RECTANGULAR Parallel I/O Ports 1,466

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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	Minimum Operating Temperature	Terminal Finish	Terminal Position	No. of Ports	Maximum Seated Height	Width	External Data Bus Width	Maximum Clock Frequency	Maximum Time At Peak Reflow Temperature (s)	Peak Reflow Temperature (C)	Length	Technology	Maximum Supply Current	Nominal Supply Voltage	Sub-Category	Terminal Pitch	JESD-30 Code	Moisture Sensitivity Level (MSL)	Qualification	JESD-609 Code	No. of I/O Lines
Z8536B6V	STMicroelectronics	PARALLEL IO PORT, GENERAL PURPOSE	INDUSTRIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	5.25 V		5	IN-LINE	DIP40,.6	4.75 V	85 Cel	-40 Cel	TIN LEAD	DUAL	3		15.24 mm						CMOS		5 V	Parallel IO Port	2.54 mm	R-PDIP-T40		Not Qualified	e0	20
Z8420AF1	STMicroelectronics	PARALLEL IO PORT, GENERAL PURPOSE	COMMERCIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	CERAMIC, GLASS-SEALED	NO	5.25 V		5	IN-LINE	DIP40,.6	4.75 V	70 Cel	0 Cel	TIN LEAD	DUAL	2								CMOS	100 mA	5 V	Other Microprocessor ICs	2.54 mm	R-GDIP-T40		Not Qualified	e0	20
Z8420BD2	STMicroelectronics	PARALLEL IO PORT, GENERAL PURPOSE	MILITARY	THROUGH-HOLE	40	DIP	RECTANGULAR	CERAMIC, METAL-SEALED COFIRED	NO	5.25 V		5	IN-LINE	DIP40,.6	4.75 V	125 Cel	-55 Cel	TIN LEAD	DUAL	2		15.24 mm						CMOS	100 mA	5 V	Other Microprocessor ICs	2.54 mm	R-CDIP-T40		Not Qualified	e0	20
Z8036AD1	STMicroelectronics	PARALLEL IO PORT, GENERAL PURPOSE	COMMERCIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	CERAMIC, METAL-SEALED COFIRED	NO	5.25 V			IN-LINE		4.75 V	70 Cel	0 Cel		DUAL	3		15.24 mm	8	6 MHz				MOS	250 mA	5 V		2.54 mm	R-CDIP-T40		Not Qualified		20
Z8536BB1V	STMicroelectronics		COMMERCIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	PLASTIC/EPOXY	NO			5	IN-LINE	DIP40,.6		70 Cel	0 Cel	Tin/Lead (Sn/Pb)	DUAL									MOS		5 V	Parallel IO Port	2.54 mm	R-PDIP-T40		Not Qualified	e0
EF6821PV	STMicroelectronics		COMMERCIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	PLASTIC/EPOXY	NO			5	IN-LINE	DIP40,.6		70 Cel	0 Cel	Tin/Lead (Sn/Pb)	DUAL									MOS		5 V	Parallel IO Port	2.54 mm	R-PDIP-T40		Not Qualified	e0
EF6821CV	STMicroelectronics		INDUSTRIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	CERAMIC	NO			5	IN-LINE	DIP40,.6		85 Cel	-40 Cel		DUAL									MOS		5 V	Parallel IO Port	2.54 mm	R-XDIP-T40		Not Qualified
Z8536D2N	STMicroelectronics	PARALLEL IO PORT, GENERAL PURPOSE	MILITARY	THROUGH-HOLE	40	DIP	RECTANGULAR	CERAMIC, METAL-SEALED COFIRED	NO	5.25 V		5	IN-LINE	DIP40,.6	4.75 V	125 Cel	-55 Cel	TIN LEAD	DUAL	3		15.24 mm						CMOS		5 V	Parallel IO Port	2.54 mm	R-CDIP-T40		Not Qualified	e0	20
