MCP4641-104E/ST - 100kΩ Dual 7-Bit I2C Digital Potentiometer
料号： MCP4641-104E/ST ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0.4214 | $0.42 |
| 10 | $0.4 | $4.00 |
| 100 | $0.35 | $35.00 |
| 500 | $0.3 | $150.00 |
| 1,000 | $0.27 | $270.00 |
MCP4641-104E/ST 概述
A digital potentiometer is an active resistor-network IC whose wiper position is controlled through a digital interface instead of a mechanical shaft. The MCP4641 belongs to the digital potentiometer hierarchy, which combines resistor networks, wiper switches, EEPROM-backed configuration, and serial control into a compact surface-mount component. Its I2C interface allows a microcontroller or other host controller to change resistance settings while the circuit remains in operation.
The MCP4641-104E/ST provides 129 wiper positions, corresponding to 7-bit resolution and a 128-resistor network per channel. Its nominal end-to-end resistance is 100 kΩ with a resistance tolerance of ±20%, according to the verified manufacturer and distributor data. Non-volatile EEPROM storage preserves the last programmed wiper configuration, reducing repeated setup after power cycling when the host supports the device’s memory functions.
The MCP464X family is designed around an EEPROM-backed architecture and supports potentiometer or rheostat use. The device can therefore be placed in signal paths where software-adjustable attenuation, current-limits, threshold, or gain correction is useful. Its 14-TSSOP package is suitable for compact embedded control boards, although the narrow package requires careful PCB layout and pin-level soldering.
Typical applications include audio volume control, sensor signal conditioning, programmable amplifier gain, industrial control interfaces, and portable equipment where a microcontroller needs to trim analog parameters digitally. The I2C bus allows centralized control of both channels, while EEPROM retention simplifies deterministic power-up behavior.
For robust design, verify the I2C address and bus pull-up requirements in the manufacturer datasheet, confirm the electrical limits for the selected terminal and wiper configuration, and route analog resistor-network terminals away from high-current switching nodes. This page consolidates verified distributor specifications, practical application guidance, and available replacement information for engineers evaluating the MCP4641-104E/ST.
直接替换替代料： MCP4641-104E/ST ——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：
MCP4641T-104E/ST
✅ 直接替换📋 参考替代料（不在目录中）
MCP4641-103E/ST
✅ 直接替换📋 参考替代料（不在目录中）
MCP4641-502E/ST
✅ 直接替换📋 参考替代料（不在目录中）
MCP4661-104E/ST
✅ 直接替换📋 参考替代料（不在目录中）
MCP4542T-503E/MF
✅ 直接替换📋 参考替代料（不在目录中）
MCP4641-104E/ST 最大额定值与电气特性
| Product Type | Dual-channel non-volatile digital potentiometer |
| Number of Circuits | 2 |
| End-to-End Resistance | 100 kΩ |
| Number of Wiper Steps | 129 |
| 分辨率 | 7-bit |
| Control Interface | I2C |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Resistance Tolerance | ±20% |
| Non-Volatile Memory | EEPROM |
| Configuration | Potentiometer or rheostat |
| Resistor Network | 128 resistors per channel |
| 封装 | 14-pin TSSOP |
| 安装类型 | Surface Mount |
| Manufacturer | Microchip Technology |
MCP4641-104E/ST 14-pin tssop 引脚配置指南
MCP4641-104E/ST（14-pin tssop 封装）的引脚配置。 该模拟元件具有输入、输出和电源引脚。请参阅制造商数据手册以了解失调调零、补偿和使能引脚配置。适用于信号调理和放大器电路。
暂无详细引脚数据： MCP4641-104E/ST.
请参阅 数据手册 以查看完整引脚配置。
典型应用
MCP4641-104E/ST 适用于 6 应用s: Audio Volume Control, Sensor Signal Conditioning, Programmable Amplifier Gain, Industrial Control Interfaces, Portable Equipment Calibration, Programmable Voltage Divider.
Audio Volume Control
The MCP4641-104E/ST fits audio volume-control paths because its two 100 kΩ resistor networks provide 129 programmable wiper positions over an I2C bus. A host microcontroller can adjust the attenuation setting without a mechanical potentiometer, while EEPROM can preserve a preferred configuration. The designer should verify signal swing, source impedance, and wiper behavior against the datasheet, and keep the analog path away from noisy switching stages.
