CD4515BF3A Texas Instruments Integrated Circuit (Ceramic Dual-In-Line Packages) In Stock
The CD4515BF3A is a CMOS 4-to-16 line decoder/demultiplexer with integrated address latches, operating from 3 V to 18 V supply in a 24-pin ceramic DIP package. It decodes a 4-bit latched address into one of 16 active-low outputs with a 50 pF load capacitance rating and 1.5 mA output sink current. Available from stock worldwide for industrial and legacy designs.
- Manufacturer
- Texas Instruments
- Package
- Ceramic Dual-In-Line Packages
- Pin Count
- 24
- Lifecycle
- ACTIVE
- Datasheet
- CD4515BF3A 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 CD4515BF3A?
- 4-to-16 line decoder with on-chip address latches enabling direct connection to multiplexed address buses without external latch ICs
- Wide supply voltage from 3 V to 18 V CMOS operation accommodating both 5 V TTL-compatible and legacy high-voltage 15 V systems
- 24-pin ceramic DIP package offering superior reliability and hermetic sealing for military, aerospace, and high-reliability industrial environments
- Active-low decoded outputs with independent latch strobe and enable inputs for flexible bus expansion and memory chip-select decoding
What is CD4515BF3A used for?
The CD4515BF3A is used in memory address decoding, I/O port expansion, and multiplexed display driving circuits where a 4-bit address selects one of 16 outputs in legacy and high-reliability systems. Its integrated address latch makes it directly compatible with multiplexed microprocessor buses used in 8-bit and early 16-bit embedded systems. The ceramic DIP package is preferred for industrial and mil-spec designs requiring operation from -55°C to 125°C and enhanced moisture resistance.
What are the specifications of CD4515BF3A?
| YTEOL | 15 |
| Additional Feature | ADDRESS LATCHES |
| Family | 4000/14000/40000 |
| Input Conditioning | LATCHED |
| JESD-30 Code | R-GDIP-T24 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | 4-LINE TO 16-LINE DECODER |
| Max I(ol) | 0.0015A |
| Number of Bits | 16 |
| Number of Functions | 1 |
| Output Polarity | INVERTED |
| Package Body Material | CERAMIC, GLASS-SEALED |
| Package Equivalence Code | DIP24,.6 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Packing Method | TUBE |
| Power Supply Current-Max (ICC) | 3mA |
| Prop. Delay@Nom-Sup | 370ns |
| Propagation Delay (tpd) | 970ns |
| 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 Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Package | Ceramic Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
| Country of Origin | Thailand |
Where can I find the CD4515BF3A datasheet?
CD4515BF3A Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for CD4515BF3A?
Compatible alternatives and drop-in replacements for CD4515BF3A:
Frequently Asked Questions
What supply voltage range does CD4515BF3A support and how does that enable 15 V legacy system use?
CD4515BF3A operates from 3 V to 18 V, allowing it to function at 5 V for TTL-compatible systems and at 15 V for legacy CMOS systems that predate 3.3 V standardization. At 15 V supply the logic swing and noise margins are maximized, which was advantageous in early industrial control designs where long wire runs introduced noise coupling.
How does the built-in address latch of CD4515BF3A reduce external component count in bus-multiplexed designs?
CD4515BF3A integrates 4-bit address latches that capture the input address on the rising edge of the strobe signal, eliminating the need for an external 74HC373 or similar transparent latch between the multiplexed address bus and the decoder inputs. This reduces BOM count by at least 1 IC and saves PCB area in address decoding stages for 8-bit microprocessor systems.
What output sink current does CD4515BF3A provide and how does that limit LED driving capability?
CD4515BF3A provides a maximum output sink current of 1.5 mA per active-low output, which is insufficient to drive standard 20 mA LEDs directly. For LED matrix or indicator driving applications, a transistor or MOSFET buffer is required on each output to boost the sink current to the 10 mA to 20 mA range needed for visible illumination.
Why is the ceramic DIP package of CD4515BF3A preferred for military and aerospace designs over plastic DIP?
The ceramic DIP package used in CD4515BF3A provides hermetic sealing that prevents moisture ingress, yielding mean-time-to-failure far exceeding plastic packages in humid or pressurized environments. Ceramic packages also maintain dimensional stability and lead adhesion across the full -55°C to 125°C military temperature range specified for high-reliability applications.
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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.
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