Z8420D1	STMicroelectronics	PARALLEL IO PORT, GENERAL PURPOSE	COMMERCIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	CERAMIC, METAL-SEALED COFIRED	NO	5.25 V		5	IN-LINE	DIP40,.6	4.75 V	70 Cel	0 Cel	TIN LEAD	DUAL	2		15.24 mm						CMOS	100 mA	5 V	Other Microprocessor ICs	2.54 mm	R-CDIP-T40		Not Qualified	e0	20
Z8036AD6	STMicroelectronics	PARALLEL IO PORT, GENERAL PURPOSE	INDUSTRIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	CERAMIC, METAL-SEALED COFIRED	NO	5.25 V			IN-LINE		4.75 V	85 Cel	-40 Cel		DUAL	3		15.24 mm	8	6 MHz				MOS	250 mA	5 V		2.54 mm	R-CDIP-T40		Not Qualified		20
TS68230CP8	STMicroelectronics	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	DUAL	3	5.08 mm	15.24 mm	8	8 MHz			63.5 mm	CMOS		5 V		2.54 mm	R-PDIP-T48		Not Qualified	e0	24
Z8536AB1V	STMicroelectronics	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	3		15.24 mm						CMOS		5 V	Parallel IO Port	2.54 mm	R-PDIP-T40		Not Qualified	e0	20
Z8420B1	STMicroelectronics	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		15.24 mm					52.18 mm	CMOS	100 mA	5 V	Other Microprocessor ICs	2.54 mm	R-PDIP-T40		Not Qualified	e0	20
Z8536D1N	STMicroelectronics	PARALLEL IO PORT, GENERAL PURPOSE	COMMERCIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	CERAMIC, METAL-SEALED COFIRED	NO	5.25 V		5	IN-LINE	DIP40,.6	4.75 V	70 Cel	0 Cel	TIN LEAD	DUAL	3		15.24 mm						CMOS		5 V	Parallel IO Port	2.54 mm	R-CDIP-T40		Not Qualified	e0	20
EF68B21J	STMicroelectronics		COMMERCIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	CERAMIC	NO			5	IN-LINE	DIP40,.6		70 Cel	0 Cel	TIN LEAD	DUAL									MOS		5 V	Parallel IO Port	2.54 mm	R-XDIP-T40		Not Qualified	e0
STMPE801MTR	STMicroelectronics	PARALLEL IO PORT, GENERAL PURPOSE	INDUSTRIAL	GULL WING	16	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	3.6 V	8	1.8/3.3	SMALL OUTLINE	SOP16,.25	1.65 V	85 Cel	-40 Cel	Nickel/Palladium/Gold (Ni/Pd/Au)	DUAL	1	1.75 mm	3.9 mm			30	260	9.9 mm	CMOS			Parallel IO Port	1.27 mm	R-PDSO-G16	3	Not Qualified	e4	8
EF68A21P	STMicroelectronics		COMMERCIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	PLASTIC/EPOXY	NO			5	IN-LINE	DIP40,.6		70 Cel	0 Cel	TIN LEAD	DUAL									MOS		5 V	Parallel IO Port	2.54 mm	R-PDIP-T40		Not Qualified	e0
EF68B21P	STMicroelectronics		COMMERCIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	PLASTIC/EPOXY	NO			5	IN-LINE	DIP40,.6		70 Cel	0 Cel	TIN LEAD	DUAL									MOS		5 V	Parallel IO Port	2.54 mm	R-PDIP-T40		Not Qualified	e0
