CH2056A ET Overview
Several 22 pins are available for specific applications.
CH2056A ET Features
22 pin count

CH2056A ET Applications
There are a lot of Cermetek MicroElectronics, Inc
CH2056A ET Modems ICs & Modules applications.

Remote controls
Wireless network systems
Satellite communications networks
Ethernet circuitry
Wired telephone
Cordless telephone
Desktop PC
Notebook
Pocket PC
Desktop radio

ECCN (US)	EAR99
HTS	8517.62.00.50
Main Category	Single Chip
Maximum Data Rate Range	56Kbps to 256Kbps
Maximum Data Rate	230.4Kbps
Transmission Media Type	Cable
Minimum Operating Supply Voltage (V)	4.5|3
Typical Operating Supply Voltage (V)	3.3|5
Maximum Operating Supply Voltage (V)	3.6|5.5
Typical Supply Current (mA)	52|62
Minimum Operating Temperature (°C)	-40
Maximum Operating Temperature (°C)	85
Mounting	Through Hole
Package Height	13.21
Package Length	32.26
Package Width	25.65
PCB changed	22
Part Status	Active
Pin Count	22
Power Supply Type	Analog
RoHS Status	RoHS non-compliant