Nexperia USA Inc. HEF4027BT-Q100J

Overview

HEF4027BT-Q100 from Nexperia is a dual positive-edge-triggered JK flip-flop with independent asynchronous set-direct (nSD) and clear-direct (nCD) inputs, complementary outputs (nQ/nQ), Schmitt-trigger clock inputs, and AEC-Q100 Grade 3 qualification for automotive use. It operates across 3.0 V to 15.0 V supply, supports -40 °C to +85 °C ambient range, and delivers propagation delays as low as 22 ns at 15 V with 50 pF load - enabling reliable register and counter functions in engine control units and body electronics.

For engineers reviewing the HEF4027BT-Q100 datasheet, HEF4027BT-Q100 pinout, HEF4027BT-Q100 application, or HEF4027BT-Q100 equivalent, key selection considerations include its dual independent JK sections with asynchronous control, wide VDD tolerance, Schmitt-trigger clock noise immunity, and automotive-grade reliability under transient voltage and thermal stress.

Technical Context

This device implements two fully independent CMOS JK flip-flops, each with separate J, K, CP, SD, CD, Q, and Q terminals. Each section operates synchronously on the rising edge of its dedicated clock input while supporting immediate state override via active-HIGH SD and CD signals - decoupling timing-critical logic from reset/set sequencing.

The Schmitt-trigger action on all clock inputs ensures robust operation with slow-rising or noisy clock edges, and integrated input clamp diodes allow safe interfacing to voltages exceeding VDD when used with current-limiting resistors - critical for mixed-voltage automotive subsystems.

Key Specifications

Pinout & Package

HEF4027BT-Q100 is housed in a plastic SO16 (SOT109-1) package: 16-pin small outline, 3.9 mm body width, 1.27 mm lead pitch, and gull-wing surface-mount terminals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74HC112DR and 74LVC2G80DC, the HEF4027BT-Q100 uniquely combines dual independent JK sections, 3–15 V operation, Schmitt-trigger noise immunity, and AEC-Q100 Grade 3 qualification - making it the sole option for automotive timing-critical latching across mixed-voltage domains.

Availability

HEF4027BT-Q100 is available at Aetrix Electronics and suitable for engine control units, body control modules, instrument clusters, and ADAS camera power sequencers requiring stable component supply across automotive production lifecycles.

Supply support for HEF4027BT-Q100 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

Nexperia is a global semiconductor expert focused on high-volume, high-reliability logic, discrete, and MOSFET solutions - with deep expertise in automotive-qualified components and advanced packaging.

The HEF4027BT-Q100 belongs to Nexperia's automotive logic portfolio, designed specifically to replace legacy 4000-series CMOS devices in safety-critical vehicle subsystems while meeting modern ESD, thermal, and longevity requirements.

FAQ

What is the maximum clock frequency supported by HEF4027BT-Q100?

The device supports up to 30 MHz at 15 V supply with 50 pF load, as specified in the fmax parameter table. At 5 V, maximum frequency drops to 12 MHz due to slower propagation delays. These values assume clean clock edges and proper load capacitance - actual system-level frequency may be lower if PCB trace capacitance exceeds 50 pF or if VIH/VIL margins are compromised.

Can HEF4027BT-Q100 interface directly with 3.3 V microcontrollers?

Yes - its VIH threshold is 1.5 V at 5 V VDD and scales down proportionally, ensuring reliable recognition of 3.3 V logic HIGH signals. However, output VOH will be ~3.3 V (not 5 V), so interfacing to 5 V receivers requires level translation unless those receivers have TTL-compatible inputs.

How does the Schmitt-trigger clock input improve system reliability?

The Schmitt-trigger provides hysteresis (typically 1.5 V at 5 V VDD), allowing the device to ignore noise spikes and slow transitions that would cause false clocking in standard CMOS inputs. This eliminates metastability risks in environments with EMI from ignition systems or motor drivers - common in automotive harness routing.

Is there a recommended decoupling strategy for HEF4027BT-Q100?

Place a 100 nF X7R ceramic capacitor between VDD (Pin 16) and VSS (Pin 8), located ≤2 mm from the package. For systems with high di/dt switching, add a 1 μF tantalum or polymer capacitor nearby. Avoid shared vias between VDD and VSS traces to prevent ground bounce coupling into clock or data lines.