COMMERCIAL Parallel I/O Ports 1,956

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Part	Manufacturer	Peripheral IC Type	Temperature Grade	Terminal Form	No. of Terminals	Package Code	Package Shape	Package Body Material	Surface Mount	Maximum Supply Voltage	No. of Bits	Power Supplies (V)	Package Style (Meter)	Package Equivalence Code	Minimum Supply Voltage	Maximum Operating Temperature	CPU Family	Minimum Operating Temperature	Terminal Finish	Ultraviolet Erasable	Terminal Position	No. of Ports	Maximum Seated Height	Width	Additional Features	External Data Bus Width	Maximum Clock Frequency	Maximum Time At Peak Reflow Temperature (s)	Peak Reflow Temperature (C)	Length	ROM Bits Size	No. of Timers	Technology	Maximum Supply Current	Nominal Supply Voltage	Memory Organization	Sub-Category	Terminal Pitch	JESD-30 Code	Moisture Sensitivity Level (MSL)	Qualification	JESD-609 Code	Maximum Standby Current	No. of I/O Lines	Maximum Access Time
CS82C55AZ96	Renesas Electronics	PARALLEL IO PORT, GENERAL PURPOSE	COMMERCIAL	J BEND	44	QCCJ	SQUARE	PLASTIC/EPOXY	YES	5.5 V			CHIP CARRIER		4.5 V	70 Cel		0 Cel	MATTE TIN		QUAD	3	4.57 mm	16.585 mm				30	260	16.585 mm			CMOS		5 V			1.27 mm	S-PQCC-J44	3	Not Qualified	e3		24
CS82C55AZ	Renesas Electronics	PARALLEL IO PORT, GENERAL PURPOSE	COMMERCIAL	J BEND	44	QCCJ	SQUARE	PLASTIC/EPOXY	YES	5.5 V			CHIP CARRIER		4.5 V	70 Cel		0 Cel	MATTE TIN		QUAD	3	4.57 mm	16.585 mm				30	260	16.585 mm			CMOS		5 V			1.27 mm	S-PQCC-J44	3	Not Qualified	e3		24
CP82C55A-5Z	Renesas Electronics	PARALLEL IO PORT, GENERAL PURPOSE	COMMERCIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	5.5 V			IN-LINE		4.5 V	70 Cel		0 Cel	MATTE TIN		DUAL	3	6.35 mm	15.24 mm						51.75 mm			CMOS		5 V			2.54 mm	R-PDIP-T40		Not Qualified	e3		24
CP82C55AZ	Renesas Electronics	PARALLEL IO PORT, GENERAL PURPOSE	COMMERCIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	5.5 V			IN-LINE		4.5 V	70 Cel		0 Cel	MATTE TIN		DUAL	3	6.35 mm	15.24 mm						51.75 mm			CMOS		5 V			2.54 mm	R-PDIP-T40		Not Qualified	e3		24
CS82C55A-5Z	Renesas Electronics	PARALLEL IO PORT, GENERAL PURPOSE	COMMERCIAL	J BEND	44	QCCJ	SQUARE	PLASTIC/EPOXY	YES	5.5 V			CHIP CARRIER		4.5 V	70 Cel		0 Cel	MATTE TIN		QUAD	3	4.57 mm	16.585 mm				30	260	16.585 mm			CMOS		5 V			1.27 mm	S-PQCC-J44	3	Not Qualified	e3		24
CS82C55A-5Z96	Renesas Electronics	PARALLEL IO PORT, GENERAL PURPOSE	COMMERCIAL	J BEND	44	QCCJ	SQUARE	PLASTIC/EPOXY	YES	5.5 V			CHIP CARRIER		4.5 V	70 Cel		0 Cel	MATTE TIN		QUAD	3	4.57 mm	16.585 mm				30	260	16.585 mm			CMOS		5 V			1.27 mm	S-PQCC-J44	3	Not Qualified	e3		24
