NC7SV125P5X - TinyLogic ULP-A Non-Inverting 3-State Buffer, SC-70-5 | onsemi
料号： NC7SV125P5X ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0.45 | $0.45 |
| 10 | $0.38 | $3.80 |
| 100 | $0.27 | $27.00 |
| 500 | $0.21 | $105.00 |
| 1,000 | $0.18 | $180.00 |
| 3,000 | $0.15 | $450.00 |
NC7SV125P5X 概述
A 3-state buffer (also called a tri-state buffer, line driver, or bus driver) is a single-input/single-output non-inverting logic device whose output can be placed in one of three states: logic high, logic low, or high-impedance (Hi-Z). Buffers are the simplest members of the Logic ICs category, sitting hierarchically below gates, transceivers, and bus switches. Their primary function is signal isolation, level shifting, bus arbitration, and output drive-strength amplification on shared digital lines such as microcontroller I/O buses, memory data lines, and peripheral interconnects.
Key specifications of the NC7SV125P5X include a wide VCC range of 0.9 V to 3.6 V, ±24 mA output drive at 3.3 V VCC, low quiescent current typically below 1 µA, and a propagation delay in the low-nanosecond range that supports high-speed digital interfaces. The 3-state output is controlled by an active-low output enable (OE\) pin; when OE\ is high the output enters Hi-Z, allowing multiple devices to share a common bus. The SC-70-5 package measures approximately 2.0 mm x 1.25 mm, making it one of the smallest logic footprints available.
Architecturally the device uses a minimum-stage CMOS inverter chain, which is why propagation delay is extremely short and dynamic power scales linearly with load capacitance and switching frequency. The NC7SV125P5X is specified over the industrial -40 °C to +85 °C temperature range and is fully RoHS compliant, with Pb-free lead finish and a Moisture Sensitivity Level (MSL) of 1, simplifying handling and board assembly.
Typical applications include mobile phones, tablets, wearable electronics, IoT sensor nodes, handheld instruments, and any battery-powered product that needs bus isolation or output drive amplification in a sub-3 mm² footprint. Designers favor this part when board real estate is at a premium and a low-power, rail-to-rail CMOS buffer is required.
When designing with the NC7SV125P5X, place input and output decoupling capacitors (typically 0.1 µF) close to the VCC and GND pins to limit supply-rail bounce during high-speed switching. Always keep the OE\ pin at a defined logic level; floating enables can cause shoot-through current and unwanted output toggling.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, helping engineers quickly decide whether the NC7SV125P5X is the right 3-state buffer for their next low-power, space-constrained design.
直接替换替代料： NC7SV125P5X ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： NC7SV125P5X （相同外形与封装尺寸） ——差异在于 MSL Level, Operating Temperature, Output Type, Package, RoHS Status.
快速对比工具——选择替代料号进行并排对比：
NC7SV125P5XCT-ND
✅ 直接替换📋 参考替代料（不在目录中）
NC7SV125L6X
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
NC7SP125P5X
✅ 直接替换📋 参考替代料（不在目录中）
NC7SV125P5X_Q
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
SN74LVC1G125DCKR
✅ 直接替换📋 参考替代料（不在目录中）
SN74AUP1G125DCKR
✅ 直接替换📋 参考替代料（不在目录中）
74LVC1G125GW
✅ 直接替换📋 参考替代料（不在目录中）
NC7SV125P5X 最大额定值与电气特性
| Manufacturer | onsemi |
| Series | TinyLogic ULP-A |
| Logic Type | Buffer, Non-Inverting |
| Number of Elements | 1 |
| Number of Bits per Element | 1 |
| 输出类型 | 3-State (Tri-State) |
| VCC Supply Voltage | 0.9 V to 3.6 V |
| Output Drive (IOH/IOL) at 3.3 V VCC | ±24 mA |
| 工作温度 | -40 °C to +85 °C |
| 封装 | SC-70-5 |
| 安装类型 | Surface Mount |
| MSL 等级 | 1 (unlimited floor life) |
| RoHS 状态 | Compliant |
| Lead-Free / Pb-Free | Yes |
| Output Enable (OE\) Polarity | Active-Low (OE\ high = Hi-Z output) |
NC7SV125P5X 引脚配置
| 引脚 1 | OE\ — Output Enable input (active-low) |
| 引脚 2 | IN — Data input |
| 引脚 3 | GND — Ground reference |
| 引脚 4 | OUT — 3-state data output |
| 引脚 5 | VCC — Supply voltage (0.9 V to 3.6 V) |
典型应用
NC7SV125P5X 适用于 6 应用s: Wearable Fitness Tracker MCU Bus Isolation, IoT Sensor Node Output Drive Buffer, Mobile Handset Peripheral Enable / Level Shift, Handheld Test and Measurement Front-End, Hearing Aid and Medical Patch Signal Routing, Industrial Sensor Module I/O Expansion.
