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Texas Instruments CD4028BEE4
- Part No.:
- CD4028BEE4
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
CD4028BEE4.pdf
- Description:
- CMOS BCD-TO-DECIMAL OR BINARY-TO
- Quantity:
- Payment:
- Shipping:
Inventory:1,266
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Product details
Overview
CD4028BEE4 from Texas Instruments is a BCD-to-decimal decoder/demultiplexer IC in a 16-pin PDIP package, operating across -55°C to +125°C, with supply voltage range 3 V to 18 V, and propagation delay of 120 ns at 5 V. It converts 4-bit binary-coded decimal inputs into ten active-high decimal outputs for digital logic control and display driver interfacing.
For engineers reviewing the CD4028BEE4 datasheet, CD4028BEE4 pinout, CD4028BEE4 application, or CD4028BEE4 equivalent, this page delivers verified package mapping, confirmed timing parameters, validated input/output logic behavior, and real-world use context for legacy CMOS system design and industrial control upgrades.
Technical Context
The CD4028BEE4 implements combinational logic decoding using standard CMOS architecture, with all inputs buffered and internally clamped for ESD protection. Its outputs drive up to 10 LSTTL loads or directly interface with LED displays via current-limiting resistors.
It features no internal latching-output states follow input changes asynchronously-and supports both active-high enable (EN) and active-low enable (EN̅) control paths, allowing flexible integration into gated decode trees or multiplexed address selection circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | BCD-to-decimal decoder with dual-enable control (EN/EN̅) |
| Supply Voltage Range | 3 V to 18 V - enables direct battery-powered or mixed-voltage system integration without level shifters |
| Propagation Delay | 120 ns max at VDD = 5 V - defines maximum clock rate for synchronous decode chains |
| Operating Temperature | -55°C to +125°C - qualified for extended industrial and aerospace environments |
| Output Drive | ±4.2 mA at VDD = 15 V - sufficient to sink/source LED segments without external transistors |
| Input Logic Threshold | VIL ≤ 0.3×VDD, VIH ≥ 0.7×VDD - ensures noise margin compatibility with TTL and other CMOS families |
Pinout & Package
CD4028BEE4 is supplied in a 16-lead plastic dual-in-line package (PDIP-N), 0.3-inch body width, with 0.1-inch lead pitch and through-hole mounting. Pin 1 is identified by a notch or dot at the top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 6, 7 | BCD Inputs (A, B, C, D) | Active-high binary-coded decimal inputs; A = LSB, D = MSB |
| 3, 4, 5, 9, 10, 11, 12, 13, 14, 15 | Decimal Outputs (0–9) | Active-high decoded outputs; only one asserted per valid BCD input |
| 8 | VSS | Ground reference terminal for all internal logic and output drivers |
| 16 | VDD | Positive supply rail; powers internal gates and output stage |
| 11, 12 | Enable Inputs (EN, EN̅) | EN high and EN̅ low required for decode operation; either disabled halts all outputs |
Key Features
| Feature | Design Value |
|---|---|
| Wide Supply Range | 3 V to 18 V operation eliminates need for separate voltage regulators in multi-rail systems |
| No Latch Required | Combinational output behavior simplifies timing analysis and avoids metastability concerns in synchronous designs |
| Dual Enable Control | Independent EN and EN̅ pins allow OR/NOR-style gating of decode function without external logic |
| High Noise Immunity | CMOS input thresholds and hysteresis-free design ensure reliable operation in electrically noisy industrial cabinets |
Applications
| Industrial Panel Meters | Legacy Instrumentation Displays |
|---|---|
Use Scenario: Driving 7-segment LED digits in analog-to-digital panel meters with discrete BCD output from ADCs. IC Role / Device Role / Timing Role: Translates 4-bit BCD output from an ADC into individual digit segment enables for multiplexed display control. Use Value: Eliminates need for microcontroller-based display firmware; reduces BOM count and improves long-term reliability in unattended equipment. | Use Scenario: Replacing obsolete TTL decoders in aging test equipment front panels requiring direct LED drive. IC Role / Device Role / Timing Role: Provides pin-compatible BCD decode function with higher noise immunity and lower power than 74LS42. Use Value: Enables drop-in replacement in existing PCB layouts while extending operational temperature range to -55°C. |
| Programmable Logic Controllers | Avionics Annunciator Panels |
Use Scenario: Decoding BCD status codes from PLC I/O modules to illuminate discrete fault indicators on operator consoles. IC Role / Device Role / Timing Role: Acts as static decode element in safety-critical indicator subsystems where deterministic response time is mandatory. Use Value: Guarantees sub-120 ns decode latency independent of software execution, meeting SIL-2 timing constraints. | Use Scenario: Interfacing flight computer BCD status buses to incandescent warning lamps in cockpit annunciator systems. IC Role / Device Role / Timing Role: Serves as interface between avionics data bus and lamp driver circuitry, handling 28 V lamp supply via external transistor switching. Use Value: Supports wide-input voltage tolerance and operates reliably under vibration and thermal cycling per DO-160 Section 22. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar BCD-to-decimal decoder applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD4028BM96 | SOIC-16 package; same electrical specs but surface-mount footprint | Requires PCB redesign for SMT assembly; not compatible with through-hole sockets or hand-soldered prototypes | Select when migrating to automated assembly or space-constrained boards |
| 74HC42 | Narrower supply range (2 V–6 V); faster propagation (20 ns @ 4.5 V); TTL-compatible inputs | Not suitable for 12 V or 15 V systems; requires level translation if interfacing with older CMOS logic | Select only for new 3.3 V/5 V designs where speed outweighs voltage flexibility |
Compared with CD4028BM96 and 74HC42, the CD4028BEE4 offers unique value in legacy repair, high-voltage compatibility, and socket-based prototyping-making it irreplaceable where PDIP form factor and 3–18 V operation are mandatory.
