INDUSTRIAL Parallel I/O Ports 2,400+

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Part RoHS 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 Bit Size 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 ROM Words Width Additional Features External Data Bus Width Maximum Clock Frequency Maximum Time At Peak Reflow Temperature (s) Peak Reflow Temperature (C) Length Total Dose (V) ROM Bits Size No. of Timers RAM Bytes Technology Maximum Supply Current Nominal Supply Voltage Memory Organization Sub-Category ROM Programmability Terminal Pitch JESD-30 Code Moisture Sensitivity Level (MSL) Qualification Speed JESD-609 Code Maximum Standby Current No. of I/O Lines Maximum Access Time

935280568118

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

2

2.65 mm

7.5 mm

15.4 mm

CMOS

3 V

1.27 mm

R-PDSO-G24

16

935283489512

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

935273945118

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

2

2.65 mm

7.5 mm

15.4 mm

CMOS

3 V

1.27 mm

R-PDSO-G24

16

935283554118

NXP Semiconductors

PARALLEL IO PORT, GENERAL PURPOSE

INDUSTRIAL

GULL WING

24

TSSOP

RECTANGULAR

PLASTIC/EPOXY

YES

5.5 V

SMALL OUTLINE, THIN PROFILE, SHRINK PITCH

2.3 V

85 Cel

-40 Cel

DUAL

1

1.1 mm

4.4 mm

7.8 mm

CMOS

3 V

.65 mm

R-PDSO-G24

16

935282742112

NXP Semiconductors

PARALLEL IO PORT, GENERAL PURPOSE

INDUSTRIAL

THROUGH-HOLE

16

DIP

RECTANGULAR

PLASTIC/EPOXY

NO

5.5 V

IN-LINE

2.3 V

85 Cel

-40 Cel

DUAL

1

4.7 mm

7.62 mm

21.6 mm

CMOS

3 V

2.54 mm

R-PDIP-T16

8

935084790518

NXP Semiconductors

PARALLEL IO PORT, GENERAL PURPOSE

INDUSTRIAL

GULL WING

20

LSSOP

RECTANGULAR

PLASTIC/EPOXY

YES

6 V

SMALL OUTLINE, LOW PROFILE, SHRINK PITCH

2.5 V

85 Cel

-40 Cel

DUAL

1

1.5 mm

4.4 mm

6.5 mm

CMOS

5 V

.65 mm

R-PDSO-G20

8

935282747112

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

DUAL

1

1.1 mm

4.4 mm

5 mm

CMOS

3 V

.65 mm

R-PDSO-G16

8

935269569112

NXP Semiconductors

PARALLEL IO PORT, GENERAL PURPOSE

INDUSTRIAL

GULL WING

24

TSSOP

RECTANGULAR

PLASTIC/EPOXY

YES

5.5 V

SMALL OUTLINE, THIN PROFILE, SHRINK PITCH

2.3 V

85 Cel

-40 Cel

NICKEL PALLADIUM GOLD

DUAL

2

1.1 mm

4.4 mm

7.8 mm

CMOS

3 V

.65 mm

R-PDSO-G24

1

Not Qualified

e4

16

935283555118

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

1.27 mm

R-PDSO-G24

18

935282744112

NXP Semiconductors

PARALLEL IO PORT, GENERAL PURPOSE

INDUSTRIAL

GULL WING

20

LSSOP

RECTANGULAR

PLASTIC/EPOXY

YES

5.5 V

SMALL OUTLINE, LOW PROFILE, SHRINK PITCH

2.3 V

85 Cel

-40 Cel

DUAL

1

1.5 mm

4.4 mm

6.5 mm

CMOS

3 V

.65 mm

R-PDSO-G20

8

935277296118

NXP Semiconductors

PARALLEL IO PORT, GENERAL PURPOSE

INDUSTRIAL

NO LEAD

24

HVQCCN

SQUARE

PLASTIC/EPOXY

YES

5.5 V

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

2.3 V

85 Cel

-40 Cel

QUAD

2

1 mm

4 mm

4 mm

CMOS

3 V

.5 mm

S-PQCC-N24

16

935283552118

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

3 V

.65 mm

R-PDSO-G24

16

935282746512

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

935272003115

NXP Semiconductors

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

3 V

.65 mm

S-PQCC-N16

8

935283217118

NXP Semiconductors

PARALLEL IO PORT, GENERAL PURPOSE

INDUSTRIAL

NO LEAD

8

VSON

SQUARE

PLASTIC/EPOXY

YES

5.5 V

SMALL OUTLINE, VERY THIN PROFILE

2.3 V

85 Cel

-40 Cel

NICKEL PALLADIUM GOLD

DUAL

1

1 mm

3 mm

30

260

3 mm

CMOS

3 V

.5 mm

S-PDSO-N8

1

e4

