Overview
The PCA9617ADMR2G, produced by onsemi, is a level-translating Fast-Mode Plus (Fm+) I2C-bus repeater. This CMOS integrated circuit is designed to provide level shifting between low voltage (0.8 V to 5.5 V) and higher voltage (2.2 V to 5.5 V) I2C-bus or SMBus systems. It retains all the operating modes and features of the I2C-bus system during level shifts, enabling the extension of the I2C-bus by providing bidirectional buffering for both the data (SDA) and the clock (SCL) lines.
Key Specifications
| Parameter | Conditions | Min | Typ | Max |
|---|---|---|---|---|
| Port A Operating Supply Voltage Range | 0.8 V to 5.5 V | 0.8 V | - | 5.5 V |
| Port B Operating Supply Voltage Range | 2.2 V to 5.5 V | 2.2 V | - | 5.5 V |
| Clock Frequency | - | 0 Hz | - | 1000 kHz |
| Capacitance per Bus Segment at 1 MHz | - | - | - | 540 pF |
| Capacitance per Bus Segment at Lower Speeds | - | - | - | 4000 pF |
| Storage Temperature | - | -55°C | - | 125°C |
| Ambient Temperature | - | -40°C | - | 85°C |
| Junction Temperature | - | - | - | 125°C |
Key Features
- Two-channel, bidirectional buffer isolates capacitance and allows up to 540 pF on either side of the device at 1 MHz and up to 4000 pF at lower speeds.
- Voltage level translation from 0.8 V to 5.5 V and from 2.2 V to 5.5 V.
- Footprint and functional replacement for PCA9517A at Fast-mode speeds.
- 5 V tolerant I2C-bus and enable pins.
- Active HIGH repeater enable input referenced to VCC(B).
- Open-drain input/outputs.
- Latching free operation.
- Supports arbitration and clock stretching across the repeater.
- Accommodates Standard-mode, Fast-mode, and Fast-mode Plus I2C-bus devices, SMBus (Standard and High Power Mode), PMBus, and multiple masters.
- Powered-off high-impedance I2C-bus pins.
Applications
The PCA9617ADMR2G is suitable for various applications requiring level translation and bus extension in I2C-bus and SMBus systems. These include:
- Industrial automation systems.
- Consumer electronics.
- Automotive systems.
- Medical devices.
- Any system requiring voltage level translation and bus capacitance isolation.
Q & A
- What is the primary function of the PCA9617ADMR2G?
The PCA9617ADMR2G is a level-translating Fast-Mode Plus (Fm+) I2C-bus repeater that provides voltage level shifting between low voltage and higher voltage I2C-bus or SMBus systems. - What is the operating supply voltage range for Port A and Port B?
Port A operates from 0.8 V to 5.5 V, and Port B operates from 2.2 V to 5.5 V. - What is the maximum clock frequency supported by the PCA9617ADMR2G?
The PCA9617ADMR2G supports clock frequencies from 0 Hz to 1000 kHz. - How much capacitance can each bus segment handle at 1 MHz and lower speeds?
Each bus segment can handle up to 540 pF at 1 MHz and up to 4000 pF at lower speeds. - Is the PCA9617ADMR2G compatible with multiple I2C-bus modes?
Yes, it supports Standard-mode, Fast-mode, and Fast-mode Plus I2C-bus devices, as well as SMBus (Standard and High Power Mode) and PMBus. - Can multiple PCA9617ADMR2G devices be connected in series?
Yes, multiple devices can be connected in series (Port A to Port B) without any build-up in offset voltage, considering only time of flight delays. - What is the storage temperature range for the PCA9617ADMR2G?
The storage temperature range is from -55°C to 125°C. - Are the I2C-bus pins overvoltage tolerant?
Yes, the I2C-bus pins are overvoltage tolerant up to 5.5 V even when the device is unpowered. - Does the PCA9617ADMR2G support arbitration and clock stretching?
Yes, it supports arbitration and clock stretching across the repeater. - What is the typical power-up sequence for the PCA9617ADMR2G?
The output drivers are turned off until VCC(B) is above 2.2 V and VCC(A) is above 0.8 V. The enable (EN) pin must be HIGH for the device to operate.
