PCA9614DP,118 - 2-Ch Fm+ Differential I2C Bus Buffer | NXP
N.º da peça: PCA9614DP,118 ✗ Fim de vida| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $3.51 | $3,51 |
| 10 | $3.2 | $32,00 |
| 100 | $2.85 | $285,00 |
| 500 | $2.55 | $1.275,00 |
| 1.000 | $2.3 | $2.300,00 |
PCA9614DP,118 Visão geral
An I2C-bus buffer and repeater is an interface IC that regenerates and drives bus signals, increasing fan-out, breaking capacitance limits, and lengthening bus reach. Within the interface IC hierarchy, buffer ICs sit between an I2C master/peripheral and the physical wire, and differential buffers such as this one add a robust physical layer without changing the protocol, so standard controllers require no firmware changes.
Key features include two independent buffer channels supporting multipoint dI2C links over long cables, an EN pin that places the device in an idle state to stop traffic propagation, and an internal pull-up on EN that holds the device enabled by default. The differential transmission rejects common-mode noise, making the link tolerant of ground potential differences between boards.
Technically, the PCA9614 converts the single-ended SDA/SCL levels into a differential pair per channel at the buffer output side, and converts back to single-ended at the receiving end when paired with another differential buffer. Because the dI2C layer is protocol-transparent, arbitration, clock stretching, and Fm+ 400 kHz (1 MHz capable) timing behave exactly as on a standard bus, while cable capacitance and noise immunity requirements are decoupled from the bus segment.
Typical applications include industrial automation bus extension, rack and backplane inter-board communication in servers, battery management systems in electrically noisy traction environments, and long-run I2C links between enclosures or display modules.
A key design consideration is power sequencing of the dual supplies (VDD(A) on the single-ended side and VDD(B)/VL on the differential side); both must remain within the datasheet recommended operating conditions and EN should be held low during startup to prevent glitching.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, with freshness data as of 2026-10-20.
Alternativas drop-in para PCA9614DP,118 — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
PCA9614DPZ
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PCA9614DP,151
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
PCA9615DP,118
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
PCA9614DP,118 Especificações
| Product Type | 2-channel multipoint Fast-mode Plus differential I2C-bus buffer |
| Number of Channels | 2 |
| Bus Protocol | SMBus / I2C-bus, differential dI2C physical layer |
| Maximum Bus Frequency | 400 kHz (Fast-mode Plus class) |
| Supply Type | Dual supply |
| Pino de habilitação | Yes, EN with internal pull-up (internal pull-up holds device enabled) |
| Noise Immunity | Differential signaling for electrically noisy environments |
| Protocol Transparency | dI2C physical layer transparent to SMBus/I2C-bus protocol layer |
| Encapsulamento | TSSOP-10 (DP) |
| Tipo de montagem | Surface Mount |
| Packaging Suffix 118 | Standard packing (reel) code per NXP ordering convention |
Guia de Configuração de Pinos do PCA9614DP,118 tssop-10 (dp)
Configuração de pinos para PCA9614DP,118 (pacote tssop-10 (dp)). A numeração dos pinos, funções e diagramas de conexão estão definidos no datasheet do fabricante. Consulte-o para o footprint exato e diretrizes de soldagem.
Nenhum dado detalhado de pinagem disponível para PCA9614DP,118.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
PCA9614DP,118 é adequado para 6 aplicaçãos: Industrial Automation Bus Extension, Battery Management Systems, Server Backplane Inter-Board Communication, Electrically Noisy Point-to-Multipoint Sensor Networks, Long-Run Display and Panel Interconnects, Legacy Design Maintenance and Obsolete-Part Replacement.
Industrial Automation Bus Extension
The PCA9614DP,118 fits factory-floor I2C links because its differential dI2C physical layer rejects the common-mode noise generated by motors, contactors, and switching power supplies along the cable route. A single-ended Fm+ 400 kHz bus from the PLC-side controller enters the buffer's single-ended side; SDA and SCL emerge as two differential pairs that tolerate ground potential differences between cabinets. At each remote node a matching differential buffer restores the standard single-ended I2C levels, and because the dI2C layer is protocol-transparent, arbitration and clock stretching work unchanged. The EN pin lets the integrator isolate a segment during commissioning, and the internal pull-up keeps the link enabled during normal operation.
Recomendado
Battery Management Systems
In traction and industrial battery packs, cell monitoring boards are scattered across a high-noise environment with significant ground potential differences - conditions that corrupt single-ended I2C beyond a few centimeters. The PCA9614DP,118 addresses this with differential signaling: the 2-channel multipoint architecture drives SDA and SCL as differential pairs across the pack's wiring harness, serving multiple monitoring nodes on one segment. The dual-supply design allows the single-ended side to run at the controller's logic voltage while the differential side spans the harness. Since the dI2C layer preserves SMBus/I2C protocol timing at Fm+ class speeds, standard cell-monitoring firmware requires no changes, and the EN pin supports segment isolation during balancing events.