Wearable Fitness Tracker MCU Bus Isolation
The NC7SV125P5X is well suited as a bus-isolation buffer between a low-power BLE SoC and shared I/O lines in a wearable fitness tracker. Its 0.9 V to 3.6 V VCC range matches coin-cell-powered rails, the sub-1 µA quiescent current preserves battery life during deep sleep, and the SC-70-5 footprint of 2.0 mm x 1.25 mm fits within the tight PCB real estate of a wristband. The active-low OE\ pin allows the SoC to disconnect downstream sensors when not in use, eliminating leakage paths and reducing system-level sleep current. Compared to discrete FET-based isolation, the integrated buffer provides faster edge rates and well-defined logic thresholds.
推荐
IoT Sensor Node Output Drive Buffer
In battery-powered IoT sensor nodes (temperature, humidity, motion, air-quality), the NC7SV125P5X amplifies the low-current GPIO output of a low-power MCU to drive an external load such as a LoRa modem reset line, a sensor enable pin, or a long PCB trace to a remote antenna. The ±24 mA output drive at 3.3 V VCC comfortably sinks the inrush current of peripherals during power-up, while the SC-70-5 footprint keeps the BOM compact for miniaturized sensor PCBs. The active-low OE\ pin enables firmware-controlled peripheral shutdown to extend battery life in duty-cycled sensing applications.
推荐
Mobile Handset Peripheral Enable / Level Shift
In a mobile handset the NC7SV125P5X serves as a logic-level buffer or one-way level shifter between a 1.8 V application processor and 3.3 V peripherals such as camera modules, sensors, or haptic drivers. The 3-state output allows the same data line to be shared with another device under PMIC arbitration, while the wide VCC range accepts the most common mobile rails. The SC-70-5 footprint suits the dense main board layout, and the MSL-1 rating simplifies high-volume SMT production with no dry-pack handling requirement.
推荐
Handheld Test and Measurement Front-End
In a handheld digital multimeter, oscilloscope, or logic analyzer, the NC7SV125P5X isolates the analog front-end from the digital display controller, preventing digital switching noise from corrupting sensitive measurement channels. The high drive strength allows the buffer to drive a long flex-cable between the probe tip and the display PCB, while the low quiescent current preserves battery runtime. The 3-state output also enables test engineers to multiplex multiple measurement channels onto a single ADC input without contention.
推荐
Hearing Aid and Medical Patch Signal Routing
In ultra-miniaturized medical and hearing-aid designs, the NC7SV125P5X provides digital signal routing in a 2.0 mm x 1.25 mm SC-70-5 footprint that fits within the in-ear canal housing. The 0.9 V lower VCC bound supports direct battery operation from a zinc-air cell, and the sub-1 µA quiescent current extends device lifetime on a single battery. The 3-state output enables the DSP to time-multiplex multiple microphones onto a single ADC input, reducing the analog signal-chain component count and PCB area.
推荐
Industrial Sensor Module I/O Expansion
In industrial sensor modules (4-20 mA transmitters, RTD conditioners, process controllers), the NC7SV125P5X buffers GPIO lines between the isolated low-voltage domain and the field-side digital interface. The industrial -40 °C to +85 °C operating range covers most factory environments, while the SC-70-5 footprint allows placement in compact DIN-rail module enclosures. The active-low OE\ pin provides a hardware-level safety interlock that brings outputs to Hi-Z during firmware fault conditions or during field-side maintenance.
