XD2903 – Dual Differential Comparator – Xinluda

The Xinluda XD2903 is a dual independent voltage comparator in a DIP-8 package, operating from a single or dual supply of 2V to 36V with open-collector outputs. It is a pin- and function-compatible member of the industry-standard 2903/LM2903 comparator family.

The Xinluda XD2903 is a dual differential voltage comparator that integrates two independent comparators designed to operate from a single power supply over a wide voltage range. It is the DIP-8 through-hole variant of Xinluda’s 293/393/2903 comparator series and is pin- and function-compatible with the industry-standard LM2903 dual comparator, making it a convenient drop-in option for legacy and cost-optimized designs.

Each comparator accepts a differential input whose common-mode range includes ground, and the device can also be operated from dual supplies as long as the difference between the supplies is between 2V and 36V. The open-collector NPN output can be wire-ANDed together and is compatible with TTL, MOS, and CMOS logic. Current drain is low and essentially independent of supply voltage, making the XD2903 well suited to battery-powered and low-power threshold-detection circuits.

Key Features

• Two independent voltage comparators in a single 8-pin package
• Single-supply or dual-supply operation
• Wide supply voltage range: 2V to 36V (maximum rating)
• Low input offset voltage: 2 mV (typical)
• Low input bias current: 25 nA (typical)
• Low supply-current drain, independent of supply voltage: 0.4 mA (typical) per comparator
• Common-mode input voltage range includes ground
• Differential input voltage range equal to maximum-rated supply voltage: 36V
• Low output saturation voltage; open-collector output enables wired-AND operation
• Output compatible with TTL, MOS, and CMOS logic levels
• 2903 device characterized for operation from -40°C to +125°C

Applications

• Analog signal level detection and threshold monitoring
• Window comparators and zero-crossing detectors
• Chemical or gas sensor signal conditioning
• AC induction motor control
• Weigh-scale and instrumentation front-ends
• General industrial and consumer control circuits

Why Source XD2903 from Pacific Component Xchange

The XD2903 is a hard-to-find Xinluda part with little to no authorized-distributor stock in Western markets. Pacific Component Xchange specializes in sourcing scarce and obsolete power-management ICs, comparators, and optocouplers through a vetted global supply network. We back every order with rigorous authenticity and counterfeit-avoidance screening, flexible quantities, and worldwide shipping. If you need the XD2903 or a verified equivalent, request a quote (RFQ) from our sourcing team and we will confirm current availability, lead time, and pricing for your required quantity.