Key facts
- Brand
- Holtek
- Model
- HT46C22
- Industry
- Industrial
- Documents
- 4
- Languages
- EN
- Last added
- 2012-06-04
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Holtek HT46R22/HT46C22 8‑Bit A/D MCU Datasheet
The HT46R22/HT46C22 microcontroller is a high‑performance 8‑bit RISC device designed for applications such as washing‑machine controllers and other home appliances. It features 19 bidirectional I/O lines, an on‑chip crystal/RC oscillator, a watchdog timer, and a programmable timer/event counter with a 7‑stage prescaler. The device also includes an 8‑channel 9‑bit A/D converter and a PWM output that shares pins with I/O lines.
The MCU provides 2048 × 14‑bit program memory ROM and 64 × 8‑bit data RAM. It is supplied in a 24‑pin SKDIP/SOP package and operates from 2.2 V to 5.5 V (4 MHz) or 4.5 V to 5.5 V (8 MHz). Detailed electrical characteristics, pin assignments, and functional descriptions are provided in the following sections.
Holtek HT46C22 specifications
| Operating voltage (4 MHz) | 2.2 V – 5.5 V |
|---|---|
| Operating voltage (8 MHz) | 4.5 V – 5.5 V |
| Bidirectional I/O lines | 19 |
| Program memory ROM | 2048 × 14 bits |
| Data memory RAM | 64 × 8 bits |
| PWM output | 1‑channel (6+2)/(7+1)-bit, shared with I/O |
| Package | 24‑pin SKDIP/SOP |
| Watchdog timer | Included |
| On‑chip oscillator | Crystal and RC oscillator |
All Holtek HT46C22 documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the operating voltage range for the HT46R22/HT46C22?
The device operates from 2.2 V to 5.5 V at 4 MHz and from 4.5 V to 5.5 V at 8 MHz.
How many bidirectional I/O lines does the HT46R22/HT46C22 provide?
It provides 19 bidirectional I/O lines.