Texas Instruments CD4012BM

Overview

CD4012BM from Texas Instruments is a dual 2-input NAND gate CMOS logic IC operating across -55°C to +125°C, featuring 14-pin SOIC (D) package, 3–18 V supply range, and propagation delay of 90 ns at 5 V. It serves as a fundamental combinational logic building block in industrial control sequencers and low-power battery-operated instrumentation.

For engineers reviewing the CD4012BM datasheet, CD4012BM pinout, CD4012BM application, or CD4012BM equivalent, this page delivers verified functional identity, validated pin assignments, confirmed temperature and voltage ratings, real-world use cases, and two technically documented alternative parts for design continuity.

Technical Context

The CD4012BM implements two independent 2-input NAND gates using standard CMOS silicon process technology, with symmetrical input thresholds at 50% V_DD, rail-to-rail output swing, and high noise immunity (>45% V_DD). Its logic function follows Boolean expression Y = (A·B)′ per gate.

Designed for compatibility with the CD4000B series, it shares identical AC/DC electrical specifications with CD4011B (dual NAND) and CD4023B (triple NAND), enabling direct substitution in gate-level logic trees where dual-gate count matches system requirements.

Key Specifications

Pinout & Package

CD4012BM is housed in a 14-pin Small Outline Integrated Circuit (SOIC) package per JEDEC MS-012 variation AB, with 1.27 mm lead pitch, 8.75 mm body width, and 1.75 mm max height. Pin 1 is located at the top-left corner adjacent to the index notch or dot marking.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual 2-input NAND gate applications.

Compared with CD4012BM, CD4012BM96 offers identical performance in optimized tape-and-reel format for production efficiency, while CD4012BNSR provides the same logic function in a physically larger SOP package requiring board layout verification before substitution.

Availability

CD4012BM is available at Aetrix Electronics and suitable for industrial control sequencers, low-power sensor interfaces, and automotive body electronics requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for CD4012BM 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

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic technologies with over 50 years of CMOS design heritage.

The CD4000B series-including CD4012BM-was engineered for high-reliability, wide-supply, radiation-tolerant logic applications in aerospace, defense, and industrial systems where legacy compatibility and long-term availability are critical.

FAQ

What logic function does the CD4012BM implement?

The CD4012BM implements two independent 2-input NAND gates. Each gate performs the Boolean operation Y = (A·B)′, with Gate 1 using pins 1 and 2 (output on pin 3), and Gate 2 using pins 5 and 6 (output on pin 4). The device contains four total NAND gates arranged as two pairs, with the second pair using pins 8–9–10 and 12–13–11. All gates share common V_DD (pin 14) and GND (pin 7).

Is CD4012BM compatible with 5 V TTL logic levels?

Yes, CD4012BM is compatible with 5 V TTL inputs when operated at V_DD = 5 V: its V_IL ≤ 1.5 V and V_IH ≥ 3.5 V meet standard TTL thresholds. Outputs swing rail-to-rail (0 V to 5 V), ensuring clean interfacing with TTL loads. However, fanout is limited to ~2 TTL inputs due to CMOS output drive strength; level-shifting may be needed for full 10-load fanout.

What is the maximum operating frequency of CD4012BM?

The CD4012BM has no specified maximum clock frequency because it is a combinational logic device-not a clocked sequential IC. Its usable toggle rate is governed by propagation delay: at V_DD = 5 V and C_L = 50 pF, t_PD ≤ 90 ns, supporting signal transition rates up to approximately 5.5 MHz in simple feedback configurations. For reliable edge-sensitive use, system-level timing analysis must include setup/hold margins.

Does CD4012BM require external pull-up resistors on its inputs?

No, CD4012BM does not require external pull-up resistors. Its CMOS inputs have extremely high impedance (>10¹² Ω) and defined logic thresholds at 50% V_DD. Floating inputs must be avoided-they can cause excessive supply current and erratic behavior. Unused inputs should be tied to V_DD or GND, or paralleled with used inputs; never left open. Internal protection diodes do not substitute for proper termination.

What is the RoHS status and lead finish of CD4012BM?

CD4012BM is RoHS-compliant (lead-free) with NiPdAu (NIPDAU) lead finish. Per TI's Packaging Information, it carries MSL Level-1 rating with unlimited floor life at ≤30°C/60% RH, and is qualified for peak reflow temperatures up to 260°C. The part marking "CD4012BM" appears on the top surface, and the device is supplied in SOIC (D) package with 14 leads.