onsemi CD4011BCSJ

Overview

CD4011BCSJ from Fairchild Semiconductor is a quad 2-input NAND gate IC in CMOS B-series logic, featuring buffered outputs, symmetrical source/sink drive (±0.64 mA at 5 V), 5–15 V operating range, and −55°C to +125°C temperature rating. It serves as a fundamental digital logic building block in power-supply sequencers, industrial control timers, and battery-powered instrumentation.

For engineers reviewing the CD4011BCSJ datasheet, pinout, applications, or equivalent options, key selection factors include its rail-to-rail output swing, low input leakage (<1 µA at 15 V), propagation delay (35–250 ns depending on VDD), and EIAJ TYPE II SOP-14 package compatibility with automated SMT assembly.

Technical Context

The CD4011BCSJ implements four independent 2-input NAND gates using complementary MOS transistors with N- and P-channel enhancement-mode devices. Each gate has diode-clamped inputs for ESD protection to VDD and VSS, and buffered outputs that deliver high-voltage gain and improved noise margin over unbuffered variants.

It operates across a wide supply range (3–15 V DC) with quiescent current as low as 0.004 µA at 5 V and 25°C, and supports AC performance up to 3 MHz typical at 10 V with 50 pF load - enabled by its 35 ns max propagation delay at 15 V and 40 ns max transition time under same conditions.

Key Specifications

Pinout & Package

CD4011BCSJ is housed in a 14-lead Small Outline Package (SOP), EIAJ TYPE II, 5.3 mm wide, with standard DIP-compatible pinout and gull-wing leads for reflow soldering.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NAND gate logic applications.

Compared with CD4011BCSJ, CD4011BE offers mechanical simplicity but lacks SMT process compatibility, while MC14011BDR2G delivers identical functionality with enhanced manufacturability and long-term availability - making it the preferred upgrade path for new designs.

Availability

CD4011BCSJ is available at Aetrix Electronics and suitable for industrial timer logic, battery-powered instrumentation, and automotive body control applications requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for CD4011BCSJ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Fairchild Semiconductor was a leading designer of analog and discrete semiconductors, acquired by ON Semiconductor in 2016; its legacy logic families remain widely deployed in industrial and automotive systems.

The CD4011BCSJ belongs to the CD4000B series of CMOS logic ICs, developed for robust, wide-supply-voltage digital interfacing in harsh environments where TTL alternatives consumed excessive power or lacked temperature resilience.

FAQ

What logic function does the CD4011BCSJ implement?

The CD4011BCSJ implements four independent 2-input NAND gates. Each gate performs the Boolean function Y = NOT(A AND B), with buffered outputs ensuring sharp transitions and high noise immunity. This makes CD4011BCSJ ideal for combinational logic, signal inversion, and basic sequential circuit building blocks in both new designs and legacy system repairs.

What is the maximum supply voltage for CD4011BCSJ?

The CD4011BCSJ supports an absolute maximum VDD of +18 VDC, but its recommended operating range is 3 VDC to 15 VDC. Operating at 15 V ensures full output drive capability (±4.2 mA) and minimal propagation delay (35 ns), while staying within safe margins for long-term reliability. Exceeding 15 V risks accelerated aging and is not guaranteed by specification.

Does CD4011BCSJ require external pull-up resistors on its inputs?

No, CD4011BCSJ does not require external pull-up resistors on its inputs. Its CMOS inputs have extremely high impedance and internal diode-based ESD protection to VDD and VSS, allowing direct connection to switches, open-collector drivers, or microcontroller pins. Pull-ups are only needed if a defined logic state is required during power-up or floating conditions - not due to inherent input weakness.

Is CD4011BCSJ compatible with 3.3 V microcontrollers?

Yes, CD4011BCSJ is fully compatible with 3.3 V microcontrollers when operated at VDD = 3.3 V. At this voltage, it meets VIH ≥ 2.0 V and VIL ≤ 1.0 V thresholds, ensuring reliable recognition of MCU output levels. Its output VOH ≈ 3.25 V and VOL ≈ 0.05 V at 3.3 V provide adequate noise margin for bidirectional interfacing without level translation.

What package type is used for CD4011BCSJ?

CD4011BCSJ uses a 14-lead Small Outline Package (SOP), EIAJ TYPE II, 5.3 mm wide (package number M14D). It features gull-wing leads with 1.27 mm pitch, compatible with standard surface-mount reflow processes. This package offers better thermal performance than PDIP and smaller footprint than SOIC, making CD4011BCSJ suitable for space-constrained industrial PCBs.