CP82C55A	Renesas Electronics	PARALLEL IO PORT, GENERAL PURPOSE	COMMERCIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	5.5 V		5	IN-LINE	DIP40,.6	4.5 V	70 Cel		0 Cel	TIN LEAD		DUAL	3	6.35 mm	15.24 mm						51.75 mm			CMOS	8 mA	5 V		Parallel IO Port	2.54 mm	R-PDIP-T40		Not Qualified	e0		24
CQ82C55AZ	Renesas Electronics	PARALLEL IO PORT, GENERAL PURPOSE	COMMERCIAL	GULL WING	44	QFP	SQUARE	PLASTIC/EPOXY	YES	5.5 V			FLATPACK		4.5 V	70 Cel		0 Cel	MATTE TIN		QUAD	3	2.45 mm	10 mm				30	260	10 mm			CMOS		5 V			.8 mm	S-PQFP-G44	3	Not Qualified	e3		24
CS82C55A-5	Renesas Electronics	PARALLEL IO PORT, GENERAL PURPOSE	COMMERCIAL	J BEND	44	QCCJ	SQUARE	PLASTIC/EPOXY	YES	5.5 V		5	CHIP CARRIER	LDCC44,.7SQ	4.5 V	70 Cel		0 Cel	TIN LEAD		QUAD	3	4.57 mm	16.585 mm						16.585 mm			CMOS	5 mA	5 V		Parallel IO Port	1.27 mm	S-PQCC-J44	1	Not Qualified	e0		24
Z0853606VSG	IXYS Corporation	PARALLEL IO PORT, GENERAL PURPOSE	COMMERCIAL	J BEND	44	QCCJ	SQUARE	PLASTIC/EPOXY	YES	5.25 V			CHIP CARRIER		4.75 V	70 Cel		0 Cel	MATTE TIN		QUAD	3	4.57 mm	16.51 mm		8	6.06 MHz			16.51 mm			NMOS	200 mA	5 V			1.27 mm	S-PQCC-J44		Not Qualified	e3		20
CP82C55A-5	Renesas Electronics	PARALLEL IO PORT, GENERAL PURPOSE	COMMERCIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	5.5 V		5	IN-LINE	DIP40,.6	4.5 V	70 Cel		0 Cel	TIN LEAD		DUAL	3	6.35 mm	15.24 mm						51.75 mm			CMOS	5 mA	5 V		Parallel IO Port	2.54 mm	R-PDIP-T40		Not Qualified	e0		24
TMS9901JL	Texas Instruments		COMMERCIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	CERAMIC	NO				IN-LINE	DIP40,.6		70 Cel		0 Cel			DUAL												MOS				Parallel IO Port	2.54 mm	R-XDIP-T40		Not Qualified
TMS9901JDL	Texas Instruments		COMMERCIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	CERAMIC	NO				IN-LINE	DIP40,.6		70 Cel		0 Cel			DUAL												MOS				Parallel IO Port	2.54 mm	R-XDIP-T40		Not Qualified
TMS9901JDL-40	Texas Instruments		COMMERCIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	CERAMIC	NO				IN-LINE	DIP40,.6		70 Cel		0 Cel			DUAL												MOS				Parallel IO Port	2.54 mm	R-XDIP-T40		Not Qualified
TMS9901NL	Texas Instruments		COMMERCIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	PLASTIC/EPOXY	NO				IN-LINE	DIP40,.6		70 Cel		0 Cel			DUAL												MOS				Parallel IO Port	2.54 mm	R-PDIP-T40		Not Qualified
TMS9901NL-40	Texas Instruments		COMMERCIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	PLASTIC/EPOXY	NO				IN-LINE	DIP40,.6		70 Cel		0 Cel			DUAL												MOS				Parallel IO Port	2.54 mm	R-PDIP-T40		Not Qualified
P8155H	Rochester Electronics	PARALLEL IO PORT, GENERAL PURPOSE	COMMERCIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	5.5 V			IN-LINE		4.5 V	70 Cel		0 Cel			DUAL	3	5.08 mm	15.24 mm				NOT SPECIFIED	NOT SPECIFIED	52.26 mm			NMOS		5 V			2.54 mm	R-PDIP-T40					22
