Texas Instruments CD74HC4511M

Overview

CD74HC4511M from Texas Instruments is a BCD-to-7-segment latch/decoder/driver in SOIC-16 package, operating from 2 V to 6 V, sourcing up to 10 mA per output at 6 V, with integrated lamp-test and blanking inputs, used in discrete LED digit displays for instrumentation and industrial control panels.

For engineers reviewing the CD74HC4511M datasheet, CD74HC4511M pinout, CD74HC4511M application, or CD74HC4511M equivalent, this page delivers verified functional modes, timing constraints (e.g., LE pulse width ≥14 ns at 6 V), latch transparency behavior, and real-world display interface design considerations - all specific to the CD74HC4511M variant.

Technical Context

The CD74HC4511M implements a synchronous latch architecture where the LATCH ENABLE (LE) input controls storage of BCD inputs D0–D3; when LE is high, latches capture and hold the code; when LE is low, outputs follow BCD inputs transparently. It features active-low BLANK (BL) and active-low LAMP TEST (LT) inputs that override normal decoding to force full-segment illumination or complete blanking.

All outputs are CMOS-compatible push-pull drivers capable of sourcing 10 mA at 6 V while maintaining VOH ≥5.48 V and VOL ≤0.26 V under load. Input thresholds scale with VCC (VIH = 0.7×VCC min, VIL = 0.3×VCC max), ensuring noise immunity of ≥30% of VCC at 5 V.

Key Specifications

Pinout & Package

CD74HC4511M is supplied in a 16-pin SOIC (D) package with nominal body size 9.90 mm × 3.90 mm and 1.27 mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CD74HCT4511E and SN74LS47N, the CD74HC4511M offers wider supply range (2–6 V), higher output drive (10 mA), and push-pull outputs eliminating external pull-ups - making it optimal for modern mixed-voltage embedded displays.

Availability

CD74HC4511M is available at Aetrix Electronics and suitable for digital panel meters, industrial control displays, and test equipment front panels requiring stable component supply and long-term obsolescence management.

Supply support for CD74HC4511M 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 consumer electronics.

The CD74HC4511M belongs to TI's HC logic family, designed specifically for low-power, high-noise-immunity BCD-driven LED display interfaces in cost-sensitive industrial and instrumentation applications.

FAQ

What is the maximum supply voltage rating for CD74HC4511M?

The CD74HC4511M has an absolute maximum VCC rating of 7 V, but its recommended operating range is 2 V to 6 V. Operation above 6 V risks exceeding electrical characteristics limits and may cause premature wear. The CD74HC4511M is specified for reliable performance up to 6 V with guaranteed VOH ≥5.48 V and VOL ≤0.26 V at full output load.

Does CD74HC4511M support common-cathode LED displays?

No, the CD74HC4511M is designed exclusively for common-anode 7-segment displays, as all segment outputs (a–g) are sourcing drivers that pull high to illuminate segments. It cannot directly drive common-cathode displays, which require sinking outputs. Using CD74HC4511M with common-cathode LEDs would require external PNP transistors or level-shifting circuitry.

How does the latch-enable (LE) input affect CD74HC4511M behavior?

When LE is high, the CD74HC4511M latches and holds the current BCD input (D0–D3); outputs remain stable regardless of subsequent BCD changes. When LE is low, the CD74HC4511M enters transparent mode - segment outputs immediately reflect changes on D0–D3. This dual-mode operation enables both static display holding and dynamic multiplexed updating in the same design.

Can CD74HC4511M drive multiple 7-segment digits simultaneously?

Yes, the CD74HC4511M can drive one full 7-segment digit (a–g) plus decimal point (not internally supported - requires external logic). For multi-digit displays, multiple CD74HC4511M devices are used in parallel, coordinated via shared BL and LT signals and individual LE lines. Its 10 mA per output supports standard 10–20 mA LED segments at 5 V with appropriate current-limiting resistors.

Is CD74HC4511M pin-compatible with CD74HCT4511 variants?

Yes, CD74HC4511M is pin-compatible with CD74HCT4511E and CD74HCT4511M in the same SOIC-16 (D) package. Both share identical pinout, footprint, and function mapping. However, they differ in supply range (HC: 2–6 V; HCT: 4.5–5.5 V) and input compatibility (HC: CMOS thresholds; HCT: TTL thresholds), so voltage and logic family matching must be verified before substitution.