In server motherboard design, the BMC (Baseboard Management Controller), PMBus power management bus, and SMBus monitoring link often span multiple voltage domains, including 1.2V, 1.8V, 3.3V, and even 5V. When I²C/SMBus signals need to be directly interconnected between different power rails, the absence of appropriate level-shifting circuits can result in communication errors or bus lockups at best, and port damage due to voltage mismatch at worst. The NCA9306, a dual-channel, bidirectional I²C and SMBus multi-voltage level converter, is a compact solution specifically designed for these types of mixed-voltage signal chains found inside servers. Mingjiada Electronics currently has the NCA9306 series in stock, providing a stable supply to server ODMs/OEMs and BMC board manufacturers.
NCA9306 Description
The NCA9306 is a dual-channel, bidirectional I²C and SMBus voltage level converter with an enable (EN) input, capable of bidirectional voltage conversion between 1.2 V and 5 V without the need for direction pins. This switch features low on-resistance (RON), enabling connection establishment with minimal propagation delay. When EN is high, the converter 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 the ports. When EN is low, the converter switch is off, and a high-impedance state exists between the ports. In addition to voltage conversion, the NCA9306 device can be used to isolate a 400-kHz bus from a 100-kHz bus by controlling the EN pin to disconnect the slower bus during fast-mode communication.
NCA9306 Features
• 2-bit bidirectional converter for SDA and SCL lines in I²C applications
• Compatible with I²C and System Management Bus (SMBus)
• Supports level conversion between the following voltages
- 1.2 V VREF1 and 1.8 V, 2.5 V, 3.3 V, or 5 V VREF2
- 1.8 V (VREF1) and 2.5 V, 3.3 V, or 5 V (VREF2)
- 2.5 V (VREF1) and 3.3 V or 5 V (VREF2)
- 3.3 V (VREF1) and 5 V (VREF2)
• Provides bidirectional voltage conversion without directional pins
• Open-drain I²C I/O ports (SCL1, SDA1, SCL2, and SDA2)
• Latch performance exceeding 100 mA, compliant with JESD78 Class II specifications
• ESD protection exceeding JESD22 standards
- 2000 V Human Body Model (A114-A)
- 1000 V Charged Device Model (C101)
• Operating temperature: -40°C to 105°C
• RoHS-compliant packages: VSSOP-8, TSSOP-8
NCA9306 Applications
• I²C, SMBus, PMBus, MDIO, UART, low-speed SDIO, GPIO, and other bidirectional signal interfaces
• Servers
• Routers (telecommunications switching equipment)
• Personal computers
• Industrial automation
Mingjiada Supply Information
Mingjiada Electronics supplies the NCA9306 series of dual-channel bidirectional I²C/SMBus level shifters. Models in stock include:
Model Package Brand Remarks
NCA9306-DVSR VSSOP-8 Novosense In stock, brand-new and factory-sealed
As a supplier with extensive experience in electronic component distribution, Mingjiada supports both small-lot sample orders and mass production purchases of the NCA9306 series, offering a guarantee of genuine, original products and flexible delivery schedules. Server board manufacturers and BMC design teams requiring samples or bulk quotes for the NCA9306 may contact the Mingjiada sales team directly for assistance.
Contact: Mr. Chen
Mobile: +86 13410018555
Email: sales@hkmjd.com
Address: Rooms 1239-1241, Guoli Building, Zhenzhong Road, Futian District, Shenzhen, Guangdong Province
Website: www.integrated-ic.com
Tags: NCA9306-DVSR, NCA9306-DVS, NCA9306-DV, NCA9306-D, NCA9306
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