Nexperia USA Inc. NCA9306DPH

Overview

NCA9306DPH from Nexperia is a 2-channel bidirectional I²C/SMBus voltage level translator with open-drain I/O, enabling seamless signal translation between 0.95 V and 5.0 V domains without direction control. It features EN-controlled switching, <100 MHz up-translation and >100 MHz down-translation at ≤30 pF load, and 5 V-tolerant I/O for mixed-voltage system interconnects-used in telecom infrastructure I²C bus bridging between 1.8 V microcontrollers and 3.3 V sensors.

For engineers reviewing the NCA9306DPH datasheet, NCA9306DPH pinout, NCA9306DPH application, or NCA9306DPH equivalent, key selection criteria include bidirectional translation capability without direction pin, R_ON ≤10 Ω at 1.8 V/3.3 V, thermal performance up to +125 °C, and TSSOP8 package compatibility with standard I²C pull-up resistor configurations.

Technical Context

The NCA9306DPH implements a passive MOSFET-based bidirectional translation architecture with dual reference supplies (refA for low-side, refB for high-side), eliminating need for direction control logic. Its EN pin enables/disables conduction path between SCLA/SDAA and SCLB/SDAB pairs, placing all I/O pins in high-impedance state when disabled.

Translation behavior is asymmetric: up-translation (low-to-high) is limited by refA supply and pull-up strength on refB side, while down-translation (high-to-low) relies on low R_ON clamping and is specified >100 MHz at 30 pF. Static leakage remains ≤5 μA across -40 °C to +125 °C.

Key Specifications

Pinout & Package

TSSOP8 package (SOT505-2): plastic thin shrink small outline, 8 leads, 3 mm body width, 0.5 mm lead length, pin 1 indicator at lower left corner below marking code 'h9'.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar bidirectional I²C level translation applications.

Compared with TXS0102DCUR and PCA9306D,118, the NCA9306DPH uniquely combines 5 V tolerance, -40 °C to +125 °C operation, and independent refA/refB for flexible mixed-voltage I²C bridging-making it the only option qualified for telecom infrastructure and high-reliability industrial control.

Availability

NCA9306DPH is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, server BMCs, and embedded edge AI gateways requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for NCA9306DPH includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Nexperia is a global semiconductor expert focused on essential efficiency technologies, delivering high-performance logic, analog, and MOSFET solutions for automotive, industrial, and computing markets.

The NCA9306 product line delivers robust, pin-compatible bidirectional level translators optimized for I²C, SMBus, and PMBus interoperability across heterogeneous voltage domains in mission-critical infrastructure.

FAQ

What pull-up resistor values are recommended for NCA9306DPH in a 1.8 V ↔ 3.3 V I²C interface?

For 1.8 V ↔ 3.3 V translation, use 2.2 kΩ pull-ups on the 1.8 V side (refA) and 4.7 kΩ on the 3.3 V side (refB). These values ensure VIH/VIL margins are met across temperature while limiting current to ≤64 mA per channel, per Nexperia's recommended operating conditions.

Can NCA9306DPH translate between 0.95 V and 5.0 V without external components?

Yes - NCA9306DPH supports 0.95 V ↔ 5.0 V translation natively using refA = 0.95 V and refB = 5.0 V. No external MOSFETs or direction logic are needed. The device maintains <100 MHz up-translation and >100 MHz down-translation at ≤30 pF, verified per datasheet Table 8.

Is the EN pin 5 V tolerant when the device is powered from 1.8 V?

Yes - the EN pin is 5 V tolerant regardless of refA/refB supply voltages. Absolute maximum rating allows VI(EN) up to +7.0 V (Table 5), and leakage current remains ≤5 μA at 5 V input (Table 7), enabling direct connection to 5 V enable signals in mixed-supply systems.

How does NCA9306DPH handle bus contention during power sequencing?

NCA9306DPH prevents contention via three mechanisms: (1) EN = LOW forces all I/O pins into high-impedance state; (2) R_ON remains >1 MΩ in OFF-state (C_io(off) ≤6.0 pF); (3) built-in hot-insertion support ensures no DC path between domains during staggered power-up, validated per JEDEC JESD78 latch-up testing.