32 Other Function Telecom Interface ICs 507

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Part RoHS Manufacturer Telecom IC Type Temperature Grade Terminal Form No. of Terminals Package Code Package Shape Total Dose (V) Package Body Material Applications Surface Mount No. of Functions Output Code No. of Channels Technology Screening Level Nominal Negative Supply Voltage No. of Transceivers Maximum Supply Current Nominal Supply Voltage Hybrid Input Code Power Supplies (V) ISDN Access Rate Package Style (Meter) Package Equivalence Code Sub-Category Carrier Type-3 Terminal Pitch Maximum Operating Temperature Resolution (um) Battery Supply (V) Minimum Output High Voltage Maximum Output Low Voltage Standard Minimum Operating Temperature Maximum Gain Tolerance Terminal Finish Maximum Output Voltage Terminal Position Data Rate JESD-30 Code Reference Point Output (V) Moisture Sensitivity Level (MSL) Maximum Seated Height Linear Coding Carrier Type-2 Carrier Type-1 Width Qualification Maximum Output Low Current Companding Law Input Type Additional Features Battery Feed Maximum Analog Input JESD-609 Code Maximum Time At Peak Reflow Temperature (s) Peak Reflow Temperature (C) Length Filter

TRF7970ARHB

Texas Instruments

TELECOM CIRCUIT

INDUSTRIAL

NO LEAD

32

HVQCCN

SQUARE

PLASTIC/EPOXY

YES

1

CMOS

5 V

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

.5 mm

110 Cel

-40 Cel

QUAD

S-PQCC-N32

1 mm

5 mm

5 mm

CC2640F128RHB

Texas Instruments

TELECOM CIRCUIT

INDUSTRIAL

NO LEAD

32

HVQCCN

SQUARE

PLASTIC/EPOXY

YES

1

3 V

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

.5 mm

85 Cel

-40 Cel

NICKEL PALLADIUM GOLD

QUAD

S-PQCC-N32

3

1 mm

5 mm

e4

5 mm

CC1120RHMR

Texas Instruments

TELECOM CIRCUIT

INDUSTRIAL

NO LEAD

32

HVQCCN

SQUARE

PLASTIC/EPOXY

YES

1

3 V

3

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

LCC32,.2SQ,20

Other Telecom ICs

.5 mm

85 Cel

-40 Cel

NICKEL PALLADIUM GOLD

QUAD

S-PQCC-N32

3

.9 mm

5 mm

Not Qualified

e4

30

260

5 mm

TSC2200IRHBG4

Texas Instruments

TELECOM CIRCUIT

INDUSTRIAL

NO LEAD

32

HVQCCN

SQUARE

PLASTIC/EPOXY

YES

1

2.7 V

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

.5 mm

85 Cel

-40 Cel

NICKEL PALLADIUM GOLD

QUAD

S-PQCC-N32

2

1 mm

5 mm

Not Qualified

e4

30

260

5 mm

CC1120RHMT

Texas Instruments

TELECOM CIRCUIT

INDUSTRIAL

NO LEAD

32

HVQCCN

SQUARE

PLASTIC/EPOXY

YES

1

3 V

3

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

LCC32,.2SQ,20

Other Telecom ICs

.5 mm

85 Cel

-40 Cel

NICKEL PALLADIUM GOLD

QUAD

S-PQCC-N32

3

.9 mm

5 mm

Not Qualified

e4

30

260

5 mm

CC1121RHMT

Texas Instruments

TELECOM CIRCUIT

INDUSTRIAL

NO LEAD

