44 Modems 27

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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
ST7538Q	STMicroelectronics	MODEM	INDUSTRIAL	GULL WING	44	LQFP	SQUARE	PLASTIC/EPOXY	YES	1	BCDMOS			5 V	5,9	FLATPACK, LOW PROFILE	QFP44,.47SQ,32	Modems	.8 mm	85 Cel	-40 Cel	NICKEL PALLADIUM GOLD	QUAD	.0048 Mbps	S-PQFP-G44	3	1.6 mm	10 mm	Not Qualified		e4	30	260	10 mm
ST7538QTR	STMicroelectronics	MODEM	INDUSTRIAL	GULL WING	44	LQFP	SQUARE	PLASTIC/EPOXY	YES	1	BCDMOS			5 V	5,9	FLATPACK, LOW PROFILE	QFP44,.47SQ,32	Modems	.8 mm	85 Cel	-40 Cel	NICKEL PALLADIUM GOLD	QUAD	.0048 Mbps	S-PQFP-G44	3	1.6 mm	10 mm	Not Qualified		e4	30	260	10 mm
73K312L-IH	Texas Instruments	MODEM	INDUSTRIAL	J BEND	44	QCCJ	SQUARE	PLASTIC/EPOXY	YES	1				5 V		CHIP CARRIER			1.27 mm	85 Cel	-40 Cel		QUAD	.0012 Mbps	S-PQCC-J44		5.08 mm	16.5862 mm	Not Qualified	FULL DUPLEX				16.5862 mm
73K324L-IH	Texas Instruments	MODEM	INDUSTRIAL	J BEND	44	QCCJ	SQUARE	PLASTIC/EPOXY	YES	1				5 V		CHIP CARRIER			1.27 mm	85 Cel	-40 Cel		QUAD	.0024 Mbps	S-PQCC-J44		5.08 mm	16.5862 mm	Not Qualified	FULL DUPLEX				16.5862 mm
73K222U-IH	Texas Instruments	MODEM	INDUSTRIAL	J BEND	44	QCCJ	SQUARE	PLASTIC/EPOXY	YES	1				5 V		CHIP CARRIER			1.27 mm	85 Cel	-40 Cel		QUAD	.0012 Mbps	S-PQCC-J44		5.08 mm	16.5862 mm	Not Qualified					16.5862 mm
AD28MSP01KP	Analog Devices	MODEM-SUPPORT CIRCUIT	COMMERCIAL	J BEND	44	QCCJ	SQUARE	PLASTIC/EPOXY	YES	1			20 mA	5 V	5	CHIP CARRIER	LDCC44,.7SQ	Modems	1.27 mm	70 Cel	0 Cel	TIN LEAD	QUAD		S-PQCC-J44		4.57 mm	16.585 mm	Not Qualified		e0			16.585 mm
AD28MSP01KST	Analog Devices	MODEM-SUPPORT CIRCUIT	COMMERCIAL	GULL WING	44	LQFP	SQUARE	PLASTIC/EPOXY	YES	1			20 mA	5 V	5	FLATPACK, LOW PROFILE	TQFP44,.47SQ,32	Modems	1 mm	70 Cel	0 Cel	TIN LEAD	QUAD		S-PQFP-G44		1.6 mm	14 mm	Not Qualified		e0			14 mm
73K222AU-IH	Analog Devices	MODEM	INDUSTRIAL	J BEND	44	QCCJ	SQUARE	PLASTIC/EPOXY	YES	1	CMOS			5 V		CHIP CARRIER			1.27 mm	85 Cel	-40 Cel		QUAD	.0012 Mbps	S-PQCC-J44		5.08 mm	16.5862 mm	Not Qualified	DATA RATE MIN:300BPS				16.5862 mm
73M2901-IGT/5	Analog Devices	MODEM	INDUSTRIAL	GULL WING	44	LQFP	SQUARE	PLASTIC/EPOXY	YES	1				5 V		FLATPACK, LOW PROFILE			.8 mm	85 Cel	-40 Cel		QUAD	.0024 Mbps	S-PQFP-G44		1.6 mm	10 mm	Not Qualified					10 mm
