Texas Instruments Parallel I/O Ports 461

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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	Screening Level	Address Bus Width	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	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	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	No. of I/O Lines
SNJ54LS613JD	Texas Instruments	PARALLEL IO PORT, GENERAL PURPOSE	MILITARY	THROUGH-HOLE	40	DIP	RECTANGULAR	CERAMIC, METAL-SEALED COFIRED	NO	5.5 V	38535Q/M;38534H;883B				IN-LINE	DIP40,.6	4.5 V	125 Cel		-55 Cel		DUAL	1					NOT SPECIFIED	NOT SPECIFIED			TTL		5 V		Other Microprocessor ICs	2.54 mm	R-CDIP-T40		Not Qualified		12
SN54LS612FK	Texas Instruments	PARALLEL IO PORT, GENERAL PURPOSE	MILITARY	NO LEAD	44	QCCN	SQUARE	CERAMIC, METAL-SEALED COFIRED	YES	5.5 V					CHIP CARRIER		4.5 V	125 Cel		-55 Cel		QUAD	1	2.03 mm	16.51 mm					16.51 mm		TTL		5 V			1.27 mm	S-CQCC-N44		Not Qualified		12
SBP9960EJ	Texas Instruments		INDUSTRIAL	THROUGH-HOLE	28	DIP	RECTANGULAR	CERAMIC	NO				1		IN-LINE	DIP28,.6		85 Cel		-40 Cel		DUAL										BIPOLAR				Parallel IO Port	2.54 mm	R-XDIP-T28		Not Qualified
SNC54S412J	Texas Instruments		MILITARY	THROUGH-HOLE	24	DIP	RECTANGULAR	CERAMIC	NO		MIL-STD-883 Class B (Modified)		8		IN-LINE	DIP24,.6		125 Cel		-55 Cel		DUAL						NOT SPECIFIED	NOT SPECIFIED			CMOS				Parallel IO Port	2.54 mm	R-XDIP-T24		Not Qualified
SN74S412N	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
TCA7408ZSZR	Texas Instruments	PARALLEL IO PORT, GENERAL PURPOSE	INDUSTRIAL	BALL	16	VFBGA	SQUARE	PLASTIC/EPOXY	YES	5.5 V			8	1.8/5	GRID ARRAY, VERY THIN PROFILE, FINE PITCH	BGA16,4X4,20	1.65 V	85 Cel		-40 Cel		BOTTOM	1	.55 mm	2 mm		.4 MHz	30	260	2 mm		CMOS	.02 mA	1.8 V		Parallel IO Ports	.5 mm	S-PBGA-B16	2	Not Qualified		8
TIM8212N	Texas Instruments		COMMERCIAL	THROUGH-HOLE	24	DIP	RECTANGULAR	PLASTIC/EPOXY	NO				8		IN-LINE	DIP24,.6		70 Cel		0 Cel		DUAL										BIPOLAR				Parallel IO Port	2.54 mm	R-PDIP-T24		Not Qualified
LM8323GGR8	Texas Instruments	PARALLEL IO PORT, GENERAL PURPOSE	INDUSTRIAL	BALL	36	TFBGA	SQUARE	PLASTIC/EPOXY	YES	1.98 V					GRID ARRAY, THIN PROFILE, FINE PITCH		1.62 V	85 Cel		-40 Cel		BOTTOM	1	1.1 mm	3.5 mm					3.5 mm		CMOS		1.9 V			.5 mm	S-PBGA-B36				16
NSC810AN-4I	Texas Instruments		INDUSTRIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	PLASTIC/EPOXY	NO				16	5	IN-LINE	DIP40,.6		85 Cel	NSC800	-40 Cel		DUAL	3								2	CMOS	10 mA	5 V	128X8	Parallel IO Port	2.54 mm	R-PDIP-T40		Not Qualified
