Overview
The FXMA2102L8X, produced by onsemi, is a high-performance configurable dual-voltage-supply translator designed for bi-directional voltage translation between any two levels from 1.65 V to 5.5 V. This device is specifically intended for use as a voltage translator between I2C-Bus compliant masters and slaves. It features automatic direction sensing, eliminating the need for direction control, and supports both standard-mode and fast-mode I2C-Bus devices.
Key Specifications
| Parameter | Condition | Min | Max | Unit |
|---|---|---|---|---|
| VCCA (V) | 1.65 | 5.50 | V | |
| VCCB (V) | 1.65 | 5.50 | V | |
| VIHA (High Level Input Voltage A) | Data Inputs An | VCCA - 0.4 | V | |
| VIHB (High Level Input Voltage B) | Data Inputs Bn | VCCB - 0.4 | V | |
| Output Rise Time (trise) | VCCO = 4.5 to 5.5 V, CL = 50 pF, RPU = 2.2 kΩ | 3 | ns | |
| Output Fall Time (tfall) | VCCO = 4.5 to 5.5 V, CL = 50 pF, RPU = 2.2 kΩ | 1 | ns | |
| Input Capacitance (CIN) | VCCA = VCCB = GND | 2.2 | pF | |
| Input/Output Capacitance (CI/O) | VCCA = VCCB = 5.0 V, OE = GND, VA = VB = 5.0 V | 13.0 | pF | |
| Operating Temperature Range | -40 | 85 | °C | |
| Package | 8-Lead MicroPak, 1.6 mm Wide (Pb-Free) |
Key Features
- Bi-directional interface between any two levels: 1.65 V to 5.5 V
- No direction control needed
- System GPIO resources not required when OE tied to VCCA
- I2C 400 pF buffer / repeater
- I2C bus isolation
- Open-drain inputs / outputs
- Accommodates standard-mode and fast-mode I2C-Bus devices
- Supports I2C clock stretching & multi-master
- Fully configurable: inputs and outputs track VCC
- Control input (OE) referenced to VCCA
- Non-preferential power-up; either VCC may be powered-up first
- Outputs switch to 3-state if either VCC is at GND
- Tolerant output enable: 5 V
- ESD protection exceeds 5 kV HBM and 2 kV CDM
- Packaged in 8-terminal leadless MicroPak (1.6 mm x 1.6 mm) and ultrathin MLP (1.2 mm x 1.4 mm)
Applications
The FXMA2102L8X is ideal for various applications requiring voltage translation and isolation between different voltage domains. These include:
- I2C bus systems where masters and slaves operate at different voltage levels
- Embedded systems requiring voltage translation for GPIO signals
- Industrial control systems with mixed-voltage I/O
- Consumer electronics with multiple voltage domains
- Automotive systems needing robust voltage translation and isolation
Q & A
- What is the voltage range supported by the FXMA2102L8X?
The FXMA2102L8X supports bi-directional voltage translation between any two levels from 1.65 V to 5.5 V.
- Does the FXMA2102L8X require direction control?
No, the FXMA2102L8X does not require direction control due to its automatic direction sensing capability.
- How does the FXMA2102L8X handle power-up and power-down sequencing?
The device allows either VCC to be powered up first, and it has internal power-down control circuits that place the device in 3-state if either VCC is removed.
- What is the maximum bus capacitance the FXMA2102L8X can drive?
The FXMA2102L8X can drive a capacitive bus up to 400 pF, making it suitable as an I2C buffer/repeater.
- Does the FXMA2102L8X support I2C clock stretching and multi-master operations?
- How is the output enable (OE) pin referenced?
The output enable (OE) pin is referenced to VCCA.
- What is the ESD protection level of the FXMA2102L8X?
The FXMA2102L8X has ESD protection that exceeds 5 kV HBM and 2 kV CDM.
- In what packages is the FXMA2102L8X available?
The FXMA2102L8X is available in 8-terminal leadless MicroPak (1.6 mm x 1.6 mm) and ultrathin MLP (1.2 mm x 1.4 mm) packages.
- What are the recommended pull-up resistor values for the FXMA2102L8X?
The recommended pull-up resistor values are between 1 kΩ to 10 kΩ, depending on the total bus capacitance.
- Can the OE pin be hardwired to VCCA?
