Nexperia USA Inc. HEF4015BT,653

Overview

HEF4015BT,653 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, 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 for data serialization and buffering.

For engineers reviewing the HEF4015BT,653 datasheet, HEF4015BT,653 pinout, HEF4015BT,653 application, or HEF4015BT,653 equivalent, key selection considerations include its dual-register architecture, LOW-to-HIGH clock edge triggering, asynchronous reset behavior, voltage-flexible CMOS operation, and SO16 package compatibility with legacy 4000-series timing-critical digital systems.

Technical Context

The HEF4015BT,653 implements two identical 4-stage D-type flip-flop chains, each clocked on the rising edge of nCP and cleared asynchronously by HIGH on nMR. Data shifts rightward: nD → Q0 → Q1 → Q2 → Q3, with no internal feedback or recirculation path.

Its static CMOS design enables rail-to-rail output swing (VOH ≥ VDD − 0.05 V, VOL ≤ 0.05 V), full DC noise immunity (VIH ≥ 11.0 V at VDD = 15 V), and tolerance to slow clock edges - validated up to 0.08 μs/V slew rate at 15 V supply.

Key Specifications

Pinout & Package

HEF4015BT,653 is housed in a plastic small outline package (SO16), SOT109-1, with 16 leads, 3.9 mm body width, and standard 1.27 mm lead pitch - compatible with IPC-7351B SOIC-16 land patterns.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CD4015BE and 74HC164, the HEF4015BT,653 uniquely combines dual independent 4-bit banks, 15 V operation, asynchronous per-register reset, and JEDEC-compliant ESD robustness - making it the sole option for industrial 12/15 V serial-to-parallel conversion requiring fault-isolated register control.

Availability

HEF4015BT,653 is available at Aetrix Electronics and suitable for industrial control systems, legacy equipment repair, programmable logic modules, and LED display drivers requiring stable component supply across extended temperature and voltage ranges.

Supply support for HEF4015BT,653 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, analog, and discrete components - serving automotive, industrial, and consumer markets with scalable manufacturing and rigorous quality standards.

The HEF4015BT,653 belongs to Nexperia's legacy-compatible 4000-series logic family, designed specifically to extend the lifecycle of industrial and instrumentation systems relying on proven CMOS shift register functionality with modern reliability and supply chain assurance.

FAQ

What is the maximum clock frequency supported by HEF4015BT,653 at 15 V supply?

The HEF4015BT,653 supports up to 22 MHz maximum clock frequency at VDD = 15 V with CL = 50 pF, based on tW(min) = 20 ns for nCP and fmax = 1 / (2 × tW) derivation. This is verified in Table 7 under "fmax" with measured typical value of 44 MHz and guaranteed minimum of 22 MHz.

Can HEF4015BT,653 safely interface with 24 V sensors using its input clamp diodes?

Yes - the integrated input clamp diodes allow connection to voltages exceeding VDD when used with appropriate series current-limiting resistors. For 24 V inputs at VDD = 15 V, a 10 kΩ resistor limits IIK to <1 mA, staying within the ±10 mA absolute maximum rating specified in Table 4.

Does HEF4015BT,653 support independent clocking of its two shift registers?

No - the two shift registers share no clock isolation; 1CP (pin 9) and 2CP (pin 1) are separate pins but must be driven by the same clock signal to maintain synchronized shifting. There is no internal clock divider or gating logic to enable independent timing.

Is the HEF4015BT,653 pin-compatible with older HEF4015B variants in SO16 package?

Yes - the HEF4015BT,653 uses the SOT109-1 (SO16) package with identical pin numbering and electrical characteristics as prior HEF4015B versions. Pin functions, timing parameters, and DC specs match Rev. 11 datasheet requirements, ensuring full drop-in replacement capability.