73M2901C/5V-IGT	Analog Devices	MODEM	INDUSTRIAL	GULL WING	44	QFP	SQUARE	PLASTIC/EPOXY	YES				62 mA	5 V	5	FLATPACK	QFP44,.47SQ,32	Modems	.8 mm	85 Cel	-40 Cel		QUAD		S-PQFP-G44				Not Qualified
STLC7545CFN	STMicroelectronics	MODEM-SUPPORT CIRCUIT	COMMERCIAL	J BEND	44	QCCJ	SQUARE	PLASTIC/EPOXY	YES	1	CMOS			5 V	3.3/5,5	CHIP CARRIER	LDCC44,.7SQ	Modems	1.27 mm	70 Cel	0 Cel	MATTE TIN	QUAD	.0384 Mbps	S-PQCC-J44		4.57 mm	16.5862 mm	Not Qualified		e3			16.5862 mm
ST7543CQFP	STMicroelectronics	MODEM-SUPPORT CIRCUIT	COMMERCIAL	GULL WING	44	LQFP	SQUARE	PLASTIC/EPOXY	YES	1	CMOS		37 mA	5 V	5	FLATPACK, LOW PROFILE	QFP44,.63SQ,40	Modems	1 mm	70 Cel	0 Cel	TIN LEAD	QUAD	.0192 Mbps	S-PQFP-G44		1.6 mm	14 mm	Not Qualified		e0			14 mm
STLC7545CFNTR	STMicroelectronics	MODEM-SUPPORT CIRCUIT	COMMERCIAL	J BEND	44	QCCJ	SQUARE	PLASTIC/EPOXY	YES	1				5 V		CHIP CARRIER			1.27 mm	70 Cel	0 Cel		QUAD	.0384 Mbps	S-PQCC-J44		4.57 mm	16.5862 mm	Not Qualified					16.5862 mm
STLC7545TQFP4YTR	STMicroelectronics	MODEM-SUPPORT CIRCUIT	COMMERCIAL	GULL WING	44	LQFP	SQUARE	PLASTIC/EPOXY	YES	1				5 V		FLATPACK, LOW PROFILE			.8 mm	70 Cel	0 Cel		QUAD	.0384 Mbps	S-PQFP-G44		1.6 mm	10 mm	Not Qualified					10 mm
TS7542CFN	STMicroelectronics	MODEM-SUPPORT CIRCUIT	COMMERCIAL	J BEND	44	QCCJ	SQUARE	PLASTIC/EPOXY	YES	1		-5 V	35 mA	5 V	+-5	CHIP CARRIER	LDCC44,.7SQ	Modems	1.27 mm	70 Cel	0 Cel	TIN LEAD	QUAD	.0096 Mbps	S-PQCC-J44		4.15 mm	16.5862 mm	Not Qualified		e0			16.5862 mm
ST7544CQFP	STMicroelectronics	MODEM-SUPPORT CIRCUIT	COMMERCIAL	GULL WING	44	LQFP	SQUARE	PLASTIC/EPOXY	YES	1	CMOS		37 mA	5 V	5	FLATPACK, LOW PROFILE	QFP44,.63SQ,40	Modems	1 mm	70 Cel	0 Cel	TIN LEAD	QUAD	.0288 Mbps	S-PQFP-G44		1.6 mm	14 mm	Not Qualified		e0			14 mm
ST7543CFN	STMicroelectronics	MODEM-SUPPORT CIRCUIT	COMMERCIAL	J BEND	44	QCCJ	SQUARE	PLASTIC/EPOXY	YES	1	CMOS		37 mA	5 V	5	CHIP CARRIER	LDCC44,.7SQ	Modems	1.27 mm	70 Cel	0 Cel	TIN LEAD	QUAD	.0192 Mbps	S-PQCC-J44		4.57 mm	16.5862 mm	Not Qualified		e0			16.5862 mm
ST7546CQFP	STMicroelectronics		COMMERCIAL	GULL WING	44	QFP	SQUARE	PLASTIC/EPOXY	YES		CMOS				3.3/5,5	FLATPACK	QFP44,.63SQ,40	Modems	1 mm	70 Cel	0 Cel	Tin/Lead (Sn/Pb)	QUAD		S-PQFP-G44				Not Qualified		e0
