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2 parts compared · 14 differing specs across 14 total parameters.

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Specification differences for CD4011B, HEF4011B
Parameter
Supply voltage-3V to 15V; quiescent current nanoamp class; inputs protected to the rails.
Memory & Peripherals-The whole 4000B logic family is standardized: 4011, 4001, 4023, 4069 and relatives interlock by pin number across every manufacturer.
CaseDIP-14 / SOIC-14 / TSSOP-14DIP-14 / SOIC-14
Compatibility Level-100% Drop-in (Zero Code Change)
Component CategoryCMOS Logic Gates (4000B Series)-
Core & Architecture-The Nexperia 4000B quad NAND: 3V to 15V supply, symmetric output drive, same function table and same folded gate arrangement (gate outputs on pins 3, 4, 10 and 11).
Firmware Notes-The correct substitution when a 4000B board needs a logic gate. No circuit change: same thresholds, same drive, same speed class for the application.
Hardware Notes-DIP-14 / SOIC-14 with the standard 4000B pin assignment (VDD = 14, VSS = 7).
Lead Time Advantage-Shenzhen Spot Stock (24-48h Dispatch)
Market RealityThe CD4011B is the quad 2-input NAND of the 4000B CMOS generation - the logic of old industrial timers, alarm panels, appliance controls and instrument interlocks that are still in service and still repaired. Inside the 4000B family the pinout is a JEDEC standard, so every manufacturer copy swaps pin-for-pin. Outside the family it is a trap zone: the 74HC00 quad NAND looks like the same function in the same 14-pin body, and it is wired differently, runs on a narrower supply, and drives ten times the current.-
Reference Part-CD4011B
Role In CircuitOriginal Reference Part-
Sourcing Advantage-Continuous multi-fab production; DIP parts still widely available for bench repair.
Sourcing StatusActive Shenzhen Spot Sourcing (24–48h)-

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