NXP Semiconductors 74HCT4511N,652

Overview

74HCT4511N,652 from Nexperia is a TTL-level-compatible BCD-to-7-segment latch/decoder/driver IC in SO16 package, providing 10 mA per output drive capability, active-low latch enable (LE), lamp test (LT), and ripple blanking (BI) functions for direct interface to common-cathode LED displays in industrial panel meters and digital readouts.

For engineers reviewing the 74HCT4511N,652 datasheet, 74HCT4511N,652 pinout, 74HCT4511N,652 application, or 74HCT4511N,652 equivalent, key selection criteria include TTL input compatibility (VIH = 2.0 V min at VCC = 4.5–5.5 V), guaranteed 10 mA segment drive, latch storage for stable display hold, and operation across -40 °C to +125 °C.

Technical Context

The 74HCT4511N,652 integrates four BCD address inputs (A–D), a latch enable (LE), lamp test (LT), and ripple blanking (BI) into a single CMOS logic block with TTL-compatible input thresholds. Its internal architecture includes latches on all four BCD inputs, independent decoder logic, and seven buffered segment drivers (a–g) optimized for driving common-cathode LEDs.

Operation is defined by three control modes: LT LOW forces all segments HIGH (lamp test); BI LOW forces all segments LOW (blanking); LE LOW enables real-time decoding of A–D, while LE HIGH latches and holds the last valid BCD code. Inputs feature integrated clamp diodes enabling safe interfacing to voltages exceeding VCC when used with current-limiting resistors.

Key Specifications

Pinout & Package

74HCT4511N,652 is housed in a plastic small outline package (SO16), SOT109-1, with 16 leads and 3.9 mm body width. Pin 1 index is marked by a notch or dot; device is lead-free and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC4511D,652, the 74HCT4511N,652 offers native TTL input compatibility and simplified 5 V system integration, while SN74LS47N provides cost-effective common-anode support but sacrifices latching, blanking, and modern ESD robustness.

Availability

74HCT4511N,652 is available at Aetrix Electronics and suitable for industrial panel meters, process controllers, test equipment, and embedded status indicators requiring stable component supply across extended temperature ranges.

Supply support for 74HCT4511N,652 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

Nexperia is a global semiconductor expert focused on essential efficiency technologies, delivering high-performance, reliable, and scalable components for automotive, industrial, and consumer markets.

The 74HCT4511N,652 belongs to Nexperia's 74HCT logic family, engineered for seamless interoperability with legacy TTL systems while delivering CMOS power efficiency and robustness for industrial display interfaces.

FAQ

What is the maximum supply voltage rating for the 74HCT4511N,652?

The absolute maximum supply voltage (VCC) for the 74HCT4511N,652 is +7.0 V, but the recommended operating range is strictly 4.5 V to 5.5 V. Operating above 5.5 V risks violating input/output voltage limits and may cause accelerated aging or latch-up. Always use a 100 nF ceramic decoupling capacitor between VCC (pin 16) and GND (pin 8) close to the package.

Can the 74HCT4511N,652 drive common-anode LED displays?

No, the 74HCT4511N,652 is designed exclusively for common-cathode LED displays - its segment outputs (a–g) are active-HIGH sinking drivers. Driving a common-anode display would require external inverters or PNP transistors. For common-anode applications, consider alternatives like SN74LS47N, though it lacks latching and lamp test features present in the 74HCT4511N,652.

How does the ripple blanking (BI) input function in multi-digit displays?

In cascaded multi-digit setups, the BI output of a more-significant digit drives the BI input of the next-lower digit. When the higher digit shows zero and its decoder output would otherwise activate segments, BI asserts LOW to blank the lower digit - enabling automatic leading-zero suppression. The 74HCT4511N,652's BI is active LOW and does not affect internal latching, allowing independent digit control.

What is the minimum pulse width required on the latch enable (LE) input?

The minimum LE pulse width for reliable latching in the 74HCT4511N,652 is 16 ns at VCC = 4.5 V (20 ns max over full temperature range). This ensures setup and hold time margins for the internal latch clock. In practice, a 100 ns–1 µs GPIO pulse from an MCU is more than sufficient. Avoid contact bounce or slow-rising edges - use a Schmitt-trigger buffer if LE is driven by mechanical switches.

Does the 74HCT4511N,652 support operation at -40 °C?

Yes, the 74HCT4511N,652 is fully specified and tested for operation from -40 °C to +125 °C. All key parameters - including propagation delay (≤90 ns max), output drive (≥7.5 mA at VCC = 4.5 V), and input thresholds - are guaranteed across this extended industrial temperature range. No derating is required below -40 °C, and the SO16 package maintains mechanical integrity under thermal cycling.