5 Bit Programmable, Pulse-Width Modulator: 1kHz, 5kHz, 10kHz, and 25kHz

2-Wire Interface Gives Processor Control of PWM Functions

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The DS1050 is a programmable, 5-bit, pulse-width modulator featuring a 2-wire addressable controlled interface. The DS1050 operates from power supplies ranging from 2.7V up to 5.5V. The PWM output provides a signal that swings from 0V to VCC. The DS1050 requires a typical operating current of 50µA and a programmable shutdown supply current of 1µA. Four standard PWM output frequencies are offered and include 1kHz, 5kHz, 10kHz, and 25kHz. The 2-wire addressable interface allows operation of multiple devices on a single 2-wire bus and provides compatibility with other Dallas Semiconductor 2-wire devices such as real-time clocks (RTCs), digital thermometers, and digital potentiometers. The device is ideal for low-cost LCD contrast and/or brightness control, power supply voltage adjustment, and battery charging or current adjustment. The DS1050 is offered in standard integrated circuit packaging including the 8-pin (150-mil) SOIC and space-saving 8-pin (118-mil) µSOP.
DS1050: Block Diagram DS1050: Block Diagram Enlarge+

Key Features

  • Single 5-bit, programmable, pulse-width modulator (PWM)
  • Adjustable Duty Cycle: 0% to 100%
  • 2.7V to 5.5V Operation
  • Standard Frequency Values: 1kHz, 5kHz, 10kHz, and 25kHz
  • 2-Wire Addressable Interface
  • Packages: 8-Pin (150-mil) SOIC and 8-Pin (118-mil) µSOP
  • Operating Temperature: -40°C to +85°C


  • Automated Test Equipment (ATE)
  • Battery Chargers
  • Building Energy Management (HVAC)
  • LCD Displays and Panels
  • Motor and Motion Control
  • Power Supplies
  • Sensors - Temperature

See parametric specs for Programmable Pulse Width Modulators (1)

Part NumberfOUT
Frequency VariationProgram RangeInterfaceVSUPPLY
See Notes
DS1050 25±20%0 to 100% Duty Cycle2-Wire2.7 to 5.5
SOIC (N)/8
$1.37 @1k

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
Request Reliability Report for: DS1050X-001 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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