Texas Instruments CD4027BMT

Overview

CD4027BMT from Texas Instruments is a dual J-K flip-flop IC in SOIC-16 package, operating over 3–18 V supply, with synchronous edge-triggered state changes on positive clock transitions, independent asynchronous Set/Reset inputs, and static CMOS retention. It delivers 16 MHz typical toggle frequency at 10 V and supports register, counter, and control logic functions in industrial timing circuits.

For engineers reviewing the CD4027BMT datasheet, CD4027BMT pinout, CD4027BMT application, or CD4027BMT equivalent, this page provides verified pin functions, noise margin values across VDD (1 V @ 5 V, 2 V @ 10 V, 2.5 V @ 15 V), propagation delay (45–90 ns typ. clock-to-Q at 15 V), quiescent current (≤4 μA @ 20 V), and real-world functional modes including no-change, toggle, set, and reset states.

Technical Context

The CD4027BMT implements two independent, fully buffered complementary-symmetry J-K flip-flops with separate J, K, Set, Reset, and Clock inputs per channel, and dual Q/Q̅ outputs. Its static CMOS architecture enables indefinite state retention with clock held high or low, and its self-steering internal logic ensures deterministic state transitions synchronized to the rising edge of the clock.

Each flip-flop supports asynchronous Set and Reset functions active-high and independent of clock timing, while J and K inputs determine next-state behavior (hold, toggle, set, or reset) on the clock's positive transition. Input thresholds are rail-relative (VIH ≥ 3.5 V @ 5 V, VIL ≤ 1.5 V @ 5 V), and noise margins are specified across full temperature range (–55°C to +125°C).

Key Specifications

Pinout & Package

CD4027BMT is housed in a 16-pin SOIC (Small Outline Integrated Circuit) package, 3.9 mm wide, 9.9 mm long, 1.75 mm maximum height, with 1.27 mm pitch, RoHS-compliant NiPdAu lead finish, and JEDEC MO-153 compliant footprint.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual J-K flip-flop applications.

Compared with CD4027BMT, CD4027BM96 offers assured volume supply and optimized SMT handling, while CD4027BNSR provides mechanical compatibility with wider-pitch layouts - both retain identical logic behavior, timing, and voltage specs, making them functionally interchangeable where package fit permits.

Availability

CD4027BMT is available at Aetrix Electronics and suitable for industrial control sequencing, digital counter circuits, power-up state initialization, and legacy system logic upgrades requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for CD4027BMT 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 delivering analog, embedded processing, and logic solutions with emphasis on reliability, longevity, and industrial-grade qualification.

The CD4027BMT belongs to TI's legacy CD4000B CMOS logic family, designed specifically for robust, low-power, wide-voltage-range digital control in harsh environments - from factory automation to aerospace subsystems.

FAQ

What is the maximum clock frequency supported by the CD4027BMT?

The CD4027BMT supports a maximum clock toggle frequency of 16 MHz typical at VDD = 10 V, 24 MHz typical at VDD = 15 V, and 7 MHz typical at VDD = 5 V. These values assume CL = 50 pF and TA = 25°C. The actual usable frequency in a design depends on load capacitance, supply voltage stability, and PCB trace inductance - always verify timing margins using the published propagation delays (tPLH/tPHL) and setup/hold requirements from the CD4027BMT datasheet.

Does the CD4027BMT support asynchronous reset and set functions?

Yes, the CD4027BMT provides fully asynchronous Set and Reset inputs for each of its two J-K flip-flops. Pins 4 (RESET2), 7 (SET2), 9 (SET1), and 12 (RESET1) respond immediately to high-level signals, forcing Q outputs to 1 or 0 regardless of clock state or J/K inputs. This behavior is confirmed in the functional mode table and timing diagrams of the CD4027BMT datasheet, and remains valid across the full operating temperature range (–55°C to +125°C).

What is the supply voltage range for reliable operation of the CD4027BMT?

The CD4027BMT operates reliably from 3 V to 18 V DC, with recommended conditions specifying 3–18 V across the full package temperature range (–55°C to +125°C). Absolute maximum rating is 20 V, but operation above 18 V risks parametric shift or accelerated aging. All AC and DC specifications - including propagation delay, noise margin, and output drive - are guaranteed within the 3–18 V window, making CD4027BMT suitable for multi-rail and battery-backed systems.

How does the CD4027BMT handle noise immunity, and what are its noise margin values?

The CD4027BMT specifies guaranteed noise margins across its operating voltage range: 1 V at VDD = 5 V, 2 V at VDD = 10 V, and 2.5 V at VDD = 15 V - all measured over the full temperature range (–55°C to +125°C). These margins reflect the difference between guaranteed VIH(min) and VIL(max) thresholds, ensuring reliable logic discrimination even with supply ripple or coupled transients. The CD4027BMT achieves this via rail-proportional input thresholds and symmetrical CMOS input structure.

Is the CD4027BMT pin-compatible with other CD4027 variants such as CD4027BE or CD4027BM?

Yes, the CD4027BMT shares identical pinout and electrical functionality with all CD4027B variants including CD4027BE (PDIP-16), CD4027BF (CDIP-16), and CD4027BM (SOIC-16). All variants use the same terminal assignment (e.g., pin 1 = Q2, pin 16 = VDD), identical logic behavior, and overlapping AC/DC specs. The CD4027BMT differs only in packaging (SOIC-16, obsolete status) and minor process-related parameters - no PCB layout change is needed when substituting among these part numbers.