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Texas Instruments 7403DC — Logic ICs

7403DC TTL NAND Gate, Active, RoHS Non-Compliant

MPN7403DC
End of Life

7403DC, TTL NAND Gate, Series *, Package Bulk, lifecycle_stage current, RoHS non-compliant.

$0.18Ref. price · indicative, final on quote
Texas Instruments 7403DC datasheet (PDF)
RoHSRoHS non-compliant
Series*
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

7403DC specifications
ParameterValue
Series*
PackageBulk

Product details

The 7403DC is a TTL NAND gate with open-collector outputs.

The RoHS non-compliant marking is the key constraint: this part contains lead (Pb) in the solder finish or die attach, which means it cannot be used in new EU RoHS-exempted designs without a specific exemption (e.g., for high-reliability or aerospace applications that still permit leaded solder). For BOM planning, factor in the need for a RoHS compliance statement or an explicit exemption waiver if your end-market requires it.

Frequently asked questions

Is 7403DC open collector?

This allows wired-AND connections and driving loads with an external pull-up resistor.

What is the difference between 7403 and 7400?

Both are quad 2-input NAND gates, but the 7400 has standard totem-pole outputs (push-pull) while the 7403 has open-collector outputs. The open-collector version lets you tie multiple outputs together for wired-AND logic and drive loads at higher voltages than the standard 5 V rail.