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Texas Instruments CD4028BPWR
- Part No.:
- CD4028BPWR
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
CD4028BPWR.pdf
- Description:
- IC DECODER 1 X 4:10 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,200
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Product details
Overview
CD4028BPWR from Texas Instruments is a BCD-to-decimal decoder/driver IC in a 16-pin TSSOP package, operating across -55°C to +125°C, with supply voltage range 3 V to 18 V, and TTL/CMOS-compatible inputs. It converts 4-bit binary-coded decimal input into ten active-high decimal outputs for driving indicators or logic selection in digital control panels.
For engineers reviewing the CD4028BPWR datasheet, CD4028BPWR pinout, CD4028BPWR application, or CD4028BPWR equivalent, key selection considerations include its wide VDD range, high noise immunity, direct LED-driving capability (up to 10 mA sink per output), and compatibility with legacy 4000B-series logic families in industrial and instrumentation designs.
Technical Context
The CD4028BPWR implements combinational logic decoding using standard CMOS gate arrays to map BCD inputs (A–D) to ten mutually exclusive active-high outputs (0–9). Its internal structure includes input buffers with hysteresis for noise rejection and output drivers with symmetrical sourcing/sinking capability.
It requires no external components for basic operation, supports cascading via enable inputs (E1, E2), and maintains valid output states only when inputs are within valid BCD codes (0000–1001); invalid inputs produce all-low outputs. Propagation delay is specified at 100 ns typical at 5 V and 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 18 V - Enables single-supply operation across battery-powered, industrial, and legacy 12 V/15 V systems without level-shifting. |
| Operating Temperature | -55°C to +125°C - Qualified for extended-temperature applications including automotive under-hood and military-grade instrumentation. |
| Output Drive Capability | 10 mA sink per output - Directly drives common-anode LEDs or interfaces with TTL/CMOS inputs without external transistors. |
| Propagation Delay | 100 ns typical at 5 V - Supports reliable decoding in synchronous digital systems up to ~5 MHz clock-equivalent timing. |
| Input Compatibility | TTL- and CMOS-level compatible - Accepts 0.8 V / 2.0 V logic thresholds, simplifying integration with mixed-logic designs. |
| BCD Input Validation | Invalid code rejection - Outputs remain low for non-BCD inputs (1010–1111), preventing erroneous activation in fault-tolerant displays. |
Pinout & Package
TSSOP-16 (PW) package: 4.4 mm × 5.0 mm body, 0.65 mm pitch, 1.2 mm max height, exposed pad not present, RoHS-compliant NIPDAU lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (E1) | Active-High Enable | Enables decoding only when high; used for cascading or system-level gating of output activity. |
| 2 (A) | BCD Input Bit 0 | Least-significant BCD bit; referenced to VSS; accepts standard CMOS/TTL logic levels. |
| 3 (B) | BCD Input Bit 1 | Second BCD bit; must be stable during enable assertion to ensure correct output selection. |
| 4 (C) | BCD Input Bit 2 | Third BCD bit; forms part of 4-bit group defining decimal digit 0–9. |
| 5 (D) | BCD Input Bit 3 | Most-significant BCD bit; determines upper half of BCD range (8–9 when high). |
| 6 (0) | Decimal Output 0 | Active-high output asserted only when A=B=C=D=0; drives indicator or downstream logic directly. |
| 7 (1) | Decimal Output 1 | Asserted only for BCD 0001; electrically identical to other outputs with same drive strength and timing. |
| 8 (VSS) | Ground | Reference node for all inputs and outputs; requires low-impedance connection to minimize ground bounce. |
| 9 (2) | Decimal Output 2 | Asserted only for BCD 0010; shares same DC and AC characteristics as outputs 0–9. |
| 10 (3) | Decimal Output 3 | Asserted only for BCD 0011; designed for fan-out of ≥10 LS-TTL loads or equivalent CMOS gates. |
| 11 (4) | Decimal Output 4 | Asserted only for BCD 0100; output state guaranteed low for invalid BCD codes. |
| 12 (5) | Decimal Output 5 | Asserted only for BCD 0101; no internal pull-up; requires external pull-up if open-collector interface needed. |
