Nexperia USA Inc. HEF4015BT,652

Overview

HEF4015BT,652 from Nexperia is a dual 4-bit static shift register (serial-to-parallel converter) with two independent edge-triggered shift registers, each featuring serial input (nD), clock input (nCP), four buffered parallel outputs (Q0–Q3), and asynchronous master reset (nMR). 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 32 ns at 15 V with 50 pF load - used in industrial control logic, LED matrix drivers, and legacy microcontroller I/O expansion.

For engineers reviewing the HEF4015BT,652 datasheet, HEF4015BT,652 pinout, HEF4015BT,652 application, or HEF4015BT,652 equivalent, key selection criteria include its dual-register architecture, LOW-to-HIGH clock edge triggering, asynchronous active-HIGH reset behavior, wide-voltage CMOS compatibility, and SO16 package footprint for through-hole or surface-mount PCB integration.

Technical Context

The HEF4015BT,652 implements two identical 4-bit static shift registers using CMOS flip-flop stages, each synchronized on the LOW-to-HIGH transition of its dedicated clock input (1CP/2CP). Data shifts rightward: nD → Q0 → Q1 → Q2 → Q3, with all outputs fully buffered for fan-out capability.

Each register includes an overriding asynchronous master reset (1MR/2MR) that forces Q0–Q3 LOW regardless of clock or data state. Input clamp diodes enable safe interfacing to voltages exceeding VDD when used with current-limiting resistors - a design feature critical for mixed-voltage system interfacing.

Key Specifications

Pinout & Package

HEF4015BT,652 is housed in a plastic small outline package (SO16), SOT109-1, with 16 leads and 3.9 mm body width - compatible with standard SOIC-16 footprints and reflow soldering profiles.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual 4-bit shift register applications.

Compared with CD4015BE and 74HC164, the HEF4015BT,652 uniquely offers dual independent 4-bit registers with per-register asynchronous reset in a standardized SO16 package - enabling fault-isolated data handling and mixed-voltage interoperability not available in either alternative.

Availability

HEF4015BT,652 is available at Aetrix Electronics and suitable for industrial control logic, LED matrix drivers, legacy microcontroller I/O expansion, and test equipment signal conditioning requiring stable component supply across extended temperature and voltage ranges.

Supply support for HEF4015BT,652 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 - serving automotive, industrial, and consumer markets with JEDEC-compliant components.

The HEF4015BT,652 belongs to Nexperia's legacy CMOS logic family, designed specifically for robust serial-to-parallel conversion in industrial automation and equipment where wide supply range, ESD resilience, and long-term availability are critical.

FAQ

What is the clock edge sensitivity of the HEF4015BT,652?

The HEF4015BT,652 is strictly LOW-to-HIGH edge-triggered on both 1CP and 2CP inputs. Data present at 1D or 2D is sampled and shifted into Q0 on the rising edge; no response occurs on falling edges or level changes. This behavior is confirmed in the functional description and timing diagrams of the official datasheet Rev. 11.

Can the HEF4015BT,652 operate at 3.3 V supply?

Yes - the HEF4015BT,652 is fully specified down to 3.0 V supply voltage per Table 5 (Recommended Operating Conditions). At 3.3 V, it maintains guaranteed functionality including setup/hold times and output drive, though maximum clock frequency reduces to approximately 12 MHz based on extrapolated dynamic characteristics.

How does the master reset (nMR) interact with clock and data inputs?

The master reset inputs (1MR and 2MR) are asynchronous and active HIGH: asserting either pin immediately forces its corresponding Q0–Q3 outputs LOW, regardless of nCP or nD state. The reset overrides all clock activity and requires a minimum pulse width of 20 ns at VDD = 15 V, as defined in Table 7.

Is the HEF4015BT,652 pin-compatible with older HEF4015B variants?

Yes - the HEF4015BT,652 uses the same SOT109-1 (SO16) package and identical pinout as all HEF4015B-series devices, including legacy versions like HEF4015BP (SOT38-4) in adapted layouts. Electrical specifications and timing remain consistent across revisions, with Rev. 11 updating ESD ratings and package drawing alignment only.