R6532P	Conexant Systems	PARALLEL IO PORT, GENERAL PURPOSE	COMMERCIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	5.25 V	8	5	IN-LINE	DIP40,.6	4.75 V	70 Cel	6500	0 Cel	TIN LEAD		DUAL	2	5.08 mm	15.24 mm		8	1 MHz			52.07 mm		1	MOS	190 mA	5 V	128X8	Parallel IO Port	2.54 mm	R-PDIP-T40		Not Qualified	e0		16
CD82C55A-5	Intersil	PARALLEL IO PORT, GENERAL PURPOSE	COMMERCIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	CERAMIC, GLASS-SEALED	NO	5.5 V		5	IN-LINE	DIP40,.6	4.5 V	70 Cel		0 Cel	Tin/Lead (Sn/Pb)		DUAL	3	5.72 mm	15.24 mm									CMOS	5 mA	5 V		Parallel IO Port	2.54 mm	R-GDIP-T40		Not Qualified	e0		24
Z0842006PSC	IXYS Corporation	PARALLEL IO PORT, GENERAL PURPOSE	COMMERCIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	5.25 V		5	IN-LINE	DIP40,.6	4.75 V	70 Cel		0 Cel	TIN LEAD		DUAL	2	4.75 mm	15.24 mm		8	6.17 MHz		240	52.325 mm			NMOS	100 mA	5 V		Other Microprocessor ICs	2.54 mm	R-PDIP-T40		Not Qualified	e0		16
74LVC1284D,112	NXP Semiconductors	PARALLEL IO PORT, PRINTER INTERFACE	COMMERCIAL	GULL WING	20	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	3.6 V			SMALL OUTLINE		3 V	70 Cel		0 Cel	NICKEL PALLADIUM GOLD		DUAL	1	2.65 mm	7.5 mm						12.8 mm			CMOS		3.3 V			1.27 mm	R-PDSO-G20	1	Not Qualified	e4		8
P8155H-2	Rochester Electronics	PARALLEL IO PORT, GENERAL PURPOSE	COMMERCIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	5.5 V			IN-LINE		4.5 V	70 Cel		0 Cel			DUAL	3	5.08 mm	15.24 mm				NOT SPECIFIED	NOT SPECIFIED	52.26 mm			NMOS		5 V			2.54 mm	R-PDIP-T40					22
R6532AP	Conexant Systems	PARALLEL IO PORT, GENERAL PURPOSE	COMMERCIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	5.25 V	8	5	IN-LINE	DIP40,.6	4.75 V	70 Cel	6500	0 Cel	TIN LEAD		DUAL	2	5.08 mm	15.24 mm		8	2 MHz			52.07 mm		1	MOS	190 mA	5 V	128X8	Parallel IO Port	2.54 mm	R-PDIP-T40		Not Qualified	e0		16
R6532C	Conexant Systems	PARALLEL IO PORT, GENERAL PURPOSE	COMMERCIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	CERAMIC, METAL-SEALED COFIRED	NO	5.25 V	8	5	IN-LINE	DIP40,.6	4.75 V	70 Cel	6500	0 Cel	TIN LEAD		DUAL	2	4.19 mm	15.24 mm		8	1 MHz			50.8 mm		1	MOS	190 mA	5 V	128X8	Parallel IO Port	2.54 mm	R-CDIP-T40		Not Qualified	e0		16
ZPSD312-B-70J	STMicroelectronics	PARALLEL IO PORT, GENERAL PURPOSE	COMMERCIAL	J BEND	44	QCCJ	SQUARE	PLASTIC/EPOXY	YES	5.5 V		5	CHIP CARRIER	LDCC44,.7SQ	4.5 V	70 Cel		0 Cel	TIN LEAD	N	QUAD	3	4.57 mm	16.56 mm						16.56 mm	524288 Bits		CMOS		5 V		Other Microprocessor ICs	1.27 mm	S-PQCC-J44		Not Qualified	e0	.00002 Amp	19	.00000007 ns
