pinout guidance, drop-in alternative analysis, and design notes not found in the manufacturer datasheet alone.
直接替换替代料： PCA9616PW,118 ——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： PCA9616PW,118 （相同外形与封装尺寸）.
快速对比工具——选择替代料号进行并排对比：
该产品暂无直接替换替代料。
请求替代料PCA9616PW,118 规格参数
| 功能 | 3-channel multipoint Fm+ differential I2C-bus buffer with hot-swap logic |
| Number of Channels | 3 |
| Maximum Data Rate | 1 MHz (Fast-mode Plus) |
| Supported Bus Modes | Standard-mode, Fast-mode, Fast-mode Plus, SMBus |
| Protocol | dI2C (differential I2C-bus) |
| Signal Direction Control | Automatic, no external control required |
| Hot-Swap Logic | Yes |
| Supply Type | Dual supply |
| 工作温度 | -40C to +85C |
| 安装类型 | Surface Mount |
| 封装 / 外壳 | 16-TSSOP (0.173 in, 4.40 mm width), SOT402-1 |
| Supplier Device Package | 16-TSSOP |
| Cable Length Supported | At least 3 m (longer at lower clock speeds) |
| Packaging | SMD, reel (suffix ,118) |
| RoHS 状态 | Compliant |
| Single-Ended Side Compatibility | Existing SMBus / I2C-bus devices |
PCA9616PW,118 16-tssop 引脚配置指南
PCA9616PW,118（16-tssop 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： PCA9616PW,118.
请参阅 数据手册 以查看完整引脚配置。
典型应用
PCA9616PW,118 适用于 6 应用s: Industrial Backplane and Card Cage Bus Extension, Telecom and Server Chassis Management, LED Display and Signage Clusters, Factory Automation and Motor Drive Cabinets, Point-of-Sale and Security Panel Distributed Sensing, Automotive and Transportation Infotainment Harnesses.
Industrial Backplane and Card Cage Bus Extension
The PCA9616PW,118 is well suited to rack-mounted industrial backplanes where an I2C management bus must reach multiple slot cards over tens of centimeters of backplane trace. Its three independent differential channels support multipoint (multi-drop) topologies, letting several cards tap the same bus segment, while differential dI2C signaling rejects the common-mode noise generated by switching power supplies and motor drives sharing the chassis. The hot-swap logic permits inserting or removing cards from the live backplane without corrupting ongoing bus transactions or latch-up of connected devices. In a typical design, a 3.3 V SMBus master connects to the single-ended side, and each differential pair routes through the backplane connector to per-card PCA9616 receivers, sustaining Fast-mode Plus rates up to 1 MHz across the full cage.
推荐
Telecom and Server Chassis Management
In telecom shelves and server chassis, a PMBus/SMBus management domain often spans multiple line cards and power modules connected by cable harnesses in a high-EMI environment. The PCA9616PW,118 bridges the single-ended management bus on the shelf controller to differential dI2C pairs distributed through the chassis, extending the bus over cable runs of at least 3 m as documented by NXP, with longer reach achievable at reduced clock speeds. Automatic signal direction requires no software overhead from the management controller, and hot-swap logic allows live replacement of line cards or fan/power modules during service. Its dual-supply design interfaces 3.3 V controllers with 5 V peripheral management ICs, and Fast-mode Plus operation up to 1 MHz supports fast telemetry polling of PMBus power supplies across the shelf.
推荐
LED Display and Signage Clusters
Large LED signage, video hoardings, and stage displays distribute I2C control buses across panels separated by meters of ribbon or twisted-pair cable in an electrically noisy switching environment. The PCA9616PW,118 converts the controller's single-ended I2C bus into differential signals that survive the long runs, maintaining Standard-mode through Fast-mode Plus (1 MHz) communication to PWM LED driver ICs and I/O expanders on each panel. NXP datasheet guidance confirms at least 3 m cable extension, and the multipoint three-channel architecture lets one differential trunk serve multiple panels with taps along its length, reducing cabling complexity. Differential common-mode rejection prevents flicker-inducing bus errors from adjacent switch-mode LED drivers, and hot-swap capability allows a failed panel to be replaced without powering down the whole sign.
