28 Modems 65

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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
ST7546CFN	STMicroelectronics		COMMERCIAL	J BEND	28	QCCJ	SQUARE	PLASTIC/EPOXY	YES		CMOS				3.3/5,5	CHIP CARRIER	LDCC28,.5SQ	Modems	1.27 mm	70 Cel	0 Cel	Tin/Lead (Sn/Pb)	QUAD		S-PQCC-J28				Not Qualified		e0
ST7536CFN	STMicroelectronics	MODEM	COMMERCIAL	J BEND	28	QCCJ	SQUARE	PLASTIC/EPOXY	YES	1		-5 V	35 mA	5 V	+-5	CHIP CARRIER	LDCC28,.5SQ	Modems	1.27 mm	70 Cel	-10 Cel	TIN LEAD	QUAD	.0012 Mbps	S-PQCC-J28		4.57 mm	11.5062 mm	Not Qualified	HALF DUPLEX	e0			11.5062 mm
ST7536CFNTR	STMicroelectronics	MODEM	COMMERCIAL	J BEND	28	QCCJ	SQUARE	PLASTIC/EPOXY	YES	1		-5 V	35 mA	5 V		CHIP CARRIER			1.27 mm	70 Cel	-10 Cel		QUAD	.0012 Mbps	S-PQCC-J28		4.57 mm	11.5062 mm	Not Qualified	HALF DUPLEX				11.5062 mm
STLC7546CFN	STMicroelectronics	MODEM-SUPPORT CIRCUIT	COMMERCIAL	J BEND	28	QCCJ	SQUARE	PLASTIC/EPOXY	YES	1	CMOS			3.3 V	3.3/5,5	CHIP CARRIER	LDCC28,.5SQ	Modems	1.27 mm	70 Cel	0 Cel	MATTE TIN	QUAD		S-PQCC-J28		4.57 mm	11.5062 mm	Not Qualified		e3			11.5062 mm
TS7515CP	STMicroelectronics	MODEM	COMMERCIAL	THROUGH-HOLE	28	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	1		-5 V	30 mA	5 V	+-5	IN-LINE	DIP28,.6	Modems	2.54 mm	70 Cel	0 Cel	TIN LEAD	DUAL	.0012 Mbps	R-PDIP-T28			15.24 mm	Not Qualified		e0			36.83 mm
ST7537	STMicroelectronics	MODEM	COMMERCIAL	J BEND	28	QCCJ	SQUARE	PLASTIC/EPOXY	YES						5,10	CHIP CARRIER	LDCC28,.5SQ	Modems	1.27 mm	70 Cel	0 Cel	Tin/Lead (Sn/Pb)	QUAD		S-PQCC-J28				Not Qualified		e0
TS7514CFNTR	STMicroelectronics	PROGRAMMABLE MODEM	COMMERCIAL	J BEND	28	QCCJ	SQUARE	PLASTIC/EPOXY	YES	1	CMOS	-5 V		5 V		CHIP CARRIER			1.27 mm	70 Cel	0 Cel		QUAD	.0012 Mbps	S-PQCC-J28		4.57 mm	11.5062 mm	Not Qualified					11.5062 mm
MC145745FW	NXP Semiconductors	MODEM	OTHER	GULL WING	28	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	1	CMOS			5 V	3.6	SMALL OUTLINE	SOP28,.4	Modems	1.27 mm	85 Cel	-30 Cel	TIN LEAD	DUAL	.0012 Mbps	R-PDSO-G28		2.65 mm	7.51 mm	Not Qualified	DATA RATE MIN:0.3BPS	e0			17.915 mm
MAX2395ETI	Maxim Integrated	MODEM-MODULATOR	INDUSTRIAL	NO LEAD	28	HVQCCN	SQUARE	UNSPECIFIED	YES	1				2.85 V		CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE			.5 mm	85 Cel	-40 Cel	TIN LEAD	QUAD		S-XQCC-N28	1	.8 mm	5 mm	Not Qualified		e0			5 mm
73K324L-28IHR/F	Maxim Integrated	MODEM	INDUSTRIAL	J BEND	28	QCCJ	SQUARE	PLASTIC/EPOXY	YES	1	CMOS			5 V		CHIP CARRIER			1.27 mm	85 Cel	-40 Cel		QUAD	.0024 Mbps	S-PQCC-J28		4.572 mm	11.54 mm	Not Qualified					11.54 mm
MAX2395EGI	Maxim Integrated	MODEM-MODULATOR	INDUSTRIAL	NO LEAD	28	HVQCCN	SQUARE	UNSPECIFIED	YES	1				2.85 V		CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE			.5 mm	85 Cel	-40 Cel	TIN LEAD	QUAD		S-XQCC-N28	1	.9 mm	5 mm	Not Qualified		e0			5 mm
73K224L-IP	Maxim Integrated	MODEM	INDUSTRIAL	THROUGH-HOLE	28	DIP	RECTANGULAR	PLASTIC/EPOXY	NO		CMOS		25 mA	5 V	5	IN-LINE	DIP28,.6	Modems	2.54 mm	85 Cel	-40 Cel		DUAL		R-PDIP-T28				Not Qualified
73K222AL-IH	Maxim Integrated	MODEM	INDUSTRIAL	J BEND	28	QCCJ	SQUARE	PLASTIC/EPOXY	YES	1	CMOS		.012 mA	5 V	5	CHIP CARRIER	LDCC28,.5SQ	Modems	1.27 mm	85 Cel	-40 Cel		QUAD	.0012 Mbps	S-PQCC-J28		4.572 mm	11.5062 mm	Not Qualified	FULL DUPLEX				11.5062 mm
MAX2395ETI+	Maxim Integrated	MODEM-MODULATOR	INDUSTRIAL	NO LEAD	28	HVQCCN	SQUARE	UNSPECIFIED	YES	1				2.85 V		CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE			.5 mm	85 Cel	-40 Cel	MATTE TIN	QUAD		S-XQCC-N28	1	.8 mm	5 mm	Not Qualified		e3	30	260	5 mm
73K324L-28IH/F	Maxim Integrated	MODEM	INDUSTRIAL	J BEND	28	QCCJ	SQUARE	PLASTIC/EPOXY	YES	1	CMOS			5 V		CHIP CARRIER			1.27 mm	85 Cel	-40 Cel		QUAD	.0024 Mbps	S-PQCC-J28		4.572 mm	11.54 mm	Not Qualified					11.54 mm
73K224L-28IHR/F	Maxim Integrated	MODEM		J BEND	28	QCCJ	SQUARE	PLASTIC/EPOXY	YES	1	CMOS		25 mA	5 V		CHIP CARRIER	LDCC28,.5SQ		1.27 mm	85 Cel	-40 Cel		QUAD	.0024 Mbps	S-PQCC-J28		4.572 mm	11.54 mm						11.54 mm
73K224L-28IH/F	Maxim Integrated	MODEM		J BEND	28	QCCJ	SQUARE	PLASTIC/EPOXY	YES	1	CMOS		25 mA	5 V		CHIP CARRIER	LDCC28,.5SQ		1.27 mm	85 Cel	-40 Cel		QUAD	.0024 Mbps	S-PQCC-J28		4.572 mm	11.54 mm						11.54 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.