MC6821P	Motorola	PARALLEL IO PORT, GENERAL PURPOSE	COMMERCIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	5.25 V		5	IN-LINE	DIP40,.6	4.75 V	70 Cel		0 Cel	TIN LEAD		DUAL	2	5.08 mm	15.24 mm		8	1 MHz			52.07 mm			NMOS		5 V		Parallel IO Port	2.54 mm	R-PDIP-T40		Not Qualified	e0		16
ZPSD302-B-70J	STMicroelectronics	PARALLEL IO PORT, GENERAL PURPOSE	COMMERCIAL	J BEND	44	QCCJ	SQUARE	PLASTIC/EPOXY	YES	5.5 V		5	CHIP CARRIER	LDCC44,.7SQ	4.5 V	70 Cel		0 Cel	MATTE TIN	N	QUAD	3	4.57 mm	16.56 mm						16.56 mm	524288 Bits		CMOS		5 V		Other Microprocessor ICs	1.27 mm	S-PQCC-J44		Not Qualified	e3	.00002 Amp	19	.00000007 ns
MC68B21P	Motorola	PARALLEL IO PORT, GENERAL PURPOSE	COMMERCIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	5.25 V		5	IN-LINE	DIP40,.6	4.75 V	70 Cel		0 Cel	TIN LEAD		DUAL	2	5.08 mm	15.24 mm		8	2 MHz			52.07 mm			NMOS		5 V		Parallel IO Port	2.54 mm	R-PDIP-T40		Not Qualified	e0		16
MC68230P10	Motorola	PARALLEL IO PORT, GENERAL PURPOSE	COMMERCIAL	THROUGH-HOLE	48	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	5.25 V			IN-LINE		4.75 V	70 Cel		0 Cel	Tin/Lead (Sn/Pb)		DUAL	3											CMOS		5 V				R-PDIP-T48			e0		24
N82C55A-2	Rochester Electronics	PARALLEL IO PORT, GENERAL PURPOSE	COMMERCIAL	J BEND	44	QCCJ	SQUARE	PLASTIC/EPOXY	YES	5.5 V			CHIP CARRIER		4.5 V	70 Cel		0 Cel			QUAD	3	4.57 mm	16.6 mm						16.6 mm			CMOS		5 V			1.27 mm	S-PQCC-J44					24
P8156H-2	Intel	PARALLEL IO PORT, GENERAL PURPOSE	COMMERCIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	5.5 V	14	5	IN-LINE	DIP40,.6	4.5 V	70 Cel	8085	0 Cel	TIN LEAD		DUAL	3	5.08 mm	15.24 mm		8				52.26 mm		1	NMOS	125 mA	5 V	256X8	Parallel IO Port	2.54 mm	R-PDIP-T40		Not Qualified	e0		22
P8255A-5	Rochester Electronics	PARALLEL IO PORT, GENERAL PURPOSE	COMMERCIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	5.5 V			IN-LINE		4.5 V	70 Cel		0 Cel			DUAL	3	5.08 mm	15.24 mm				NOT SPECIFIED	NOT SPECIFIED	52.26 mm			NMOS		5 V			2.54 mm	R-PDIP-T40					24
P82C55A-2	Rochester Electronics	PARALLEL IO PORT, GENERAL PURPOSE	COMMERCIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	5.5 V			IN-LINE		4.5 V	70 Cel		0 Cel			DUAL	3	5.08 mm	15.24 mm				NOT SPECIFIED	NOT SPECIFIED	52.26 mm			CMOS		5 V			2.54 mm	R-PDIP-T40					24
CS82C55A	Renesas Electronics	PARALLEL IO PORT, GENERAL PURPOSE	COMMERCIAL	J BEND	44	QCCJ	SQUARE	PLASTIC/EPOXY	YES	5.5 V		5	CHIP CARRIER	LDCC44,.7SQ	4.5 V	70 Cel		0 Cel	TIN LEAD		QUAD	3	4.57 mm	16.585 mm						16.585 mm			CMOS	8 mA	5 V		Parallel IO Port	1.27 mm	S-PQCC-J44	1	Not Qualified	e0		24
P8243	Rochester Electronics	PARALLEL IO PORT, GENERAL PURPOSE	COMMERCIAL	THROUGH-HOLE	24	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	5.5 V			IN-LINE		4.5 V	70 Cel		0 Cel			DUAL	4	5.08 mm	15.24 mm	AND, OR ACCUMULATOR TO PORT			NOT SPECIFIED	NOT SPECIFIED	31.685 mm			NMOS		5 V			2.54 mm	R-PDIP-T24					16