Recomendado
Server Backplane Inter-Board Communication
Rack servers use I2C for thermal sensors, power-supply telemetry, and hot-swap controllers spread across backplanes several tens of centimeters long - distances that push single-ended bus capacitance past its limit. The PCA9614DP,118 buffers each bus segment differentially: the 400 kHz Fm+ class link crosses the backplane as low-swing differential pairs with low radiation and high noise immunity against switching-regulator ripple from multiple VRMs on the plane. Its multipoint 2-channel topology lets several plug-in cards share one dI2C segment, and an EN pin enables card-insertion isolation. The TSSOP-10 DP package fits the tight vertical clearances typical of card-edge assemblies.
Recomendado
Electrically Noisy Point-to-Multipoint Sensor Networks
Distributed sensor clusters - pressure, temperature, and gas sensors along a machine frame - need a shared clocked bus that survives variable-frequency-drive noise. The PCA9614DP,118 converts the master's single-ended I2C into a differential multipoint dI2C segment, so every sensor drop point taps the same two differential pairs. Because the dI2C physical layer is transparent to the I2C protocol layer, standard sensor addresses, arbitration, and clock stretching behave exactly as on a short single-ended bus, eliminating firmware rework. The differential receivers' common-mode rejection compensates for ground shifts between mounting points, and the buffered outputs restore fast edges that a passive bus would lose to cable capacitance.
Recomendado
Long-Run Display and Panel Interconnects
Large panels and display assemblies often place the I2C control bus (EDID, backlight, touch controller) more than a meter from the video board, in the proximity of display-driver switching noise. The PCA9614DP,118 extends this control bus differentially: the Fm+ 400 kHz class link stays well within timing margin over long cable runs because buffer outputs regenerate signal edges regardless of cable capacitance. The dual-supply arrangement lets the single-ended side match the display-side 3.3 V logic while the differential side is optimized for the harness. The EN pin allows the host to blank panel communication during standby, and the internal pull-up guarantees the link is enabled at default power-up.
Recomendado
Legacy Design Maintenance and Obsolete-Part Replacement
Because DigiKey lists the PCA9614DP,118 as obsolete, the largest current use case is sustaining long-life industrial and transportation equipment that already uses the part. The drop-in footprint-compatible PCA9614DPZ keeps the same TSSOP-10 (DP) land pattern and silicon, so an existing PCB accepts the substitution without layout change. Maintenance engineers should also use the EN pin with internal pull-up behavior documented in the NXP datasheet when re-verifying bus isolation circuits, and treat remaining PCA9614DP,118 stock as a finite last-time-buy resource. XAIPART provides pricing from 1 to 1000+ units as of 2026-10-20 to support these buys.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para PCA9614DP,118 — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | PCA9614DPZ | PCA9614DP,151 | PCA9615DP,118 |
|---|---|---|---|---|
| Package | TSSOP-10 (DP) | TSSOP-10 (DP) - same | TSSOP-10 (DP) - same | TSSOP-10 (DP) class - verify footprint |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Number of Channels | 2 | 2 | 2 | 1 (point-to-point) |
| Bus Type | Fm+ SMBus/I2C differential (dI2C) multipoint | Fm+ dI2C multipoint - same | Fm+ dI2C multipoint - same | Fm+ dI2C point-to-point |
| Channel Rate | 400 kHz (per DigiKey listing) | 400 kHz | 400 kHz | 1 MHz class (verify datasheet) |
| Enable Pin | Yes, EN with internal pull-up | Yes, EN with internal pull-up | Yes, EN with internal pull-up | Yes, EN |
| Protocol Transparency | dI2C layer transparent to SMBus/I2C protocol | Same | Same | Same |
| Lifecycle Status | Obsolete (per DigiKey) | Verify on NXP product page | Verify on NXP product page | Active (verify current status) |
Principais diferenciais
- True 2-channel multipoint topology (vs PCA9615DP,118)
- EN pin with internal pull-up (vs PCA9614DPZ)
- Protocol-transparent dI2C layer (vs Single-ended repeaters such as TCA9517)
Notas de projeto
Place 100 nF ceramic decoupling capacitors within 2 mm of both supply pins (VDD(A) on the single-ended side and the differential-side supply), because the differential drivers switch both channels on the same SCL edges and shared supply bounce degrades dI2C signal symmetry. Route the two differential pairs as matched traces with controlled spacing if the dI2C link exceeds 20 cm, and avoid running them parallel to switching-regulator inductors. Keep the single-ended SDA/SCL stubs between the host controller and the PCA9614 as short as possible.
The EN pin has an internal pull-up per the NXP datasheet, so a floating EN leaves the buffer enabled - if your design intends EN to gate traffic during MCU reset, drive it with a push-pull output or an explicit pull-down resistor, not a floating net. Also verify EN state during power-up: if the differential-side supply comes up after the single-ended side, the enabled buffer can pass glitched edges to downstream slaves. Sequencing both supplies together, or holding EN low until both rails are valid, avoids spurious bus states.
This is a dual-supply device; both the single-ended (VDD(A)) and differential-side supplies must be present and within the datasheet recommended range before the dI2C link is considered operational. Because the part is listed obsolete by DigiKey, remaining stock may come from older date codes - verify supply current on received lots against the datasheet typical values during incoming inspection. For cable runs with several multipoint nodes, budget a small additional supply margin for the combined differential load.
Informações de conformidade
Compliance status not stated in retrieved web data; the NXP DPZ ordering suffix typically denotes RoHS designation. Confirm on the official NXP product page (https://www.nxp.com/part/PCA9614DP).