推荐
Factory Automation and Motor Drive Cabinets
Factory automation cabinets pack variable-frequency drives, contactors, and sensors that radiate significant EMI onto nearby control wiring. The PCA9616PW,118 lets an I2C-based sensor or supervisory bus cross this noisy volume by converting to differential dI2C signaling with strong common-mode rejection, a capability single-ended repeaters cannot match. Its -40C to +85C industrial temperature rating suits cabinet and machine-mount installations, and the automatic direction control removes any need for the PLC or supervisory MCU to manage repeater handshakes. Cable runs of at least 3 m, extendable at lower clock rates, connect remote operator panels, door-mounted HMIs, and sensor junction boxes to the main controller. Hot-swap logic supports maintenance interventions on powered cabinets without bus lockup, improving serviceability of distributed I2C nodes.
推荐
Point-of-Sale and Security Panel Distributed Sensing
Security panels, access-control cabinets, and point-of-sale enclosures frequently route an I2C sensing bus between a main controller board and door sensors, keypads, and tamper switches housed in separate enclosures joined by cable. The PCA9616PW,118 extends that bus differentially over the inter-enclosure cabling, preserving data integrity in the presence of solenoid, relay, and switching-supply transients typical of such systems. Because the dI2C buffers are transparent to Standard, Fast, and Fast-mode Plus traffic, existing firmware and I/O expander addressing schemes remain unchanged. The three multipoint channels allow one trunk to serve multiple door modules, and hot-swap logic permits a replacement keypad or reader module to be connected with the system powered. Cable extension of at least 3 m per NXP datasheet covers typical enclosure-to-enclosure distances comfortably.
推荐
Automotive and Transportation Infotainment Harnesses
In transportation and commercial-vehicle applications, an I2C control bus often must traverse wiring harnesses running alongside power distribution, ignition switching, and RF equipment. The PCA9616PW,118 provides differential dI2C extension across such harness sections, using common-mode noise rejection to keep I2C communication to display modules, light sensors, and I/O expanders error-free. Its 1 MHz Fast-mode Plus capability supports responsive touch and display control links, while lower-speed operation extends usable cable length beyond the 3 m baseline documented by NXP. The wide -40C to +85C ambient rating covers cabin and compartment environments, and the compact 16-TSSOP surface-mount package fits dense module PCBs. For designs requiring full AEC-Q100 qualification, verify the appropriate automotive-grade ordering variant with NXP before release.
推荐
推荐产品汇总
工程参考数据： PCA9616PW,118 ——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 | PCA9617ADPJ |
|---|---|---|
| Package | 16-TSSOP (SOT402-1) | VSO20 (DPJ) - NOT the same package |
| Brand | NXP Semiconductors | NXP Semiconductors |
| Number of Differential Channels | 3 (multipoint) | 1 |
| Drop-In Replaceable | n/a | No - requires PCB redesign |
关键差异点
- Three independent differential channels for multipoint buses （对比 PCA9617ADPJ)
- Hot-swap logic for live board insertion （对比 PCA9617ADPJ)
- No external direction control required （对比 PCA9617ADPJ)
设计说明
Route each dSDA/dSCL differential pair as a tightly coupled pair (ideally 100-ohm differential impedance over controlled-geometry runs) and use twisted-pair or Cat-5 cabling for off-board segments, matching each pair with its own return. Keep the single-ended side pull-up resistors sized per I2C standard-mode/Fast-mode Plus loading; on the single-ended side the PCA9616 presents buffer loading, so recalculate pull-up values for total bus capacitance rather than copying the master board's values.
The PCA9616 is a dual-supply device: decouple the single-ended side and the differential side independently with 100 nF ceramic capacitors placed within 2 mm of the respective VDD pins, plus bulk 4.7-10 uF per rail. Because all three differential channels can switch simultaneously at 1 MHz, budget the differential supply for the aggregate dynamic current, not just one channel's, and verify the supply droop stays within the datasheet recommended operating range at maximum load.
Estimated: NXP documents at least 3 m of cable at full speed, with longer runs requiring reduced clock rates - do not assume 1 MHz Fast-mode Plus over 10 m of cable; verify timing margin empirically with a scope on the dI2C pairs, checking eye width against the 1 MHz period. Also confirm that every node on a multipoint segment has its own PCA9616 buffer; mixing single-ended stubs longer than a few centimeters into a differential segment reintroduces the noise susceptibility the part is meant to eliminate.
合规信息
RoHS compliance and lead-free status per NXP ,118 ordering suffix and distributor listings (DigiKey, Newark). REACH, halogen-free, and conflict-minerals declarations should be confirmed via the current NXP product status page.
