NTS0302JK - 2-Bit Dual Supply Level Transceiver | NXP
料号： NTS0302JK ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0.62 | $0.62 |
| 10 | $0.56 | $5.60 |
| 100 | $0.44 | $44.00 |
| 500 | $0.38 | $190.00 |
| 1,000 | $0.32 | $320.00 |
NTS0302JK 概述
A dual-supply translating transceiver is a class of voltage level shifter IC within the logic and interface IC hierarchy. Unlike direction-controlled transceivers, auto direction sensing devices monitor the bus and reverse transmission direction without a DIR control pin, which removes firmware overhead and eliminates bus contention caused by incorrect direction settings. Open-drain ports additionally allow pull-up resistors to set each side's logic high level independently, supporting mixed-voltage I2C-style, open-drain, or slowly switching signaling.
Key features include fully bidirectional translation with no direction pin, open-drain A and B ports for flexible pull-up voltage selection, an OE input to place ports in the high-impedance state, and independent VCCA and VCCB supplies so either side can be powered down without latch-up risk. This architecture suits 1.2 V to 5 V rail combinations typical in mixed-voltage embedded systems.
The auto direction sensing engine detects which side is driving and propagates the state to the opposite side with short propagation delay, making the part suitable for two-wire and multi-drop open-drain buses. Because the ports are open drain, rise time is set by the external pull-up resistor and bus capacitance, giving designers direct control of edge rates for EMI management.
Typical applications include I2C and SMBus level shifting between 3.3 V microcontrollers and 5 V peripherals, GPIO translation in mixed-supply industrial and automotive body-electronics modules, and open-drain status or interrupt lines bridging power domains.
Design consideration: size the pull-up resistors so the RC rise time meets bus timing; excessively strong pull-ups increase sink current through the NTS0302 open-drain stages. Tie OE to the appropriate level when translation must always be active.
This page synthesizes distributor pricing context, alternative strategy, and practical design notes not found in the manufacturer datasheet.
直接替换替代料： NTS0302JK ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
NTS0302JKZ
✅ 直接替换📋 参考替代料（不在目录中）
NTS0302JK 规格参数
| 功能 | 2-bit dual supply translating transceiver |
| 输出类型 | Open drain |
| Direction Control | Auto direction sensing (no DIR pin) |
| Number of Bits | 2 |
| Ports | Two 1-bit input-output ports (A and B), one OE input |
| Output Enable | Yes (OE input) |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
| Datasheet Revision | Rev. 1.1 - 17 March 2025 |
NTS0302JK standard 引脚配置指南
NTS0302JK（standard 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： NTS0302JK.
请参阅 数据手册 以查看完整引脚配置。
典型应用
NTS0302JK 适用于 6 应用s: I2C Bus Level Shifting, Mixed-Voltage GPIO Translation, Automotive Body Electronics, Open-Drain Status and Interrupt Lines, Portable and Battery-Powered Devices, Industrial Sensor Interfaces.
I2C Bus Level Shifting
The NTS0302JK fits I2C level shifting because its open-drain A and B ports replicate the open-drain I2C topology: pull-up resistors on each side independently set SDA/SCL high levels (e.g., 3.3 V on the controller side, 5 V on the peripheral side), and the auto direction sensing engine reverses data direction on every acknowledge without a DIR pin. Placed inline on SDA and SCL with pull-ups sized against total bus capacitance (typically 2.2k-10k ohm at 100-400 kHz), the translator adds minimal propagation delay while preventing the 5 V domain from overstressing a 3.3 V-only microcontroller. The OE pin can gate the bus during power sequencing so a partially powered slave cannot clamp the line low.
推荐
Mixed-Voltage GPIO Translation
In mixed-supply embedded systems where a 1.8 V or 3.3 V MCU must communicate with 5 V industrial sensors or legacy peripherals, the NTS0302JK bridges two GPIO lines bidirectionally. The open-drain structure means each domain's pull-up defines its logic-high level, so the same PCB supports multiple voltage combinations by changing resistor values rather than the IC. Auto direction sensing removes firmware direction management, which is error-prone when GPIOs switch role between input and output at runtime. Designers should verify sink current per port against the datasheet rating when multiple lines are pulled low simultaneously, and use the OE input to tri-state both ports while the MCU boots into a safe state.
推荐
Automotive Body Electronics
Automotive body-control modules frequently mix 3.3 V or 5 V logic rails with 12 V-derived sensor domains scaled through dividers, and the NTS0302JK's dual-supply architecture fits these translation nodes between a body MCU and lin/braided sensor buses. The open-drain ports allow OR-wired status and interrupt lines from multiple suppliers to share one translated net, with each contributor pulling low and a single pull-up defining the high level. NXP's datasheet notes that using the product beyond NXP's stated automotive specifications places responsibility on the customer, so for safety-relevant modules verify the qualification status of the exact orderable variant. The OE pin permits the diagnostic MCU to isolate the bus during fault scanning.
