Texas Instruments CD40109BE

Product Summary Texas Instruments CD40109BE Unidirectional Translator IC in 16-DIP Package

The CD40109BE from Texas Instruments is a versatile, high-voltage CMOS quad low-to-high voltage level shifter designed for broad integration within digital logic systems. Housed in a standard 16-pin dual-in-line package (DIP), the device delivers unidirectional translation across four independent circuits. Its primary function is to shift lower-voltage logic signals to higher-level outputs, making it a strategic component for interfacing devices operating on disparate voltage rails within complex board designs.

Circuit Function and Operation CD40109BE

At the core of the CD40109BE are four independent level-shifting channels, each capable of translating a low-voltage digital input (with logical 1 at VCC and logical 0 at VSS) to a higher-voltage output (logical 1 at VDD and logical 0 at VSS). Notably, the circuit architecture removes conventional constraints regarding power supply sequencing: neither VDD nor VCC must be present first, nor is there a mandated order for input signal application. Furthermore, within specified maximum ratings, the device tolerates VCC exceeding VDD, and input signals surpassing either VCC or VDD, which introduces considerable flexibility in power management and logic interfacing. In configurations where VCC is greater than VDD, the CD40109BE performs a high-to-low level translation. Each output further supports independent three-state control, enabling a high-impedance state on demand for advanced bus management and circuit isolation.

Main Attributes and Design Factors CD40109BE

The CD40109BE integrates several professional-grade features appropriate for robust system design:

Up and down level-shifting capability supports both low-to-high and high-to-low conversions.

Independent three-state output enables advanced system architectures requiring bus contention management or subsystem isolation.

Standardized, symmetrical output characteristics provide predictability for timing-sensitive designs.

Noise margins are reliably maintained across a wide range of operating voltages, with 1 V at VCC = 5 V (VDD = 10 V) and 2 V at VCC = 10 V (VDD = 15 V).

Quiescent current is minimal, tested across the full package-temperature range and rated — e.g., at 100 nA (18 V, 25°C), facilitating low-power system requirements.

Meets JEDEC B-series CMOS standards for reliability and interoperability.

Electrical Specifications CD40109BE

Electrical specifications are engineered to cover diverse environments and application demands:

Absolute maximum voltages (relative to VSS): -0.5 V to +20 V.

Output voltage range: -0.5 V to VDD + 0.5 V across all outputs.

Maximum DC input current (any input): ±10 mA.

Power dissipation per package: up to 500 mW for -55°C to +100°C, decreasing linearly to 200 mW at +125°C.

Output transistor dissipation: maximum 100 mW across all package types.

Operating temperature range: -55°C to +125°C; storage: -65°C to +150°C.

Lead solder temperature: up to +265°C for 10 seconds at proximity.

Parametric ratings: defined for 5 V, 10 V, and 15 V supplies, supporting flexible logic interfacing.

Comprehensive static and dynamic electrical characteristic graphs detail sink/source currents, propagation delays, and transition times as functions of load and supply parameters, serving as valuable reference for timing analysis and tolerance engineering.

Package Types and Physical Specifications CD40109BE

The CD40109BE is available in multiple standard package outlines to accommodate varying manufacturing and assembly strategies:

16-lead ceramic dual-in-line (F3A suffix)

16-lead plastic dual-in-line (E suffix)

16-lead small-outline (NSR suffix)

16-lead thin shrink small-outline packages (PW and PWR suffixes)

Each package type includes detailed mechanical specifications and pad layouts aligned to JEDEC and IPC standards, along with guidance for stencil designs to optimize soldering and paste application. Package selection enables design teams to optimize component density, assembly process flow, and reliability for both prototyping and high-volume production.

Suggested Usage Parameters and Reliability Standards CD40109BE

For maximum device reliability, it is essential that system designers select nominal operating conditions within recommended boundaries. This includes maintaining power supplies, input signals, and output voltage swings within specified ranges to prevent overstress and ensure longevity. The device supports extensive temperature range operation and is validated for quiescent current at 20 V supply, adding confidence for harsh thermal environments and high-reliability platforms.

Common Uses and System Integration Options CD40109BE

The CD40109BE is particularly well-suited for applications requiring:

Interfacing subsystems or ICs with distinct logic-level voltages, especially in mixed-signal or multi-domain board architectures.

Isolating logic subsystems with independently regulated power supplies where supply sequencing, drop, or regulation may present design challenges.

Unidirectional or bidirectional bus structures utilizing three-state outputs to control data flow and prevent bus contention.

Integration within automotive, military, and industrial systems as validated by the availability of automotive-qualified (CD40109B-Q1) and military (CD40109B-MIL) versions.

Environmental Ratings and Compliance Information CD40109BE

Compliance with environmental and material standards is a critical procurement consideration. The CD40109BE meets key certifications, including:

RoHS compliance (for current EU RoHS requirements on hazardous substances), with available RoHS Exempt options if application-specific exemptions apply.

Green classification in accordance with JS709B low-halogen standards (≤1000 ppm threshold for Cl, Br, Antimony trioxide).

Moisture Sensitivity Level (MSL) and peak solder temperature ratings following JEDEC classifications, supporting a broad range of assembly processes.

Alternative or Substitute Devices CD40109BE

Engineers evaluating the CD40109BE for new or existing designs should be aware of alternate and qualified versions:

Catalog standard: CD40109B

Automotive grade: CD40109B-Q1 (Q100 qualified for automotive reliability)

Military grade: CD40109B-MIL (QML-certified for defense/military applications)

Selection among these versions depends on project-specific demands for reliability, regulatory compliance, and supplier certification.

Conclusion

: CD40109BE

The CD40109BE from Texas Instruments delivers a compelling combination of high-voltage CMOS level translation, flexible power supply sequencing, robust output control, and packaging versatility, making it an essential choice for engineers and procurement professionals facing the challenges of system integration across multiple voltage domains. With industry-standard environmental compliance and multiple qualified versions for automotive and military applications, the CD40109BE stands out as a reliable solution for straightforward and demanding engineering projects alike.