NXP Semiconductors HEF4514BP,652

Overview

HEF4514BP,652 from NXP Semiconductors (formerly Philips) is a 1-of-16 decoder/demultiplexer with input latches, used for address decoding and digital multiplexing in MSI logic systems. It features four binary-weighted address inputs (A0–A3), active-LOW enable (E), latch-enable (EL), and 16 mutually exclusive active-HIGH outputs (O0–O15). Typical propagation delay is 233 ns at VDD = 5 V, CL = 50 pF.

For engineers reviewing the HEF4514BP,652 datasheet, HEF4514BP,652 pinout, HEF4514BP,652 application, or HEF4514BP,652 equivalent, key selection criteria include latch-controlled output stability, active-HIGH decoded output drive, E/EL signal timing margins, and compatibility with LOCMOS 4000B-family logic levels and supply ranges (3–15 V).

Technical Context

The HEF4514BP,652 implements a 4-bit binary-to-16-line decoding function with transparent latching: when EL is HIGH, outputs follow A0–A3 in real time; when EL transitions LOW, the current address is latched and held independent of further A-input changes. The E input enables/disables all outputs without affecting latch state.

It operates as either a decoder (A0–A3 as address, E as global enable) or demultiplexer (E as data input, A0–A3 as select lines). All outputs are active-HIGH and mutually exclusive - only one output is HIGH per valid address, with all others LOW.

Key Specifications

Pinout & Package

HEF4514BP,652 is supplied in a 24-lead dual in-line plastic package (DIP), SOT101-1, with 0.3-inch body width and through-hole mounting.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 1-of-16 decoder/demultiplexer applications.

Compared with HEF4514BP,652, CD4514BE offers identical timing and drop-in compatibility, while MC14514BDR2G trades minor speed reduction for broader temperature rating and modern packaging - both require no PCB changes but differ in sourcing and qualification scope.

Availability

HEF4514BP,652 is available at Aetrix Electronics and suitable for memory address decoding, digital multiplexing, hexadecimal display control, and industrial I/O expansion requiring stable component supply and long-term obsolescence management.

Supply support for HEF4514BP,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

NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications, with heritage in Philips' logic IC development.

The HEF4514BP,652 belongs to the LOCMOS HE4000B logic family, designed specifically for reliable, low-power MSI functions in mixed-voltage industrial control and legacy system upgrades.

FAQ

What is the logic family and technology node of the HEF4514BP,652?

The HEF4514BP,652 is part of the LOCMOS HE4000B logic family, fabricated using Philips' low-power complementary metal-oxide-semiconductor process. It is not a CMOS or TTL derivative but a proprietary LOCMOS implementation optimized for wide supply range (3–15 V), high noise immunity, and stable propagation characteristics across temperature - confirmed in the January 1995 Philips datasheet and Family Specifications document IC04.

Does the HEF4514BP,652 support latched operation with asynchronous address updates?

Yes - the HEF4514BP,652 supports latched operation: when EL is HIGH, outputs track A0–A3 in real time; when EL transitions LOW, the current A0–A3 values are captured and held regardless of subsequent address changes. This allows asynchronous address bus stabilization before enabling outputs via E, a core feature verified in the truth table and functional description of the HEF4514BP,652 datasheet.

What is the maximum clock/data rate supported by the HEF4514BP,652 in demultiplexer mode?

In demultiplexer mode (E = data, A0–A3 = select), the HEF4514BP,652 supports data rates up to ~2 MHz under typical conditions (VDD = 5 V, CL = 50 pF), based on its 233 ns typical An/EL→On propagation delay and minimum EL pulse width of 120 ns. Timing margins must account for setup/hold requirements (tsu = 120 ns, thold = 0 ns at VDD = 5 V), as specified in the HEF4514BP,652 AC characteristics table.

Is the HEF4514BP,652 pin-compatible with other 4000-series 1-of-16 decoders?

Yes - the HEF4514BP,652 shares identical pinout (SOT101-1 DIP24) and logic function with CD4514BE and MC14514BDR2G, including A0–A3, E, EL, O0–O15, VDD, and VSS assignments. This pin compatibility is confirmed across manufacturer datasheets and package outlines, enabling direct substitution without PCB modification for HEF4514BP,652 in legacy 4000B-family designs.

What are the absolute maximum ratings for VDD and operating temperature of the HEF4514BP,652?

The HEF4514BP,652 has an absolute maximum VDD rating of 18 V and operating ambient temperature range of −40°C to +85°C, per the Philips Semiconductors product specification dated January 1995. These limits are defined for continuous operation and align with standard LOCMOS HE4000B family specifications - exceeding them risks permanent damage or parametric shift in the HEF4514BP,652.