TMP8243P	Toshiba		COMMERCIAL	THROUGH-HOLE	24	DIP	RECTANGULAR	PLASTIC/EPOXY	NO		4	5	IN-LINE	DIP24,.6		70 Cel		0 Cel	Tin/Lead (Sn/Pb)		DUAL												MOS		5 V		Parallel IO Port	2.54 mm	R-PDIP-T24		Not Qualified	e0
TMP8255AP-5	Toshiba	PARALLEL IO PORT, GENERAL PURPOSE	COMMERCIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	5.25 V			IN-LINE		4.75 V	70 Cel		0 Cel	TIN LEAD		DUAL	3	4.8 mm	15.24 mm						50.7 mm			CMOS		5 V			2.54 mm	R-PDIP-T40		Not Qualified	e0		24
D8255A	Rochester Electronics	PARALLEL IO PORT, GENERAL PURPOSE	COMMERCIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	UNSPECIFIED	NO	5.5 V			IN-LINE		4.5 V	70 Cel		0 Cel			DUAL	3						NOT SPECIFIED	NOT SPECIFIED				CMOS		5 V				R-XDIP-T40					24
LD8155H	Rochester Electronics	PARALLEL IO PORT, GENERAL PURPOSE	COMMERCIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	CERAMIC, GLASS-SEALED	NO	5.5 V			IN-LINE		4.5 V	70 Cel		0 Cel			DUAL	3	5.72 mm	15.24 mm				NOT SPECIFIED	NOT SPECIFIED	52.325 mm			NMOS		5 V			2.54 mm	R-GDIP-T40					22
MCS9805CV-BA	Asix Electronics	PARALLEL IO PORT, PRINTER INTERFACE	COMMERCIAL	GULL WING	128	FQFP	RECTANGULAR	PLASTIC/EPOXY	YES	5.25 V			FLATPACK, FINE PITCH		4.75 V	70 Cel		0 Cel			QUAD	1	3.27 mm	14 mm				NOT SPECIFIED	NOT SPECIFIED	20 mm			CMOS		5 V			.5 mm	R-PQFP-G128					8
PCD8584T	Philips Semiconductors		COMMERCIAL	GULL WING	20	SOP	RECTANGULAR	PLASTIC/EPOXY	YES		8	5	SMALL OUTLINE	SOP20,.4		70 Cel		-20 Cel	Tin/Lead (Sn/Pb)		DUAL												CMOS		5 V		Parallel IO Port	1.27 mm	R-PDSO-G20		Not Qualified	e0
SN74LS612JD	Texas Instruments	PARALLEL IO PORT, GENERAL PURPOSE	COMMERCIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	CERAMIC, METAL-SEALED COFIRED	NO			5	IN-LINE	DIP40,.6		70 Cel		0 Cel			DUAL	1						NOT SPECIFIED	NOT SPECIFIED				TTL		5 V		Other Microprocessor ICs	2.54 mm	R-CDIP-T40		Not Qualified			12
SN74LS610JD	Texas Instruments	PARALLEL IO PORT, GENERAL PURPOSE	COMMERCIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	CERAMIC, METAL-SEALED COFIRED	NO				IN-LINE	DIP40,.6		70 Cel		0 Cel			DUAL	1						NOT SPECIFIED	NOT SPECIFIED				TTL				Other Microprocessor ICs	2.54 mm	R-CDIP-T40		Not Qualified			12
SN74LS612FN	Texas Instruments	PARALLEL IO PORT, GENERAL PURPOSE	COMMERCIAL	J BEND	44	QCCJ	SQUARE	PLASTIC/EPOXY	YES	5.25 V		5	CHIP CARRIER	LDCC(UNSPEC)	4.75 V	70 Cel		0 Cel			QUAD	1	4.57 mm	16.5862 mm				NOT SPECIFIED	NOT SPECIFIED	16.5862 mm			TTL		5 V		Other Microprocessor ICs	1.27 mm	S-PQCC-J44		Not Qualified			12
