Texas Instruments CD4511BPWR

Overview

CD4511BPWR from Texas Instruments is a BCD-to-7-segment latch/decoder/driver IC designed for direct LED display control in digital instrumentation and panel meters. It features active-high Latch Enable (LE), active-low Blanking (BL), and Lamp Test (LT) inputs, operates over –55°C to +125°C, supports 3–18 V DC supply, and drives common-cathode 7-segment displays without external current-limiting resistors.

For engineers reviewing the CD4511BPWR datasheet, CD4511BPWR pinout, CD4511BPWR application, or CD4511BPWR equivalent, key selection criteria include its latch-enabled BCD decoding, integrated segment drivers with TTL-compatible inputs, wide supply voltage range, and TSSOP-16 packaging suitable for high-density PCB layouts in industrial and test equipment.

Technical Context

The CD4511BPWR implements a CMOS-based BCD-to-7-segment decoder with internal latching logic that captures and holds input BCD data on the rising edge of LE. Its output drivers are designed for direct connection to common-cathode LED segments, delivering up to 25 mA sink current per segment at V_DD = 15 V.

It integrates three dedicated control functions: BL disables all segment outputs (low-impedance off-state), LT forces all segments on for continuity testing, and LE enables transparent latching-allowing multiplexed display systems when coordinated with external timing circuitry.

Key Specifications

Pinout & Package

TSSOP-16 package (PW suffix), 5.0 mm × 4.4 mm body, 0.65 mm lead pitch, 1.2 mm max height, RoHS-compliant NIPDAU/SN lead finish, MSL Level-1 (260°C peak reflow).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC14511BDR2G and CD4543BE, the CD4511BPWR offers the smallest PCB footprint (TSSOP-16), identical drive strength and temperature rating, and simplified interface for dedicated common-cathode applications-making it optimal for high-density, cost-sensitive industrial instruments.

Availability

CD4511BPWR is available at Aetrix Electronics and suitable for industrial panel meters, digital multimeters, battery-powered test equipment, and automotive diagnostic tools requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for CD4511BPWR 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, specializing in analog, embedded processing, and logic ICs with broad industrial, automotive, and consumer applications.

The CD4511BPWR belongs to TI's CD4000-series CMOS logic family, engineered for high-noise-immunity, wide-supply-operation digital interfacing and display control in harsh industrial environments.

FAQ

What is the maximum supply voltage rating for the CD4511BPWR?

The CD4511BPWR is rated for operation from 3 V to 18 V DC. At 18 V, segment output sink current remains within specification (≥20 mA per segment), and input thresholds maintain TTL compatibility. Exceeding 18 V risks permanent damage to internal gate oxides and is not supported by TI's qualification testing or reliability data for the CD4511BPWR.

Does the CD4511BPWR support common-anode LED displays?

No, the CD4511BPWR is designed exclusively for common-cathode 7-segment LED displays. Its segment outputs (a–g) are active-low open-drain drivers that sink current from the LED anodes. To drive common-anode displays, an external inverter or a different device such as the CD4543BE is required. This limitation is inherent to the CD4511BPWR's internal architecture and cannot be overridden by configuration.

What is the purpose of the Blanking (BI) input on the CD4511BPWR?

The Blanking (BI) input on the CD4511BPWR is an active-low control that forces all segment outputs into a high-impedance off-state, effectively disabling the display without affecting the latched BCD data. This allows for PWM-based brightness control, display blanking during data updates, or synchronization in multiplexed systems - all while preserving the stored digit value in the internal latch of the CD4511BPWR.

Can the CD4511BPWR operate at –55°C?

Yes, the CD4511BPWR is fully specified and qualified for operation from –55°C to +125°C. This extended temperature range is confirmed in TI's official packaging and reliability documentation, and applies to the TSSOP-16 (PW) package variant. The CD4511BPWR maintains correct logic functionality, latch integrity, and segment drive capability across this full range without derating, making it suitable for aerospace, military, and under-hood automotive applications.

Is the CD4511BPWR pin-compatible with the CD4511BE (PDIP-16) version?

Yes, the CD4511BPWR is functionally and electrically pin-compatible with the CD4511BE, sharing identical pin numbering, signal definitions, and logic behavior. However, the physical package differs: CD4511BPWR uses a 16-pin TSSOP with 0.65 mm pitch and 5.0 mm × 4.4 mm body, while CD4511BE uses a 16-pin PDIP with 0.3 inch width and 2.54 mm pitch. PCB layout and soldering processes must be adapted accordingly for the CD4511BPWR.