Texas Instruments CD4054BNSRE4

Overview

CD4054BNSRE4 from Texas Instruments is a CMOS BCD-to-7-segment latch/decoder driver IC designed for direct LED segment control in digital displays. It accepts 4-bit BCD input, latches data, decodes to seven active-low segment outputs (a–g), and features blanking and phase control inputs for multiplexed display systems. Operates over −55°C to +125°C with supply voltage range 3 V to 18 V.

For engineers reviewing the CD4054BNSRE4 datasheet, CD4054BNSRE4 pinout, CD4054BNSRE4 application, or CD4054BNSRE4 equivalent, this device is selected for low-power, high-voltage-tolerant LED driving in industrial panel meters, test equipment readouts, and legacy instrumentation where TTL-compatible logic levels and wide V_DD margin are required.

Technical Context

The CD4054BNSRE4 implements synchronous latching followed by static decoding - input data is captured on the rising edge of the LATCH ENABLE signal, then decoded into segment drive signals without internal clocking or timing dependencies. Its outputs are open-drain compatible with common-anode LED configurations and support direct connection to LEDs via external current-limiting resistors.

It includes dedicated BLANK and PHASE inputs: BLANK forces all segment outputs high (off), while PHASE toggles polarity for dynamic multiplexing across dual-digit displays. No internal current regulation or built-in segment current limiting is provided - design responsibility lies with external resistor selection per segment.

Key Specifications

Pinout & Package

CD4054BNSRE4 is supplied in a 16-pin TSSOP package (PW suffix), 4.4 mm × 5.0 mm body, 1.2 mm max height, 0.65 mm lead pitch, 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 CD4054BNSRE4, CD4511BE offers integrated diagnostics but requires different LED topology and lacks multiplexing control, while MC14495P reduces part count in static displays but shifts latching responsibility to the host controller - making CD4054BNSRE4 optimal for deterministic, low-software-overhead multiplexed systems.

Availability

CD4054BNSRE4 is available at Aetrix Electronics and suitable for industrial panel meters, test equipment readouts, and legacy instrumentation interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for CD4054BNSRE4 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, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.

The CD4000-series CMOS logic family, including CD4054BNSRE4, was engineered for high-voltage tolerance, low-power operation, and robust performance in harsh environments - targeting instrumentation, control panels, and military-grade display subsystems.

FAQ

What is the function of the PHASE input on the CD4054BNSRE4?

The PHASE input on the CD4054BNSRE4 is an active-high control signal used to toggle the polarity of segment outputs for time-multiplexed dual-digit displays. When asserted, it inverts the effective drive state of segments a–g, enabling alternating digit activation using shared segment lines - a key feature distinguishing CD4054BNSRE4 from basic decoders like CD4511BE. This capability is integral to the CD4054BNSRE4's role in compact multiplexed display systems.

Does the CD4054BNSRE4 include internal current limiting for LED segments?

No, the CD4054BNSRE4 does not include internal current limiting. Its segment outputs are active-low open-drain drivers requiring external current-limiting resistors connected between V_DD and each segment output. The value of each resistor must be selected based on the target LED forward voltage, desired segment current, and applied V_DD - typically 5–20 mA per segment depending on brightness and supply voltage. This design choice preserves flexibility and thermal efficiency in the CD4054BNSRE4.

Can the CD4054BNSRE4 operate from a 3.3 V supply?

Yes, the CD4054BNSRE4 is fully specified to operate from 3 V to 18 V, including 3.3 V nominal supplies. At 3.3 V, its outputs maintain valid logic thresholds and sufficient drive strength for low-current LED segments or interface with subsequent buffer stages. However, segment brightness will be reduced compared to higher supply voltages unless external boost circuitry or low-V_F LEDs are used - a trade-off explicitly supported by the CD4054BNSRE4's wide V_DD specification.

Is the CD4054BNSRE4 pin-compatible with older CD4054B variants in PDIP or CDIP packages?

Yes, the CD4054BNSRE4 shares identical pinout and electrical functionality with other CD4054B variants including CD4054BE (PDIP) and CD4054BF3A (CDIP). All versions implement the same BCD-to-7-segment latch/decoder logic, identical input/output behavior, and matching signal assignments across all 16 pins - confirming functional and mechanical interchangeability within the CD4054B family despite differing package types. This uniformity is a core design attribute of the CD4054BNSRE4.

What happens to segment outputs when the BLANK input is asserted on the CD4054BNSRE4?

When the BLANK input is driven high on the CD4054BNSRE4, all seven segment outputs (a–g) are forced into a high-impedance inactive state - effectively turning off all connected LEDs regardless of latch content or BCD input. This action is immediate and asynchronous, overriding all other control signals including LATCH ENABLE and PHASE. BLANK provides hardware-level display suppression essential for flicker-free transitions and power-saving modes in systems using the CD4054BNSRE4.