CD4028BM Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Texas Instruments CD4028BM is a CMOS BCD-to-decimal decoder with 10 outputs, operating from 3 V to 15 V supply in a 16-pin SOIC package. Compatible with the 4000-series CMOS family and drives up to 1.5 mA per output for display and relay applications. Available with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- CD4028BM 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 CD4028BM?
- BCD-to-decimal decoder with 10 active-high output lines for direct decimal digit selection
- Wide supply voltage range of 3 V to 15 V compatible with both 5 V TTL and 12 V CMOS systems
- 1.5 mA output sink current per pin suitable for driving LEDs, relays, and small logic loads
- Standard 4000-series CMOS logic for drop-in replacement of legacy decoder ICs in existing designs
What is CD4028BM used for?
The CD4028BM is used in numeric display driving circuits, keyboard scanning matrices, and multiplexed relay control panels where a BCD-encoded microcontroller output must activate one of 10 discrete output lines. Its wide supply range from 3 V to 15 V allows it to interface directly with both CMOS and bipolar logic families in industrial control systems and laboratory instruments. Legacy board designs using the 4000-series CMOS family benefit from its direct pin-for-pin compatibility with the CD4028 standard.
What are the specifications of CD4028BM?
| YTEOL | 0 |
| Family | 4000/14000/40000 |
| Input Conditioning | STANDARD |
| JESD-30 Code | R-PDSO-G16 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | DECIMAL DECODER/DRIVER |
| Max I(ol) | 0.0015A |
| Number of Bits | 10 |
| Number of Functions | 1 |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP16,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TUBE |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 3mA |
| Prop. Delay@Nom-Sup | 160ns |
| Propagation Delay (tpd) | 350ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 18V |
| Supply Voltage-Min (Vsup) | 3V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | MILITARY |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Mexico |
Where can I find the CD4028BM datasheet?
CD4028BM Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for CD4028BM?
Compatible alternatives and drop-in replacements for CD4028BM:
Decimal Decoder/Driver, 4000/14000/40000 Series, True Output, CMOS, PDSO16
Frequently Asked Questions
What is the supply voltage range of the CD4028BM and how does that affect system compatibility?
The CD4028BM operates from 3 V to 15 V supply, making it directly compatible with 5 V TTL-level systems, 12 V industrial CMOS circuits, and 3.3 V microcontroller outputs with level-shifting. This wide range reduces the need for additional voltage translators in mixed-voltage board designs.
How does the CD4028BM decode a BCD input and how many output pins does it activate?
The CD4028BM accepts a 4-bit BCD input (0000 to 1001) and drives exactly 1 of its 10 output lines high while keeping the remaining 9 outputs low. For BCD codes 1010 to 1111, all 10 outputs remain low, providing built-in invalid-code detection useful in decade counter display systems.
Can the CD4028BM directly drive an LED segment display or relay coil?
The CD4028BM can sink up to 1.5 mA per output at 5 V supply, which is sufficient to drive low-current LEDs with a 330 Ω series resistor. For relay coils requiring 20 mA or more, a transistor driver such as 2N2222 is needed between the CD4028BM output and the relay, as the CMOS output current is limited to 1.5 mA.
Is CD4028BM a drop-in replacement for older 4000-series BCD decoders from other manufacturers?
Yes, the CD4028BM conforms to the industry-standard 4000-series CMOS specification, making it electrically and pin-compatible with CD4028 variants from Intersil, ON Semiconductor, and NXP in the 16-pin SOIC package. Designers can substitute it without schematic or PCB changes in legacy systems as long as the 3 V to 15 V supply range and 1.5 mA output drive spec are within the design margin.
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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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