74LVC1G3157GW - 10Ω SPDT Analog Switch | Nexperia 6-TSSOP
料号： 74LVC1G3157GW ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0.42 | $0.42 |
| 10 | $0.36 | $3.60 |
| 100 | $0.24 | $24.00 |
| 500 | $0.18 | $90.00 |
| 1,000 | $0.14 | $140.00 |
| 3,000 | $0.11 | $330.00 |
74LVC1G3157GW 概述
An analog switch (also called a bilateral switch or pass gate) is a semiconductor device that uses MOSFET transistors to route analog or digital signals between multiple paths under digital control. The 74LVC1G3157 sits in the broader hierarchy of: analog switch → multiplexer/demultiplexer → interface IC → integrated circuit → semiconductor. Single-pole double-throw switches like this are the simplest multiplexers and form the foundation of signal routing in mixed-signal systems, providing isolation between channels, level shifting between voltage domains, and dynamic signal path selection.
Key features include very low ON resistance of 7.5Ω typical at VCC=2.7V, 6.5Ω typical at VCC=3.3V, and 6Ω typical at VCC=5V, with ESD protection exceeding 2000V HBM per JESD22-A114F. The device offers high noise immunity CMOS construction, TTL interface compatibility at 3.3V, and CMOS low power consumption. Latch-up performance meets JESD 78 Class I requirements, ensuring robust operation in demanding environments.
The 74LVC1G3157 employs a parallel MOSFET topology where the select input (S) drives complementary gate signals to connect the common terminal (Z) to either Y0 or Y1. This architecture delivers excellent signal fidelity across the full analog input range (0V to VCC) with minimal distortion. The break-before-make switching eliminates momentary shorts between Y0 and Y1 during transitions, protecting source and downstream circuitry.
Typical applications include signal routing in portable consumer devices, audio source switching in headsets, USB signal multiplexing, GPIO expansion in microcontrollers, and voltage domain translation between 1.8V, 3.3V, and 5V systems. The wide supply range and TTL-compatible inputs make this part ideal for bridging legacy 5V peripherals with modern 1.8V processors.
When designing with this device, ensure VCC is well-decoupled with a 100nF ceramic capacitor placed close to the supply pin. The analog signal range is rail-to-rail (0V to VCC), but exceeding VCC on any signal pin will forward-bias the ESD protection diodes. For hot-plug applications, add series resistance to limit inrush current.
直接替换替代料： 74LVC1G3157GW ——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： 74LVC1G3157GW （相同外形与封装尺寸） ——差异在于 Function, Package.
快速对比工具——选择替代料号进行并排对比：
74LVC1G3157GM
✅ 直接替换📋 参考替代料（不在目录中）
74LVC1G3157GW-Q100
✅ 直接替换📋 参考替代料（不在目录中）
74LVC1G3157GW,125
✅ 直接替换📋 参考替代料（不在目录中）
SN74LVC1G3157DCKR
✅ 直接替换✓ 有现货
$0.22 / 个
查看数据手册 →SN74LVC1G3157DRYR
✅ 直接替换📋 参考替代料（不在目录中）
TS5A3157DCKR
✅ 直接替换📋 参考替代料（不在目录中）
74LVC1G3157GW 最大额定值与电气特性
| 功能 | Single-Pole Double-Throw (SPDT) Analog Switch / 2:1 Multiplexer |
| Number of Channels | 1 |
| On Resistance (RON) | 10 Ω (typical) |
| ON Resistance at VCC=2.7V | 7.5 Ω (typical) |
| ON Resistance at VCC=3.3V | 6.5 Ω (typical) |
| ON Resistance at VCC=5V | 6 Ω (typical) |
| Supply Voltage (VCC) | 1.65 V to 5.5 V |
| Switch Current Capability | 32 mA |
| Switching Type | Break-before-make |
| Input Compatibility | 3.3 V and 5 V TTL/CMOS control inputs |
| ESD Protection (HBM) | Exceeds 2000 V per JESD22-A114F |
| Latch-up Performance | Meets JESD 78 Class I |
| 工作温度 | -40 °C to +125 °C |
| 封装 | TSSOP-6 (SOT363, SC-88) |
| 安装类型 | Surface Mount |
| MSL 等级 | 1 (unlimited) |
| RoHS 状态 | Compliant |
74LVC1G3157GW 引脚配置
| 引脚 1 | Y0 — Channel 0 input/output (selected when S=LOW) |
| 引脚 2 | GND — Ground reference |
| 引脚 3 | Y1 — Channel 1 input/output (selected when S=HIGH) |
| 引脚 4 | Z — Common input/output terminal |
| 引脚 5 | VCC — Supply voltage (1.65V to 5.5V) |
| 引脚 6 | S — Digital select input |
典型应用
74LVC1G3157GW 适用于 7 应用s: Portable Audio Source Switching, Voltage Domain Translation Between 1.8V and 3.3V, USB Signal Multiplexing, GPIO Expansion in Microcontroller Systems, Industrial Control Signal Routing, Automotive Infotainment Signal Switching, Test and Measurement Equipment.
