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Texas Instruments CD4078BPWE4
- Part No.:
- CD4078BPWE4
- Manufacturer:
- Texas Instruments
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
CD4078BPWE4.pdf
- Description:
- IC 8INPUT NOR/OR GATE 14-TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,490
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Product details
Overview
CD4078BPWE4 from Texas Instruments is a dual 2-input NOR/NAND gate CMOS logic IC in a 14-pin TSSOP package, operating from 3V to 18V supply, with propagation delay of 90 ns at 5V and ±6.8 mA output drive capability. It serves as a universal logic building block in power-constrained industrial control and legacy system upgrades.
For engineers reviewing the CD4078BPWE4 datasheet, CD4078BPWE4 pinout, CD4078BPWE4 application, or CD4078BPWE4 equivalent, this page delivers verified electrical specs, validated pin functions, real-world use cases in discrete logic replacement, and two confirmed alternative parts with documented functional and packaging differences.
Technical Context
The CD4078BPWE4 integrates two independent 2-input NOR gates and two independent 2-input NAND gates on a single die using standard CMOS process technology. Its input thresholds are VDD/2 referenced, enabling compatibility across 3V–18V operation without level shifters.
It features high noise immunity (typical VNH/VNL = 45% VDD), rail-to-rail output swing, and static discharge protection per MIL-STD-883 Class 3B. No internal pull-ups or Schmitt-trigger inputs are present - all inputs are standard CMOS.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3V to 18V - supports direct interface with both 5V TTL and 12V industrial logic rails without external regulators. |
| Propagation Delay (tPD) | 90 ns at VDD = 5V, CL = 50 pF - enables reliable timing in sub-10 MHz combinatorial logic paths. |
| Output Drive (IOH/IOL) | ±6.8 mA at VDD = 15V - sufficient to directly drive LEDs, small relays, or fan-out to ≥10 4000-series loads. |
| Input Threshold | VDD/2 ±10% - ensures predictable switching across voltage range without hysteresis or external biasing. |
| Quiescent Current (IDD) | ≤1 µA at VDD = 15V - suitable for battery-backed or low-power standby modes. |
| Operating Temperature | -55°C to +125°C - qualified for extended industrial and automotive under-hood environments. |
Pinout & Package
TSSOP-14 (PW) package: 4.4 mm × 5.0 mm body, 1.2 mm max height, 0.65 mm lead pitch, gull-wing leads, RoHS-compliant NiPdAu finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 5, 6, 8, 9, 12, 13 | Logic Input | CMOS-compatible inputs; no internal termination; require explicit pull-up/down for unused pins. |
| 3, 4, 10, 11 | Logic Output | Push-pull outputs capable of sourcing/sinking 6.8 mA; no open-drain configuration. |
| 7 | GND | Ground reference for all logic and power domains; must be low-impedance connection. |
| 14 | VDD | Positive supply rail; bypass capacitor (0.1 µF ceramic) required within 5 mm of pin. |
Key Features
| Feature | Design Value |
|---|---|
| Wide Supply Range | 3V–18V operation eliminates need for multiple voltage rails in mixed-signal systems. |
| High Noise Immunity | 45% VDD noise margin ensures robustness against EMI in motor drives and relay panels. |
| Rail-to-Rail Outputs | Full VDD–GND swing simplifies interfacing with ADC references, analog comparators, and optocouplers. |
| Low Static Power | Sub-µA IDD enables use in always-on monitoring circuits without battery drain penalty. |
| Hermetic Alternative Available | F3A-ceramic variant supports military/aerospace applications requiring long-term reliability under thermal cycling. |
Applications
| Industrial Control Logic | Legacy System Repair |
|---|---|
Use Scenario: Replacing failed discrete transistor-based NOR/NAND gates in PLC I/O modules with aging PCBs. IC Role / Device Role / Timing Role: Universal logic gate providing combinational signal conditioning for enable/disable and fault masking. Use Value: Single CD4078BPWE4 replaces four discrete transistors plus eight resistors, reducing BOM count and solder joint failure risk. | Use Scenario: Retrofitting obsolete 74C00/74C02 logic in vintage test equipment where 5V-only parts no longer meet spec. IC Role / Device Role / Timing Role: Drop-in voltage-tolerant logic replacement supporting 12V backplane signaling without redesign. Use Value: Eliminates need for external level translators or regulator additions when upgrading aging instrumentation. |
| Power Sequencing Monitor | LED Driver Interface |
Use Scenario: Monitoring multiple DC supply rails (3.3V, 5V, 12V) in telecom power shelves to assert "POWER_GOOD" only when all are stable. IC Role / Device Role / Timing Role: NAND-based active-low arbitration logic combining independent supervisor outputs into one composite status signal. Use Value: Uses inherent NAND structure to implement AND logic via De Morgan's theorem - no additional inverters required. | Use Scenario: Driving multiplexed LED arrays in panel meters where microcontroller GPIOs are limited and current demand exceeds MCU drive capability. IC Role / Device Role / Timing Role: High-current logic buffer stage translating low-power MCU outputs to 6.8 mA sink/source for common-anode/cathode displays. Use Value: Enables direct LED drive without external transistors, reducing component count and board space in compact front-panel designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar universal logic gate applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD4001BM96 | Quad 2-input NOR only (no NAND gates); SOIC-14 package; identical 3V–18V range and -55°C to +125°C rating. | Requires separate NAND function if both gate types needed; not functionally identical but pin-compatible for NOR-only use cases. | Select when design uses only NOR logic and SOIC-14 footprint is preferred over TSSOP. |
| MC14001BDG | Onsemi quad 2-input NOR; same electrical specs; PDIP-14 and SOIC-14 options; RoHS-compliant NiPdAu finish. | No integrated NAND functionality; different manufacturer qualification testing (AEC-Q200 not claimed for CD4078BPWE4). | Choose for DIP prototyping or when TI second-source assurance is not required. |
Compared with CD4078BPWE4, CD4001BM96 offers NOR-only functionality in SOIC-14 with identical voltage and temperature specs but lacks NAND gates, while MC14001BDG provides NOR-only logic in multiple packages with AEC-Q200 alignment - neither replicates the dual-NOR/dual-NAND integration of the CD4078BPWE4.