STLC7546TQFP4Y	STMicroelectronics	MODEM-SUPPORT CIRCUIT	COMMERCIAL	GULL WING	44	LQFP	SQUARE	PLASTIC/EPOXY	YES	1	CMOS			5 V	3.3/5,5	FLATPACK, LOW PROFILE	QFP44,.47SQ,32	Modems	.8 mm	70 Cel	0 Cel	TIN LEAD	QUAD		S-PQFP-G44		1.6 mm	10 mm	Not Qualified		e0			10 mm
STLC7545TQFP4Y	STMicroelectronics	MODEM-SUPPORT CIRCUIT	COMMERCIAL	GULL WING	44	LQFP	SQUARE	PLASTIC/EPOXY	YES	1	CMOS			5 V	3.3/5,5	FLATPACK, LOW PROFILE	QFP44,.47SQ,32	Modems	.8 mm	70 Cel	0 Cel	NICKEL PALLADIUM GOLD	QUAD	.0384 Mbps	S-PQFP-G44		1.6 mm	10 mm	Not Qualified		e4			10 mm
STLC7550TQFP	STMicroelectronics	MODEM-SUPPORT CIRCUIT	COMMERCIAL	GULL WING	44	LQFP	SQUARE	PLASTIC/EPOXY	YES	1	CMOS			3 V	3	FLATPACK, LOW PROFILE	QFP44,.47SQ,32	Modems	.8 mm	70 Cel	0 Cel	TIN LEAD	QUAD	.056 Mbps	S-PQFP-G44		1.6 mm	10 mm	Not Qualified		e0			10 mm
STLC7550	STMicroelectronics	MODEM-SUPPORT CIRCUIT	COMMERCIAL	GULL WING	44	LQFP	SQUARE	PLASTIC/EPOXY	YES	1	CMOS			3 V	3	FLATPACK, LOW PROFILE	QFP44,.47SQ,32	Modems	.8 mm	70 Cel	0 Cel	TIN LEAD	QUAD	.056 Mbps	S-PQFP-G44		1.6 mm	10 mm	Not Qualified		e0			10 mm
ST7544CFN	STMicroelectronics	MODEM-SUPPORT CIRCUIT	COMMERCIAL	J BEND	44	QCCJ	SQUARE	PLASTIC/EPOXY	YES	1	CMOS		37 mA	5 V	5	CHIP CARRIER	LDCC44,.7SQ	Modems	1.27 mm	70 Cel	0 Cel	MATTE TIN	QUAD	.0288 Mbps	S-PQCC-J44		4.57 mm	16.5862 mm	Not Qualified		e3			16.5862 mm
ST7538P	STMicroelectronics	MODEM	INDUSTRIAL	GULL WING	44	LQFP	SQUARE	PLASTIC/EPOXY	YES	1	BCDMOS			5 V	5,9	FLATPACK, LOW PROFILE	QFP44,.47SQ,32	Modems	.8 mm	85 Cel	-40 Cel	NICKEL PALLADIUM GOLD	QUAD	.0048 Mbps	S-PQFP-G44		1.6 mm	10 mm	Not Qualified	HALF DUPLEX	e4			10 mm
SAB82511-N	Infineon Technologies	MODEM	COMMERCIAL	J BEND	44	QCCJ	SQUARE	PLASTIC/EPOXY	YES		BIPOLAR		290 mA	5 V	5	CHIP CARRIER	LDCC44,.7SQ	Modems	1.27 mm	70 Cel	0 Cel	Tin/Lead (Sn/Pb)	QUAD		S-PQCC-J44				Not Qualified		e0
UPD77811L	Renesas Electronics			J BEND	44	QCCJ	SQUARE	PLASTIC/EPOXY	YES		CMOS	-5 V		5 V	+-5	CHIP CARRIER	LDCC44,.7SQ	Modems	1.27 mm			Tin/Lead (Sn/Pb)	QUAD		S-PQCC-J44				Not Qualified		e0
UPD77811LM	Renesas Electronics			J BEND	44	QCCJ	SQUARE	PLASTIC/EPOXY	YES		CMOS	-5 V		5 V	+-5	CHIP CARRIER	LDCC44,.7SQ	Modems	1.27 mm			Tin/Lead (Sn/Pb)	QUAD		S-PQCC-J44				Not Qualified		e0

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.