STMicroelectronics HCF4518M013TR

Overview

HCF4518M013TR from STMicroelectronics is a dual BCD up counter IC in 16-pin SOP package, featuring synchronous internal carry propagation, positive/negative-edge clock triggering, and operation up to 6 MHz (typ.) at 10 V. It contains two independent 4-stage D-type flip-flop counters with separate clock, enable, and reset inputs per section, used for decade counting in digital timing and control systems such as frequency dividers and digital clocks.

For engineers reviewing the HCF4518M013TR datasheet, HCF4518M013TR pinout, HCF4518M013TR application, or HCF4518M013TR equivalent, key selection considerations include BCD counting capability, dual-counter independence, edge-triggering flexibility, supply voltage range (3–20 V), and quiescent current spec (≤600 µA at 15 V).

Technical Context

The HCF4518M013TR implements two identical asynchronous-reset, synchronous-enable BCD counters using CMOS D-type flip-flops. Each counter advances on either rising or falling clock edges depending on enable state, with internal carry generated synchronously after Q4 toggles.

It supports ripple cascading via Q4-to-Enable connection between sections, operates across –55°C to +125°C, and meets JEDEC JESD13B for B-series CMOS devices, with input leakage ≤100 nA at VDD = 18 V and noise margin ≥2.5 V at 15 V supply.

Key Specifications

Pinout & Package

Package: SO-16 (Small Outline, 16-pin, 3.9 mm body width, 1.27 mm pitch), per mechanical data PO13H.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual BCD up counter applications.

Compared with CD4018BE and MC14518BD, HCF4518M013TR delivers superior maximum clock speed at 15 V, tighter propagation delay consistency, and broader temperature and voltage ratings-making it optimal for new designs requiring robustness across industrial voltage rails and timing-critical decade counting.

Availability

HCF4518M013TR is available at Aetrix Electronics and suitable for digital clock displays, frequency division chains, and industrial sequence controllers requiring stable component supply and long-term obsolescence mitigation.

Supply support for HCF4518M013TR 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing analog, MCU, power, and discrete components for industrial, automotive, and consumer markets.

HCF4518M013TR belongs to the HCF4000B series of radiation-hardened, high-voltage CMOS logic ICs intended for ruggedized timing, counting, and control functions in harsh-environment electronics.

FAQ

Is HCF4518M013TR pin-compatible with CD4018?

Yes - HCF4518M013TR shares identical pinout, terminal functions, and DC electrical behavior with CD4018BE and MC14518BD. All three use the same 16-pin DIP/SOP layout with CLOCK A on pin 1, RESET A on pin 7, VSS on pin 8, and VDD on pin 16. No PCB redesign is needed for direct substitution.

What is the minimum recommended supply voltage for reliable BCD counting?

The HCF4518M013TR is specified for reliable operation down to 3 V, with verified BCD counting functionality and noise margin ≥1 V at 5 V. Below 3 V, propagation delays increase significantly and output drive weakens; sustained operation below 3 V is not characterized or guaranteed per datasheet limits.

Can HCF4518M013TR be used in asynchronous ripple-cascade mode?

Yes - Q4A or Q4B can drive ENABLE B or ENABLE A of another HCF4518 to implement ripple cascading, as confirmed in the "Typical Application" section (page 8). In this mode, the second counter advances only when the first completes a full BCD cycle, achieving ÷100 division with minimal external wiring.

Does HCF4518M013TR support mixed-edge triggering across its two counters?

Yes - each counter operates independently: ENABLE A and CLOCK A define edge sensitivity for Counter A, while ENABLE B and CLOCK B do the same for Counter B. This allows Counter A to respond to rising edges and Counter B to falling edges simultaneously, enabling phase-differential timing schemes without external inverters.