onsemi MC14001UBDR2G

Overview

MC14001UBDR2G from onsemi is a quad 2-input NOR gate CMOS logic IC designed for low-power, high-noise-immunity digital control and signal conditioning. It operates across 3.0–18 VDC supply, delivers ±10 mA output drive per pin, supports −55°C to +125°C ambient operation, and features double diode input protection. It is used in industrial timing circuits, reset logic generators, and discrete combinational logic blocks where rail-to-rail voltage compatibility and latch-up immunity are required.

For engineers reviewing the MC14001UBDR2G datasheet, pinout, applications, or equivalent options, key selection criteria include its 14-pin SOIC package, guaranteed 125°C operation, VDD/VSS-referenced input thresholds, propagation delay down to 40 ns at 15 V, and direct CD4000-series UB-suffix compatibility.

Technical Context

The MC14001UBDR2G implements four independent 2-input NOR gates using complementary MOS (CMOS) P- and N-channel enhancement-mode transistors on a single monolithic die. Its logic function is strictly inverting and non-buffered, with inputs requiring explicit termination to VSS or VDD - unused NOR inputs must be tied to VSS to prevent floating states.

It supports dynamic operation up to 3 MHz at 15 V with CL = 50 pF, exhibits rail-to-rail output swing (VOH ≥ VDD − 0.05 V, VOL ≤ 0.05 V), and maintains stable quiescent current (IDD ≤ 30 µA at 15 V, 125°C). Input capacitance is 7.5 pF max, and total supply current scales linearly with frequency and load capacitance per published formulas.

Key Specifications

Pinout & Package

MC14001UBDR2G is housed in a 14-pin SOIC (Small Outline Integrated Circuit) package, case 751A, Pb-free, with standard 1.27 mm pitch and 8.55–8.75 mm body width. Pin 1 is index-marked; pin 7 is VSS (ground); pin 14 is VDD (supply).

Key Features

Applications

Equivalent & Alternatives

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

Compared with CD4001BM96 and 74HC02DR2G, MC14001UBDR2G uniquely combines automotive-grade temperature rating, integrated input protection, and 3–18 V flexibility - making it the sole choice for ruggedized, multi-rail, or long-lifecycle industrial logic replacement.

Availability

MC14001UBDR2G is available at Aetrix Electronics and suitable for industrial control sequencing, automotive body electronics, and legacy system logic retrofit requiring stable component supply, long-term lifecycle support, and guaranteed Pb-free compliance.

Supply support for MC14001UBDR2G 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, logic, and sensing solutions for automotive, industrial, and cloud infrastructure markets.

The MC14001UBDR2G belongs to onsemi's legacy CMOS logic portfolio, engineered for reliability in harsh environments and backward compatibility with industry-standard CD4000-series designs.

FAQ

What is the maximum operating temperature for MC14001UBDR2G?

The MC14001UBDR2G is rated for continuous operation from −55°C to +125°C ambient temperature. This specification is validated per onsemi's datasheet maximum ratings table and applies across the full 3.0–18 VDC supply range. The device maintains specified VOH, VOL, and propagation delay performance within this range, making MC14001UBDR2G suitable for under-hood automotive and industrial enclosure applications where thermal stress is a primary design constraint.

Does MC14001UBDR2G require external pull-up or pull-down resistors on unused inputs?

Yes - all unused inputs of the MC14001UBDR2G must be tied directly to VSS (pin 7) because it is a NOR gate. Floating inputs can cause excessive supply current, logic instability, or localized heating due to partial conduction in the CMOS structure. The datasheet explicitly states: "Unused inputs of OR, NOR gates must be connected to VSS." Leaving them unconnected violates absolute maximum ratings and voids guaranteed performance for MC14001UBDR2G.

Is MC14001UBDR2G pin-compatible with CD4001UB devices?

Yes, MC14001UBDR2G is a pin-for-pin replacement for CD4001UB series devices, including CD4001BE and CD4001BCN. The pin assignments, logic function, supply range, and AC/DC electrical characteristics align per onsemi's datasheet claim: "Pin-for-Pin Replacements for Corresponding CD4000 Series UB Suffix Devices." No PCB layout changes are needed when upgrading from CD4001UB to MC14001UBDR2G.

What is the typical propagation delay of MC14001UBDR2G at 5 V supply?

At VDD = 5.0 V, CL = 50 pF, and TA = 25°C, the typical propagation delay (tPLH/tPHL) for MC14001UBDR2G is 180 ns, with a maximum of 360 ns. This value is derived from the switching characteristics table in the official datasheet. Note that "Typ" values are indicative only and not guaranteed; design-critical timing must use the max value (360 ns) for worst-case analysis of MC14001UBDR2G.

Can MC14001UBDR2G drive a standard 74LS TTL input directly?

Yes - MC14001UBDR2G is specified to drive two low-power TTL (LPTTL) loads or one low-power Schottky TTL (LPS-TTL) load across the full temperature range. At VDD = 5 V, its output sink current (IOL) is ≥0.64 mA and source current (IOH) is ≥−0.75 mA, exceeding the 74LS input requirements (IIH = 20 µA, IIL = −0.4 mA). Therefore, MC14001UBDR2G can interface directly with 74LS-series ICs without buffer stages.