CD4518BF3A Texas Instruments Integrated Circuit (Ceramic Dual-In-Line Packages) In Stock
Texas Instruments CD4518BF3A is a dual 4-bit BCD decade up-counter from the CD4000 CMOS logic family, featuring gated clock inputs with Schmitt-trigger on clock for noise-immune counting, in a 16-pin ceramic DIP package. Operates with 50 pF load capacitance. RoHS-compliant and available in tube packaging.
- Manufacturer
- Texas Instruments
- Package
- Ceramic Dual-In-Line Packages
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- CD4518BF3A Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of CD4518BF3A?
- Dual independent 4-bit BCD decade counters in one 16-pin package, halving component count in multi-digit display designs
- Schmitt-trigger clock inputs with gated clock architecture for reliable counting on slow or noisy clock edges
- CMOS CD4000 family wide supply voltage range supporting 3 V to 15 V operation across temperature extremes
What is CD4518BF3A used for?
The CD4518BF3A is widely used in event counting, frequency division, and BCD-to-seven-segment display driver chains in industrial control panels and digital instrumentation. Its dual-counter architecture enables cascaded counting for two-digit decimal displays with minimal external logic. The 16-pin ceramic DIP package suits prototyping, military, and high-reliability environments where ceramic packaging provides superior thermal stability.
What are the specifications of CD4518BF3A?
| Pbfree Code | Yes |
| YTEOL | 15 |
| Additional Feature | GATED CLOCK; SCHMITT TRIGGER ON CLOCK INPUT |
| Count Direction | UP |
| Family | 4000/14000/40000 |
| JESD-30 Code | R-GDIP-T16 |
| JESD-609 Code | e0 |
| Load Capacitance (CL) | 50pF |
| Load/Preset Input | NO |
| Logic IC Type | DECADE COUNTER |
| Max Frequency@Nom-Sup | 1500000Hz |
| Max I(ol) | 0.0015A |
| Mode of Operation | SYNCHRONOUS |
| Number of Bits | 4 |
| Number of Functions | 2 |
| Package Body Material | CERAMIC, GLASS-SEALED |
| Package Equivalence Code | DIP16,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Packing Method | TUBE |
| Power Supply Current-Max (ICC) | 0.03mA |
| Prop. Delay@Nom-Sup | 230ns |
| Propagation Delay (tpd) | 560ns |
| Qualification Status | Not Qualified |
| Screening Level | 38535Q/M;38534H;883B |
| Supply Voltage-Max (Vsup) | 18V |
| Supply Voltage-Min (Vsup) | 3V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | NO |
| Technology | CMOS |
| Temperature Grade | MILITARY |
| Terminal Finish | Tin/Lead (Sn/Pb) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Trigger Type | POSITIVE EDGE |
| fmax-Min | 4MHz |
| Package | Ceramic Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Where can I find the CD4518BF3A datasheet?
CD4518BF3A Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for CD4518BF3A?
Compatible alternatives and drop-in replacements for CD4518BF3A:
Decade Counter, 4000/14000/40000 Series, Synchronous, Positive Edge Triggered, 4-Bit, Up Direction, CMOS, CDIP16
Decade Counter, 4000/14000/40000 Series, Synchronous, Positive Edge Triggered, 4-Bit, Up Direction, CMOS, PDIP16
Frequently Asked Questions
How many independent decade counters does the CD4518BF3A contain, and what is their counting modulus?
The CD4518BF3A contains 2 independent 4-bit BCD decade counters, each with a modulus of 10 (counting 0 through 9). Both counters can operate simultaneously from separate clocks or be cascaded to form a 2-digit decimal counter for display or frequency-division applications.
What clock input feature in the CD4518BF3A improves counting reliability on noisy industrial signals?
The CD4518BF3A features Schmitt-trigger inputs on the clock pins, providing voltage hysteresis that prevents false triggering on slow-rising or noisy clock edges. Combined with the gated clock architecture, this allows the counter to operate reliably in environments with electrical noise, such as motor drives or relay-switched power systems.
What package does the CD4518BF3A use, and why is ceramic DIP preferred in certain applications?
The CD4518BF3A uses a 16-pin ceramic DIP (CDIP) package. Ceramic packaging offers superior moisture resistance and thermal stability compared to plastic DIP, making this part preferred for military, aerospace, and industrial applications where the operating temperature range and long-term reliability requirements exceed what standard plastic enclosures provide.
How does cascading two CD4518BF3A devices enable a 4-digit decimal counter system?
Each CD4518BF3A holds 2 decade counters with 4-bit BCD outputs, providing counting from 0 to 9 per stage. Cascading 2 devices (4 counter stages total) creates a 4-digit BCD counter capable of counting from 0 to 9999. The carry output of each decade stage clocks the next, and all 16 BCD output bits feed directly into BCD-to-7-segment decoder ICs for numeric display.
Related Guides
CSD87313DMS Synchronous Buck Power Stage Design Guide
Design a compact CSD87313DMS synchronous buck stage with practical guidance for loss, gate drive, PCB layout, EMI, thermal validation, and sourcing.
Aug 6, 2026
STEF05SGR eFuse Selection Guide for 5 V Overcurrent Protection
Choose STEF05SGR for 5 V overcurrent protection by checking current-limit margin, inrush, thermal loss, fault response, and sourcing.
Aug 6, 2026
C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC
Select C0402C103K3RACTU by voltage margin, X7R behavior, tolerance, 0402 assembly risk, and qualified alternatives.
Aug 4, 2026
STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security
Choose STM32H753VIT6 by evaluating memory architecture, LQFP-100 pin fit, connectivity, security, power, and sourcing tradeoffs.
Aug 4, 2026
Why Buy from FindMyChip
About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
More from Texas Instruments
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“We've been using FindMyChip for 2 years. Pricing is consistently 20-30% below Mouser/DigiKey for volume orders.”
You May Also Like
ACS770ECB-200U-PFF-T
Allegro Microsystems
Integrated Circuit
ACS770KCB-150U-PFF-T
Allegro Microsystems
Integrated Circuit
MC33901WEF
NXP
Integrated Circuit
MC7808BDTRKG
ON Semiconductor
Integrated Circuit
PA94EC
Apex Microtechnology
Integrated Circuit
AP7315-28SR-7
Diodes Inc.
Integrated Circuit
74HCT245D
Nexperia
Integrated Circuit
CY62256VNLL-70ZXCT
Cypress Semiconductor
Integrated Circuit
EPM7032AETC44-4N
Intel
Integrated Circuit
EPM3512AQC208-10N
Intel
Integrated Circuit
EPM3256ATC144-7N
Intel
Integrated Circuit
EPM3256AQC208-7N
Intel
Integrated Circuit
EPM3256AQC208-10N
Intel
Integrated Circuit
EPM3128ATC100-7N
Intel
Integrated Circuit
EPM1270F256C4N
Intel
Integrated Circuit
EPF8282ATC100-4N
Intel
Integrated Circuit
EPF6016QC208-2N
Intel
Integrated Circuit
EPF6016ATC144-3N
Intel
Integrated Circuit
EPF10K30ATC144-3N
Intel
Integrated Circuit
EPC2TI32N
Intel
Integrated Circuit
EPC2LC20
Intel
Integrated Circuit
EP3SL150F1152C4N
Intel
Integrated Circuit
EP2SGX60DF780C5N
Intel
Integrated Circuit
EP2SGX60CF780C5N
Intel
Integrated Circuit