MCP4561T-503E/MS

MCP4561T-503E/MS is Microchip’s single‑channel digital potentiometer (DigPot). Key points:
- End-to-end resistance: 50 kΩ (503).
- Wiper: programmable with 128 positions (0–127) for precise trimming, gain, or offset adjustments.
- Interface: controlled via a serial bus (I2C/2‑wire compatible interface) to set the wiper position.
- Temperature package: extended range (-40°C to +125°C).
- Packaging: MS suffix indicates MSOP/8-pin package; “/MS” denotes tape‑and‑reel option; “T” often points to the packaging option.
- Power: typically operates around 2.7–5.5 V.
- Applications: automated calibration, sensor interfacing, gain/level adjustments, and other analog-trim tasks where a programmable resistance is useful.
Note: Always consult the actual datasheet for exact interface details, timing, and memory behavior (volatile vs. nonvolatile) for your specific revision.

The MCP4561T-503E/MS is a 1‑channel, 50 kΩ end-to-end, SPI‑controlled digital potentiometer with a 128-step (7‑bit) wiper.
Equivalents from other vendors are any 50 kΩ single‑channel SPI digital pot with a 128-step wiper. Examples: Analog Devices, TI, ST, and ON Semiconductor offer similar 50 kΩ SPI digital pots. When substituting, verify interface timing, voltage range, package, and volatile vs non‑volatile behavior.

Here are the key features of the MCP4561T-503E/MS:
- Single-channel digital potentiometer with 50 kΩ end-to-end resistance (code 503).
- 8-bit resolution (256 wiper positions).
- I2C-compatible serial interface for control.
- Supply voltage range: 2.7 V to 5.5 V (low-voltage operation).
- Extended temperature grade: -40°C to +125°C.
- Low power consumption (suitable for battery-powered apps).
- 8-pin MSOP package (MS) with Tape & Reel packaging (MS variants).
- On-chip wiper register with fast update to pTOP of the pot.
Note: The suffix MS indicates packaging; the -503 specifies 50 kΩ end-to-end resistance.

- Pin count: 8 pins (8-pin package)
- Function: Single-channel digital potentiometer with 50 kΩ end-to-end resistance. External terminals: A, B, W; SPI-compatible control via CS, SCK, SI (data in). Power: VDD and VSS. Wiper position is set by SPI in 0–127 steps (7-bit resolution).

- Manufacturer: Microchip Technology Inc.
- What kind of company: An American multinational semiconductor company that designs, develops, and manufactures microcontrollers, analog and memory devices, and other embedded control solutions (HQ: Chandler, Arizona).

Applications:
- Replacing mechanical potentiometers in consumer electronics for volume, brightness, and user controls
- Analog signal conditioning: adjustable gain/offset in op-amp circuits and programmable feedback
- Sensor calibration and trim: offset/span adjustments for temperature, pressure, and other sensors
- Reference/divider networks: programmable resistor dividers for ADC/DAC references and attenuation
- Filtering and timing: tuning RC networks and filter characteristics in analog front-ends
- Prototyping and lab tests: repeatable potentiometer in test benches
MCP4561T-503E/MS specifics: 50 kΩ end-to-end resistance and 128-step (7-bit) wiper.

MSOP-8 package (Micro Small Outline Package), 8-pin. The /MS suffix indicates MSOP packaging; -503E denotes 50 kΩ end-to-end resistance with extended temperature range.