4

935283369118

NXP Semiconductors

PARALLEL IO PORT, GENERAL PURPOSE

INDUSTRIAL

NO LEAD

24

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

3 V

.5 mm

S-PQCC-N24

16

935285896118

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

DUAL

1

1.1 mm

4.4 mm

5 mm

CMOS

3 V

.65 mm

R-PDSO-G16

8

935273813118

NXP Semiconductors

PARALLEL IO PORT, GENERAL PURPOSE

INDUSTRIAL

NO LEAD

20

HVQCCN

SQUARE

PLASTIC/EPOXY

YES

3.6 V

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

2.5 V

85 Cel

-40 Cel

QUAD

1

1 mm

5 mm

5 mm

CMOS

3.3 V

.65 mm

S-PQCC-N20

8

935269567118

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

NICKEL PALLADIUM GOLD

DUAL

2

2.65 mm

7.5 mm

15.4 mm

CMOS

3 V

1.27 mm

R-PDSO-G24

1

Not Qualified

e4

16

935278326112

NXP Semiconductors

PARALLEL IO PORT, GENERAL PURPOSE

INDUSTRIAL

GULL WING

24

SSOP

RECTANGULAR

PLASTIC/EPOXY

YES

5.5 V

SMALL OUTLINE, SHRINK PITCH

2.5 V

85 Cel

-40 Cel

DUAL

2

2 mm

5.3 mm

8.2 mm

CMOS

2.7 V

.65 mm

R-PDSO-G24

16

935283503112

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

935084790512

NXP Semiconductors

PARALLEL IO PORT, GENERAL PURPOSE

INDUSTRIAL

GULL WING

20

LSSOP

RECTANGULAR

PLASTIC/EPOXY

YES

6 V

SMALL OUTLINE, LOW PROFILE, SHRINK PITCH

2.5 V

85 Cel

-40 Cel

DUAL

1

1.5 mm

4.4 mm

6.5 mm

CMOS

5 V

.65 mm

R-PDSO-G20

8

935283489112

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

935277415112

NXP Semiconductors

PARALLEL IO PORT, GENERAL PURPOSE

INDUSTRIAL

GULL WING

8

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

4.9 mm

CMOS

3 V

1.27 mm

R-PDSO-G8

4

933728080112

NXP Semiconductors

PARALLEL IO PORT, GENERAL PURPOSE

INDUSTRIAL

GULL WING

16

SOP

RECTANGULAR

PLASTIC/EPOXY

YES

6 V

SMALL OUTLINE

2.5 V

85 Cel

-40 Cel

DUAL

1

2.65 mm

7.5 mm

NOT SPECIFIED

NOT SPECIFIED

10.3 mm

CMOS

5 V

1.27 mm

R-PDSO-G16

Not Qualified

8

935284486118

NXP Semiconductors

PARALLEL IO PORT, GENERAL PURPOSE

INDUSTRIAL

GULL WING

56

TSSOP

RECTANGULAR

PLASTIC/EPOXY

YES

5.5 V

SMALL OUTLINE, THIN PROFILE, SHRINK PITCH

2.3 V

85 Cel

-40 Cel

NICKEL PALLADIUM GOLD

DUAL

2

1.2 mm

6.1 mm

30

260

14 mm

CMOS

3.3 V

.5 mm

R-PDSO-G56

1

e4

8

935277802118

NXP Semiconductors

PARALLEL IO PORT, GENERAL PURPOSE

INDUSTRIAL

GULL WING

24

TSSOP

RECTANGULAR

PLASTIC/EPOXY

YES

5.5 V

SMALL OUTLINE, THIN PROFILE, SHRINK PITCH

2.3 V

85 Cel

-40 Cel

DUAL

2

1.1 mm

4.4 mm

7.8 mm

CMOS

3 V

.65 mm

R-PDSO-G24

16

935276772118

NXP Semiconductors

PARALLEL IO PORT, GENERAL PURPOSE

INDUSTRIAL

GULL WING

20

LSSOP

RECTANGULAR

PLASTIC/EPOXY

YES

5.5 V

SMALL OUTLINE, LOW PROFILE, SHRINK PITCH

2.3 V

85 Cel

-40 Cel

DUAL

1

1.5 mm

4.4 mm

6.5 mm

CMOS

3 V

.65 mm

R-PDSO-G20

8

935276427118

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

DUAL

1

1.1 mm

4.4 mm

5 mm

CMOS

.65 mm

R-PDSO-G16

8

935271534112

NXP Semiconductors

PARALLEL IO PORT, GENERAL PURPOSE

INDUSTRIAL

GULL WING

16

TSSOP

RECTANGULAR

PLASTIC/EPOXY

YES

3.6 V

SMALL OUTLINE, THIN PROFILE, SHRINK PITCH

2.5 V

85 Cel

-40 Cel

NICKEL PALLADIUM GOLD

DUAL

1

1.1 mm

4.4 mm

5 mm

CMOS

3.3 V

.65 mm

R-PDSO-G16

1

Not Qualified

e4

8

935279918118

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

DUAL

1

2 mm

5.3 mm

6.2 mm

CMOS

3 V

.65 mm

R-PDSO-G16

8

935263529118

NXP Semiconductors

PARALLEL IO PORT, GENERAL PURPOSE

INDUSTRIAL

GULL WING

24

SSOP

RECTANGULAR

