The HCMS-29xx series are high performance, easy to use dot matrix displays driven by on-board CMOS ICs. Each display can be directly interfaced with a microprocessor, thus eliminating the need for cumbersome interface components. The serial IC interface allows higher character count information displays with a minimum of data lines. A variety of colors, font heights, and character counts give designers a wide range of choices to meet the needs of various applications.
The HCMS-29xx family is a high‑performance, CMOS‑driven 5 × 7 alphanumeric display series. Each IC drives four characters and can be stacked in X‑ and Y‑directions, allowing 4‑, 8‑, or 16‑character configurations. The displays interface directly with microprocessors via a serial interface, eliminating the need for external driver circuitry.
Key data include recommended supply voltages (VLOGIC 3.0‑5.5 V, VLED 4.0‑5.5 V), operating temperature range –40 °C to +85 °C, and power dissipation up to 1.2 W for a 4‑character module. Detailed pin‑out tables, timing diagrams, and thermal considerations are provided to aid designers in integrating the displays into telecommunications, medical, industrial, and consumer equipment.
| Character Height (0.15") | 4, 8, and 16‑character packages |
|---|---|
| Character Height (0.20") | 4 and 8‑character packages |
| Logic Supply Voltage (VLOGIC) | 3.0 V – 5.5 V |
| LED Supply Voltage (VLED) | 4.0 V – 5.5 V |
| Power Dissipation (4‑character module) | 1.2 W |
| Luminous Intensity (Red, HCMS‑29X5) | 95 µcd typical |
The recommended VLOGIC range is 3.0 V to 5.5 V.
Each IC drives four characters; an 8‑character display uses two cascaded ICs, and a 16‑character display consists of two independent 8‑character sections.
The Reset pin sets all control‑register bits to logic low and places the display in sleep mode, while the Dot Register contents remain unchanged.