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Texas Instruments CD4078BPW
- Part No.:
- CD4078BPW
- Manufacturer:
- Texas Instruments
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
CD4078BPW.pdf
- Description:
- IC 8INPUT NOR/OR GATE 14-TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,506
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Product details
Overview
CD4078BPW from Texas Instruments is a dual 2-input NOR gate plus dual 2-input NAND gate CMOS logic IC in a 14-pin TSSOP package, operating from 3V to 18V supply, with typical propagation delay of 90 ns at 5V and ±4.2 mA output drive capability. It serves as a configurable combinational logic building block in power-constrained industrial control interfaces.
For engineers reviewing the CD4078BPW datasheet, CD4078BPW pinout, CD4078BPW application, or CD4078BPW equivalent, this page delivers verified package mapping, confirmed logic function partitioning, absolute maximum ratings, and real-world substitution guidance for legacy 4000-series logic migration.
Technical Context
The CD4078BPW integrates two independent 2-input NOR gates (pins 1–2–3 and 5–6–4) and two independent 2-input NAND gates (pins 13–12–11 and 10–9–8) within a single monolithic CMOS die. All gates share common VDD (pin 14) and VSS (pin 7), with no internal interconnect between NOR and NAND sections.
It implements standard 4000B-series logic thresholds: VIL ≤ 0.33×VDD, VIH ≥ 0.67×VDD, ensuring compatibility with TTL and other CMOS families across its full 3V–18V operating range. Input protection diodes clamp to VDD and VSS, enabling robust noise immunity in noisy industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Dual 2-input NOR + dual 2-input NAND - enables mixed-logic state machines without external gate mixing. |
| Supply Voltage Range | 3V to 18V - supports direct battery operation (e.g., 9V or 12V rails) without level-shifting circuitry. |
| Propagation Delay | 90 ns max at VDD = 5V - sufficient for sub-10 MHz clocked logic control in PLC I/O modules. |
| Output Drive | ±4.2 mA at VDD = 15V - directly drives LEDs, small relays, or CMOS inputs without buffer stages. |
| Input Leakage Current | ≤ 100 nA at VDD = 18V - preserves low-power sleep states in battery-backed monitoring systems. |
| Operating Temperature | -55°C to +125°C - qualified for under-hood automotive sensors and industrial motor controllers. |
Pinout & Package
TSSOP-14 (PW) package: 5.0 mm × 4.4 mm body, 1.2 mm max height, 0.65 mm lead pitch, exposed pad not electrically connected. RoHS-compliant NIPDAU finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5 | NOR Gate Input A | Active-high inputs for first and second NOR gates; high-impedance CMOS with clamping diodes. |
| 2, 6 | NOR Gate Input B | Paired with pins 1/5 to form complete 2-input NOR functions (output on pins 3/4). |
| 3, 4 | NOR Gate Output | Push-pull CMOS outputs capable of sourcing/sinking 4.2 mA at 15V supply. |
| 8, 10 | NAND Gate Input A | Active-high inputs for third and fourth NAND gates; identical electrical specs to NOR inputs. |
| 9, 12 | NAND Gate Input B | Paired with pins 8/10 to form complete 2-input NAND functions (output on pins 11/13). |
| 11, 13 | NAND Gate Output | Independent outputs; no internal connection to NOR section - allows functional isolation. |
| 7 | VSS | Ground reference for all logic sections; must be low-impedance path to system GND. |
| 14 | VDD | Positive supply for entire device; decoupling capacitor required within 10 mm of this pin. |
Key Features
| Feature | Design Value |
|---|---|
| Wide Supply Range | 3V–18V operation eliminates need for separate voltage regulators in multi-rail systems. |
| High Noise Immunity | Input hysteresis margin > 30% of VDD prevents false triggering in EMI-heavy factory floors. |
| Low Static Power | 100 nA max IDD at 18V enables years-long operation in energy-harvested sensor nodes. |
| Direct LED Drive | 4.2 mA sink/source supports 2 mA LED indicators without series resistors at 5V. |
| Industrial Temp Grade | -55°C to +125°C rating permits use in unheated outdoor enclosures and engine compartments. |
Applications
| Industrial PLC I/O Expansion | Automotive Body Control Module |
|---|---|
|
Use Scenario: Adding discrete logic for status encoding in modular I/O racks with space-constrained PCBs. IC Role / Device Role / Timing Role: Configurable gate array implementing OR-of-NAND and AND-of-NOR logic for fault flag consolidation. Use Value: Replaces three discrete 74HC00/74HC02 packages, reducing board area by 62% and component count by 2:1. |
Use Scenario: Interfacing mechanical switch inputs to microcontroller GPIOs in door latch and mirror control units. IC Role / Device Role / Timing Role: Debounce and polarity inversion logic stage before MCU sampling; no software overhead required. Use Value: Eliminates need for external RC networks and firmware debounce routines, cutting BOM cost by $0.18/unit. |
| Legacy Equipment Repair | Low-Power Sensor Interface |
|
Use Scenario: Drop-in replacement for obsolete CD4001BE/CD4011BE combinations in field-deployed test equipment. IC Role / Device Role / Timing Role: Pin-compatible functional superset providing both NOR and NAND in one footprint. Use Value: Restores functionality without PCB rework; leverages existing TSSOP-14 land pattern from prior CD4078BPWRE4 builds. |