SN74S412D3	Texas Instruments		COMMERCIAL	GULL WING	24	SOP	RECTANGULAR	PLASTIC/EPOXY	YES				8		SMALL OUTLINE	SOP24,.4		70 Cel		0 Cel		DUAL						NOT SPECIFIED	NOT SPECIFIED			CMOS				Parallel IO Port	1.27 mm	R-PDSO-G24
SN54LS611FK	Texas Instruments	PARALLEL IO PORT, GENERAL PURPOSE	MILITARY	NO LEAD	44	QCCN	SQUARE	CERAMIC, METAL-SEALED COFIRED	YES	5.5 V					CHIP CARRIER		4.5 V	125 Cel		-55 Cel		QUAD	1	2.03 mm	16.51 mm					16.51 mm		TTL		5 V			1.27 mm	S-CQCC-N44		Not Qualified		12
SNJ54LS611JD	Texas Instruments	PARALLEL IO PORT, GENERAL PURPOSE	MILITARY	THROUGH-HOLE	40	DIP	RECTANGULAR	CERAMIC, METAL-SEALED COFIRED	NO	5.5 V	38535Q/M;38534H;883B				IN-LINE	DIP40,.6	4.5 V	125 Cel		-55 Cel		DUAL	1					NOT SPECIFIED	NOT SPECIFIED			TTL		5 V		Other Microprocessor ICs	2.54 mm	R-CDIP-T40		Not Qualified		12
LM8322GGR8	Texas Instruments	PARALLEL IO PORT, GENERAL PURPOSE	INDUSTRIAL	BALL	36	TFBGA	SQUARE	PLASTIC/EPOXY	YES	1.98 V					GRID ARRAY, THIN PROFILE, FINE PITCH		1.62 V	85 Cel		-40 Cel		BOTTOM	1	1.1 mm	3.5 mm					3.5 mm		CMOS		1.9 V			.5 mm	S-PBGA-B36				16
SNJ54LS611FK	Texas Instruments	PARALLEL IO PORT, GENERAL PURPOSE	MILITARY	NO LEAD	44	QCCN	SQUARE	CERAMIC, METAL-SEALED COFIRED	YES	5.5 V					CHIP CARRIER		4.5 V	125 Cel		-55 Cel		QUAD	1	2.03 mm	16.51 mm					16.51 mm		TTL		5 V			1.27 mm	S-CQCC-N44		Not Qualified		12
SN74LS613FN	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
SN74LS610FN	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
SN74S412JP4	Texas Instruments		COMMERCIAL	THROUGH-HOLE	24	DIP	RECTANGULAR	CERAMIC	NO				8		IN-LINE	DIP24,.6		70 Cel		0 Cel		DUAL						NOT SPECIFIED	NOT SPECIFIED			CMOS				Parallel IO Port	2.54 mm	R-XDIP-T24
SN54LS613JD	Texas Instruments	PARALLEL IO PORT, GENERAL PURPOSE	MILITARY	THROUGH-HOLE	40	DIP	RECTANGULAR	CERAMIC, METAL-SEALED COFIRED	NO	5.5 V					IN-LINE	DIP40,.6	4.5 V	125 Cel		-55 Cel		DUAL	1					NOT SPECIFIED	NOT SPECIFIED			TTL		5 V		Other Microprocessor ICs	2.54 mm	R-CDIP-T40		Not Qualified		12
SNJ54LS610FK	Texas Instruments	PARALLEL IO PORT, GENERAL PURPOSE	MILITARY	NO LEAD	44	QCCN	SQUARE	CERAMIC, METAL-SEALED COFIRED	YES	5.5 V					CHIP CARRIER		4.5 V	125 Cel		-55 Cel		QUAD	1	2.03 mm	16.51 mm					16.51 mm		TTL		5 V			1.27 mm	S-CQCC-N44		Not Qualified		12
NSC810AD/883	Texas Instruments		MILITARY	THROUGH-HOLE	40	DIP	RECTANGULAR	CERAMIC	NO		38535Q/M;38534H;883B		16	5	IN-LINE	DIP40,.6		125 Cel	NSC800	-55 Cel		DUAL	3								2	CMOS	10 mA	5 V	128X8	Parallel IO Port	2.54 mm	R-XDIP-T40		Not Qualified
SN74LS613N	Texas Instruments	PARALLEL IO PORT, GENERAL PURPOSE	COMMERCIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	5.25 V					IN-LINE	DIP40,.6	4.75 V	70 Cel		0 Cel		DUAL	1	5.08 mm	15.24 mm			NOT SPECIFIED	NOT SPECIFIED	52.455 mm		CMOS		5 V		Other Microprocessor ICs	2.54 mm	R-PDIP-T40		Not Qualified		12