Portable Audio Source Switching
The 74LVC1G3157GW is ideal for routing analog audio signals between two sources (such as Bluetooth receiver and wired input) in portable headsets and portable media players. Its 10Ω typical ON resistance at VCC=3.3V introduces negligible insertion loss for headphone-level signals, while the 32 mA switch current capability supports line-level audio without distortion. The break-before-make switching eliminates audible pops and clicks during source transitions, and the 1.65V-5.5V supply range matches Li-ion battery operation directly. Place the part between the audio CODEC ADC input and the two source amplifiers, with VCC tied to the system 3.3V rail and the select input driven by a GPIO.
推荐
Voltage Domain Translation Between 1.8V and 3.3V
The 74LVC1G3157GW functions as a 1.65V-5.5V tolerant signal router, ideal for bridging modern 1.8V processors with 3.3V peripherals. The control inputs (S) accept 3.3V logic levels regardless of VCC, allowing a 3.3V GPIO to control a switch running on 1.8V VCC. According to the Nexperia datasheet, signal paths (Y0/Y1/Z) clamp to within VCC, providing implicit level shifting for serial data lines such as I2C, UART, or SPI chip selects when configured between two voltage domains. This eliminates dedicated level-shifter ICs in mixed-voltage designs, saving both PCB area and BOM cost.
推荐
USB Signal Multiplexing
The 74LVC1G3157GW supports low-speed USB 1.1 signal routing at 12 Mbps and full-speed USB at 12 Mbps in OTG and dual-role port applications. Its 10Ω ON resistance and 32 mA current capability comfortably handle USB differential pair switching at 3.3V VCC, while the break-before-make action prevents bus contention when swapping between host and device controllers. Place the switch on the D+/D- lines with VCC tied to the USB 3.3V rail; the select input can be driven by an OTG ID pin comparator. The 6-pin TSSOP footprint simplifies routing under USB connectors on dense mobile phone PCBs.
推荐
GPIO Expansion in Microcontroller Systems
The 74LVC1G3157GW enables a single microcontroller GPIO to dynamically select between two sensor inputs or peripheral connections, effectively doubling GPIO utilization without software multiplexing overhead. According to the Nexperia datasheet, the part's sub-nanosecond propagation delay and 32 mA switch current are sufficient for digital sensor selection (I2C bus switches, SPI MISO arbitration), while the analog signal path supports sensor analog outputs up to VCC. Connect Y0 to Sensor A, Y1 to Sensor B, Z to the MCU ADC input or digital bus, and drive S from an MCU GPIO.
推荐
Industrial Control Signal Routing
The 74LVC1G3157GW suits industrial PLCs, sensor interfaces, and 4-20 mA current loop switching applications due to its wide 1.65V-5.5V supply, 32 mA switch current, and -40°C to +125°C operating temperature range. The 10Ω ON resistance adds minimal error to 4-20 mA loops when used as a shunt or range-selection switch, while ESD protection exceeding 2000V HBM provides robustness against factory-floor transients. Industrial designers favor the TSSOP-6 package for its hand-solderable leads during prototyping and field rework.
