STMicroelectronics M74HC4511RM13TR

Overview

M74HC4511RM13TR from STMicroelectronics is a high-speed CMOS BCD-to-7-segment latch/decoder/driver in TSSOP-16 package, designed to directly drive common-cathode LED displays. It features 23 ns typical propagation delay at 6 V, ±5.2 mA output sink/source capability, 2–6 V operating voltage, active-low lamp test (LT) and blanking (BI) controls, and automatic invalid-code blanking for BCD inputs >9.

For engineers reviewing the M74HC4511RM13TR datasheet, M74HC4511RM13TR pinout, M74HC4511RM13TR application, or M74HC4511RM13TR equivalent, key selection criteria include segment drive strength, latch timing behavior, BI/LT functional priority, and compatibility with legacy 74LS4511-based display interfaces.

Technical Context

The M74HC4511RM13TR integrates latching, decoding, and current-driving functions in a single IC. Its latch enable (LE) input captures BCD data on the rising edge, while BI and LT override all other inputs with unconditional segment control-BI forces all outputs low for brightness modulation or blanking, and LT forces all outputs high for display testing.

It uses silicon gate C2MOS technology for low power (4 µA max ICC at 25°C) and high noise immunity (28% VCC min). Segment outputs a–g are fully buffered with balanced tPLH/tPHL delays and support direct connection to common-cathode LEDs without external current-limiting resistors when used within specified IOH/IOL limits.

Key Specifications

Pinout & Package

TSSOP-16 package (5.0 × 4.4 mm body, 0.65 mm pitch), thermally enhanced for surface-mount LED display applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74HC4511N and CD4511BE, M74HC4511RM13TR offers superior high-speed performance, surface-mount packaging, and tighter noise margins-making it optimal for modern compact LED display subsystems requiring low power and precise timing control.

Availability

M74HC4511RM13TR is available at Aetrix Electronics and suitable for digital panel meters, industrial HMIs, test equipment front panels, and automotive dashboard clusters requiring stable component supply and long-term manufacturability.

Supply support for M74HC4511RM13TR 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in automotive, industrial, and power management solutions.

The M74HC4511 belongs to ST's high-speed CMOS logic family, engineered for reliable interface between microcontrollers and LED-based human-machine interfaces in harsh electrical environments.

FAQ

Can M74HC4511RM13TR drive common-anode LED displays?

No. The M74HC4511RM13TR provides active-HIGH segment outputs optimized for common-cathode LEDs. Driving common-anode displays would require external inverters or PNP transistors, which compromise timing integrity and increase board area. Use dedicated common-anode drivers like the 74HC4543 for such configurations.

What happens when both BI and LT are pulled low simultaneously?

When both BI and LT are low, all segment outputs go HIGH - the lamp test function takes precedence over blanking. This behavior is explicitly defined in the truth table and allows unambiguous display testing even during blanking-enabled operation modes.

Does the latch retain data during power-down?

No. The internal latch is volatile and resets upon VCC removal or drop below 2 V. Data must be reloaded after power restoration. For nonvolatile storage, external EEPROM or microcontroller firmware retention is required - the IC itself has no memory retention capability.

Is the M74HC4511RM13TR RoHS compliant and halogen-free?

Yes. Per STMicroelectronics' official product documentation (Doc ID 12742 Rev 5), the M74HC4511RM13TR is RoHS-compliant and halogen-free, meeting JEDEC JS709B and IEC 61249-2-21 standards for environmentally conscious manufacturing.