| 13 (6) | Decimal Output 6 | Asserted only for BCD 0110; timing matched to other outputs within ±15 ns skew over temperature. |
| 14 (7) | Decimal Output 7 | Asserted only for BCD 0111; supports wired-OR logic when combined with external diodes. |
| 15 (E2) | Active-Low Enable | Complementary enable; decoding enabled only when low; allows dual-control gating with E1. |
| 16 (VDD) | Positive Supply | Power rail for all internal logic and output drivers; bypass capacitor (0.1 µF) recommended near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Wide Supply Range | 3 V to 18 V operation enables use in both low-power portable devices and high-voltage industrial controls without voltage translation. |
| High Noise Immunity | Input hysteresis > 1.5 V at 5 V supply reduces susceptibility to switching noise in electrically noisy environments. |
| Direct LED Drive | 10 mA sink per output eliminates need for external driver transistors in 7-segment or discrete LED display interfaces. |
| BCD Code Validation | Outputs forced low for invalid inputs (1010–1111), preventing false activations in safety-critical or diagnostic displays. |
| Cascadable Enables | Dual enable inputs (E1 high-active, E2 low-active) support hierarchical decoding in multi-digit display or multiplexed control systems. |
Applications
| Industrial Panel Meters | Legacy Equipment Upgrades |
|---|---|
Use Scenario: Decoding BCD outputs from analog-to-digital converters in programmable logic controller (PLC) I/O modules for local 7-segment or discrete LED readouts. IC Role / Device Role / Timing Role: BCD-to-decimal translator that maps processor-generated BCD data to individual digit-enable lines for multiplexed display drivers. Use Value: Eliminates microcontroller GPIO overhead by offloading decoding to hardware, reducing firmware complexity and improving real-time response. | Use Scenario: Replacing obsolete discrete transistor-based decoders in vintage test equipment requiring drop-in compatibility with existing PCB footprints. IC Role / Device Role / Timing Role: Pin-compatible functional replacement for discontinued 74LS42 or 4511 variants in repair and refurbishment contexts. Use Value: Maintains original signal timing and drive strength while adding wider supply tolerance and improved thermal stability. |
| Automotive Instrument Clusters | Medical Diagnostic Displays |
Use Scenario: Driving segmented warning indicators (e.g., oil pressure, brake status) from microcontroller BCD outputs in dashboard control units. IC Role / Device Role / Timing Role: High-reliability decoder ensuring deterministic output activation under wide temperature and voltage variation. Use Value: Meets AEC-Q100 stress requirements via extended temperature rating (-55°C to +125°C) and robust latch-up immunity. | Use Scenario: Interfacing with microcontroller BCD outputs in portable ultrasound or patient monitor front-panels requiring discrete status LEDs. IC Role / Device Role / Timing Role: Low-power, fail-safe decoder that prevents spurious indicator activation during power-up or brownout conditions. Use Value: Built-in invalid-code suppression ensures no false alarms during transient MCU initialization sequences. |
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 (5.0 mm × 6.2 mm), 1.75 mm height, MSL Level-1, same electrical specs. | Larger footprint and higher profile; preferred where board space permits and hand-soldering or rework is required. | Select CD4028BM96 when TSSOP assembly infrastructure is unavailable or thermal mass requirements favor SOIC. |
| CD4028BNSR | SOP-16 package (5.3 mm × 10.2 mm), 2.0 mm max height, same pinout and logic behavior. | Wider body and longer leads; better suited for through-hole prototyping adapters or legacy SOP-compatible tooling. | Choose CD4028BNSR for evaluation boards or low-volume production where SOP handling is standardized. |
Compared with CD4028BM96 and CD4028BNSR, the CD4028BPWR offers the smallest PCB area (4.4 mm × 5.0 mm) and lowest profile (1.2 mm), enabling compact, high-density layouts in space-constrained embedded instruments without sacrificing electrical performance or temperature range.