32

HVQCCN

SQUARE

PLASTIC/EPOXY

YES

1

3 V

3

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

LCC32,.2SQ,20

Other Telecom ICs

.5 mm

85 Cel

-40 Cel

NICKEL PALLADIUM GOLD

QUAD

S-PQCC-N32

3

.9 mm

5 mm

Not Qualified

e4

30

260

5 mm

ADF5901WCCPZ-RL7

Analog Devices

TELECOM CIRCUIT

INDUSTRIAL

NO LEAD

32

HVQCCN

SQUARE

UNSPECIFIED

YES

1

AEC-Q100

3.3 V

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

LCC32,.2SQ,20

.5 mm

105 Cel

-40 Cel

MATTE TIN

QUAD

S-XQCC-N32

3

.8 mm

5 mm

e3

30

260

5 mm

ADF5901WCCPZ

Analog Devices

TELECOM CIRCUIT

INDUSTRIAL

NO LEAD

32

HVQCCN

SQUARE

UNSPECIFIED

YES

1

AEC-Q100

3.3 V

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

LCC32,.2SQ,20

.5 mm

105 Cel

-40 Cel

MATTE TIN

QUAD

S-XQCC-N32

3

.8 mm

5 mm

e3

30

260

5 mm

HMC710LC5TR

Analog Devices

TELECOM CIRCUIT

OTHER

NO LEAD

32

HQCCN

SQUARE

UNSPECIFIED

YES

1

5 V

CHIP CARRIER, HEAT SINK/SLUG

.5 mm

85 Cel

-55 Cel

QUAD

S-XQCC-N32

1.12 mm

5 mm

5 mm

AD6121ACPRL7

Analog Devices

TELECOM CIRCUIT

INDUSTRIAL

NO LEAD

32

HVQCCN

SQUARE

UNSPECIFIED

YES

1

BICMOS

3 V

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

.5 mm

85 Cel

-40 Cel

QUAD

S-XQCC-N32

1 mm

5 mm

Not Qualified

5 mm

ADF5901ACPZ-RL7

Analog Devices

TELECOM CIRCUIT

INDUSTRIAL

NO LEAD

32

HVQCCN

SQUARE

UNSPECIFIED

YES

1

3.3 V

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

LCC32,.2SQ,20

.5 mm

105 Cel

-40 Cel

QUAD

S-XQCC-N32

3

.8 mm

5 mm

30

260

5 mm

ADF5904ACPZ-RL7

Analog Devices

TELECOM CIRCUIT

INDUSTRIAL

NO LEAD

32

HVQCCN

SQUARE

UNSPECIFIED

YES

1

3.3 V

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

.5 mm

105 Cel

-40 Cel

MATTE TIN

QUAD

S-XQCC-N32

3

.8 mm

5 mm

e3

30

260

5 mm

ADF5902WCCPZ-RL7

Analog Devices

TELECOM CIRCUIT

INDUSTRIAL

NO LEAD

32

HVQCCN

SQUARE

UNSPECIFIED

YES

1

AEC-Q100

3.3 V

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

.5 mm

105 Cel

-40 Cel

QUAD

S-XQCC-N32

3

.8 mm

5 mm

260

5 mm

ADF5901ACPZ

Analog Devices

TELECOM CIRCUIT

INDUSTRIAL

NO LEAD

32

HVQCCN

SQUARE

UNSPECIFIED

YES

1

3.3 V

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

LCC32,.2SQ,20

.5 mm

105 Cel

-40 Cel

QUAD

S-XQCC-N32

3

.8 mm

5 mm

30

260

5 mm

ADF5902WCCPZ

Analog Devices

TELECOM CIRCUIT

INDUSTRIAL

NO LEAD

32

HVQCCN

SQUARE

UNSPECIFIED

YES

1

AEC-Q100

3.3 V

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

.5 mm

105 Cel

-40 Cel

QUAD

S-XQCC-N32

3

.8 mm

5 mm

260

5 mm

LT5554IUH#TRPBF

Analog Devices

TELECOM CIRCUIT

INDUSTRIAL

NO LEAD

32

HVQCCN

SQUARE

PLASTIC/EPOXY

YES

1

5 V

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