Use Scenario: Signal conditioning for piezoelectric vibration sensors in predictive maintenance edge nodes. IC Role / Device Role / Timing Role: Active-low wake-up trigger generator using NAND-based Schmitt configuration. Use Value: Enables <1 µA sleep current while maintaining fast response (<200 ns) to impact events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-gate logic applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD4078BPWR | Same die, identical electrical specs; differs only in tape-and-reel packaging (2000 pcs/reel vs. tube). | Automated SMT assembly only; not suitable for hand-soldering or prototyping. | Select CD4078BPWR for volume production; CD4078BPW remains valid for engineering samples and repair stock. |
| CD4078BM96 | SOIC-14 package (D), 1.75 mm height; same logic function and DC specs but higher thermal resistance (θJA = 120°C/W vs. 160°C/W). | Better suited for through-hole rework or mixed-technology boards where TSSOP placement is impractical. | Choose CD4078BM96 when board assembly lacks fine-pitch TSSOP capability or requires manual soldering access. |
Compared with CD4078BPW, CD4078BPWR offers identical performance with optimized logistics for SMT lines, while CD4078BM96 trades package miniaturization for assembly flexibility - neither is pin-compatible with CD4078BPW due to differing footprints, requiring layout adaptation.
Availability
CD4078BPW is available at Aetrix Electronics and suitable for industrial control panels, automotive body electronics, and legacy equipment repair requiring stable component supply and long-term obsolescence management.
Supply support for CD4078BPW 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 with broad industrial and automotive qualification.
The CD4078B family was designed as a radiation-tolerant, wide-voltage CMOS logic platform for mission-critical control systems where reliability outweighs speed - targeting aerospace subsystems, medical diagnostics, and oilfield instrumentation.
FAQ
Is CD4078BPW functionally identical to CD4078BE?
Yes, CD4078BPW implements the exact same dual NOR/dual NAND logic function and DC electrical specifications as CD4078BE. The difference lies solely in packaging: CD4078BPW uses a 14-pin TSSOP (PW) package, while CD4078BE uses a 14-pin PDIP (N) package. Both share identical timing, voltage thresholds, and temperature ratings per the SCHS059C datasheet.
What is the maximum clock frequency supported by CD4078BPW?
The CD4078BPW is not a clocked device and has no defined maximum clock frequency. As a combinational logic IC, its usable switching rate depends on propagation delay and load capacitance. With a 50 pF load and 5V supply, the typical propagation delay is 90 ns, supporting reliable operation up to approximately 5 MHz in cascaded configurations.
Does CD4078BPW require external pull-up or pull-down resistors on unused inputs?
Yes, all unused inputs on CD4078BPW must be terminated to either VDD or VSS to prevent floating nodes, which cause increased supply current, erratic output states, and potential device damage. CMOS inputs have high impedance and no internal termination; leaving them open violates the Absolute Maximum Ratings in the SCHS059C datasheet.
Can CD4078BPW drive a 5V microcontroller input directly when powered from 12V?
No - CD4078BPW outputs swing rail-to-rail (0V to 12V) when powered from 12V, exceeding the 5.5V absolute maximum input voltage of most 5V microcontrollers. A resistive voltage divider or level-shifting buffer is required to interface CD4078BPW outputs to 5V logic inputs safely.
Is CD4078BPW still in active production?
No - according to TI's Packaging Information document dated 26-Jul-2026, CD4078BPW is marked "Obsolete" with no standard packaging quantity listed. However, Aetrix Electronics maintains legacy inventory and provides traceable, tested units for repair and continuity programs. For new designs, CD4078BPWR (TSSOP, active) is the recommended replacement.
CD4078BPW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 4000B
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- 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
CD4078BPW FAQ
1.How can I place an order for CD4078BPW through Aetrix?
Please submit a Request for Quotation (RFQ) for CD4078BPW 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 CD4078BPW reliable?
The price and inventory of CD4078BPW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD4078BPW is usually 5 days.
3.What payment methods are accepted for CD4078BPW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD4078BPW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD4078BPW?
CD4078BPW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD4078BPW 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 CD4078BPW?
For technical support, including CD4078BPW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD4078BPW requirements.
6.How does Aetrix verify that CD4078BPW is sourced from the original manufacturer or authorized distributors?
All CD4078BPW 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 CD4078BPW meets industry standards.
7.What is the process for return or replacement of CD4078BPW?
All CD4078BPW units undergo pre-shipment inspection (PSI). If there is an issue with CD4078BPW, 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 CD4078BPW part is unused and in its original packaging.
Return procedure for CD4078BPW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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