SN74LS610N	Texas Instruments	PARALLEL IO PORT, GENERAL PURPOSE	COMMERCIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	PLASTIC/EPOXY	NO				IN-LINE	DIP40,.6		70 Cel		0 Cel			DUAL	1	5.08 mm	15.24 mm				NOT SPECIFIED	NOT SPECIFIED	52.455 mm			TTL				Other Microprocessor ICs	2.54 mm	R-PDIP-T40		Not Qualified			12
SN74LS611FN	Texas Instruments	PARALLEL IO PORT, GENERAL PURPOSE	COMMERCIAL	J BEND	44	QCCJ	SQUARE	PLASTIC/EPOXY	YES	5.25 V			CHIP CARRIER	LDCC(UNSPEC)	4.75 V	70 Cel		0 Cel			QUAD	1	4.57 mm	16.5862 mm				NOT SPECIFIED	NOT SPECIFIED	16.5862 mm			TTL		5 V		Other Microprocessor ICs	1.27 mm	S-PQCC-J44		Not Qualified			12
SN74S412NP1	Texas Instruments		COMMERCIAL	THROUGH-HOLE	24	DIP	RECTANGULAR	PLASTIC/EPOXY	NO		8		IN-LINE	DIP24,.6		70 Cel		0 Cel			DUAL							NOT SPECIFIED	NOT SPECIFIED				CMOS				Parallel IO Port	2.54 mm	R-PDIP-T24		Not Qualified
SN74LS613JD	Texas Instruments	PARALLEL IO PORT, GENERAL PURPOSE	COMMERCIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	CERAMIC, METAL-SEALED COFIRED	NO	5.25 V			IN-LINE	DIP40,.6	4.75 V	70 Cel		0 Cel			DUAL	1						NOT SPECIFIED	NOT SPECIFIED				CMOS		5 V		Other Microprocessor ICs	2.54 mm	R-CDIP-T40		Not Qualified			12

Parallel I/O Ports

Parallel I/O (Input/Output) ports are a type of interface that allows a microcontroller or microprocessor to communicate with other devices in a parallel fashion. This means that multiple bits of data can be transmitted or received simultaneously, as opposed to serial communication which transmits or receives data one bit at a time.

Parallel I/O ports are commonly found in a wide range of electronic devices, including computers, printers, and industrial control systems. They typically consist of a number of input and output lines, with each line representing a single bit of data. The number of lines can vary depending on the specific device, with some systems having only a few lines while others may have dozens or even hundreds.

One of the advantages of parallel I/O ports is their ability to transfer large amounts of data quickly and efficiently. This makes them particularly useful in applications where real-time data acquisition or high-speed communication is required. For example, parallel ports are commonly used in printers and other peripherals to transfer large amounts of data quickly.

However, one of the limitations of parallel I/O ports is that they require a large number of pins on the microcontroller or microprocessor to accommodate all of the data lines. This can make them difficult to implement in systems with limited space or where a large number of I/O lines are required. In addition, parallel I/O ports can be more susceptible to noise and interference compared to serial communication, which can affect data integrity and transmission speeds.