PLASTIC/EPOXY

YES

5.5 V

SMALL OUTLINE, SHRINK PITCH

4.5 V

85 Cel

-40 Cel

DUAL

2

2 mm

5.3 mm

8.2 mm

CMOS

5 V

.65 mm

R-PDSO-G24

16

935283188112

NXP Semiconductors

PARALLEL IO PORT, GENERAL PURPOSE

INDUSTRIAL

THROUGH-HOLE

16

DIP

RECTANGULAR

PLASTIC/EPOXY

NO

5.5 V

IN-LINE

2.3 V

85 Cel

-40 Cel

DUAL

1

4.7 mm

7.62 mm

21.6 mm

CMOS

3 V

2.54 mm

R-PDIP-T16

8

935281363128

NXP Semiconductors

PARALLEL IO PORT, GENERAL PURPOSE

INDUSTRIAL

NO LEAD

24

HVQCCN

SQUARE

PLASTIC/EPOXY

YES

2.7 V

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

2.3 V

85 Cel

-40 Cel

NICKEL PALLADIUM GOLD

QUAD

1

1 mm

4 mm

IT ALSO OPERATES AT 3.3V SUPPLY

30

260

4 mm

CMOS

2.5 V

.5 mm

S-PQCC-N24

1

e4

8

935283551112

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

935277419112

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

DUAL

1

1.1 mm

4.4 mm

5 mm

CMOS

3 V

.65 mm

R-PDSO-G16

8

935283492112

NXP Semiconductors

PARALLEL IO PORT, GENERAL PURPOSE

INDUSTRIAL

THROUGH-HOLE

16

DIP

RECTANGULAR

PLASTIC/EPOXY

NO

5.5 V

IN-LINE

2.3 V

85 Cel

-40 Cel

DUAL

1

4.7 mm

7.62 mm

21.6 mm

CMOS

3 V

2.54 mm

R-PDIP-T16

8

935278586118

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

DUAL

1

1.1 mm

4.4 mm

5 mm

CMOS

3 V

.65 mm

R-PDSO-G16

8

935271533112

NXP Semiconductors

PARALLEL IO PORT, GENERAL PURPOSE

INDUSTRIAL

GULL WING

16

SOP

RECTANGULAR

PLASTIC/EPOXY

YES

3.6 V

SMALL OUTLINE

2.5 V

85 Cel

-40 Cel

NICKEL PALLADIUM GOLD

DUAL

1

2.65 mm

7.5 mm

10.3 mm

CMOS

3.3 V

1.27 mm

R-PDSO-G16

1

Not Qualified

e4

8

935276424118

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

DUAL

1

1.1 mm

4.4 mm

5 mm

CMOS

3 V

.65 mm

R-PDSO-G16

8

935283507118

NXP Semiconductors

PARALLEL IO PORT, GENERAL PURPOSE

INDUSTRIAL

NO LEAD

24

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 mm

S-PQCC-N24

18

935278613118

NXP Semiconductors

PARALLEL IO PORT, GENERAL PURPOSE

INDUSTRIAL

NO LEAD

56

HVQCCN

SQUARE

PLASTIC/EPOXY

YES

5.5 V

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

2.3 V

85 Cel

-40 Cel

QUAD

2

1 mm

8 mm

8 mm

CMOS

3.3 V

.5 mm

S-PQCC-N56

8

935281363151

NXP Semiconductors

PARALLEL IO PORT, GENERAL PURPOSE

INDUSTRIAL

NO LEAD

24

HVQCCN

SQUARE

PLASTIC/EPOXY

YES

2.7 V

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

2.3 V

85 Cel

-40 Cel

NICKEL PALLADIUM GOLD

QUAD

1

1 mm

4 mm

IT ALSO OPERATES AT 3.3V SUPPLY

30

260

4 mm

CMOS

2.5 V

.5 mm

S-PQCC-N24

1

e4

8

935283759118

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

DUAL

1

1.1 mm

4.4 mm

5 mm

CMOS

3 V

.65 mm

R-PDSO-G16

8

935277419118

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

DUAL

1

1.1 mm

4.4 mm

5 mm

CMOS

3 V

.65 mm

R-PDSO-G16

8

935277418112

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

933728080118

NXP Semiconductors

PARALLEL IO PORT, GENERAL PURPOSE

INDUSTRIAL

GULL WING

16

SOP

RECTANGULAR

PLASTIC/EPOXY

YES

6 V

SMALL OUTLINE

2.5 V

85 Cel

-40 Cel

DUAL

1

2.65 mm

7.5 mm

NOT SPECIFIED

NOT SPECIFIED

10.3 mm

CMOS

5 V

1.27 mm

R-PDSO-G16

Not Qualified

8

935286939118

NXP Semiconductors

PARALLEL IO PORT, GENERAL PURPOSE

INDUSTRIAL

GULL WING

24

TSSOP

RECTANGULAR

PLASTIC/EPOXY

YES

5.5 V

SMALL OUTLINE, THIN PROFILE, SHRINK PITCH

2.3 V

85 Cel

-40 Cel

DUAL

2

1.1 mm

4.4 mm

7.8 mm

CMOS

3 V

.65 mm

R-PDSO-G24

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.