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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 Negative Supply Voltage	Maximum Supply Current	Nominal Supply Voltage	Power Supplies (V)	Package Style (Meter)	Package Equivalence Code	Sub-Category	Terminal Pitch	Maximum Operating Temperature	Minimum Operating Temperature	Terminal Finish	Terminal Position	Data Rate	JESD-30 Code	Moisture Sensitivity Level (MSL)	Maximum Seated Height	Width	Qualification	Additional Features	JESD-609 Code	Maximum Time At Peak Reflow Temperature (s)	Peak Reflow Temperature (C)	Length
DS8500-JND+TR	Analog Devices	MODEM	INDUSTRIAL	NO LEAD	20	QCCN	SQUARE	PLASTIC/EPOXY	YES				.000285 mA		3/3.3	CHIP CARRIER	LCC20,.20SQ,25	Modems	.635 mm	85 Cel	-40 Cel	Matte Tin (Sn) - annealed	QUAD		S-PQCC-N20	1			Not Qualified		e3
DS8500-JND+	Analog Devices	MODEM	INDUSTRIAL	NO LEAD	20	HVQCCN	SQUARE	UNSPECIFIED	YES	1			.000285 mA		3/3.3	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	LCC20,.20SQ,25	Modems	.65 mm	85 Cel	-40 Cel	Matte Tin (Sn) - annealed	QUAD	.0012 Mbps	S-XQCC-N20	1	.8 mm	5 mm	Not Qualified		e3	30	260	5 mm
XB3-C-A2-UT-001	Digi International	MODEM	INDUSTRIAL	THROUGH-HOLE	20		RECTANGULAR	UNSPECIFIED	NO	1						MICROELECTRONIC ASSEMBLY				85 Cel	-40 Cel		UNSPECIFIED	.375 Mbps	R-XXMA-T20					POWER REQUIREMENTS AVAILABLE AT 3.3VDC INPUT POWER		NOT SPECIFIED	NOT SPECIFIED
NL-SW-LTE-QBG96	Nimbus Technology	MODEM	INDUSTRIAL	THROUGH-HOLE	20		RECTANGULAR	UNSPECIFIED	NO	1				3.8 V		MICROELECTRONIC ASSEMBLY				85 Cel	-40 Cel		DUAL	.375 Mbps	R-XDMA-T20		6.858 mm	28.95 mm		TRANSMITTING DATE RATE IS 300KBITPS				33.88 mm
MC145443DW	NXP Semiconductors	MODEM	INDUSTRIAL	GULL WING	20	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	1	CMOS			5 V		SMALL OUTLINE			1.27 mm	85 Cel	-40 Cel		DUAL		R-PDSO-G20		2.65 mm	7.5 mm	Not Qualified					12.8 mm
MM74HC943WM	National Semiconductor	MODEM	INDUSTRIAL	GULL WING	20	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	1	CMOS		10 mA	5 V	5	SMALL OUTLINE	SOP20,.4	Modems	1.27 mm	85 Cel	-40 Cel	TIN LEAD	DUAL	.0003 Mbps	R-PDSO-G20		2.6 mm	7.5 mm	Not Qualified	FULL DUPLEX	e0			12.8 mm
MM74HC942WM/A+	Texas Instruments	MODEM	INDUSTRIAL	GULL WING	20	SOP	RECTANGULAR	PLASTIC/EPOXY	YES		CMOS	-5 V		5 V	+-5	SMALL OUTLINE	SOP20,.4	Modems	1.27 mm	85 Cel	-40 Cel	Tin/Lead (Sn/Pb)	DUAL		R-PDSO-G20						e0
74HC943N	Texas Instruments	MODEM	INDUSTRIAL	THROUGH-HOLE	20	DIP	RECTANGULAR	PLASTIC/EPOXY	NO		CMOS			5 V	5	IN-LINE	DIP20,.3	Modems	2.54 mm	85 Cel	-40 Cel	Tin/Lead (Sn/Pb)	DUAL		R-PDIP-T20				Not Qualified		e0
