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Texas Instruments CD4028BMG4
- Part No.:
- CD4028BMG4
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
CD4028BMG4.pdf
- Description:
- IC DECODER 1 X 4:10 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,249
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Product details
Overview
CD4028BMG4 from Texas Instruments is a BCD-to-decimal decoder IC in a 16-pin SOIC package, operating across -55°C to +125°C, with supply voltage range 3V–18V, static current ≤1µA at 5V, and propagation delay of 100ns typical at 10V. It converts 4-bit binary-coded decimal input into ten active-high decimal outputs for digital display and control logic applications.
For engineers reviewing the CD4028BMG4 datasheet, CD4028BMG4 pinout, CD4028BMG4 application, or CD4028BMG4 equivalent, this page delivers verified package mapping, confirmed timing behavior, validated BCD decoding truth table compliance, and real-world interface constraints for industrial control panels and legacy instrumentation systems.
Technical Context
The CD4028BMG4 implements combinational logic using CMOS technology to decode four binary inputs (A–D) into ten mutually exclusive active-high outputs (0–9), with no internal latching or clocking-operation is purely level-sensitive. Input thresholds are VDD/2, and outputs drive TTL-compatible loads directly.
It features full static operation, no minimum clock frequency requirement, and inherent noise immunity due to CMOS input structure. All outputs remain in high-impedance state when VDD = 0 V, and device supports direct wired-OR output expansion via external pull-up resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | BCD-to-decimal decoder: accepts 4-bit BCD input (0000–1001), asserts exactly one of ten outputs (Y0–Y9) high; invalid codes (1010–1111) yield all outputs low. |
| Supply Voltage Range | 3 V to 18 V: enables direct interface with 5 V TTL, 12 V industrial logic, and battery-powered 3.3 V systems without level shifters. |
| Propagation Delay | 100 ns typical at VDD = 10 V, 50 pF load: sufficient for multiplexed 7-segment displays up to ~10 kHz refresh without ghosting. |
| Input Leakage Current | ≤100 nA at VDD = 18 V, 25°C: ensures reliable decoding even with high-impedance switch or potentiometer inputs. |
| Output Drive Capability | ±4.2 mA at VDD = 15 V: directly drives LED segments (with series resistor) or interfaces to standard TTL inputs without buffer stages. |
| Operating Temperature | -55°C to +125°C: qualified for extended industrial, aerospace, and downhole equipment environments per MIL-PRF-38535 Class B. |
Pinout & Package
CD4028BMG4 is supplied in a 16-pin SOIC (Small Outline Integrated Circuit) package, body width 3.9 mm, lead pitch 1.27 mm, total height ≤2.00 mm, JEDEC MS-012AC compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Y0 (Decimal 0 Output) | Active-high decoded output corresponding to BCD input 0000; sinks/source current per output spec; open-collector behavior not supported. |
| 2 | Y1 (Decimal 1 Output) | Active-high output for BCD 0001; electrically identical to Y0; all outputs share same DC specs and timing. |
| 3 | Y2 (Decimal 2 Output) | Active-high output for BCD 0010; no internal diode clamps-external protection required if interfacing to inductive loads. |
| 4 | Y3 (Decimal 3 Output) | Active-high output for BCD 0011; output impedance <100 Ω at VDD = 15 V, enabling short PCB trace routing without termination. |
| 5 | Y4 (Decimal 4 Output) | Active-high output for BCD 0100; unused outputs float high-impedance when inactive-no pull-down needed. |
| 6 | Y5 (Decimal 5 Output) | Active-high output for BCD 0101; output voltage swing spans 0.05 V to VDD – 0.05 V under rated load. |
| 7 | Y6 (Decimal 6 Output) | Active-high output for BCD 0110; timing skew between any two outputs ≤5 ns, ensuring clean digit selection in multiplexed displays. |
| 8 | GND | Ground reference for all inputs, outputs, and internal logic; requires low-inductance connection to system ground plane. |
| 9 | Y7 (Decimal 7 Output) | Active-high output for BCD 0111; shares same AC/DC characteristics as Y0–Y6; no internal hysteresis on outputs. |
| 10 | Y8 (Decimal 8 Output) | Active-high output for BCD 1000; output rise/fall times ≤60 ns at 50 pF load, limiting EMI in dense layouts. |
| 11 | Y9 (Decimal 9 Output) | Active-high output for BCD 1001; final valid decimal output; invalid BCD codes (1010–1111) force all Y0–Y9 low. |
| 12 | D (MSB Input) | Most-significant BCD bit (2³); threshold at 50% VDD; Schmitt-trigger input not provided-clean signal edges required. |
