XE2420G Overview
In addition to 20 pins, there are specific pins included with the kit.It should not be exceeded that the Operating Temperature is 70C.A minimum Operating Temperature of 0C is required.
XE2420G Features
20 pin count

XE2420G Applications
There are a lot of Cermetek MicroElectronics, Inc
XE2420G Modems ICs & Modules applications.

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

Maximum Data Rate Range (Kbps)	2.4 to 20
Maximum Data Rate	2.4Kbps
Transmission Media Type	Cable
Minimum Operating Supply Voltage	3V
Typical Operating Supply Voltage	3.3V
Maximum Operating Supply Voltage	3.6V
Typical Supply Current (mA)	30
Minimum Operating Temperature (°C)	0
Maximum Operating Temperature (°C)	70
Standard Package Name	SMD
Supplier Package	SMD
Mounting	Surface Mount
Package Height	8.89
Package Length	24.26
Package Width	24.26
PCB changed	20
Operating Temp Range	0C to 70C
Rad Hardened	No
RoHS	Compliant
Main Category	Module
HTS	8517.62.00.90
ECCN (US)	EAR99
Manufacturer	Cermetek Microelectronics
Part Status	Active
Reach Compliance Code	unknown
Pin Count	20
Operating Temperature (Max)	70C
Operating Temperature (Min)	0C
Data Rate	2.4KBPS(Mbps)
Supply Current	30(mA)
RoHS Status	RoHS Compliant