Z8536AB6V	STMicroelectronics	PARALLEL IO PORT, GENERAL PURPOSE	INDUSTRIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	5.25 V		5	IN-LINE	DIP40,.6	4.75 V	85 Cel	-40 Cel	TIN LEAD	DUAL	3		15.24 mm						CMOS		5 V	Parallel IO Port	2.54 mm	R-PDIP-T40		Not Qualified	e0	20
EF68A21PV	STMicroelectronics		INDUSTRIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	PLASTIC/EPOXY	NO			5	IN-LINE	DIP40,.6		85 Cel	-40 Cel	Tin/Lead (Sn/Pb)	DUAL									MOS		5 V	Parallel IO Port	2.54 mm	R-PDIP-T40		Not Qualified	e0
Z8536B1V	STMicroelectronics	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	3		15.24 mm						CMOS		5 V	Parallel IO Port	2.54 mm	R-PDIP-T40		Not Qualified	e0	20
STMPE801QTR	STMicroelectronics	PARALLEL IO PORT, GENERAL PURPOSE	INDUSTRIAL	NO LEAD	16	VQCCN	RECTANGULAR	UNSPECIFIED	YES	3.6 V	8	1.8/3.3	CHIP CARRIER, VERY THIN PROFILE	LCC16,.07X.1,16	1.65 V	85 Cel	-40 Cel	Nickel/Palladium/Gold (Ni/Pd/Au)	QUAD	1	.65 mm	1.8 mm			30	260	2.6 mm	CMOS			Parallel IO Port	.4 mm	R-XQCC-N16	1	Not Qualified	e4	8
Z8536D6N	STMicroelectronics	PARALLEL IO PORT, GENERAL PURPOSE	INDUSTRIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	CERAMIC, METAL-SEALED COFIRED	NO	5.25 V		5	IN-LINE	DIP40,.6	4.75 V	85 Cel	-40 Cel	TIN LEAD	DUAL	3		15.24 mm						CMOS		5 V	Parallel IO Port	2.54 mm	R-CDIP-T40		Not Qualified	e0	20
Z8036AB6	STMicroelectronics	PARALLEL IO PORT, GENERAL PURPOSE	INDUSTRIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	5.25 V			IN-LINE		4.75 V	85 Cel	-40 Cel		DUAL	3		15.24 mm	8	6 MHz				MOS	250 mA	5 V		2.54 mm	R-PDIP-T40		Not Qualified		20
EF68B21PV	STMicroelectronics		COMMERCIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	PLASTIC/EPOXY	NO			5	IN-LINE	DIP40,.6		70 Cel	0 Cel	Tin/Lead (Sn/Pb)	DUAL									MOS		5 V	Parallel IO Port	2.54 mm	R-PDIP-T40		Not Qualified	e0
EF68A21CV	STMicroelectronics		INDUSTRIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	CERAMIC	NO			5	IN-LINE	DIP40,.6		85 Cel	-40 Cel		DUAL									MOS		5 V	Parallel IO Port	2.54 mm	R-XDIP-T40		Not Qualified
Z8420D6	STMicroelectronics	PARALLEL IO PORT, GENERAL PURPOSE	INDUSTRIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	CERAMIC, METAL-SEALED COFIRED	NO	5.25 V		5	IN-LINE	DIP40,.6	4.75 V	85 Cel	-40 Cel	TIN LEAD	DUAL	2		15.24 mm						CMOS	100 mA	5 V	Other Microprocessor ICs	2.54 mm	R-CDIP-T40		Not Qualified	e0	20
EF68B21JV	STMicroelectronics		INDUSTRIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	CERAMIC	NO			5	IN-LINE	DIP40,.6		85 Cel	-40 Cel		DUAL									MOS		5 V	Parallel IO Port	2.54 mm	R-XDIP-T40		Not Qualified
Z8420AD6	STMicroelectronics	PARALLEL IO PORT, GENERAL PURPOSE	INDUSTRIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	CERAMIC, METAL-SEALED COFIRED	NO	5.25 V		5	IN-LINE	DIP40,.6	4.75 V	85 Cel	-40 Cel	TIN LEAD	DUAL	2		15.24 mm						CMOS	100 mA	5 V	Other Microprocessor ICs	2.54 mm	R-CDIP-T40		Not Qualified	e0	20
