NTS0308EPWJ - 8-Bit Auto-Direction Level Translator | NXP
料号： NTS0308EPWJ ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.02 | $1.02 |
| 10 | $0.92 | $9.20 |
| 100 | $0.78 | $78.00 |
| 500 | $0.66 | $330.00 |
| 1,000 | $0.55 | $550.00 |
NTS0308EPWJ 概述
A dual-supply level translator is a power management and interface device that bridges digital circuits operating at different voltage domains, for example a 1.8 V microcontroller communicating with a 3.3 V sensor. Within the signal-integrity hierarchy, the NTS0308E belongs to the level translator family, a subcategory of interface ICs (logic translators), which sit above simple buffers in complexity because they must manage two independent supply rails and direction control.
Key differentiating features include auto direction sensing, which eliminates the need for a direction-control pin because each I/O automatically detects whether it should act as an input or output; open-drain outputs, which allow the device to work with I2C-style pull-up buses and mixed-voltage open-drain signalling; and a single output-enable (OE) input that tri-states all eight channels for power savings. The wide 0.95 V VCC(A) floor supports emerging sub-1.2 V logic cores.
Architecturally, each of the eight A/B ports uses a one-bit input-output cell that senses the applied voltage level and drivers, sourcing current only during rising edges to limit dynamic supply current - a technique that also permits use with pull-up resistors on partially powered buses. The open-drain structure means external pull-up resistors set the high level at each side, giving designers full flexibility over bus levels.
Typical applications include I2C and SMBus bus level shifting between 1.8 V, 2.5 V, and 3.3 V domains, interfacing low-voltage microcontrollers to 3.3 V peripherals, mixed-voltage open-drain bus translation in industrial and automotive body-electronics modules, and general-purpose 8-bit bidirectional level shifting in consumer and IoT hardware.
Design-wise, note that because outputs are open drain, pull-up resistors are mandatory and effective data rate falls as pull-up resistance and bus capacitance rise; the 20 Mbps figure assumes light RC loading. Keep VCC(A) and VCC(B) decoupled with 0.1 uF ceramics close to the pins.
This page adds value beyond the manufacturer datasheet by consolidating distributor pricing, drop-in alternative analysis, application-specific design notes, and AEO-optimized Q&A in one place.
直接替换替代料： NTS0308EPWJ ——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：
NTS0308EPW
✅ 直接替换📋 参考替代料（不在目录中）
NTS0108EPWJ
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
NTB0108EPWJ
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
NTS0308EPWJ 规格参数
| 功能 | 8-bit dual-supply translating transceiver |
| 输出类型 | Open drain |
| Direction Control | Auto direction sensing |
| 通道数 | 8 bidirectional |
| Max Data Rate | 20 Mbps |
| VCC(A) Supply Range | 0.95 V to 3.6 V |
| VCC(B) Supply Range | 1.0 V to 3.6 V |
| Output Enable | Yes (OE input, tri-states all channels) |
| 封装 | TSSOP-20 (PW) |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
| Packaging | Tape & Reel (suffix J) |
| Datasheet Revision | Rev. 1.2 - 17 March 2025 |
| 分类 | Specialty logic, level translators |
NTS0308EPWJ 引脚配置
| 引脚 1 | A1 — 8-bit port A, data 1 (open-drain I/O) |
| 引脚 2 | A2 — 8-bit port A, data 2 (open-drain I/O) |
| 引脚 3 | A3 — 8-bit port A, data 3 (open-drain I/O) |
| 引脚 4 | A4 — 8-bit port A, data 4 (open-drain I/O) |
| 引脚 5 | A5 — 8-bit port A, data 5 (open-drain I/O) |
| 引脚 6 | A6 — 8-bit port A, data 6 (open-drain I/O) |
| 引脚 7 | A7 — 8-bit port A, data 7 (open-drain I/O) |
| 引脚 8 | A8 — 8-bit port A, data 8 (open-drain I/O) |
| 引脚 9 | GND — Ground (0 V) |
| 引脚 10 | OE — Output enable input; LOW tri-states all channels |