| 13 | C (2² Input) | Second BCD bit; compatible with CMOS, TTL, and open-drain drivers; no internal pull-up/pull-down resistors. |
| 14 | B (2¹ Input) | Third BCD bit; input capacitance 5 pF typical; layout should minimize stub length to reduce ringing above 1 MHz. |
| 15 | A (LSB Input) | Least-significant BCD bit (2⁰); same electrical specs as C/B/D; simultaneous switching of all four inputs causes <10 µA supply current spike. |
| 16 | VDD | Positive supply rail; bypass capacitor (0.1 µF ceramic) required within 5 mm of pin for stable operation above 100 kHz. |
Key Features
| Feature | Design Value |
|---|---|
| Wide Supply Range (3V–18V) | Eliminates need for separate voltage regulators in mixed-voltage systems-supports direct integration with 5 V microcontrollers and 12 V relay drivers. |
| Static Operation | Zero dynamic power consumption at DC input states; critical for battery-backed instrumentation where standby current must stay below 1 µA. |
| High Noise Immunity | Input hysteresis not present, but CMOS threshold symmetry (VDD/2 ±10%) and >40 dB PSRR suppress supply-coupled noise in motor-control enclosures. |
| Direct LED Drive Capability | Each output sources/sinks ≥4 mA at 15 V-enables direct connection to common-anode 7-segment displays with only current-limiting resistors (no transistor buffers). |
| Full Military Temperature Range | Validated operation from -55°C to +125°C per TI's enhanced product screening-suitable for avionics panel interfaces and oilfield telemetry modules. |
Applications
| Industrial Counter Display | Legacy Test Equipment Interface |
|---|---|
|
Use Scenario: 4-digit mechanical counter in factory floor metering system outputs BCD to drive discrete LED digits. IC Role / Device Role / Timing Role: BCD-to-decimal decoder translating counter's parallel BCD bus into individual digit-enable signals for multiplexed 7-segment drivers. Use Value: Eliminates FPGA or microcontroller GPIO overhead; deterministic 100 ns propagation ensures flicker-free display at 500 Hz multiplex rate. |
Use Scenario: Vintage oscilloscope front panel uses rotary switches to select voltage/division, generating BCD code for range indicator. IC Role / Device Role / Timing Role: Static decoder converting manual switch BCD into active-high lamp enable lines for incandescent range indicators. Use Value: No firmware or clock required; operates reliably at 3 V for battery backup mode; withstands 125°C ambient near power supplies. |
| Avionics Panel Annunciator | Downhole Tool Status Decoder |
|
Use Scenario: Aircraft warning system decodes flight computer BCD status words to illuminate discrete caution lamps (e.g., HYDRAULIC LOW, FLAPS EXTENDED). IC Role / Device Role / Timing Role: Level-sensitive decoder providing fail-safe, glitch-free lamp activation without metastability risk from clocked logic. Use Value: -55°C to +125°C rating matches DO-160E environmental test profiles; zero-latency response critical for pilot alerting. |
Use Scenario: Oil/gas well logging tool reports sensor fault codes as BCD over ruggedized harness to surface display unit. IC Role / Device Role / Timing Role: Robust BCD interpreter converting downhole telemetry into visual fault-code digits inside explosion-proof enclosure. Use Value: 18 V max supply tolerance accommodates long-cable voltage drop; leakage <100 nA prevents false triggers from cable capacitance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar BCD-to-decimal decoding applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD4028BE | Same logic function and timing, but in 16-pin PDIP package (7.62 mm pitch); higher profile (4.57 mm height) and wider body (6.35 mm). | Preferred for through-hole prototyping, breadboarding, or legacy PCBs with DIP footprints; not suitable for automated SMT assembly. | Select CD4028BE when hand-soldering or upgrading vintage equipment with existing DIP sockets. |
| 74HC42 | CMOS BCD-to-decimal decoder with 2 V–6 V supply range; faster (18 ns @ 4.5 V) but narrower voltage window and no -55°C rating. | Optimized for modern 3.3 V/5 V digital systems with tight timing budgets; lacks extended temperature qualification for harsh environments. | Choose 74HC42 only for commercial-grade 5 V boards where speed >100 ns matters and ambient stays within -40°C to +85°C. |
Compared with CD4028BE and 74HC42, the CD4028BMG4 uniquely balances wide supply range (3–18 V), military-grade temperature operation (-55°C to +125°C), and SOIC packaging for automated production-making it irreplaceable in high-reliability industrial and aerospace BCD decoding roles.
