The HuaXin HST501/R502 manual provides specifications, pin functions and operation details for the remote‑control CMOS chip.
The HST501 and HSR502 are CMOS remote‑control chips that support five independent functions: Forward, Backward, Left, Right and Turbo. They operate over a wide supply voltage range and feature low static current, dual‑channel infrared and wireless encoding, and built‑in RC oscillator.
The manual lists the pin assignments, electrical characteristics, timing parameters and example application circuits. It also includes package information, component values for typical designs and a functional table describing command sequences. This manual is written in Chinese.
| Supply voltage (Vcc) | 2.5‑5.0 V |
|---|---|
| Supply current (Icc) | 100 µA |
| Standby current (Istb) | 5 µA |
| Low‑level input voltage (Vil) | 0.8 V |
| High‑level input voltage (Vih) | 3.0 V |
| Power dissipation (Pd) | 500 mW |
| Operating temperature range (Tamb) | -10 °C to +40 °C |
| Storage temperature range (Tstg) | -25 °C to +85 °C |
It supports Forward, Backward, Left, Right and Turbo commands.
The chip operates from 2.5 V to 5.0 V.
The typical supply current is 100 µA.