推荐
Open-Drain Status and Interrupt Lines
Interrupt, fault, and ready signals are commonly open-drain and wire-AND connected; when such lines must cross between two voltage domains, the NTS0302JK translates them while preserving the wired-OR behavior. Its open-drain ports pull low actively on either side and release to each side's pull-up, so multiple interrupt sources on the low-voltage side can safely share one line into a 5 V controller, and vice versa. Because the translator is bidirectional with auto direction sensing, no per-line direction configuration is needed even when a signal changes role dynamically. Size the pull-up to dominate total line capacitance for the required rise time, and consider the OE input as a global mask for the interrupt tree.
推荐
Portable and Battery-Powered Devices
Battery products often combine a low-voltage (1.8 V) application processor with 3.3 V accessories such as EEPROM, fuel gauges, or touch controllers; the NTS0302JK provides the two-line translation bridge in a minimal footprint. The independent VCCA and VCCB pins allow the peripheral domain to be switched off entirely for power savings while the processor domain remains alive, and the OE input can tri-state the ports during sleep to eliminate leakage through the translator. Because the part is a passive-style open-drain translator, it consumes no static current beyond input leakage when the bus is idle high, which matters for microamp-level sleep budgets in wearables and metering products.
推荐
Industrial Sensor Interfaces
Industrial sensors and actuators still default to 5 V signaling while modern controllers run at 3.3 V, so a 2-bit translator such as the NTS0302JK is commonly placed at the module connector to bridge clock/data or status lines. The open-drain tolerance approach means a 5 V slave inadvertently driving the bus cannot force 5 V onto the 3.3 V controller pins - the translator's pull-up side clamps the low-voltage domain at its own rail. The wide supply architecture accommodates rail tolerance in electrically noisy factory environments, and the OE pin supports hot-swap of sensor pods by isolating the bus until the module is fully seated and powered.
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推荐产品汇总
工程参考数据： NTS0302JK ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | NTS0302JKZ |
|---|---|---|
| Package | NXP small-outline package (JK suffix) - see datasheet pinning page | Same package as NTS0302JK |
| Brand | NXP Semiconductors | NXP Semiconductors |
| Number of Bits | 2 | 2 |
| Output Structure | Open drain | Open drain |
| Direction Control | Auto direction sensing | Auto direction sensing |
| Output Enable (OE) | Yes | Yes |
| Dual Supply (VCCA/VCCB) | Yes, independent supplies | Yes, independent supplies |
关键差异点
- Open-drain ports for true I2C-style translation （对比 NTS0102 (push-pull family))
- Auto direction sensing eliminates DIR firmware （对比 74LVC245-style direction-controlled buffers)
- Independent dual supplies enable flexible rail combinations （对比 NTS0302JKZ (same device))
设计说明
Place the pull-up resistors for the A-side and B-side close to the NTS0302JK ports, and route the two translated nets as short, direct traces to limit added capacitance, because open-drain rise time is set by R_pullup x C_bus. Choose 1% pull-up values so the high level sits clearly above the receiver VIH on each side. Since the part is a small-outline package, use a standard SMD footprint from the datasheet pinning page and keep the OE trace away from fast-switching lines to avoid unintended enabling noise coupling.
Decouple VCCA and VCCB independently with 100 nF ceramic capacitors placed within a few millimeters of each pin, because the two domains can host different noise environments. If either supply may power down while the other remains alive, verify the partial power-down current limits in the NXP datasheet before enabling back-powering paths. Estimated: with only pull-up DC load (e.g., 3.3 V through 4.7k ohm) the per-port sink current is roughly 0.7 mA, well within typical translator ratings, but always sum all simultaneously-low ports.
Do not treat the NTS0302JK as a push-pull buffer: with open-drain ports and no pull-ups, signals will float and auto direction sensing will become indeterminate. If OE is hard-wired high (a pattern confirmed on the NXP Community forum), remember the ports are active during both supply rails' power-up, so ensure the low-voltage side can tolerate the early bus state or gate OE with a supervisor. Finally, do not assume pin compatibility with other NXP 2-bit translators such as NTS0102 - verify the pinning page for the JK package before reusing a footprint.
合规信息
RoHS compliance per NXP product listing; NXP datasheet contains automotive-use disclaimer but explicit AEC-Q100 qualification status for this suffix is not stated in retrieved data.