SBP9960CJ	Texas Instruments		COMMERCIAL	THROUGH-HOLE	28	DIP	RECTANGULAR	CERAMIC	NO				1		IN-LINE	DIP28,.6		70 Cel		0 Cel		DUAL										BIPOLAR				Parallel IO Port	2.54 mm	R-XDIP-T28		Not Qualified
NSC810AD-4I	Texas Instruments		INDUSTRIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	CERAMIC	NO				16	5	IN-LINE	DIP40,.6		85 Cel	NSC800	-40 Cel		DUAL	3								2	CMOS	10 mA	5 V	128X8	Parallel IO Port	2.54 mm	R-XDIP-T40		Not Qualified
SN54LS613FK	Texas Instruments	PARALLEL IO PORT, GENERAL PURPOSE	MILITARY	NO LEAD	44	QCCN	SQUARE	CERAMIC, METAL-SEALED COFIRED	YES	5.5 V					CHIP CARRIER		4.5 V	125 Cel		-55 Cel		QUAD	1	2.03 mm	16.51 mm					16.51 mm		TTL		5 V			1.27 mm	S-CQCC-N44		Not Qualified		12
SN74LS611N	Texas Instruments	PARALLEL IO PORT, GENERAL PURPOSE	COMMERCIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	5.25 V					IN-LINE	DIP40,.6	4.75 V	70 Cel		0 Cel		DUAL	1	5.08 mm	15.24 mm			NOT SPECIFIED	NOT SPECIFIED	52.455 mm		CMOS		5 V		Other Microprocessor ICs	2.54 mm	R-PDIP-T40		Not Qualified		12
SN74S412NP3	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
TCA1116RTWR	Texas Instruments	PARALLEL IO PORT, PRINTER INTERFACE	INDUSTRIAL	NO LEAD	24	HVQCCN	SQUARE	PLASTIC/EPOXY	YES	5.5 V			16		CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE		1.65 V	85 Cel		-40 Cel	NICKEL PALLADIUM GOLD	QUAD	1	.8 mm	4 mm		.4 MHz	30	260	4 mm		CMOS					.5 mm	S-PQCC-N24	1		e4	16
SN54LS611JD	Texas Instruments	PARALLEL IO PORT, GENERAL PURPOSE	MILITARY	THROUGH-HOLE	40	DIP	RECTANGULAR	CERAMIC, METAL-SEALED COFIRED	NO	5.5 V					IN-LINE	DIP40,.6	4.5 V	125 Cel		-55 Cel		DUAL	1					NOT SPECIFIED	NOT SPECIFIED			TTL		5 V		Other Microprocessor ICs	2.54 mm	R-CDIP-T40		Not Qualified		12
TIM8212J	Texas Instruments		COMMERCIAL	THROUGH-HOLE	24	DIP	RECTANGULAR	CERAMIC	NO				8		IN-LINE	DIP24,.6		70 Cel		0 Cel		DUAL										BIPOLAR				Parallel IO Port	2.54 mm	R-XDIP-T24		Not Qualified
SN54LS610JD	Texas Instruments	PARALLEL IO PORT, GENERAL PURPOSE	MILITARY	THROUGH-HOLE	40	DIP	RECTANGULAR	CERAMIC, METAL-SEALED COFIRED	NO	5.5 V					IN-LINE	DIP40,.6	4.5 V	125 Cel		-55 Cel		DUAL	1					NOT SPECIFIED	NOT SPECIFIED			CMOS		5 V		Other Microprocessor ICs	2.54 mm	R-CDIP-T40		Not Qualified		12
TCAL6408DTUR	Texas Instruments	PARALLEL IO PORT, GENERAL PURPOSE		NO LEAD	16		SQUARE	UNSPECIFIED	YES	3.6 V		2	8				1.08 V	125 Cel		-40 Cel	NICKEL PALLADIUM GOLD	BOTTOM	8			0	1 MHz		260			CMOS						S-XBGA-N16	1		e4	8
