Key facts
- Brand
- EMC
- Model
- EM78P458
- Category
- Other Electronics
- Industry
- Electronics
- Documents
- 2
- Languages
- ZH
- Last added
- 2012-01-25
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EMC EM78P458/459 OTP ROM Datasheet
The EM78P458 and EM78P459 are low‑power 8‑bit microcontrollers fabricated with a high‑speed CMOS process. They integrate a 4 K × 13‑bit one‑time‑programmable ROM, 84 × 8‑bit SRAM, two bidirectional I/O ports, an 8‑level stack, a real‑time timer/counter, an 8‑bit ADC and two PWM generators.
The document provides detailed pin assignments, functional block diagrams, register maps, and electrical specifications such as operating voltage, temperature ranges, current consumption, and recommended crystal/ceramic resonator values. Package options include 20‑pin DIP/SOP and 24‑pin skinny‑DIP/SOP variants. This manual is written in Chinese.
EMC EM78P458 specifications
| Operating voltage range | 2.3 V ~ 5.5 V |
|---|---|
| Operating temperature range (civilian) | 0 °C ~ 70 °C |
| Operating temperature range (industrial) | -40 °C ~ 85 °C |
| Internal OTP ROM size | 4 K × 13 bits |
| Internal SRAM size | 84 × 8 bits |
| Number of I/O ports | 2 bidirectional ports |
| Timer/Counter (TCC) resolution | 8 bits |
| ADC resolution | 8 bits |
| PWM resolution | 10 bits |
| Typical supply current @3 V/32 kHz | 15 µA |
| Sleep mode current | 1 µA |
All EMC EM78P458 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the operating voltage range of the EM78P458/459?
The device operates from 2.3 V to 5.5 V.
How many I/O ports does the EM78P458/459 provide?
It provides two bidirectional I/O ports.
What is the operating voltage range of the EM78P458/459?
The device operates from 2.3 V up to 5.5 V.
How much current does the EM78P458/459 draw in active mode?
It consumes about 1.5 mA when running at 5 V and 4 MHz.