.5 mm

85 Cel

-40 Cel

MATTE TIN

QUAD

S-PQCC-N32

1

.8 mm

5 mm

Not Qualified

e3

30

260

5 mm

HMC710LC5

Analog Devices

TELECOM CIRCUIT

OTHER

NO LEAD

32

HQCCN

SQUARE

UNSPECIFIED

YES

1

5 V

CHIP CARRIER, HEAT SINK/SLUG

.5 mm

85 Cel

-55 Cel

GOLD OVER NICKEL

QUAD

S-XQCC-N32

1.12 mm

5 mm

Not Qualified

e4

5 mm

AD6121ACP

Analog Devices

TELECOM CIRCUIT

INDUSTRIAL

NO LEAD

32

HVQCCN

SQUARE

UNSPECIFIED

YES

1

BICMOS

3 V

3

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

LCC32,.2SQ,20

Other Telecom ICs

.5 mm

85 Cel

-40 Cel

TIN LEAD

QUAD

S-XQCC-N32

1 mm

5 mm

Not Qualified

e0

5 mm

PHY1040-01QS-RE

Analog Devices

TELECOM CIRCUIT

INDUSTRIAL

NO LEAD

32

HVQCCN

SQUARE

UNSPECIFIED

YES

1

3.3 V

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

.5 mm

95 Cel

-40 Cel

QUAD

S-XQCC-N32

.95 mm

5 mm

5 mm

DS2172T/T&R+

Analog Devices

TELECOM CIRCUIT

COMMERCIAL

GULL WING

32

TQFP

SQUARE

PLASTIC/EPOXY

YES

1

5 V

FLATPACK, THIN PROFILE

.8 mm

70 Cel

0 Cel

Matte Tin (Sn) - annealed

QUAD

S-PQFP-G32

1

1.2 mm

7 mm

Not Qualified

e3

7 mm

MAX3799ETJ+

Analog Devices

TELECOM CIRCUIT

INDUSTRIAL

NO LEAD

32

HVQCCN

SQUARE

UNSPECIFIED

YES

1

BIPOLAR

3.3 V

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

.5 mm

85 Cel

-40 Cel

Matte Tin (Sn) - annealed

QUAD

S-XQCC-N32

1

.8 mm

5 mm

Not Qualified

e3

30

260

5 mm

PHY2078QT-RR

Analog Devices

TELECOM CIRCUIT

INDUSTRIAL

NO LEAD

32

HVQCCN

SQUARE

UNSPECIFIED

YES

1

3.3 V

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

.5 mm

95 Cel

-40 Cel

QUAD

S-XQCC-N32

.8 mm

5 mm

NOT SPECIFIED

NOT SPECIFIED

5 mm

PHY1078-01-QT-RR

Analog Devices

TELECOM CIRCUIT

INDUSTRIAL

NO LEAD

32

HVQCCN

SQUARE

UNSPECIFIED

YES

1

3.3 V

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

.5 mm

95 Cel

-40 Cel

QUAD

S-XQCC-N32

.8 mm

5 mm

5 mm

PHY1078-01QT-BR

Analog Devices

TELECOM CIRCUIT

INDUSTRIAL

NO LEAD

32

HVQCCN

SQUARE

UNSPECIFIED

YES

1

3.3 V

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

.5 mm

95 Cel

-40 Cel

QUAD

S-XQCC-N32

.8 mm

5 mm

NOT SPECIFIED

NOT SPECIFIED

5 mm

MAX3799ETJ

Analog Devices

TELECOM CIRCUIT

INDUSTRIAL

NO LEAD

32

HVQCCN

SQUARE

UNSPECIFIED

YES

1

BIPOLAR

3.3 V

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

.5 mm

85 Cel

-40 Cel

QUAD

S-XQCC-N32

.8 mm

5 mm

Not Qualified

NOT SPECIFIED

NOT SPECIFIED

5 mm

AD6122ACP

Analog Devices

TELECOM CIRCUIT

INDUSTRIAL

NO LEAD

32

HVQCCN

SQUARE

PLASTIC/EPOXY

YES

1

BICMOS

3 V

3

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

LCC32,.2SQ,20

Other Telecom ICs

.5 mm

85 Cel

