embedded-processors-controllers

CH552G

Key datasheet specifications and the closest alternatives, ranked by parametric similarity and grounded in the manufacturer datasheet.

01 — Overview

This datasheet covers the CH552 and CH551, enhanced 8-bit USB MCUs compatible with MCS-51. It details architecture, pinouts, and features for system designers. Key parameters include a 24MHz clock speed, 16KB ROM, 1KB xRAM supporting DMA, and dual asynchronous serial ports. The chip integrates a full-speed USB device controller, ADC, touch key detection, three timer groups, and PWM outputs, operating at supply voltages of 3.3V or 5V.

02 — Key specifications

Datasheet parameters

ParameterMinTypMaxConditions
supply voltage range 3 V — 5.5 V
input offset voltage -400 mV — — V
operating temperature -40 °C — 85 °C °C
clock frequency — 24 MHz —
cpu speed — 24 MHz —
program memory size — 16.4 kB —
ram size — 1.28 kB —
io count — 17 —
adc resolution — 8 bit —
core size — 8 bit —
03 — Alternatives

Closest matches to CH552G

ATmega168A 1.3× lower ram size, 1.2× higher adc resolution, 1.2× lower clock frequency
ATmega32A 2.0× higher program memory size, 1.5× lower clock frequency, 1.5× lower cpu speed
ATmega8A 2.0× lower program memory size, 1.5× lower clock frequency, 1.5× lower cpu speed
nuvoton-tech-ms51fb9ae-t-20ccf6ff2ecfc478 1.5× higher adc resolution, 1.4× higher operating temperature, 1.2× lower ram size
ATmega328P 2.0× higher program memory size, 1.9× higher operating temperature, 1.6× higher ram size
ATmega328PB 2.0× higher program memory size, 1.6× higher ram size, 1.4× higher operating temperature
ATtiny1616 9.6× lower clock frequency, 1.6× higher ram size, 1.4× higher operating temperature
EFM8BB21F16A-C-QFN20 2.1× higher cpu speed, 1.9× higher operating temperature, 1.8× higher ram size
04 — FAQ

Frequently asked questions

What is the ADC resolution of the CH552G?

The ADC resolution is 8 bit.

What is the maximum clock frequency of the CH552G?

The maximum clock frequency is 24 MHz.

What is the core size of the CH552G?

The core size is 8 bit.

What is the CPU speed of the CH552G?

The CPU speed is 24 MHz.

What is the input offset voltage?

The input offset voltage is -400 mV at V.

How many I/O pins does the CH552G have?

The CH552G has 17 I/O pins.

What is the operating temperature of the CH552G?

The operating temperature is 85 °C.

What is the program memory size of the CH552G?

The program memory size is 16.4 kB.

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