| 引脚 11 | B8 — 8-bit port B, data 8 (open-drain I/O) |
| 引脚 12 | B7 — 8-bit port B, data 7 (open-drain I/O) |
| 引脚 13 | B6 — 8-bit port B, data 6 (open-drain I/O) |
| 引脚 14 | B5 — 8-bit port B, data 5 (open-drain I/O) |
| 引脚 15 | B4 — 8-bit port B, data 4 (open-drain I/O) |
| 引脚 16 | B3 — 8-bit port B, data 3 (open-drain I/O) |
| 引脚 17 | B2 — 8-bit port B, data 2 (open-drain I/O) |
| 引脚 18 | B1 — 8-bit port B, data 1 (open-drain I/O) |
| 引脚 19 | VCC(B) — Supply voltage for port B, 1.0 V to 3.6 V |
| 引脚 20 | VCC(A) — Supply voltage for port A, 0.95 V to 3.6 V |
典型应用
NTS0308EPWJ 适用于 6 应用s: I2C / SMBus Level Shifting, Low-Voltage MCU to 3.3 V Peripherals, Mixed-Voltage Open-Drain Buses in Automotive Body Electronics, Partial-Power / Hot-Plug Domains, Industrial Sensor and Actuator Interfaces, Consumer and IoT Mixed-Voltage Boards.
I2C / SMBus Level Shifting
The NTS0308EPWJ is a natural fit for I2C and SMBus level translation because its open-drain architecture mirrors the wired-AND structure of these buses. With pull-up resistors tied to VCC(A) on one side and VCC(B) on the other, SDA and SCL (plus up to six more bus lines across the eight channels) translate cleanly between domains such as 1.8 V and 3.3 V. Auto direction sensing removes any need for a DIR pin on the bidirectional SDA line, and the one-bit I/O cells source current only on rising edges, minimizing dynamic current draw on heavily loaded buses. Effective throughput tracks pull-up resistance and bus capacitance, so keep pull-ups in the 1 kOhm to 4.7 kOhm range for fast-mode operation.
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Low-Voltage MCU to 3.3 V Peripherals
Modern microcontroller I/O banks often run at 1.2 V or 1.8 V while sensors, memories, and radios remain at 3.3 V. The NTS0308EPWJ bridges this gap with VCC(A) down to 0.95 V - one of the lowest floors among 8-bit translators - and VCC(B) up to 3.6 V. Eight channels in one 20-pin TSSOP translate an entire byte-wide peripheral interface (address, data, or control lines) in a 6.4 mm x 4.4 mm footprint. Because outputs are open drain, the high level on each side is set by its own pull-up rail, giving full flexibility when a peripheral's VIH is unusual. The 20 Mbps ceiling comfortably covers GPIO-style control signaling and mid-speed parallel interfaces used in industrial and IoT boards.
推荐
Mixed-Voltage Open-Drain Buses in Automotive Body Electronics
Automotive body-control modules frequently mix legacy 5 V-tolerant 3.3 V nodes with newer 1.8 V domains on shared open-drain lines such as LIN-adjacent status buses, diagnostics flags, and switch-matrix lines. The NTS0308EPWJ's open-drain outputs cannot back-drive another node's driver, a critical safety property on multi-master shared lines, while auto direction sensing lets any node transmit without a central arbiter controlling direction. The OE pin allows the module to tri-state all eight channels during fault conditions or power-up sequencing. NXP's automotive heritage in body electronics makes this translator a common fit alongside S12 and SPC5 MCU families in these modules.
推荐
Partial-Power / Hot-Plug Domains
The NTS0308E architecture tolerates domains that power up at different times or that are partially powered, because the I/O cells do not forward-bias into an unpowered rail and draw minimal back-channel current. This makes the NTS0308EPWJ suitable for backplanes, docking systems, and modular instrumentation where cards are inserted live and one side of the translator may be unpowered. Per the NXP datasheet, the driver sources current only during rising edges, limiting shoot-through into low-impedance loads during hot insertion. Designers should still sequence VCC(A) before VCC(B) where practical and verify OE is held low until both rails are stable to keep all channels high-impedance during plug events.
