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Texas Instruments 4027BDC — Logic ICs

Texas Instruments 4027BDC J-K Flip-Flop, Bulk, Active

MPN4027BDC
End of Life

Texas Instruments 4027BDC J-K flip-flop, Bulk package, active lifecycle, RoHS non-compliant, logic IC.

$2.43Ref. price · indicative, final on quote
Texas Instruments 4027BDC datasheet (PDF)
RoHSRoHS non-compliant
Series*
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

4027BDC specifications
ParameterValue
Series*
PackageBulk

Product details

The 4027BDC is a J-K flip-flop from Texas Instruments, supplied in a Bulk package — typically a DIP or through-hole format that mates with a standard 0.100-inch pitch socket or wave-solder footprint. The Bulk tube quantity is the unit count per tube; no reel or tape carrier, so pick-and-place lines need a tube feeder or manual insertion. It is RoHS non-compliant, meaning the lead finish is tin-lead (SnPb) rather than pure tin — a legacy BOM requirement for assemblies that still specify a leaded solder process or where tin-whisker risk is unacceptable.

Sourcing and quoting — what to expect

No stock-holding claim; the supply posture is per-request sourcing.

Frequently asked questions

What is the closest functional second-source for 4027BDC?

The SN74AS74ADBR is a peer J-K flip-flop from the same manufacturer, but it belongs to the 74AS logic family (advanced Schottky) rather than the CD4000 series of the 4027BDC. The pinout and function are the same, but supply voltage range, switching speed, and input thresholds differ — confirm the BOM's logic levels and timing budget before substituting.

Why is 4027BDC RoHS non-compliant?

The 4027BDC uses a tin-lead (SnPb) lead finish, which is not RoHS-compliant. This is typical of legacy through-hole logic ICs that were designed before the RoHS directive. The part is suitable for assemblies that still specify a leaded solder process or where tin-whisker mitigation is required.