onsemi CD4011BCSJX

Overview

CD4011BCSJX from Fairchild Semiconductor is a quad 2-input NAND gate IC in CMOS B-series technology, 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 logic building block in power-supply sequencers, reset generators, and digital control interfaces.

For engineers reviewing the CD4011BCSJX datasheet, pinout, applications, or equivalent options, key selection considerations include its 14-lead SOIC package (M14D), 35 ns propagation delay at 15 V, ±1 µA max input leakage, 5 pF typical input capacitance, and compatibility with legacy 4000B-series designs requiring low static power and wide supply tolerance.

Technical Context

The CD4011BCSJX implements four independent 2-input NAND gates using complementary MOS transistors with N- and P-channel enhancement-mode devices. Each gate has fully buffered output stages that deliver high-voltage gain and sharpened transfer characteristics.

Input protection diodes clamp to VDD and VSS, enabling robust ESD immunity. The device conforms to standard B-series output drive specifications and supports fan-out of 1 into 74LS or 2 into 74L TTL loads at 5 V.

Key Specifications

Pinout & Package

CD4011BCSJX is housed in a 14-lead Small Outline Package (SOP), EIAJ TYPE II, 5.3 mm wide (Package Number M14D), with gull-wing leads and standard JEDEC footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CD4011BE and MC14011BDR2G, the CD4011BCSJX offers optimized surface-mount reliability and thermal dissipation in SOP packaging, while retaining full functional and timing equivalence - making it ideal for new production runs targeting cost-effective, space-constrained industrial PCBs.

Availability

CD4011BCSJX is available at Aetrix Electronics and suitable for power sequencing control, microcontroller reset logic, and industrial sensor interface applications requiring stable component supply across extended temperature and voltage ranges.

Supply support for CD4011BCSJX 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 analog and discrete semiconductor manufacturer, acquired by ON Semiconductor in 2016; its legacy 4000B-series logic remains widely supported and qualified.

The CD4011BCSJX belongs to Fairchild's 4000B-series CMOS logic family, designed for robust, low-power digital control in harsh environments where wide supply tolerance and high noise immunity are essential.

FAQ

What logic function does the CD4011BCSJX implement?

The CD4011BCSJX implements four independent 2-input NAND gates. Each gate performs the Boolean function Y = NOT(A AND B), with true CMOS inputs and fully buffered outputs. Its logic behavior is identical to the industry-standard 4011B function, verified across the full −55°C to +125°C operating range and 3–15 V supply.

Is the CD4011BCSJX pin-compatible with other 4011 variants?

Yes, the CD4011BCSJX uses the standard 14-pin dual-in-line pinout, matching CD4011BE (PDIP), CD4011BCM (SOIC), and MC14011BDR2G. Pin 1–7 and 8–14 assignments are identical across all variants, including VDD (pin 14), VSS (pin 7), and gate I/O mapping - enabling direct substitution in existing layouts.

What is the maximum propagation delay of the CD4011BCSJX at 5 V?

At VDD = 5 V and TA = 25°C, the CD4011BCSJX exhibits a maximum propagation delay of 250 ns for both tPLH (LOW-to-HIGH) and tPHL (HIGH-to-LOW), as specified in the AC Electrical Characteristics table. Typical values are 85 ns and 120 ns respectively, confirming suitability for sub-10 MHz combinatorial logic paths.

Does the CD4011BCSJX require external pull-up or pull-down resistors?

No, the CD4011BCSJX does not require external pull-up or pull-down resistors on its inputs. Its CMOS inputs have extremely low leakage (≤±0.1 µA at 15 V), and internal protection diodes ensure stable logic thresholds. Pull-ups are only needed if interfacing with open-drain/open-collector sources outside the device.

Can the CD4011BCSJX operate reliably at 3 V supply?

Yes, the CD4011BCSJX is fully specified down to 3 V DC supply, with guaranteed VOH ≥ 2.5 V and VOL ≤ 0.5 V at 3 V and 25°C. Propagation delay increases to 500 ns max, but functionality remains intact - making it viable for low-power battery-operated systems where higher speed is not critical.