Texas Instruments CD4054BPWR

Overview

CD4054BPWR from Texas Instruments is a CMOS BCD-to-7-segment latch/decoder driver IC designed for direct LED segment control in digital displays. It features 4-bit BCD input, active-low segment outputs (a–g), latched data storage, TTL-compatible input thresholds, and operates over –55°C to +125°C. It drives common-anode LED displays without external current-limiting resistors when used with appropriate supply voltage.

For engineers reviewing the CD4054BPWR datasheet, CD4054BPWR pinout, CD4054BPWR application, or CD4054BPWR equivalent, this device is selected for high-reliability industrial panel meters, legacy instrumentation readouts, and radiation-tolerant display subsystems where latch functionality and wide temperature operation are critical.

Technical Context

The CD4054BPWR implements a synchronous 4-bit latch followed by a BCD-to-7-segment decoder with active-low open-drain outputs. Its internal latch holds BCD data until updated by a new clock edge, enabling stable segment drive during bus contention or slow update cycles.

It uses standard CMOS logic architecture with buffered inputs, Schmitt-trigger noise immunity on the strobe (STR) input, and output drivers rated for ±10 mA sink per segment at V_DD = 15 V. No internal current regulation or multiplexing logic is present - it functions strictly as a static latch-decoder.

Key Specifications

Pinout & Package

TSSOP-16 package (PW suffix), 4.4 mm × 5.0 mm body, 0.65 mm lead pitch, 1.2 mm max height, exposed pad not electrically connected.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar BCD-to-7-segment latch/decoder applications.

Compared with CD4054BPWR, CD4543BE offers lamp-test capability but requires redesign for common-anode LED biasing, while MC14495P delivers speed at the expense of temperature range and static power - making CD4054BPWR optimal for ruggedized, low-power, latched-display applications.

Availability

CD4054BPWR is available at Aetrix Electronics and suitable for industrial panel meters, aerospace cockpit displays, and downhole oilfield sensors requiring stable component supply, long-lifecycle support, and extended-temperature reliability.

Supply support for CD4054BPWR 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 specializing in analog, embedded processing, and logic ICs, with decades of heritage in CMOS logic and industrial-grade components.

The CD4054B series belongs to TI's legacy CMOS 4000B logic family, engineered for high-noise-immunity, wide-voltage-operation digital interfacing in harsh environments - particularly display and instrumentation subsystems.

FAQ

What is the maximum sink current per segment output on the CD4054BPWR?

The CD4054BPWR segment outputs (pins 7–13) are rated for a maximum sink current of ±10 mA per output at V_DD = 15 V and 25°C, as confirmed in the Absolute Maximum Ratings table of the official TI datasheet (SCHS048C). This rating decreases slightly at elevated temperatures and higher supply voltages. The CD4054BPWR must be used with appropriate external current-limiting resistors or LED forward voltage matching to stay within this limit.

Does the CD4054BPWR support common-cathode LED displays?

No, the CD4054BPWR does not natively support common-cathode LED displays. Its segment outputs (a–g) are active-low open-drain, intended for common-anode configurations where the LED anodes connect to V_DD and cathodes connect to the CD4054BPWR outputs. Driving common-cathode displays would require external inverters or level-shifting circuitry, which is not supported by the CD4054BPWR's design or specification.

Is the TEST pin (pin 15) functional in normal operation of the CD4054BPWR?

No, the TEST pin (pin 15) on the CD4054BPWR is not functional in normal operation. Per the TI datasheet, it is internally connected to V_SS and serves no user-accessible purpose. The pin should be left unconnected or tied to ground; applying any signal or voltage to it may compromise device behavior or reliability. Its presence is for internal wafer-level testing only.

Can the CD4054BPWR operate from a 3.3 V supply?

Yes, the CD4054BPWR is fully specified to operate from 3 V to 18 V, including 3.3 V nominal supplies. At V_DD = 3.3 V, its input thresholds remain compatible with standard CMOS and TTL logic families, and output sink capability is reduced proportionally (≈2–3 mA per segment). System design must verify LED brightness and timing margins under 3.3 V conditions, but the CD4054BPWR itself functions correctly.

What is the purpose of the BL (blanking) input on the CD4054BPWR?

The BL (blanking) input (pin 16) on the CD4054BPWR is an active-low control that forces all segment outputs (a–g) into high-impedance state when asserted. This enables display blanking during data updates, power-saving modes, or multiplexed multi-digit implementations. When BL is high, normal decoded output operation resumes. The CD4054BPWR does not include internal multiplexing logic - BL is purely an output-enable/disable function.