onsemi CD4001BCSJ

Overview

CD4001BCSJ from Fairchild Semiconductor is a quad 2-input NOR gate IC in CMOS B-series logic, featuring buffered outputs, symmetrical source/sink drive (±0.64 mA at 5 V), 3–15 V operating range, and −55°C to +125°C temperature rating. It performs discrete logic-level NOR operations in digital control circuits such as power sequencers and safety interlocks.

For engineers reviewing the CD4001BCSJ datasheet, pinout, applications, or equivalent options, key selection criteria include supply voltage flexibility (3–15 V), low quiescent current (≤0.25 µA at 5 V), propagation delay (110–120 ns typical at 5 V), input protection diodes, and SOP-14 package compatibility with surface-mount industrial PCBs.

Technical Context

The CD4001BCSJ implements four independent 2-input NOR gates using complementary MOS (CMOS) N- and P-channel enhancement-mode transistors. Each gate has fully buffered output stages that deliver high-voltage gain and improved noise margin over unbuffered variants.

It conforms to standard B-series output drive specifications, supports fan-out of 2 into 74L or 1 into 74LS TTL loads, and includes input protection diodes to VDD and VSS for ESD robustness up to ±2 kV per MIL-STD-883 Method 3015.

Key Specifications

Pinout & Package

CD4001BCSJ is housed in a 14-lead Small Outline Package (SOP), EIAJ TYPE II, 5.3 mm body width, with gull-wing leads and JEDEC-standard pin spacing (1.27 mm pitch). The package is RoHS-compliant and rated for reflow per J-STD-020.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NOR gate logic applications.

Compared with CD4001BE and MC14001BDR2G, the CD4001BCSJ offers optimal balance of surface-mount manufacturability, wide-voltage operation, and industrial temperature support - making it preferred for space-constrained, multi-rail embedded controllers where SOP-14 footprint and 5.3 mm width are critical.

Availability

CD4001BCSJ is available at Aetrix Electronics and suitable for power sequencing control, industrial safety interlocks, legacy system logic replacement, and low-power sensor interface applications requiring stable component supply across extended temperature and voltage ranges.

Supply support for CD4001BCSJ 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 U.S.-based analog and power IC designer acquired by ON Semiconductor in 2016; its legacy logic portfolio remains widely deployed in industrial and aerospace systems.

The CD4001BCSJ belongs to the CD4000B series - a family of radiation-tolerant, wide-supply CMOS logic devices engineered for high-reliability applications where long-term parametric stability and extreme temperature operation are mandatory.

FAQ

What logic function does the CD4001BCSJ implement?

The CD4001BCSJ implements four independent 2-input NOR gates. Each gate outputs a logical HIGH only when both inputs are LOW; otherwise, the output is LOW. This behavior is defined by the Boolean expression Y = NOT(A OR B). All gates operate identically and share no internal coupling - the CD4001BCSJ contains no cross-gate dependencies or shared resources.

Can CD4001BCSJ operate at 3.3 V supply?

Yes, CD4001BCSJ is fully specified down to 3 VDC supply voltage. At 3.3 V, it delivers guaranteed VOL ≤ 0.1 V and VOH ≥ 3.2 V under light load, with propagation delay increasing to ~300 ns typical. Input thresholds scale proportionally (VIL ≈ 1.0 V, VIH ≈ 2.3 V), ensuring interoperability with 3.3 V microcontrollers and FPGAs.

Is CD4001BCSJ pin-compatible with CD4011BC?

No, CD4001BCSJ is not pin-compatible with CD4011BC. While both are 14-pin SOP devices with identical physical footprint and power pin locations (VDD on pin 14, VSS on pin 7), their logic functions differ: CD4001BCSJ contains NOR gates, whereas CD4011BC contains NAND gates. Their input/output pin assignments are distinct and non-interchangeable without circuit redesign.

What is the maximum capacitive load the CD4001BCSJ can drive?

The CD4001BCSJ is characterized with CL = 50 pF in AC testing, and its transition time (tTHL/tTLH) remains within spec (≤200 ns at 5 V) up to 100 pF. Beyond that, propagation delay increases linearly and output rise/fall times degrade. For loads >100 pF, external buffer stages or reduced supply voltage (to lower output impedance) are recommended to maintain timing integrity.

Does CD4001BCSJ require external pull-up or pull-down resistors on unused inputs?

Yes, all unused inputs on CD4001BCSJ must be terminated - either to VDD or VSS - to prevent floating nodes that cause increased supply current, erratic switching, or localized heating. CMOS inputs have high impedance; leaving them open risks metastability and violates the absolute maximum rating for input voltage (−0.5 V to VDD + 0.5 V). A 10 kΩ pull-up or pull-down resistor is sufficient for most applications.