Texas Instruments CD74HC4511PWRG4

Overview

CD74HC4511PWRG4 from Texas Instruments is a CMOS BCD-to-7-segment latch/decoder/driver in 16-pin TSSOP package, operating from 2 V to 6 V. It features input latching, active-low blanking (BL), lamp-test (LT), and latch-enable (LE) control - enabling direct drive of common-cathode LED displays in digital instrumentation and embedded panel interfaces.

For engineers reviewing the CD74HC4511PWRG4 datasheet, CD74HC4511PWRG4 pinout, CD74HC4511PWRG4 application, or CD74HC4511PWRG4 equivalent, key selection criteria include its 6-V tolerant BCD input latching, 10-mA sourcing capability at 6 V, TTL-compatible logic thresholds, and verified operation across –55°C to 125°C industrial temperature range.

Technical Context

The CD74HC4511PWRG4 implements a synchronous latch/decoder architecture: when LE is high, D0–D3 inputs are stored in internal latches; when LE is low, outputs track inputs transparently. Its output stage uses standard-size CMOS transistors optimized for segment current sourcing without external drivers.

It supports two distinct functional modes via BL and LT pins: BL = low blanks all segments regardless of BCD input; LT = low forces all seven segments high for uniform lamp test. Propagation delays are balanced across segments (tpd ≤ 64 ns at 6 V, CL = 50 pF), ensuring consistent digit rendering timing.

Key Specifications

Pinout & Package

TSSOP-16 (PW) package: 5.00 mm × 4.40 mm body, 0.65 mm pitch, exposed pad optional, 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 driver applications.

Compared with CD74HC4511PWRE4, CD74HC4511PWRG4 offers identical electrical performance but updated RoHS-compliant marking and traceability; versus SN74LS47N, it delivers latching, sourcing drive, and wide-voltage operation - enabling simpler, lower-power, and more flexible display subsystems.

Availability

CD74HC4511PWRG4 is available at Aetrix Electronics and suitable for industrial control panels, test instrumentation front ends, and automotive dashboard displays requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for CD74HC4511PWRG4 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 over 90 years of innovation in industrial, automotive, and communications markets.

The CD74HC4511PWRG4 belongs to TI's legacy HC logic family - designed specifically for reliable, low-power BCD-driven LED display interfaces in harsh environments where latch control, lamp testing, and wide supply tolerance are mandatory.

FAQ

What is the maximum supply voltage rating for CD74HC4511PWRG4?

The CD74HC4511PWRG4 has an absolute maximum VCC rating of 7 V, but its recommended operating range is 2 V to 6 V. Operation at 6 V enables full 10-mA segment sourcing capability and meets all AC/DC specifications in the datasheet. Exceeding 6 V risks accelerated parametric drift and reduced long-term reliability, even if within absolute limits.

Does CD74HC4511PWRG4 support common-anode LED displays?

No, CD74HC4511PWRG4 is designed exclusively for common-cathode LED displays: its segment outputs (a–g) source current to drive the anodes, while cathodes connect to GND. To drive common-anode displays, an external inverting buffer or PNP transistor array would be required - adding complexity, cost, and propagation delay not present in the native CD74HC4511PWRG4 architecture.

How does the latch-enable (LE) function work in CD74HC4511PWRG4?

In CD74HC4511PWRG4, LE is an active-high control: when LE = high, the internal latches capture and hold the D0–D3 BCD inputs; when LE = low, outputs follow inputs transparently. This allows precise timing control - for example, updating BCD data while blanking the display, then pulsing LE high to commit the new digit without visual artifacts.

Can CD74HC4511PWRG4 drive multiple digits in a multiplexed display?

Yes, CD74HC4511PWRG4 supports multiplexed operation via its BL (blanking) and RBO (ripple blank output) pins. BL can blank individual digits under MCU control, while RBO propagates blanking to downstream CD74HC4511PWRG4 devices - enabling synchronized blanking across multi-digit displays without additional logic gates or timing firmware overhead.

What is the purpose of the lamp-test (LT) pin on CD74HC4511PWRG4?

The LT pin on CD74HC4511PWRG4 is active-low and forces all seven segment outputs (a–g) high simultaneously, regardless of BCD input or latch state. This provides hardware-level verification of LED continuity and driver integrity - essential for production test, field diagnostics, and safety-critical display validation without relying on microcontroller code execution.