推荐
Sensor Signal Conditioning
The device can implement programmable attenuation or threshold adjustment in sensor front ends where a fixed resistor is inconvenient. Its 7-bit, 129-step control gives the firmware a repeatable way to calibrate gain, compensate tolerances, or trim an analog input. The 100 kΩ network is useful when the source impedance is compatible with the resistor network, and the I2C interface allows adjustment during calibration without mechanical access.
推荐
Programmable Amplifier Gain
MCP4641-104E/ST can serve as a digitally adjustable element in gain-setting or feedback networks when the amplifier design permits its resistance and capacitance characteristics. Two channels allow independent coarse and fine adjustment or coordinated gain calibration through I2C. Because the target is a 7-bit device, the resulting adjustment resolution depends on the surrounding circuit; verify resistor-network accuracy, wiper impedance, and amplifier stability in the final design.
推荐
Industrial Control Interfaces
The MCP4641-104E/ST is suitable for industrial equipment that needs remote resistance adjustment, limit setting, or calibration over a control bus. Its 2.7 V to 5.5 V supply range supports common embedded rails, and the I2C interface simplifies connection to a microcontroller. Industrial use still requires checking the manufacturer’s temperature limits, noise performance, and isolation requirements; those values were not included in the verified search data.
推荐
Portable Equipment Calibration
The non-volatile MCP4641-104E/ST can store a wiper setting in EEPROM, which is useful in portable products where calibration values should survive power cycling. A low-power microcontroller can read or restore the configuration through I2C, reducing the need for user-accessible adjustment components. The design should include safe defaults, bus pull-ups, and recovery behavior if the controller resets before the calibration write completes.
推荐
Programmable Voltage Divider
The MCP4641-104E/ST can replace a mechanical potentiometer in a voltage-divider network when the downstream circuit tolerates the resistor-network impedance and wiper behavior. Firmware can change the division ratio through I2C, which is helpful for range selection, test coverage, and adaptive control. Verify the input voltage range, leakage behavior, and maximum wiper current before using the part directly in a high-impedance divider.
推荐
推荐产品汇总
工程参考数据： MCP4641-104E/ST ——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 | MCP4641T-104E/ST | MCP4641-103E/ST | MCP4641-502E/ST | MCP4661-104E/ST | MCP4542T-503E/MF |
|---|---|---|---|---|---|---|
| Package | 14-TSSOP | 14-TSSOP | 14-TSSOP | 14-TSSOP | 14-TSSOP | 14-TSSOP |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Interface | I2C | I2C | I2C | I2C | I2C | SPI |
关键差异点
- 100 kΩ dual-channel resistance value （对比 MCP4641-103E/ST)
- 7-bit 129-step control resolution （对比 MCP4661-104E/ST)
- I2C interface with non-volatile configuration （对比 MCP4542T-503E/MF)
设计说明
Keep the 14-TSSOP footprint and analog resistor-network traces away from high-current switching nodes. Route the two potentiometer channels separately when their signals are not intentionally related, and maintain a continuous ground reference beneath or near the device. Because exact pin names were not included in the verified data, use the manufacturer pinout rather than relying on package orientation assumptions.
Design the I2C bus with appropriate pull-up resistors and verify the pull-up voltage against the target system’s 3.3 V or 5 V logic level. The MCP4641-104E/ST is specified for 2.7 V to 5.5 V supply, but the complete system must also satisfy I2C rise-time, leakage, and logic thresholds. Check the manufacturer datasheet before selecting resistor values or bus capacitance.
Do not assume that all MCP4641 variants are interchangeable. The verified data distinguishes the 100 kΩ and 129-tap target from MCP4641-103E/ST, MCP4641-502E/ST, and MCP4661-104E/ST. Confirm resistance, step count, interface, memory behavior, package, and temperature requirements before substitution. For MCP4641T-104E/ST, also verify the ordering-code and qualification implications.
合规信息
The supplied verified search data identifies the manufacturer, device family, electrical values, interface, package, and pricing, but does not provide explicit RoHS, REACH, lead-free, halogen-free, or conflict-minerals declarations. Compliance should be confirmed from the current Microchip product documentation or supplier certificates.