Overview
The PCA9615DPZ, produced by NXP USA Inc., is a 2-channel multipoint Fast-mode Plus 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 is designed to improve resistance to system noise and ground offset, making it suitable for various applications in harsh environments.
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 | 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 | Driving termination; 2 channels | - | 70 | 91 | mA |
| Data Rate (Max) | - | - | - | 400 kHz | kHz |
| Input Capacitance | - | - | - | 7 pF | pF |
| Operating Temperature | - | -40 | - | 85 | °C |
Key Features
- 2-channel differential I2C-bus to Fast-mode Plus single-ended buffer operating up to 1 MHz with 30 mA SDA/SCL drive capability.
- Hot-swap logic allows insertion or removal of modules or cards without disruption to bus data.
- EN signal controls the hot-swap sequence.
- Bus idle detect function waits for a bus idle condition before making the connection.
- Compatible with I2C-bus Standard/Fast-mode and SMBus, Fast-mode Plus up to 1 MHz.
- Improved resistance to system noise and ground offset up to 1/2 of supply voltage.
Applications
- Monitoring remote temperature/leak detectors in harsh environments.
- Control of power supplies in high noise environments.
- Transmission of I2C-bus between equipment cabinets.
- Commercial lighting and industrial heating/cooling control.
- Any application that requires long I2C-bus runs in electrically noisy environments.
- Any application with multiple power suppliers and the potential for ground offsets up to 2.5 V.
Q & A
- What is the PCA9615DPZ used for?
The PCA9615DPZ is used as a 2-channel multipoint Fast-mode Plus differential I2C-bus buffer to extend the normal single-ended SMBus/I2C-bus through electrically noisy environments.
- 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 maximum data rate supported by the PCA9615DPZ?
The PCA9615DPZ supports a maximum data rate of 400 kHz.
- Does the PCA9615DPZ support hot-swap applications?
Yes, the PCA9615DPZ includes hot-swap logic that allows insertion or removal of modules or cards without disrupting bus data.
- What is the purpose of the EN signal in the PCA9615DPZ?
The EN signal controls the hot-swap sequence and ensures that the connection between the differential and single-ended buses is made only after a bus idle condition is detected.
- Is the PCA9615DPZ compatible with standard I2C-bus protocols?
Yes, the PCA9615DPZ is compatible with I2C-bus Standard/Fast-mode and SMBus, Fast-mode Plus up to 1 MHz.
- What are some typical applications of the PCA9615DPZ?
Typical applications include monitoring remote temperature/leak detectors, controlling power supplies in high noise environments, and transmitting I2C-bus between equipment cabinets.
- What is the operating temperature range of the PCA9615DPZ?
The operating temperature range is from -40°C to +85°C.
- Is the PCA9615DPZ RoHS compliant?
Yes, the PCA9615DPZ is RoHS compliant.
- What is the input capacitance of the PCA9615DPZ?
The input capacitance is 7 pF.
