Overview
The PCA9615DPJ, produced by NXP USA Inc., is a 2-channel multipoint Fast-mode Plus (Fm+) differential I2C-bus buffer. This device extends the normal single-ended SMBus/I2C-bus through electrically noisy environments using a differential SMBus/I2C-bus (dI2C) physical layer, which is transparent to the SMBus/I2C-bus protocol layer. It consists of two single-ended to differential driver channels for the SCL (serial clock) and SDA (serial data) lines, effectively reducing electrical noise and common-mode offsets. The PCA9615DPJ also features hot-swap logic, allowing for the insertion or removal of modules or cards without disrupting the existing signals.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| VDD(B) supply voltage | Port B differential bus | 3.0 | - | 5.5 | V |
| VDD(A) supply voltage | Port A single-ended bus | 2.3 | - | 5.5 | V |
| IDD(VDDA) supply current on pin VDD(A) | - | - | - | 16 | μA |
| IDDH(B) port B HIGH-level supply current | Both channels HIGH; VDD(B) = 5.5 V; SDAn = SCLn = VDD(A) = 5.5 V | 0.8 | - | 1.6 | mA |
| IDDL(B) port B LOW-level supply current | Both channels LOW; VDD(B) = 5.5 V; SDA and SCL = VSS; differential I/Os open | 1.1 | - | 1.8 | mA |
| Operating Temperature | - | -40 | - | 85 | °C |
| Package Type | - | - | - | 10-TFSOP, 10-MSOP (0.118, 3.00mm Width) | - |
Key Features
- Fast-mode Plus (Fm+) differential I2C-bus buffer with hot-swap logic
- Two single-ended to differential driver channels for SCL and SDA lines
- Reduces electrical noise and common-mode offsets in noisy environments
- Supports hot-swap applications, allowing module or card insertion/removal without signal disruption
- Bus idle detect function waits for a bus idle condition before making connections
- EN signal controls the hot-swap sequence
Applications
- Monitoring remote temperature/leak detectors in harsh environments
- Controlling power supplies in high noise environments
- Transmission of I2C-bus between equipment cabinets
- Commercial lighting and industrial heating/cooling control
- Any application requiring long I2C-bus runs in electrically noisy environments
- Any application with multiple power suppliers and potential ground offsets up to 2.5 V
Q & A
- What is the PCA9615DPJ used for? The PCA9615DPJ is used to extend the normal single-ended SMBus/I2C-bus through electrically noisy environments using a differential SMBus/I2C-bus (dI2C) physical layer.
- What are the key features of the PCA9615DPJ? It includes Fast-mode Plus (Fm+) differential I2C-bus buffering, hot-swap logic, and reduction of electrical noise and common-mode offsets.
- What are the supply voltage ranges for VDD(A) and VDD(B)? VDD(A) ranges from 2.3 V to 5.5 V, and VDD(B) ranges from 3.0 V to 5.5 V.
- What is the operating temperature range of the PCA9615DPJ? The operating temperature range is from -40°C to +85°C.
- What package types are available for the PCA9615DPJ? It is available in 10-TFSOP and 10-MSOP packages.
- How does the hot-swap feature work? The hot-swap feature allows for the insertion or removal of modules or cards without disrupting the existing signals, using an EN signal to control the hot-swap sequence and a bus idle detect function.
- What are some common applications of the PCA9615DPJ? Common applications include monitoring remote temperature/leak detectors, controlling power supplies in noisy environments, and transmitting I2C-bus between equipment cabinets.
- How does the PCA9615DPJ reduce noise in I2C-bus signals? It reduces noise by using differential transmission lines between identical dI2C bus buffers, removing electrical noise and common-mode offsets.
- Is the PCA9615DPJ suitable for environments with multiple power suppliers? Yes, it is suitable for environments with multiple power suppliers and potential ground offsets up to 2.5 V.
- What is the purpose of the EN signal in the PCA9615DPJ? The EN signal controls the hot-swap sequence, enabling or disabling the bus buffer as needed.
