74HC/HCT4511 BCD to 7-segment latch/decoder/driver is a high-speed Si-gate CMOS devices from Philips Semiconductors, with four address inputs (D1 to D4), an active LOW latch enable input (LE), an active LOW ripple blanking input (BI), an active LOW lamp test input (LT), and seven active HIGH segment outputs (Qa to Qg)
The 74HC/HCT4511 is a high‑speed Si‑gate CMOS device that converts BCD inputs to seven‑segment display outputs. It features four BCD address inputs (D1‑D4), an active‑LOW latch enable (LE), ripple‑blanking (BI) and lamp‑test (LT) inputs, and can drive common‑cathode LED displays with up to 10 mA per segment. The device is pin‑compatible with the classic 4511 from the 4000B series and complies with JEDEC standard 7A.
Electrical characteristics include typical propagation delays of 24 ns (Dn to Qh) and 23 ns (LE to Qg), an input capacitance of 3.5 pF, and operation over a temperature range of –40 °C to +125 °C. Application diagrams illustrate connections to common‑cathode and common‑anode LED displays, as well as incandescent, fluorescent, gas‑discharge, and LCD displays. Package outlines and ordering information are provided in the accompanying family documents.
| Guaranteed drive capability per output | 10 mA |
|---|---|
| Typical output high voltage (V_OH) at VCC=5 V | 3.84 V |
| Operating temperature range | -40 °C to +125 °C |
LT is the lamp‑test input; when it is LOW, all segment outputs go HIGH regardless of other inputs.
Each segment output can source up to 10 mA continuously.