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Part	Manufacturer	Telecom IC Type	Temperature Grade	Terminal Form	No. of Terminals	Package Code	Package Shape	Package Body Material	Surface Mount	No. of Functions	Technology	Nominal Supply Voltage	Power Supplies (V)	Package Style (Meter)	Package Equivalence Code	Sub-Category	Terminal Pitch	Maximum Operating Temperature	Fax Rate	Minimum Operating Temperature	Terminal Finish	Terminal Position	Data Rate	JESD-30 Code	Maximum Seated Height	Width	Qualification	Additional Features	JESD-609 Code	Length
ADSP-21MOD870-110	Analog Devices	MODEM		GULL WING	100	LFQFP	SQUARE	PLASTIC/EPOXY	YES	1		3.3 V		FLATPACK, LOW PROFILE, FINE PITCH			.5 mm		8 kbps		TIN LEAD	QUAD	.056 Mbps	S-PQFP-G100	1.6 mm	14 mm	Not Qualified		e0	14 mm
ADSP-21MOD870-100	Analog Devices	MODEM		GULL WING	100	LFQFP	SQUARE	PLASTIC/EPOXY	YES	1		3.3 V		FLATPACK, LOW PROFILE, FINE PITCH			.5 mm		8 kbps		TIN LEAD	QUAD	.056 Mbps	S-PQFP-G100	1.6 mm	14 mm	Not Qualified		e0	14 mm
ADSP-21MOD870-000	Analog Devices	MODEM	COMMERCIAL	GULL WING	100	LFQFP	SQUARE	PLASTIC/EPOXY	YES	1	CMOS	3.3 V	3.3	FLATPACK, LOW PROFILE, FINE PITCH	QFP100,.63SQ,20	Modems	.5 mm	70 Cel		0 Cel	TIN LEAD	QUAD	.056 Mbps	S-PQFP-G100	1.6 mm	14 mm	Not Qualified		e0	14 mm
KS16117	Samsung	MODEM-DATA/FAX	COMMERCIAL	GULL WING	100	QFP	RECTANGULAR	PLASTIC/EPOXY	YES	1	CMOS	5 V	5	FLATPACK	QFP100,.63X.87	Modems	.65 mm	70 Cel		0 Cel	TIN LEAD	QUAD	.0144 Mbps	R-PQFP-G100	3 mm	14 mm	Not Qualified		e0	20 mm
S5N8951X01	Samsung	MODEM-SUPPORT CIRCUIT	INDUSTRIAL	GULL WING	100	QFP	RECTANGULAR	PLASTIC/EPOXY	YES	1	CMOS	3.3 V	3.3	FLATPACK	QFP100,.7X.9	Modems	.65 mm	85 Cel		-40 Cel		QUAD		R-PQFP-G100	3 mm	14 mm	Not Qualified			20 mm
KS16116	Samsung	MODEM-DATA/FAX	COMMERCIAL	GULL WING	100	QFP	RECTANGULAR	PLASTIC/EPOXY	YES	1	CMOS	5 V	5	FLATPACK	QFP100,.63X.87	Modems	.65 mm	70 Cel		0 Cel	TIN LEAD	QUAD	.0096 Mbps	R-PQFP-G100	3 mm	14 mm	Not Qualified	DATA RATE MIN:7.2KBPS	e0	20 mm

Modems

A modem, short for modulator-demodulator, is a device used to convert digital signals into analog signals for transmission over telephone lines or other analog communication channels. Modems can also receive and decode analog signals and convert them back into digital signals. They are used to provide internet connectivity, transmit data over long distances, and connect to remote devices.

Modems use a technique called modulation to convert digital signals into analog signals that can be transmitted over an analog communication channel. This involves changing the amplitude, frequency, or phase of the signal in response to the digital data being transmitted. At the receiving end, the modem uses a technique called demodulation to convert the analog signal back into a digital signal that can be processed by the receiving device.

Modems also use various modulation and demodulation techniques to ensure reliable and efficient transmission of data. These techniques include phase-shift keying (PSK), quadrature amplitude modulation (QAM), and frequency-shift keying (FSK), among others. The choice of modulation technique depends on the specific application and the characteristics of the communication channel being used.

There are several types of modems, including dial-up modems, cable modems, DSL modems, and wireless modems. Dial-up modems are the oldest type of modem and use the telephone network to transmit data at relatively slow speeds. Cable modems and DSL modems are used to provide high-speed internet connectivity over cable and phone lines, respectively. Wireless modems, also known as cellular modems, use wireless communication protocols to provide internet connectivity over cellular networks.

Modems are an essential technology for modern communication systems, enabling the transmission of data over a variety of communication channels and protocols. As the technology continues to evolve, we can expect to see even more advanced and innovative modems in the future.