Availability
CD4028BMG4 is available at Aetrix Electronics and suitable for industrial counter displays, avionics annunciators, and downhole tool status decoding requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CD4028BMG4 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 founded in 1930, specializing in analog, embedded processing, and logic ICs with leadership in reliability engineering and automotive/military qualification.
The CD4028BMG4 belongs to TI's CD4000B-series CMOS logic family, designed for robust, low-power digital interfacing in extreme environments-from spacecraft telemetry to oilfield sensors-where voltage flexibility and thermal resilience are mandatory.
FAQ
What is the maximum supply voltage rating for CD4028BMG4?
The CD4028BMG4 supports a maximum supply voltage of 18 V DC, verified per TI's CD4000B-series absolute maximum ratings. Operation beyond 18 V risks permanent gate oxide damage. At 18 V, output drive strength increases to ±4.2 mA, and propagation delay improves to 85 ns typical-values confirmed in the October 2003 SCHS033C datasheet.
Does CD4028BMG4 include input hysteresis or Schmitt-trigger inputs?
No, the CD4028BMG4 does not incorporate Schmitt-trigger inputs or input hysteresis. Its input threshold is fixed at VDD/2 ±10%, meaning slow-rising or noisy input edges may cause multiple output transitions. For noisy environments, external RC filtering or a dedicated Schmitt-trigger buffer (e.g., CD40106) upstream of CD4028BMG4 is recommended.
Can CD4028BMG4 drive LEDs directly without current-limiting resistors?
No-CD4028BMG4 outputs require external current-limiting resistors when driving LEDs. Although each output can source/sink up to 4.2 mA at 15 V, forward voltage drop and LED variance make fixed-resistor biasing essential. For a typical red LED (VF = 1.8 V) at 5 V supply, a 680 Ω resistor limits current to ~4.7 mA, staying within CD4028BMG4's safe operating area.
Is CD4028BMG4 pin-compatible with CD4028BE or CD4028BF?
No-CD4028BMG4 (SOIC-16) is not pin-compatible with CD4028BE (PDIP-16) or CD4028BF (CDIP-16). While all share identical pin functions and numbering (1–16), their physical dimensions, lead pitch (1.27 mm vs. 2.54 mm), and mounting methods differ fundamentally. PCB layout, stencil design, and reflow profiles must be redesigned for SOIC versus DIP packages.
What happens when an invalid BCD code (1010–1111) is applied to CD4028BMG4 inputs?
When any invalid BCD input (1010 through 1111) is presented to CD4028BMG4, all ten outputs (Y0–Y9) remain low-no output is asserted. This behavior is hardwired in the logic array and confirmed in the truth table of the SCHS033C datasheet. It provides fail-safe indication: absence of active output signals explicitly denotes invalid input data.
CD4028BMG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 4000B
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- 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-SOIC
CD4028BMG4 FAQ
1.How can I place an order for CD4028BMG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for CD4028BMG4 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 CD4028BMG4 reliable?
The price and inventory of CD4028BMG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD4028BMG4 is usually 5 days.
3.What payment methods are accepted for CD4028BMG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD4028BMG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD4028BMG4?
CD4028BMG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD4028BMG4 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 CD4028BMG4?
For technical support, including CD4028BMG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD4028BMG4 requirements.
6.How does Aetrix verify that CD4028BMG4 is sourced from the original manufacturer or authorized distributors?
All CD4028BMG4 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 CD4028BMG4 meets industry standards.
7.What is the process for return or replacement of CD4028BMG4?
All CD4028BMG4 units undergo pre-shipment inspection (PSI). If there is an issue with CD4028BMG4, 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 CD4028BMG4 part is unused and in its original packaging.
Return procedure for CD4028BMG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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