My Inquiry
My Account
STMicroelectronics HCF4518BEY
- Part No.:
- HCF4518BEY
- Manufacturer:
- STMicroelectronics
- Category:
- Counters, Dividers
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
HCF4518BEY.pdf
- Description:
- IC BCD COUNTER DUAL 4-BIT 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,239
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
HCF4518BEY from STMicroelectronics is a dual BCD up counter IC in 16-pin DIP package, featuring synchronous internal carry propagation, positive- or 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 individual clock, enable, and reset inputs, and is rated for supply voltages from 3 V to 20 V. Used in digital timing, frequency division, and decade counting circuits in industrial control panels.
For engineers reviewing the HCF4518BEY datasheet, HCF4518BEY pinout, HCF4518BEY application, or HCF4518BEY equivalent, key selection criteria include BCD output compatibility, dual-counter independence, edge-triggering flexibility, wide VDD range (3–20 V), and ripple-cascading capability via Q4-to-enable interconnection.
Technical Context
The HCF4518BEY implements two identical, fully synchronous BCD (0–9) up-counters using D-type flip-flops with interchangeable clock and enable inputs-enabling increment on either rising or falling edges. Each counter has dedicated reset, clock, and enable lines, allowing independent control and asynchronous clear.
Carry propagation is internal and synchronous: Q4 outputs signal terminal count (1001 → 0000), enabling clean cascading without external logic. The device meets JEDEC JESD13B for B-series CMOS, with input leakage ≤100 nA at VDD = 18 V and guaranteed quiescent current testing up to 20 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 20 V - supports single-rail operation across legacy 5 V, 10 V, and 15 V logic systems |
| Max Clock Frequency | 6 MHz (typ.) at VDD = 10 V - enables reliable decade counting in medium-speed digital control loops |
| Output Drive | ±1.36 mA (IOH/IOL @ VDD = 5 V) - sufficient to drive TTL loads or multiple CMOS inputs directly |
| Propagation Delay | 115 ns (tPLH/tPHL, clock→Q, VDD = 10 V) - ensures predictable timing margins in synchronous cascaded chains |
| Input Leakage | ≤100 nA at VDD = 18 V - minimizes unintended state changes in high-impedance or battery-backed applications |
| Operating Temp | −55 °C to +125 °C - qualified for extended industrial and automotive under-hood environments |
Pinout & Package
Package: 16-pin plastic DIP (Dual In-line Package), 0.3-inch width, standard through-hole mounting per mechanical drawing P001C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Clock A | Edge-triggered input controlling Counter A increment; accepts rising or falling transitions |
| 2 | Enable A | Active-high gate enabling counting on Clock A; held high for free-running operation |
| 7 | Reset A | Asynchronous active-high reset forcing Q1A–Q4A = 0000 regardless of clock state |
| 3–6 | Q1A–Q4A | BCD outputs (Q1 = LSB, Q4 = MSB); Q4 pulses high at count = 9 for ripple cascade |
| 9 | Clock B | Independent edge-triggered clock input for Counter B |
| 10 | Enable B | Separate enable for Counter B, supporting independent or synchronized operation |
| 15 | Reset B | Asynchronous reset for Counter B only; no shared reset line between counters |
| 11–14 | Q1B–Q4B | Dual BCD outputs; electrically isolated from Counter A outputs |
| 8 | VSS | Negative supply reference (GND); required for CMOS bias and noise immunity |
| 16 | VDD | Positive supply rail (3–20 V); powers both counters and defines logic thresholds |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent BCD counters | Two functionally identical 4-bit decade counters with separate clock, enable, and reset - enables parallel timing or cascaded modulo-100 counting |
| Edge-triggering flexibility | Interchangeable clock/enable roles allow increment on rising or falling edge - eliminates need for external inverters in mixed-edge systems |
| Synchronous internal carry | Q4 output asserts only after full 0000→1001→0000 transition - prevents race conditions during ripple cascading |
| Wide supply voltage range | 3 V to 20 V operation with tested quiescent current - simplifies design across legacy and mixed-voltage boards |
| JEDEC B-series compliance | Fully conforms to JESD13B specifications - ensures interoperability with other industry-standard CMOS logic families |
Applications
| Industrial Timer Modules | Legacy Instrumentation Displays |
|---|---|
Use Scenario: Decade-based timing in programmable logic controllers for conveyor belt cycle control. IC Role / Device Role / Timing Role: Dual counter provides independent 10-second and 100-second time bases via cascaded Q4-to-enable connection. Use Value: Synchronous carry and wide VDD range ensure stable operation across varying 12 V DC field power supplies. | Use Scenario: Driving 7-segment LED displays in analog multimeters and panel meters. IC Role / Device Role / Timing Role: BCD outputs directly interface with decoder/driver ICs (e.g., CD4511) for digit display sequencing. Use Value: Guaranteed BCD output states and low output leakage prevent ghosting or flicker in multiplexed displays. |
| Frequency Division Circuits | Electromechanical Sequencer Logic |
Use Scenario: Dividing 1 kHz clock signals into 100 Hz and 10 Hz outputs for motor speed control. IC Role / Device Role / Timing Role: Each counter acts as ÷10 divider; cascaded pair achieves ÷100 with minimal external components. Use Value: Propagation delay consistency (115 ns typ. @ 10 V) ensures deterministic phase alignment across divisions. | Use Scenario: Controlling solenoid activation sequence in vending machines and coin acceptors. IC Role / Device Role / Timing Role: Counter stages drive relay drivers in fixed-order step sequences; reset lines enable manual restart. Use Value: Asynchronous reset and edge-triggering flexibility support both manual and sensor-initiated sequencing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual BCD up counter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD4018BE | Single 5-stage Johnson counter (not BCD); different output coding and reset behavior | Used in ring counters and non-decimal sequencing; lacks Q4 carry pulse for BCD cascade | Select only if Johnson counter topology and modulo-10 cycling (not strict BCD) are acceptable |
| HEF4018BP | Same functional spec as HCF4518B but in PDIP package with slightly higher max fCLK (7 MHz @ 15 V) | Drop-in replacement in most designs; identical pinout and BCD behavior | Preferred for new designs requiring marginally higher speed or Philips/NXP sourcing continuity |
Compared with CD4018BE and HEF4018BP, the HCF4518BEY delivers true dual BCD counting with synchronous carry and JEDEC-compliant parametric ratings across 3–20 V, making it uniquely suitable for legacy industrial decade timing where output coding and cascade reliability are critical.