TCAL6416PWR	Texas Instruments	PARALLEL IO PORT, GENERAL PURPOSE		GULL WING	24	TSSOP	RECTANGULAR	PLASTIC/EPOXY	YES	3.6 V			16		SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	TSSOP24,.25	1.08 V	125 Cel		-40 Cel		QUAD	16	1.2 mm	4.4 mm	0	1 MHz			7.8 mm		CMOS					.65 mm	R-PDSO-G24				16
PCF8575DGVRG4	Texas Instruments	PARALLEL IO PORT, GENERAL PURPOSE	INDUSTRIAL	GULL WING	24	TSSOP	RECTANGULAR	PLASTIC/EPOXY	YES	5.5 V		8	16	3/5	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	TSSOP24,.25,16	2.5 V	85 Cel		-40 Cel	Nickel/Palladium/Gold (Ni/Pd/Au)	DUAL	2	1.2 mm	4.4 mm		.4 MHz	NOT SPECIFIED	260	5 mm		CMOS	.2 mA	3.3 V		Parallel IO Ports	.4 mm	R-PDSO-G24	1	Not Qualified	e4	16
PCA9534ADGVT	Texas Instruments	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		DUAL	1	1.2 mm	3.6 mm					4.4 mm		CMOS		5 V			.4 mm	R-PDSO-G16		Not Qualified		8
PCA9554ADB	Texas Instruments	PARALLEL IO PORT, GENERAL PURPOSE	INDUSTRIAL	GULL WING	16	SSOP	RECTANGULAR	PLASTIC/EPOXY	YES	5.5 V		8	8	2.5/5	SMALL OUTLINE, SHRINK PITCH	SSOP16,.3	2.3 V	85 Cel		-40 Cel	Nickel/Palladium/Gold (Ni/Pd/Au)	DUAL	1	2 mm	5.3 mm		.4 MHz	NOT SPECIFIED	260	6.2 mm		CMOS	.175 mA	5 V		Parallel IO Ports	.65 mm	R-PDSO-G16	1	Not Qualified	e4	8
PCA9538DWRG4	Texas Instruments	PARALLEL IO PORT, GENERAL PURPOSE	INDUSTRIAL	GULL WING	16	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	5.5 V			8	2.5/5	SMALL OUTLINE	SOP16,.4	2.3 V	85 Cel		-40 Cel	NICKEL PALLADIUM GOLD	DUAL	1	2.65 mm	7.5 mm			30	260	10.3 mm		CMOS		2.5 V		Parallel IO Ports	1.27 mm	R-PDSO-G16	1	Not Qualified	e4	8
PCA9534ADW	Texas Instruments	PARALLEL IO PORT, GENERAL PURPOSE	INDUSTRIAL	GULL WING	16	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	5.5 V		8	8	2.5/5	SMALL OUTLINE	SOP16,.4	2.3 V	85 Cel		-40 Cel	Nickel/Palladium/Gold (Ni/Pd/Au)	DUAL	1	2.65 mm	7.5 mm		.4 MHz	NOT SPECIFIED	260	10.3 mm		CMOS	.175 mA	5 V		Parallel IO Port	1.27 mm	R-PDSO-G16	1	Not Qualified	e4	8
PCA9535DWT	Texas Instruments	PARALLEL IO PORT, GENERAL PURPOSE	INDUSTRIAL	GULL WING	24	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	5.5 V			16	2.5/5	SMALL OUTLINE	SOP24,.4	2.3 V	85 Cel		-40 Cel		DUAL	2	2.65 mm	7.5 mm					15.4 mm		CMOS		3 V		Parallel IO Port	1.27 mm	R-PDSO-G24		Not Qualified		16
PCA9534ARGVT	Texas Instruments	PARALLEL IO PORT, GENERAL PURPOSE	INDUSTRIAL	NO LEAD	16	HVQCCN	SQUARE	PLASTIC/EPOXY	YES	5.5 V					CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE		2.3 V	85 Cel		-40 Cel		QUAD	1	1 mm	4 mm					4 mm		CMOS		5 V			.65 mm	R-PQCC-N16		Not Qualified		8