推荐
Industrial Sensor and Actuator Interfaces
Factory automation boards commonly combine 3.3 V logic with 5 V-tolerant field wiring front ends or 1.8 V DSP cores. The NTS0308EPWJ translates eight status and control lines between these domains in a single surface-mount package, and its open-drain outputs can be pulled up to whichever rail each side requires - including higher-voltage pull-ups within the 3.6 V rating. The 20 Mbps rating covers encoder quadrature feedback and general I/O update rates typical of PLC I/O cards. Because the part is a transceiver, the same device handles both sensor inputs and actuator outputs on shared lines, cutting BOM count versus per-channel discrete transistor shifters and improving channel-to-channel matching.
推荐
Consumer and IoT Mixed-Voltage Boards
In consumer hardware - smart-home hubs, wearables, and appliance controllers - cost and board area dominate. One NTS0308EPWJ replaces eight discrete two-transistor shifter cells, saving area and assembly cost while guaranteeing matched propagation across channels. The 0.95 V VCC(A) floor supports newest battery-powered SoCs running at 0.95-1.2 V, while open-drain outputs directly serve I2C links to sensors. The OE pin enables a low-power state, tri-stating all channels when the translated bus is unused, which matters in battery-operated products. With RoHS compliance and Tape & Reel packaging, the part integrates cleanly into high-volume SMT assembly lines.
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推荐产品汇总
工程参考数据： NTS0308EPWJ ——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 | NTS0308EPW | NTS0108EPWJ | NTB0108EPWJ |
|---|---|---|---|---|
| Package | TSSOP-20 (PW) | TSSOP-20 (PW) - same | TSSOP-20 (PW) - same | TSSOP-20 (PW) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Bits / Channels | 8 bidirectional | 8 bidirectional | 8 bidirectional | 8 bidirectional |
| Output Type | Open drain | Open drain | Push-pull | Push-pull |
| Direction Control | Auto direction sensing | Auto direction sensing | Auto direction sensing | Auto direction sensing |
关键差异点
- True open-drain translation for shared buses （对比 NTS0108EPWJ)
- Active continuation of an EOL part （对比 NTS0308EPW)
- Edge-current-only driving reduces dynamic power on loaded buses （对比 NTB0108EPWJ)
设计说明
Open-drain outputs mean the NTS0308EPWJ never actively drives high - omitting pull-up resistors leaves the bus floating. Size pull-ups for the target edge rate: with 50 pF bus capacitance and 2 kOhm pull-up, the RC time constant is about 100 ns, supporting fast I2C rates; with 10 kOhm the same bus is limited to roughly 100 kbps-class signaling. Also remember the effective data rate of 20 Mbps assumes light RC loading.
Decouple VCC(A) and VCC(B) each with a 0.1 uF ceramic capacitor placed within 5 mm of the pins, plus one bulk capacitor per rail. Because the one-bit I/O cells source current only during rising edges, dynamic supply current is proportional to edge rate and load capacitance, not static switching frequency - but bursty bus activity can still create rail droop without adequate local decoupling. Hold OE low until both rails are stable to prevent undefined output states during power-up.
Route port A traces away from port B traces where possible to reduce capacitive crosstalk between translated domains; keep stubs short on open-drain lines since reflections degrade open-drain edges more than push-pull ones. The TSSOP-20 lead pitch of 0.65 mm is hand-solderable and the footprint is shared across the NXP 8-bit translator family, so laying out for NTS0308EPWJ keeps NTS0108/NTB0108 push-pull variants available as footprints-compatible fallbacks.
合规信息
RoHS compliant per NXP/DigiKey product listings. REACH, halogen-free, and conflict-minerals status not stated in provided data.