Availability
HCF4518BEY is available at Aetrix Electronics and suitable for industrial timer modules, legacy instrumentation displays, frequency division circuits, and electromechanical sequencer logic requiring stable component supply and long-term obsolescence mitigation.
Supply support for HCF4518BEY 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 microcontrollers, power ICs, sensors, and analog/mixed-signal devices for industrial, automotive, and consumer markets.
The HCF4518BEY belongs to ST's legacy B-series CMOS logic family, engineered for robustness in wide-voltage, temperature-extreme, and noise-prone industrial control environments.
FAQ
Is HCF4518BEY pin-compatible with CD4518BE?
Yes - HCF4518BEY and CD4518BE share identical pinout, electrical characteristics, and functional behavior. Both are dual BCD up counters in 16-pin DIP packages with matching clock, enable, reset, and output assignments. No PCB redesign is needed for substitution.
Can HCF4518BEY operate reliably at 3.3 V?
No - the HCF4518BEY is not characterized or guaranteed below 3 V. Its minimum recommended supply is 3 V, and typical performance (e.g., 6 MHz max clock) is specified at 5 V, 10 V, and 15 V. At 3.3 V, timing margins degrade significantly and output drive falls outside specification.
What is the purpose of the Enable input on each counter?
The Enable input gates the clock: counting occurs only when Enable is high. This allows external logic to pause/resume counting without stopping the clock source - essential for gated timing windows, event synchronization, or power-gating in low-duty-cycle applications.
How is ripple cascading implemented between the two counters?
Ripple cascading connects Q4A (pin 6) to ENABLE B (pin 10), while CLOCK B (pin 9) is held low. When Counter A reaches 9 (1001), Q4A goes high, enabling Counter B to advance on the next CLOCK A edge - achieving modulo-100 counting with minimal wiring and no additional logic gates.
HCF4518BEY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- 4000B
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- BCD Counter
- Direction:
- Up
- Number of Elements:
- 2
- Number of Bits per Element:
- 4
- Reset:
- Asynchronous
- Timing:
- Synchronous
- Count Rate:
- 8 MHz
- Trigger Type:
- Positive, Negative
- Voltage - Supply:
- 3 V ~ 20 V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 16-DIP
HCF4518BEY FAQ
1.How can I place an order for HCF4518BEY through Aetrix?
Please submit a Request for Quotation (RFQ) for HCF4518BEY on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for HCF4518BEY reliable?
The price and inventory of HCF4518BEY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HCF4518BEY is usually 5 days.
3.What payment methods are accepted for HCF4518BEY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HCF4518BEY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HCF4518BEY?
HCF4518BEY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HCF4518BEY order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for HCF4518BEY?
For technical support, including HCF4518BEY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HCF4518BEY requirements.
6.How does Aetrix verify that HCF4518BEY is sourced from the original manufacturer or authorized distributors?
All HCF4518BEY products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that HCF4518BEY meets industry standards.
7.What is the process for return or replacement of HCF4518BEY?
All HCF4518BEY units undergo pre-shipment inspection (PSI). If there is an issue with HCF4518BEY, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The HCF4518BEY part is unused and in its original packaging.
Return procedure for HCF4518BEY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HCF4518BEY Tags
-
74HC393BQ,115
Nexperia USA Inc.
-
SN74LV8154PWR
Texas Instruments
-
MC14516BDR2G
onsemi
-
MC14020BDR2G
onsemi
-
MC100EP32DTR2G
onsemi
-
MC100EP016AMNG
onsemi
-
MC100EP016AFAG
onsemi
-
SN74LV163ADR
Texas Instruments
-
SN74LV163APWR
Texas Instruments
-
SN74HC393DR
Texas Instruments
-
SN74HC161DR
Texas Instruments
-
SN74HC163DR
Texas Instruments
Tech Hub
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
