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NCA9306

2-bit bidirectional multi-voltage level translator; open-drain; push-pull

The NCA9306 is a 2 channel bidirectional I²C and SMBus multi-voltage level translator with an enable (EN) pin input. It allows voltage translation between 0.95 V and 5 V without the use of a direction pin. It supports up to 100 MHz up translation and >100 MHz down translation at ≤ 30 pF capacitive load. There is no need for a direction pin which minimizes the system effort. The NCA9306 supports 5 V tolerant I/O pins to support mixed mode signal operation. The ability to set up different voltage translation levels on each channel makes the device very flexible and suitable for a lot of different applications.

The low ON-state resistance RON of the switch allows connections to be made with minimal propagation delay. When EN is HIGH, the translator switch is on, and the SCLA and SDAA I/O are connected to the SCLB and SDAB I/O respectively, allowing bidirectional data flow between ports. When EN is LOW, the translator switch is off, and a high-impedance state exists between ports. As with the standard I²C bus-system, pull-up resistors are required to provide the logic HIGH levels on the translators bus. The NCA9306 has a standard open-drain configuration of the I²C-bus. The size of these pull-up resistors depend on the system. Each side of the translator must have a pull-up resistors. NCA9306 is designed to work with Standard-mode, Fast-mode and Fast-mode plus I²C bus devices in addition to the SMBus devices.

When the SDAA or SDAB pin is LOW, the clamp is in the ON-state and a low resistance connections exists between the SDAA and SDAB ports. Assuming the higher voltage is on the SDAB port when the SDAB port is HIGH, the voltage on the SDAA port is limited to the voltage set by refA. When the SDAA port is HIGH, the SDAB port is pulled to the refB supply voltage by the pull-up resistors. The SCLA or SCLB pins also follows the same behavior as described for SDAA or SDAB pins.

Features and benefits

  • 2-channel bidirectional voltage translator for SDA and SCL lines in mixed mode I²C bus applications

  • Open-drain I²C-bus I/O ports (SCLA, SDAA, SCLB and SDAB)

  • Provides bidirectional voltage translation with no direction pin

  • High-impedance SCLA, SDAA, SCLB and SDAB for EN = LOW

  • Up translation

    • < 100 MHz; CL = 30 pF

    • < 40 MHz; CL = 50 pF

  • Down translation

    • > 100 MHz; CL = 30 pF

    • < 40 MHz; CL = 50 pF

  • Hot insertion

  • Bidirectional voltage level translation between:

    • 0.95 V and 1.8 V, 2.5 V, 3.3 V and 5.0 V

    • 1.2 V and 1.8 V, 2.5 V, 3.3 V and 5.0 V

    • 1.8 V and 2.5 V, 3.3 V and 5.0 V

    • 2.5 V and 3.3 V and 5.0 V

    • 3.3 V and 5.0 V

  • Low standby current

  • 5 V tolerant I²C-bus I/O pins to support mixed mode signal operation

  • Low RON provides less signal distortion

  • Latch-up performance exceeds 100 mA per JESD78 class II level A

  • ESD protection:

    • HBM ANSI/ESDA/JEDEC JS-001 Class 2 exceeds 2000 V

    • CDM ANSI/ESDA/JEDEC JS-002 Class C3 exceeds 1000 V

  • Specified from -40 °C to +125 °C

Applications

  • GPIO, MDIO, PMBus, SMBus, SDIO, UART, I²C, and other interfaces in Telecom infrastructure

  • Industrial

  • Personal computing

  • Router and Industrial Automation

Parametrics

Type numberProduct statusVCC(A) (V)VCC(B) (V)Logic switching levelsOutput drive capability (mA)tpd (ns)Nr of bitsPower dissipation considerationsTamb (°C)Rth(j-a) (K/W)Ψth(j-top) (K/W)Rth(j-c) (K/W)Package name
NCA9306DCProduction0.95 - 5.00.95 - 5.0CMOSn.a.0.42low-40~12520636.1117VSSOP8
NCA9306DPProduction0.95 - 5.00.95 - 5.0CMOSn.a.0.42low-40~12521921.1107TSSOP8
NCA9306GSProduction-----------XSON8
NCA9306GXProduction0.95 - 5.00.95 - 5.0CMOSn.a.0.42low-40~1254077.9200X2SON8

Package

Type numberPackagePackage informationReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
NCA9306DC
VSSOP8
(SOT765-1) 		SOT765-1SOT765-1_125Activeh9NCA9306DCH
( 9356 910 26125 )
NCA9306DP
TSSOP8
(SOT505-2) 		SOT505-2SOT505-2_125Activeh9NCA9306DPH
( 9356 910 27125 )
NCA9306GS
XSON8
(SOT1203) 		SOT1203REFLOW_BG-BD-1
SOT1203_115Activeh9NCA9306GSX
( 9356 919 32115 )
NCA9306GX
X2SON8
(SOT1233-2) 		SOT1233-2SOT1233-2_115Activeh9NCA9306GXX
( 9356 910 25115 )

Environmental information

Type numberOrderable part numberChemical contentRoHSRHF-indicatorLeadfree conversion date
NCA9306DCNCA9306DCHNCA9306DC
NCA9306DPNCA9306DPHNCA9306DP
NCA9306GSNCA9306GSXNCA9306GS
NCA9306GXNCA9306GXXNCA9306GX
Quality and reliability disclaimer

Documentation (7)

File nameTitleTypeDate
NCA93062-bit bidirectional multi-voltage level translator; open-drain; push-pullData sheet2024-03-14
SOT1233-2plastic thermal enhanced extremely thin small outline package; no leads;8 terminals; body 1.35 x 0.8 x 0.32 mmPackage information2022-04-21
SOT505-2plastic, thin shrink small outline package; 8 leads; 0.65 mm pitch; 3 mm x 3 mm x 1.1 mm bodyPackage information2022-06-03
MAR_SOT1203MAR_SOT1203 TopmarkTop marking2013-06-03
SOT1203plastic, leadless extremely thin small outline package; 8 terminals; 0.35 mm pitch; 1.35 mm x 1 mm x 0.35 mm bodyPackage information2022-06-03
REFLOW_BG-BD-1Reflow soldering profileReflow soldering2021-04-06
SOT765-1plastic, very thin shrink small outline package; 8 leads; 0.5 mm pitch; 2 mm x 2.3 mm x 1 mm bodyPackage information2022-06-03

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