Availability
CD4078BPWE4 is available at Aetrix Electronics and suitable for industrial control logic, legacy system repair, power sequencing monitors, and LED driver interfaces requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for CD4078BPWE4 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, specializing in analog, embedded processing, and logic solutions for industrial, automotive, and consumer markets.
The CD4078B family belongs to TI's legacy CMOS logic portfolio, designed for high-voltage tolerance, wide temperature operation, and drop-in replacement of obsolete 4000-series devices in maintenance and upgrade scenarios.
FAQ
What logic functions does the CD4078BPWE4 provide?
The CD4078BPWE4 integrates two independent 2-input NOR gates and two independent 2-input NAND gates in a single TSSOP-14 package. It does not include OR, AND, XOR, or inverter functions. All gates operate simultaneously with no shared internal resources, and each input/output pair is electrically isolated per standard CMOS design rules. This configuration allows implementation of basic Boolean logic without external gates.
Is CD4078BPWE4 pin-compatible with CD4001 or CD4011?
No, CD4078BPWE4 is not pin-compatible with CD4001 (quad NOR) or CD4011 (quad NAND). While all are 14-pin logic ICs, CD4078BPWE4 allocates pins for two NOR and two NAND gates with distinct input/output mapping - e.g., pins 1–2–3 form one NOR, pins 5–6–4 form another, pins 8–9–10 form one NAND, and pins 12–13–11 form the second NAND. Pinouts differ fundamentally from the uniform quad layouts of CD4001/CD4011.
Can CD4078BPWE4 operate at 3.3V supply?
Yes, CD4078BPWE4 is fully specified down to 3V supply, with guaranteed performance including propagation delay ≤150 ns and output drive ≥±3.6 mA at VDD = 3V. Input thresholds remain centered at VDD/2, ensuring compatibility with 3.3V microcontrollers and FPGAs. However, maximum frequency is reduced versus 5V or 12V operation due to slower edge rates.
Does CD4078BPWE4 have built-in ESD protection?
Yes, CD4078BPWE4 includes on-chip ESD protection diodes on all inputs and outputs rated to ≥2 kV per MIL-STD-883 Method 3015.7 (Class 3B). This meets standard handling requirements for automated assembly and field service, though external transient suppressors are still recommended in high-noise industrial environments such as motor drive cabinets or relay panels.
What is the thermal resistance (θJA) of CD4078BPWE4 in TSSOP-14?
The junction-to-ambient thermal resistance (θJA) for CD4078BPWE4 in the PW (TSSOP-14) package is 130°C/W under JEDEC JESD51-7 standard conditions (single-layer board, 1 in² copper pad). With 2 in² of 2-oz copper pour connected to pin 7 (GND) and pin 14 (VDD), θJA improves to approximately 75°C/W - critical for sustained operation near its 125°C maximum junction temperature.
CD4078BPWE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 4000B
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- NOR/OR Gate
- Number of Circuits:
- 1
- Number of Inputs:
- 8
- Schmitt Trigger Input:
- No
- Output Type:
- Single-Ended
- Current - Output High, Low:
- 6.8mA, 6.8mA
- Voltage - Supply:
- 3V ~ 18V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
CD4078BPWE4 FAQ
1.How can I place an order for CD4078BPWE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for CD4078BPWE4 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 CD4078BPWE4 reliable?
The price and inventory of CD4078BPWE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD4078BPWE4 is usually 5 days.
3.What payment methods are accepted for CD4078BPWE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD4078BPWE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD4078BPWE4?
CD4078BPWE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD4078BPWE4 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 CD4078BPWE4?
For technical support, including CD4078BPWE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD4078BPWE4 requirements.
6.How does Aetrix verify that CD4078BPWE4 is sourced from the original manufacturer or authorized distributors?
All CD4078BPWE4 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 CD4078BPWE4 meets industry standards.
7.What is the process for return or replacement of CD4078BPWE4?
All CD4078BPWE4 units undergo pre-shipment inspection (PSI). If there is an issue with CD4078BPWE4, 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 CD4078BPWE4 part is unused and in its original packaging.
Return procedure for CD4078BPWE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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