Z8036AB1	STMicroelectronics	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		DUAL	3		15.24 mm	8	6 MHz				MOS	250 mA	5 V		2.54 mm	R-PDIP-T40		Not Qualified		20
TS68230CP10	STMicroelectronics	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	DUAL	3	5.08 mm	15.24 mm	8	10 MHz			63.5 mm	CMOS		5 V		2.54 mm	R-PDIP-T48		Not Qualified	e0	24
Z8036B6	STMicroelectronics	PARALLEL IO PORT, GENERAL PURPOSE	INDUSTRIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	5.25 V			IN-LINE		4.75 V	85 Cel	-40 Cel		DUAL	3		15.24 mm	8	4 MHz				MOS	250 mA	5 V		2.54 mm	R-PDIP-T40		Not Qualified		20
Z8420BD1	STMicroelectronics	PARALLEL IO PORT, GENERAL PURPOSE	COMMERCIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	CERAMIC, METAL-SEALED COFIRED	NO	5.25 V		5	IN-LINE	DIP40,.6	4.75 V	70 Cel	0 Cel	TIN LEAD	DUAL	2		15.24 mm						CMOS	100 mA	5 V	Other Microprocessor ICs	2.54 mm	R-CDIP-T40		Not Qualified	e0	20
Z8420AD1	STMicroelectronics	PARALLEL IO PORT, GENERAL PURPOSE	COMMERCIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	CERAMIC, METAL-SEALED COFIRED	NO	5.25 V		5	IN-LINE	DIP40,.6	4.75 V	70 Cel	0 Cel	TIN LEAD	DUAL	2		15.24 mm						CMOS	100 mA	5 V	Other Microprocessor ICs	2.54 mm	R-CDIP-T40		Not Qualified	e0	20
Z84C20AD6	STMicroelectronics	PARALLEL IO PORT, GENERAL PURPOSE	INDUSTRIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	CERAMIC, METAL-SEALED COFIRED	NO	5.5 V		5	IN-LINE	DIP40,.6	4.5 V	85 Cel	-40 Cel	TIN LEAD	DUAL	2		15.24 mm						CMOS	5 mA	5 V	Other Microprocessor ICs	2.54 mm	R-CDIP-T40		Not Qualified	e0	20
Z84C20BD2	STMicroelectronics	PARALLEL IO PORT, GENERAL PURPOSE	MILITARY	THROUGH-HOLE	40	DIP	RECTANGULAR	CERAMIC, METAL-SEALED COFIRED	NO	5.5 V		5	IN-LINE	DIP40,.6	4.5 V	125 Cel	-55 Cel	TIN LEAD	DUAL	2		15.24 mm						CMOS	8 mA	5 V	Other uPs/uCs/Peripheral ICs	2.54 mm	R-CDIP-T40		Not Qualified	e0	20
Z84C20BB6	STMicroelectronics	PARALLEL IO PORT, GENERAL PURPOSE	INDUSTRIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	5.5 V		5	IN-LINE	DIP40,.6	4.5 V	85 Cel	-40 Cel	TIN LEAD	DUAL	2		15.24 mm					52.18 mm	CMOS	8 mA	5 V	Other Microprocessor ICs	2.54 mm	R-PDIP-T40		Not Qualified	e0	20
Z84C20AD2	STMicroelectronics	PARALLEL IO PORT, GENERAL PURPOSE	MILITARY	THROUGH-HOLE	40	DIP	RECTANGULAR	CERAMIC, METAL-SEALED COFIRED	NO	5.5 V		5	IN-LINE	DIP40,.6	4.5 V	125 Cel	-55 Cel	TIN LEAD	DUAL	2		15.24 mm						CMOS	5 mA	5 V	Other Microprocessor ICs	2.54 mm	R-CDIP-T40		Not Qualified	e0	20
