Texas Instruments CD4054BPW

Overview

CD4054BPW 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 input storage, and TTL-compatible input thresholds. Operating from 3 V to 18 V, it drives common-anode LED displays without external current-limiting resistors when used with appropriate supply voltage and load conditions.

For engineers reviewing the CD4054BPW datasheet, CD4054BPW pinout, CD4054BPW application, or CD4054BPW equivalent, this device is selected for low-power, high-voltage-tolerant display interface design where latch functionality, segment-level output control, and wide supply range are required.

Technical Context

The CD4054BPW implements a synchronous 4-bit latch followed by a BCD-to-7-segment decoder with open-drain (active-low) outputs. Its internal logic includes Schmitt-trigger inputs for noise immunity and a latch enable (LE) control that allows data capture on rising edge of LE while holding prior state otherwise.

It operates as a direct-drive interface between binary-coded decimal sources and common-anode LED segments, with output sink capability up to 1.5 mA per segment at V_DD = 5 V and up to 6.8 mA at V_DD = 15 V, enabling flexible brightness control via supply voltage scaling.

Key Specifications

Pinout & Package

TSSOP-16 (PW) package: 4.4 mm × 5.0 mm body, 0.65 mm lead pitch, 1.2 mm max height, RoHS-compliant NIPDAU finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CD4056BPW and MC14495P, the CD4054BPW delivers optimal balance of noise-immune inputs, compact TSSOP packaging, and simplified control-ideal for new designs prioritizing reliability and board space over auxiliary test/blanking features.

Availability

CD4054BPW is available at Aetrix Electronics and suitable for industrial panel meters, digital multimeters, appliance control panels, and test equipment counters requiring stable component supply and long-term manufacturability.

Supply support for CD4054BPW 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 solutions with over 90 years of innovation in industrial, automotive, and consumer electronics.

The CD4054BPW belongs to TI's legacy CMOS logic family, designed specifically for robust, low-power digital display interfacing in harsh or resource-constrained environments.

FAQ

What is the maximum recommended supply voltage for CD4054BPW?

The CD4054BPW is rated for operation from 3 V to 18 V DC. While absolute maximum rating is 20 V, continuous operation above 18 V risks parametric shift and reduced reliability. For stable long-term performance in industrial applications, maintain V_DD within 3 V–18 V, with 5 V or 12 V being most common. The CD4054BPW output drive strength scales with V_DD, so higher voltages increase segment current capability.

Does CD4054BPW support common-cathode LED displays?

No, the CD4054BPW does not support common-cathode LED displays. Its segment outputs (a–g) are active-low open-drain, intended for direct connection to common-anode configurations where the anodes are tied to V_DD and cathodes are driven low. To drive common-cathode displays, an external inverter or P-channel driver stage would be required - making CD4054BPW unsuitable without added components.

Is CD4054BPW pin-compatible with CD4056BPW?

Yes, CD4054BPW is pin-compatible with CD4056BPW in the TSSOP-16 (PW) package. Both share identical pin assignments for V_DD, V_SS, D0–D3, LE, and segment outputs a–g. However, CD4056BPW adds dedicated BI (blanking input) and LT (lamp test) pins at positions 14 and 15, which are no-connect (NC) on CD4054BPW. This allows drop-in replacement where BI/LT are unused.

What is the purpose of the latch enable (LE) input on CD4054BPW?

The latch enable (LE) input on CD4054BPW controls data capture timing: a rising edge on LE transfers the current state of D0–D3 into the internal latch, freezing the BCD value for decoding and segment output. While LE is low, outputs remain stable regardless of input changes - preventing display flicker during asynchronous data updates. This makes CD4054BPW ideal for systems where BCD data arrives intermittently or overlaps with display refresh cycles.

Can CD4054BPW drive multiple digits in a multiplexed display?

Yes, CD4054BPW can drive individual digits in a multiplexed 7-segment display, but requires external digit-select logic (e.g., decoder or transistor array) since it lacks built-in digit enable or blanking control. Each CD4054BPW handles one digit; its latch holds the BCD value while the corresponding digit is activated. For multi-digit systems, multiple CD4054BPW devices or time-multiplexed use with shared segment lines and discrete digit drivers is standard practice.