PCA9534ADGVR	Texas Instruments	PARALLEL IO PORT, GENERAL PURPOSE	INDUSTRIAL	GULL WING	16	TSSOP	RECTANGULAR	PLASTIC/EPOXY	YES	5.5 V		8	8	2.5/5	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	TSSOP16,.25,16	2.3 V	85 Cel		-40 Cel	NICKEL PALLADIUM GOLD	DUAL	1	1.2 mm	3.6 mm		.4 MHz	30	260	4.4 mm		CMOS	.175 mA	5 V		Parallel IO Port	.4 mm	R-PDSO-G16	1	Not Qualified	e4	8
PCA9534APWT	Texas Instruments	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		DUAL	1	1.2 mm	4.4 mm					5 mm		CMOS		5 V			.65 mm	R-PDSO-G16		Not Qualified		8
PCA9557DGVRG4G4	Texas Instruments	PARALLEL IO PORT, GENERAL PURPOSE	INDUSTRIAL	GULL WING	16	TSSOP	RECTANGULAR	PLASTIC/EPOXY	YES	5.5 V			8	2.5/5	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	TSSOP16,.25,16	2.3 V	85 Cel		-40 Cel	NICKEL PALLADIUM GOLD	DUAL	1	1.2 mm	3.6 mm			30	260	4.4 mm		CMOS		2.5 V		Parallel IO Ports	.4 mm	R-PDSO-G16	1	Not Qualified	e4	8
PCA9534DBQR	Texas Instruments	PARALLEL IO PORT, GENERAL PURPOSE	INDUSTRIAL	GULL WING	16	SSOP	RECTANGULAR	PLASTIC/EPOXY	YES	5.5 V			8	2.5/5	SMALL OUTLINE, SHRINK PITCH	SSOP16,.25	2.3 V	85 Cel		-40 Cel		DUAL	1	1.75 mm	3.9 mm					4.9 mm		CMOS		5 V		Parallel IO Port	.635 mm	R-PDSO-G16		Not Qualified		8
PCA9554DWT	Texas Instruments	PARALLEL IO PORT, GENERAL PURPOSE	INDUSTRIAL	GULL WING	16	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	5.5 V			8	2.5/5	SMALL OUTLINE	SOP16,.4	2.3 V	85 Cel		-40 Cel		DUAL	1									CMOS		3 V		Parallel IO Port	1.27 mm	R-PDSO-G16		Not Qualified		8
PCA9539DWG4	Texas Instruments	PARALLEL IO PORT, GENERAL PURPOSE	INDUSTRIAL	GULL WING	24	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	5.5 V			16	2.5/5	SMALL OUTLINE	SOP24,.4	2.3 V	85 Cel		-40 Cel	NICKEL PALLADIUM GOLD	DUAL	2	2.65 mm	7.5 mm		.4 MHz	30	260	15.4 mm		CMOS	.2 mA	3 V		Parallel IO Port	1.27 mm	R-PDSO-G24	1	Not Qualified	e4	16
PCA9554ARGVRG4	Texas Instruments	PARALLEL IO PORT, GENERAL PURPOSE	INDUSTRIAL	NO LEAD	16	HVQCCN	SQUARE	PLASTIC/EPOXY	YES	5.5 V			8	2.5/5	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	LCC16,.16SQ,25	2.3 V	85 Cel		-40 Cel	NICKEL PALLADIUM GOLD	QUAD	1	1 mm	4 mm			30	260	4 mm		CMOS		5 V		Parallel IO Ports	.65 mm	S-PQCC-N16	2	Not Qualified	e4	8
PCA9534RGVT	Texas Instruments	PARALLEL IO PORT, GENERAL PURPOSE	INDUSTRIAL	NO LEAD	16	VQCCN	SQUARE	PLASTIC/EPOXY	YES	5.5 V					CHIP CARRIER, VERY THIN PROFILE		2.3 V	85 Cel		-40 Cel		QUAD	1	1 mm	4 mm					4 mm		CMOS		5 V			.65 mm	S-PQCC-N16		Not Qualified		8
PCA9534DGVT	Texas Instruments	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		DUAL	1	1.2 mm	3.6 mm					4.4 mm		CMOS		5 V			.4 mm	S-PDSO-G16		Not Qualified		8

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.