Z84C20AB6	STMicroelectronics	PARALLEL IO PORT, GENERAL PURPOSE	INDUSTRIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	5.5 V		5	IN-LINE	DIP40,.6	4.5 V	85 Cel	-40 Cel	TIN LEAD	DUAL	2		15.24 mm					52.18 mm	CMOS	5 mA	5 V	Other Microprocessor ICs	2.54 mm	R-PDIP-T40		Not Qualified	e0	20
Z84C20BD6	STMicroelectronics	PARALLEL IO PORT, GENERAL PURPOSE	INDUSTRIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	CERAMIC, METAL-SEALED COFIRED	NO	5.5 V		5	IN-LINE	DIP40,.6	4.5 V	85 Cel	-40 Cel	TIN LEAD	DUAL	2		15.24 mm						CMOS	8 mA	5 V	Other uPs/uCs/Peripheral ICs	2.54 mm	R-CDIP-T40		Not Qualified	e0	20
935269193112	NXP Semiconductors	PARALLEL IO PORT, GENERAL PURPOSE	INDUSTRIAL	GULL WING	16	SSOP	RECTANGULAR	PLASTIC/EPOXY	YES	5.5 V			SMALL OUTLINE, SHRINK PITCH		2.3 V	85 Cel	-40 Cel	NICKEL PALLADIUM GOLD	DUAL	1	2 mm	5.3 mm					6.2 mm	CMOS		3 V		.65 mm	R-PDSO-G16	1	Not Qualified	e4	8
935282736512	NXP Semiconductors	PARALLEL IO PORT, GENERAL PURPOSE	INDUSTRIAL	GULL WING	16	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	5.5 V			SMALL OUTLINE		2.3 V	85 Cel	-40 Cel		DUAL	1	2.65 mm	7.5 mm					10.3 mm	CMOS		3 V		1.27 mm	R-PDSO-G16				8
935283556118	NXP Semiconductors	PARALLEL IO PORT, GENERAL PURPOSE	INDUSTRIAL	GULL WING	24	SSOP	RECTANGULAR	PLASTIC/EPOXY	YES	5.5 V			SMALL OUTLINE, SHRINK PITCH		2.3 V	85 Cel	-40 Cel		DUAL	1	2 mm	5.3 mm					8.2 mm	CMOS				.65 mm	R-PDSO-G24				18
935270669118	NXP Semiconductors	PARALLEL IO PORT, GENERAL PURPOSE	INDUSTRIAL	GULL WING	16	TSSOP	RECTANGULAR	PLASTIC/EPOXY	YES	5.5 V			SMALL OUTLINE, THIN PROFILE, SHRINK PITCH		2.3 V	85 Cel	-40 Cel	Nickel/Palladium/Gold (Ni/Pd/Au)	DUAL	1	1.1 mm	4.4 mm			30	260	5 mm	CMOS				.65 mm	R-PDSO-G16	1	Not Qualified	e4	8
7LVC1284D-T	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		DUAL	1	2.65 mm	7.5 mm					12.8 mm	CMOS		3.3 V		1.27 mm	R-PDSO-G20		Not Qualified		7
935278587118	NXP Semiconductors	PARALLEL IO PORT, GENERAL PURPOSE	INDUSTRIAL	GULL WING	16	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	5.5 V			SMALL OUTLINE		2.3 V	85 Cel	-40 Cel		DUAL	1	1.75 mm	3.9 mm					9.9 mm	CMOS				1.27 mm	R-PDSO-G16				8
935283551118	NXP Semiconductors	PARALLEL IO PORT, GENERAL PURPOSE	INDUSTRIAL	GULL WING	24	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	5.5 V			SMALL OUTLINE		2.3 V	85 Cel	-40 Cel		DUAL	1	2.65 mm	7.5 mm					15.4 mm	CMOS		3 V		1.27 mm	R-PDSO-G24				16
935269568112	NXP Semiconductors	PARALLEL IO PORT, GENERAL PURPOSE	INDUSTRIAL	GULL WING	24	SSOP	RECTANGULAR	PLASTIC/EPOXY	YES	5.5 V			SMALL OUTLINE, SHRINK PITCH		2.3 V	85 Cel	-40 Cel	NICKEL PALLADIUM GOLD	DUAL	2	2 mm	5.3 mm					8.2 mm	CMOS		3 V		.65 mm	R-PDSO-G24	1	Not Qualified	e4	16

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.