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Product Detailed Parameters
- Description：IC DGTL POT 50KOHM 128TAP SC70-5
- Series：-
- Mfr：Microchip Technology
- Package：Tape & Reel (TR),Cut Tape (CT)
- Taper：Linear
- Configuration：Rheostat
- Number of Circuits：1
- Number of Taps：128
- Resistance (Ohms)：50k
- Interface：I2C
- Memory Type：Volatile
- Voltage - Supply：1.8V ~ 5.5V
- Features：-
- Tolerance：±20%
- Temperature Coefficient (Typ)：150ppm/°C
- Mounting Type：Surface Mount
- Supplier Device Package：SC-70-5
- Package / Case：5-TSSOP, SC-70-5, SOT-353
- Operating Temperature：-40°C ~ 125°C
- Resistance - Wiper (Ohms) (Typ)：155
- Grade：-
- Qualification：-
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Overview
The MCP4019T-503E/LT is a single-channel, 7-bit volatile digital potentiometer manufactured by Microchip Technology. It features an I2C serial interface and operates within a supply voltage range of 1.8V to 5.5V. The device provides 128 discrete wiper positions with a nominal resistance (RAB) of 50 kΩ. It utilizes a rheostat configuration housed in a compact SC70-5 package. Key electrical characteristics include a typical wiper resistance of 100 Ω, a bandwidth of 260 kHz at the specified resistance, and low power consumption with a static current of 2.5 µA.
Feature Summary
- 7-bit resolution providing 128 distinct wiper steps for precise resistance control
- I2C serial interface supporting standard mode (100 kHz) and fast mode (400 kHz)
- Wide operating voltage range from 1.8V to 5.5V with brown-out reset protection
- Low-power operation with typical static current of 2.5 µA
Applications
- Volume control in audio equipment
- Programmable gain amplifiers
- Voltage reference adjustment
- Sensor biasing and calibration
Procurement Notes
Verify the specific suffix 'LT' corresponds to the SC70-5 package and tape-and-reel shipping format as defined in the official datasheet. Confirm that the '503' designation accurately reflects the 50 kΩ resistance value required for the design. Ensure the volatile memory type aligns with system requirements regarding power-loss state retention.
Selection Notes
Select this component when a rheostat configuration is preferred over a potentiometer setup. The 50 kΩ resistance value suits applications requiring moderate impedance levels. Consider the SC70-5 footprint constraints and the need for I2C bus compatibility. Verify that the 1.8V minimum supply voltage meets the lowest system rail availability.
Part Context
This part belongs to the MCP4017/18/19 family of 7-bit digital potentiometers. While the MCP4017 and MCP4018 share similar electrical specifications and interfaces, they differ in pinout and internal configuration. The MCP4019 specifically offers a rheostat arrangement in a five-pin SC70 package, distinguishing it from the six-pin variants.
Replacement Considerations
MCP4017T-503E/LT: Requires pinout adaptation due to different package pin count and configuration.
FAQ
What is the default wiper position upon power-up?
The device initializes to a mid-scale setting (3Fh hex) via Power-On Reset or Brown-Out Reset.
Does the MCP4019 retain its setting after power loss?
No, the device uses volatile RAM memory, meaning the wiper position resets to mid-scale upon power cycling.
What is the maximum clock frequency supported?
The device supports I2C Fast Mode with a maximum clock frequency of 400 kHz.