推荐
推荐产品汇总
工程参考数据： NC7SV125P5X ——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 | NC7SV125L6X | NC7SP125P5X | SN74LVC1G125DCKR | SN74AUP1G125DCKR | 74LVC1G125GW |
|---|---|---|---|---|---|---|
| Brand | onsemi | onsemi | onsemi | Texas Instruments | Texas Instruments | Nexperia |
| Package | SC-70-5 | SC-70-5 (MicroPak-6) | SC-70-5 - same | SC-70-5 (DCK) - same | SC-70-5 (DCK) - same | SC-88/SC-70-5 - same |
| VCC Range | 0.9 V to 3.6 V | 0.9 V to 3.6 V | 0.9 V to 3.6 V | 1.65 V to 5.5 V | 0.8 V to 3.6 V | 1.65 V to 5.5 V |
| Output Drive (at 3.3 V) | ±24 mA | ±24 mA | ±20 mA (slightly lower) | ±32 mA (higher) | ±4 mA (lower power) | ±32 mA |
| Output Enable Polarity | Active-Low (OE\) | Active-Low (OE\) | Active-Low (OE\) | Active-Low (OE\) | Active-Low (OE\) | Active-Low (OE\) |
| Logic Family | TinyLogic ULP-A (CMOS) | TinyLogic ULP-A | TinyLogic ULP | LVC (Low-Voltage CMOS) | AUP (Advanced Ultra-Low-Power) | LVC (Low-Voltage CMOS) |
| Operating Temperature | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +125 °C (wider) | -40 °C to +85 °C | -40 °C to +125 °C (wider) |
| RoHS Compliance | Yes | Yes | Yes | Yes | Yes | Yes |
关键差异点
- Sub-1.0 V VCC operation enables direct battery connection （对比 SN74LVC1G125DCKR)
- Industry-standard TinyLogic ULP-A architecture （对比 NC7SP125P5X)
- Active-low OE\ matches industry-standard 74LVC1G125 control logic （对比 NC7SV126P5X)
设计说明
Place a 0.1 µF X7R ceramic decoupling capacitor as close as possible to the VCC pin (pin 5) and GND pin (pin 3) of the NC7SV125P5X, with the trace length kept below 2 mm to limit supply-rail inductance. Although the TinyLogic ULP-A family has very low quiescent current, dynamic switching current spikes during output transitions can momentarily sag the VCC rail if not bypassed locally. For applications with multiple NC7SV125P5X devices on a shared rail, add a bulk 1 µF to 10 µF capacitor at the rail entry point to handle the cumulative switching current. Per the onsemi datasheet, decoupling is especially important above 10 MHz switching rates where edge rates can otherwise couple noise into nearby analog circuitry.
The NC7SV125P5X is a 3-state buffer, so always drive the OE\ pin to a defined logic level - never leave it floating. A floating OE\ can drift into the input-threshold region, causing shoot-through current, output oscillation, and excessive power dissipation. Tie OE\ directly to GND through a 10 kΩ pulldown resistor if the buffer should be permanently enabled, or drive it actively from a microcontroller GPIO. The 3-state Hi-Z output allows bus sharing, but only one device should be enabled at a time on a shared line to avoid bus contention that can damage the part. Estimated: with VCC = 3.3 V and both outputs forced to opposite logic levels, peak contention current can exceed 50 mA, exceeding the 24 mA DC drive rating.
The SC-70-5 package measures 2.0 mm x 1.25 mm with a 0.65 mm pitch - use 0.3 mm to 0.4 mm trace widths and 0.2 mm via drills for escape routing. Keep the OE\ and IN traces short and away from high-frequency switching signals to minimize crosstalk, and route the VCC and GND traces on adjacent layers with stitched ground vias to provide a low-inductance return path. The thermal pad of the SC-70-5 (if present on the specific variant) should be soldered to a small copper pour to provide mechanical stability and to spread heat during sustained high-current switching.
Do not apply input voltages above VCC + 0.5 V or below -0.5 V to the IN or OE\ pins of the NC7SV125P5X, as this can trigger input-parasitic-diode conduction and cause latch-up. When using the buffer as a level translator between a 3.3 V domain and a 1.8 V domain, ensure VCC is powered before applying inputs from a higher-voltage domain to avoid back-powering through the input protection diodes. Also note that the part is a non-inverting buffer, not an inverter - if logic inversion is required, use the NC7SV14 or NC7SV04 from the same TinyLogic family instead.
合规信息
RoHS and REACH compliant per onsemi product page. Lead-free finish (Pb-free). MSL-1 rating simplifies SMT handling. Standard part is not AEC-Q100 qualified; AEC-Q100 qualified automotive variant is NC7SV125P5X_Q (sold separately).