推荐
Automotive Infotainment Signal Switching
The automotive-qualified 74LVC1G3157GW-Q100 variant enables infotainment source switching between AM/FM tuner, Bluetooth audio, USB, and auxiliary inputs. Its AEC-Q100 qualification and 10Ω RON preserve audio fidelity across multiple source types, while the small TSSOP-6 footprint fits densely populated head-unit PCBs. The break-before-make switching prevents audible glitches during source changes, and the wide VCC range supports direct connection to 3.3V or 5V audio CODEC rails. Automotive system designers pair this switch with Class-D amplifiers and digital audio processors.
推荐
Test and Measurement Equipment
The 74LVC1G3157GW provides signal-path selection in benchtop multimeters, oscilloscope input multiplexers, and data acquisition systems where its 10Ω ON resistance and rail-to-rail analog signal range preserve measurement accuracy. The break-before-make action prevents cross-connection between measurement channels during range or input switching, and the TTL-compatible select input interfaces directly with MCU or FPGA control logic. The 6-pin TSSOP package supports high-density channel-per-board designs typical of modular instruments.
推荐
推荐产品汇总
工程参考数据： 74LVC1G3157GW ——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 | 74LVC1G3157GM | SN74LVC1G3157DCKR | TS5A3157DCKR |
|---|---|---|---|---|
| Brand | Nexperia | Nexperia | Texas Instruments | Texas Instruments |
| Package | TSSOP-6 (SOT363) | XQFN-6 (SOT886) | SC-70-6 (DCK) | SC-70-6 (DCK) |
| Function | SPDT 2:1 analog switch | SPDT 2:1 analog switch | SPDT 2:1 analog switch | SPDT 2:1 analog switch |
| ON Resistance (typ) | 10 Ω | 10 Ω | 10 Ω | 10 Ω |
| Supply Voltage | 1.65 V to 5.5 V | 1.65 V to 5.5 V | 1.65 V to 5.5 V | 1.65 V to 5.5 V |
| Switch Current | 32 mA | 32 mA | 32 mA | 32 mA |
| Switching Action | Break-before-make | Break-before-make | Break-before-make | Break-before-make |
| Automotive Qualified | No (Q100 variant available) | No | No | No |
关键差异点
- Nexperia original with widest second-source ecosystem （对比 SN74LVC1G3157DCKR (TI))
- Lower ON resistance than competing HC-family switches （对比 74HC4053 (multi-channel MUX))
- Automotive grade option with same footprint （对比 74LVC1G3157GW (standard))
设计说明
Decouple VCC with a 100nF X7R ceramic capacitor placed within 2-3 mm of the VCC pin. The 74LVC1G3157GW draws negligible quiescent current (<1 µA typical), but the VCC pin can see momentary current spikes during switching transitions; a local bypass capacitor suppresses supply noise that could couple into the analog signal path. For mixed-voltage designs, the VCC pin sets both the analog signal range (0V to VCC) and the switch ON resistance — running VCC closer to 5V minimizes RON but reduces headroom for low-voltage logic compatibility.
The 10 Ω ON resistance combined with capacitive loading can form an RC low-pass filter with a -3dB cutoff of f_c = 1/(2π × R_ON × C_load). At VCC=3.3V with 10pF load (typical USB or audio line), f_c ≈ 1.6 GHz, far above most analog switch applications, but at 100pF load (long PCB trace or scope probe) f_c drops to 160 MHz. For high-speed signals above 100 MHz, consider the ON resistance flatness across the analog signal range — Nexperia's 74LVC1G3157 maintains RON within ±2 Ω from rail to rail, minimizing distortion in audio paths.
Avoid driving any signal pin (Y0, Y1, Z) above VCC or below GND; the internal ESD diodes will forward-conduct and inject current into the supply rail, potentially latching up the device or damaging the source driver. For hot-plug or unknown-source applications, add a 1 kΩ series resistor on each signal pin to limit ESD diode current to safe levels. Also ensure the select input S has a defined logic level during power-up; if S floats, the switch may oscillate between Y0 and Y1 during VCC ramp, causing transient short currents.
合规信息
Base 74LVC1G3157GW is not AEC-Q100 qualified; choose 74LVC1G3157GW-Q100 for automotive. RoHS and REACH compliant per Nexperia product page. Halogen-free per Nexperia green product statement.