NE5081N	NXP Semiconductors	MODEM-DEMODULATOR	COMMERCIAL	THROUGH-HOLE	20	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	1			50 mA	5 V		IN-LINE			2.54 mm	70 Cel	0 Cel		DUAL		R-PDIP-T20		4.2 mm	7.62 mm	Not Qualified	HALF DUPLEX; FULL DUPLEX				26.73 mm
NE5050D	NXP Semiconductors	MODEM	COMMERCIAL	GULL WING	20	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	1				12 V		SMALL OUTLINE			1.27 mm	70 Cel	0 Cel		DUAL	.3 Mbps	R-PDSO-G20		2.65 mm	7.5 mm	Not Qualified					12.8 mm
NE5050N	NXP Semiconductors	MODEM	COMMERCIAL	THROUGH-HOLE	20	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	1				12 V		IN-LINE			2.54 mm	70 Cel	0 Cel		DUAL	.3 Mbps	R-PDIP-T20		4.2 mm	7.62 mm	Not Qualified					26.73 mm
NE5050D-T	NXP Semiconductors	MODEM	COMMERCIAL	GULL WING	20	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	1				12 V		SMALL OUTLINE			1.27 mm	70 Cel	0 Cel	NICKEL PALLADIUM GOLD	DUAL	.3 Mbps	R-PDSO-G20		2.65 mm	7.5 mm	Not Qualified		e4			12.8 mm
MC145444DW	NXP Semiconductors	MODEM	COMMERCIAL	GULL WING	20	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	1	CMOS			5 V	5	SMALL OUTLINE	SOP20,.4	Modems	1.27 mm	70 Cel	-20 Cel	TIN LEAD	DUAL	.0003 Mbps	R-PDSO-G20		2.65 mm	7.5 mm	Not Qualified	SIMPLEX; HALF DUPLEX; FULL DUPLEX	e0			12.8 mm
MC145442BDW	NXP Semiconductors	MODEM	INDUSTRIAL	GULL WING	20	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	1	CMOS		10 mA	5 V	5	SMALL OUTLINE	SOP20,.4	Modems	1.27 mm	85 Cel	-40 Cel	Tin/Lead (Sn/Pb)	DUAL	.0003 Mbps	R-PDSO-G20		2.65 mm	7.5 mm	Not Qualified		e0			12.8 mm
MC145444P	NXP Semiconductors	MODEM	COMMERCIAL	THROUGH-HOLE	20	DIP	RECTANGULAR	PLASTIC/EPOXY	NO		CMOS			5 V	5	IN-LINE	DIP20,.3	Modems	2.54 mm	70 Cel	-20 Cel		DUAL		R-PDIP-T20				Not Qualified
MC145443BDW	NXP Semiconductors	MODEM	INDUSTRIAL	GULL WING	20	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	1	CMOS		.01 mA	5 V	5	SMALL OUTLINE	SOP20,.4	Modems	1.27 mm	85 Cel	-40 Cel	Tin/Lead (Sn/Pb)	DUAL	.0003 Mbps	R-PDSO-G20		2.65 mm	7.5 mm	Not Qualified		e0			12.8 mm
MC145443BP	NXP Semiconductors	MODEM	INDUSTRIAL	THROUGH-HOLE	20	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	1	CMOS			5 V		IN-LINE			2.54 mm	85 Cel	-40 Cel		DUAL	.0003 Mbps	R-PDIP-T20		4.57 mm	7.62 mm	Not Qualified					26.415 mm
MC145442BP	NXP Semiconductors	MODEM	INDUSTRIAL	THROUGH-HOLE	20	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	1	CMOS		10 mA	5 V	5	IN-LINE	DIP20,.3	Modems	2.54 mm	85 Cel	-40 Cel	Tin/Lead (Sn/Pb)	DUAL	.0003 Mbps	R-PDIP-T20		4.57 mm	7.62 mm	Not Qualified		e0			26.415 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.