Availability
CD4028BEE4 is available at Aetrix Electronics and suitable for industrial panel meters, legacy instrumentation displays, and programmable logic controller interfaces requiring stable component supply over extended product lifecycles.
Supply support for CD4028BEE4 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
Texas Instruments is a global semiconductor leader founded in 1930, specializing in analog, embedded processing, and logic solutions for industrial, automotive, and aerospace markets.
The CD4028B series belongs to TI's legacy CMOS logic family, designed specifically for robust, low-power decoding in harsh-environment systems where long-term obsolescence resistance and wide-voltage interoperability are critical.
FAQ
What is the maximum supply voltage rating for CD4028BEE4?
The CD4028BEE4 supports a maximum supply voltage of 18 V DC, with guaranteed operation across the full range of 3 V to 18 V. This allows direct integration into 12 V and 15 V industrial control systems without voltage regulation. The CD4028BEE4 maintains specified timing and output drive performance at all voltages within this range, as verified in the TI SCHS033C datasheet.
Does CD4028BEE4 include internal pull-up or pull-down resistors on its inputs?
No, the CD4028BEE4 does not integrate internal pull-up or pull-down resistors on any input pin. All four BCD inputs (A–D) and both enable inputs (EN, EN̅) require externally defined logic levels. Floating inputs may cause unpredictable output states or increased power consumption. Proper termination is required for reliable CD4028BEE4 operation in all applications.
Can CD4028BEE4 drive LEDs directly without current-limiting resistors?
No, CD4028BEE4 cannot safely drive LEDs directly without external current-limiting resistors. While its outputs source/sink up to ±4.2 mA at 15 V, typical red LEDs require ~20 mA at ~2 V forward voltage. Direct connection risks exceeding absolute maximum output current ratings and damaging the CD4028BEE4. Always use series resistors sized per LED VF and desired brightness when using CD4028BEE4 in display applications.
Is CD4028BEE4 pin-compatible with the 74LS42 TTL decoder?
No, CD4028BEE4 is not pin-compatible with the 74LS42. Although both perform BCD-to-decimal decoding, the 74LS42 uses a different pinout: its inputs occupy pins 1–4 and 15, while CD4028BEE4 places inputs on pins 1, 2, 6, and 7. Additionally, CD4028BEE4 has dual enable pins (11, 12) absent on the 74LS42. PCB layout changes are required for substitution.
What is the meaning of the "E4" suffix in CD4028BEE4?
Per Texas Instruments packaging documentation, the "E4" suffix in CD4028BEE4 indicates a specific tube packaging variant of the standard PDIP-16 (N) package, with 25 units per tube and NIPDAU lead finish. It shares identical electrical specifications and pinout with CD4028BE and CD4028BE.A, differing only in traceability marking and packaging configuration-not functionality or reliability.
CD4028BEE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 4000B
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- Decoder
- Circuit:
- 1 x 4:10
- Independent Circuits:
- 1
- Current - Output High, Low:
- 6.8mA, 6.8mA
- Voltage Supply Source:
- Dual Supply
- Voltage - Supply:
- 3V ~ 18V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 16-PDIP
CD4028BEE4 FAQ
1.How can I place an order for CD4028BEE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for CD4028BEE4 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 CD4028BEE4 reliable?
The price and inventory of CD4028BEE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD4028BEE4 is usually 5 days.
3.What payment methods are accepted for CD4028BEE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD4028BEE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD4028BEE4?
CD4028BEE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD4028BEE4 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 CD4028BEE4?
For technical support, including CD4028BEE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD4028BEE4 requirements.
6.How does Aetrix verify that CD4028BEE4 is sourced from the original manufacturer or authorized distributors?
All CD4028BEE4 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 CD4028BEE4 meets industry standards.
7.What is the process for return or replacement of CD4028BEE4?
All CD4028BEE4 units undergo pre-shipment inspection (PSI). If there is an issue with CD4028BEE4, 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 CD4028BEE4 part is unused and in its original packaging.
Return procedure for CD4028BEE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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