June 17, 2020 – Suzhou Nanochip Microelectronics Co., Ltd. (hereinafter referred to as “Nanochip”), a leading domestic provider of signal chain chips and solutions, recently announced the launch of five I2C bus interface chip products, suitable for Control bus designs in a variety of industrial, enterprise and consumer applications such as security, power electronics, personal computers, enterprise switches, servers, and more. The new products in the series include the I2C/SMBus universal bus I/O expander NCA9555, I2C/SMBus hot-swap buffer NCA9511, quad I2C/SMBus multiplexer NCA9545, I2C/SMBus dual bidirectional buffer NCA9617 and I2C /SMBus level translator NCA9306, these five chips can operate stably in a wide temperature operating range from -40°C to 85°C, with a latch-up performance of over 100mA, all comply with the JESD78 II specification, and are compatible with most MCU I/O circuits level, improve system integration, and bring better performance and lower cost.
The NCA9xxx family of products can provide engineers with maximum control bus design flexibility. With the development of applications such as the Internet of Things, the complexity of system design continues to increase. Multiple master devices and a large number of terminal devices often exist in a system. The ultra-long wiring caused by the interconnection of multiple devices further affects the increase in control bus layout. Difficulty, but also bring more challenges of signal integrity, NCA9xxx provides an ideal solution to meet these challenges. Using the NCA9xxx series chips, engineers can not only make the system meet the function expansion needs, but also simplify the Circuit design to improve signal integrity and EMI, ultimately effectively saving development time and reducing the total system cost.
NCA9xxx is fully compatible with mainstream I2C interface chips in the market. Users can directly replace them without modifying the design, reducing costs and improving performance, helping customers deal with supply risks caused by international trade disputes.
Wang Shengyang, CEO of Nanochip Microelectronics, said: “I2C is the most common device management bus at present, with a wide range of applications and low development cost, and is widely loved by engineers. The NCA9xxx series I2C interface products meet industrial temperature requirements and are compatible with most MCUs on the market. It fully meets the function and performance requirements of the I2C bus in system development. This series of products have been localized from design, manufacturing to packaging and testing to ensure the safety and reliability of supply. In addition, Nanochip also provides flexible Inventory management mechanism to better meet the delivery needs of domestic customers.”
Nanochip’s NCA9xxx I2C interface product series adopts small packages commonly used in the industry, including TSSOP24, MSOP8, SOP8, TSSOP20, TSSOP16, etc. The package form of specific models can be viewed on the official website or emailed to
Appendix: NCA9xxx series product information
NCA9555: 16-Bit I2C and SMBus I/O Expander with Interrupt Output and Configurable Registers
Features:
I2C to Parallel Port Expander
16 GPIO ports, default input
Working voltage 2.3~5.5V
3 address pins, support 8 different addresses
Open-drain circuit active low interrupt output
5V tolerant I/O ports
Compatible with most microcontrollers
400kHz fast I2C bus
Polarity Inversion Register
Latched output with maximum high current drive capability for direct LED drive
Lock-off performance exceeds 100mA
The NCA9555 is a 24-pin CMOS device that provides 16-bit general purpose parallel input/output (GPIO) expansion for I2C bus applications. It provides an easy solution to achieve standby power consumption as low as 0.25uA when additional I/O is required for ACPI power switches, sensors, buttons, LEDs, fans, etc.
NCA9511: Hot Swap I2C Bus and SMBus Buffer
Features:
Support I2C bus signal bidirectional data transmission
Operating Supply Voltage Range from 2.3V to 5.5V
TA ambient air temperature range -40°C to 105°C
1V precharge on all SDA and SCL lines to prevent damage during live board insertion
Compatible with Standard Mode and Fast Mode I2C Devices
Supports clock stretching, arbitration and synchronization
Power down high impedance I2C pins
The NCA9511 is a hot-swappable I2C bus buffer that supports insertion of I/O cards into a powered backplane without damaging the data and clock buses. The control circuit prevents the backplane side I2C line (input) from being connected to the card side I2C line (output) until a stop command or bus idle condition occurs on the backplane and there is no bus contention on the card. Once the connection is established, the device provides bidirectional buffering, keeping the backplane and card capacitances separate. During insertion, the SDA and SCL lines are precharged to 1V to minimize the current required to charge the parasitic capacitance of the device.
NCA9545: 4-Channel I2C and SMBus Multiplexer with Interrupt Logic and Reset
Features:
4 out of 1 I2C selector
Support 4 interrupt input, 1 output
2 address pins, support 4 different addresses
0~400K I2C clock
Power supply voltage range 2.3V~5.5V
Latch-up performance exceeds the 100mA required by JESD78
The NCA9545 is a quad bidirectional transfer switch controlled by the I2C bus and supports hot swapping. Serial Clock/Serial Data (SCL/SDA) upstream pairs are spread across four downstream pairs, or lanes. Depending on the contents of the programmable control registers, any individual SCn/SDn channel combination can be selected. Four interrupt inputs (INT3-INT0) are provided, each for a downstream pair. One interrupt (INT) output can be used as an AND (AND) operation of four interrupt inputs.
NCA9617: I2C and SMBus Dual Bidirectional Buffer
Features:
Dual channel bidirectional buffer
Support standard mode/400K/1Mhz I2C mode
0.8V~5.5V to 2.2V~5.5V level shift;
I2C BUS high-impedance state when VCC is powered down
Latch-up performance exceeds the 100mA required by JESD78
The NCA9617 is a dual bidirectional buffer dedicated to I2C bus and SMBus, supporting standard mode, fast mode (400kHz) and fast mode+ (1MHz). The device provides bidirectional voltage level translation (up-translation mode and down-translation mode) between low voltage (as low as 0.8V) and higher voltage (2.2V to 5.5V) in hybrid applications. During level translation, I2C and similar bus systems can be expanded without sacrificing system performance.
NCA9306: 2-Bit Bidirectional I2C-Bus and SMBus Level Shifter
Features:
Two-channel bidirectional level translation
Voltage level translation is possible between the following voltages
1.2V to 1.8V/2.5V/3.3V/5V
1.8V to 2.5V/3.3V/5V
2.5V to 3.3V/5V
3.3V to 5V
0~1Mhz I2C clock
Open-drain I2C I/O port
Latch-up performance exceeds the 100mA required by JESD78
The NCA9306 device is a dual bidirectional I2C and SMBus voltage level translator with an enable (EN) input that enables bidirectional voltage translation from 1.2V to 5V without the use of a direction pin. This switch has a low on-state resistance (RON) and a maximum propagation delay of less than 1.5ns, allowing connections to be made with the shortest propagation delay. When EN is high, the translator switch is turned on, and the SCL1 and SDA1 I/Os are connected to the SCL2 and SDA2 I/Os, respectively, enabling bidirectional data flow between ports. When EN is low, the translator switch is closed and a high impedance state exists between the ports. In addition to voltage translation, controlling the EN pin to disconnect slower buses during fast-mode communication, the NCA9306 device can also be used to isolate a 400kHz bus from a 100kHz bus.
About Nanochip
Suzhou Nanochip Microelectronics Co., Ltd. is a leading provider of signal chain chips and solutions in China, focusing on two major product directions: sensors and digital isolation. Nanochip Microelectronics focuses on the design, development, production and sales of high-performance integrated circuit chips, providing customers with one-stop system solutions. For more information, visit www.novosns.com
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