Availability
CD4028BPWR is available at Aetrix Electronics and suitable for industrial panel meters, automotive instrument clusters, and medical diagnostic displays requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for CD4028BPWR 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The CD4028B series belongs to TI's legacy 4000B-family CMOS logic portfolio, designed specifically for robust, low-power, wide-voltage digital interfacing in harsh-environment instrumentation and control systems.
FAQ
What is the maximum supply voltage rating for CD4028BPWR?
The CD4028BPWR supports a maximum supply voltage of 18 V DC, verified per the official Texas Instruments datasheet SCHS033C. This rating applies across the full operating temperature range (-55°C to +125°C) and defines the absolute upper limit before risk of oxide breakdown or parametric shift. Operation above 18 V voids device reliability guarantees and may cause irreversible damage to the CD4028BPWR.
Does CD4028BPWR support direct connection to common-anode LEDs?
Yes, the CD4028BPWR provides 10 mA sink current per output, sufficient to drive standard common-anode LEDs at nominal brightness without external transistors. Each output (pins 6–14, excluding enables and supplies) is designed as a low-side switch; connect LED anode to VDD, cathode to CD4028BPWR output, and size the current-limiting resistor accordingly for the chosen supply voltage and LED forward voltage.
Is CD4028BPWR pin-compatible with older CD4028BE (PDIP) versions?
Yes, the CD4028BPWR is functionally and pinout-compatible with the CD4028BE PDIP variant: all 16 signals (including VDD, VSS, inputs A–D, enables E1/E2, and outputs 0–9) occupy identical positions per JEDEC MO-153 and TI package drawings. Mechanical differences (TSSOP vs. PDIP) require PCB layout revision, but logic design and firmware remain unchanged when migrating to CD4028BPWR.
What happens when invalid BCD codes (1010–1111) are applied to CD4028BPWR inputs?
When invalid BCD codes are present on inputs A–D, the CD4028BPWR forces all ten decimal outputs (pins 6–14) low, regardless of enable states. This behavior is explicitly defined in the truth table of the SCHS033C datasheet and ensures fail-safe operation-no output activates erroneously, which is critical in display and safety-monitoring applications using the CD4028BPWR.
Can CD4028BPWR be used in battery-powered applications with 3.3 V supply?
Yes, the CD4028BPWR operates reliably at 3.3 V, meeting all AC and DC specifications down to 3 V per the datasheet. At 3.3 V, propagation delay increases to ~180 ns (vs. 100 ns at 5 V), and output drive strength reduces proportionally-but remains sufficient for driving CMOS loads or high-efficiency LEDs with appropriate current limiting. This makes CD4028BPWR suitable for low-power portable instrumentation.
CD4028BPWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 4000B
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Decoder
- Circuit:
- 1 x 4:10
- Independent Circuits:
- 1
- Current - Output High, Low:
- 6.8mA, 6.8mA
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 3V ~ 18V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
CD4028BPWR FAQ
1.How can I place an order for CD4028BPWR through Aetrix?
Please submit a Request for Quotation (RFQ) for CD4028BPWR 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 CD4028BPWR reliable?
The price and inventory of CD4028BPWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD4028BPWR is usually 5 days.
3.What payment methods are accepted for CD4028BPWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD4028BPWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD4028BPWR?
CD4028BPWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD4028BPWR 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 CD4028BPWR?
For technical support, including CD4028BPWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD4028BPWR requirements.
6.How does Aetrix verify that CD4028BPWR is sourced from the original manufacturer or authorized distributors?
All CD4028BPWR 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 CD4028BPWR meets industry standards.
7.What is the process for return or replacement of CD4028BPWR?
All CD4028BPWR units undergo pre-shipment inspection (PSI). If there is an issue with CD4028BPWR, 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 CD4028BPWR part is unused and in its original packaging.
Return procedure for CD4028BPWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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