-40 Cel

TIN LEAD

QUAD

S-PQCC-N32

1 mm

5 mm

Not Qualified

e0

5 mm

ADF5904WCCPZ-RL7

Analog Devices

TELECOM CIRCUIT

INDUSTRIAL

NO LEAD

32

HVQCCN

SQUARE

UNSPECIFIED

YES

1

AEC-Q100

3.3 V

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

.5 mm

105 Cel

-40 Cel

MATTE TIN

QUAD

S-XQCC-N32

3

.8 mm

5 mm

e3

30

260

5 mm

ADL5246ACPZN-R7

Analog Devices

TELECOM CIRCUIT

INDUSTRIAL

NO LEAD

32

HVQCCN

SQUARE

UNSPECIFIED

YES

1

3.3 V

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

.5 mm

105 Cel

-40 Cel

NICKEL PALLADIUM GOLD

QUAD

S-XQCC-N32

3

.8 mm

5 mm

e4

30

260

5 mm

AD6122ACPRL

Analog Devices

TELECOM CIRCUIT

INDUSTRIAL

NO LEAD

32

HVQCCN

SQUARE

PLASTIC/EPOXY

YES

1

BICMOS

3 V

3

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

LCC32,.2SQ,20

Other Telecom ICs

.5 mm

85 Cel

-40 Cel

TIN LEAD

QUAD

S-PQCC-N32

1 mm

5 mm

Not Qualified

e0

5 mm

AD6121ACPRL

Analog Devices

TELECOM CIRCUIT

INDUSTRIAL

NO LEAD

32

HVQCCN

SQUARE

UNSPECIFIED

YES

1

BICMOS

3 V

3

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

LCC32,.2SQ,20

Other Telecom ICs

.5 mm

85 Cel

-40 Cel

TIN LEAD

QUAD

S-XQCC-N32

1 mm

5 mm

Not Qualified

e0

5 mm

ADF5904WCCPZ

Analog Devices

TELECOM CIRCUIT

INDUSTRIAL

NO LEAD

32

HVQCCN

SQUARE

UNSPECIFIED

YES

1

AEC-Q100

3.3 V

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

.5 mm

105 Cel

-40 Cel

MATTE TIN

QUAD

S-XQCC-N32

3

.8 mm

5 mm

e3

30

260

5 mm

HMC775LC5

Analog Devices

TELECOM CIRCUIT

INDUSTRIAL

NO LEAD

32

HQCCN

SQUARE

CERAMIC, METAL-SEALED COFIRED

YES

1

5 V

CHIP CARRIER, HEAT SINK/SLUG

.5 mm

85 Cel

-40 Cel

GOLD OVER NICKEL

QUAD

S-CQCC-N32

3

1.12 mm

5 mm

Not Qualified

e4

260

5 mm

ADF5904ACPZ

Analog Devices

TELECOM CIRCUIT

INDUSTRIAL

NO LEAD

32

HVQCCN

SQUARE

UNSPECIFIED

YES

1

3.3 V

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

.5 mm

105 Cel

-40 Cel

MATTE TIN

QUAD

S-XQCC-N32

3

.8 mm

5 mm

e3

30

260

5 mm

AD6677BCPZ

Analog Devices

TELECOM CIRCUIT

INDUSTRIAL

NO LEAD

32

HVQCCN

SQUARE

UNSPECIFIED

YES

1

.163 mA

1.8 V

1.8

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

LCC32,.2SQ,20

Other Telecom ICs

.5 mm

85 Cel

-40 Cel

MATTE TIN

QUAD

S-XQCC-N32

3

.8 mm

5 mm

Not Qualified

e3

30

260

5 mm

AD6677BCPZRL7

Analog Devices

TELECOM CIRCUIT

INDUSTRIAL

NO LEAD

32

HVQCCN

SQUARE

UNSPECIFIED

YES

1

.163 mA

1.8 V

1.8

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

LCC32,.2SQ,20

Other Telecom ICs

.5 mm

85 Cel

-40 Cel

MATTE TIN

QUAD

S-XQCC-N32

3

.8 mm

5 mm

Not Qualified

e3

30

260

5 mm

ADA8282WBCPZ-R7

Analog Devices

TELECOM CIRCUIT

AUTOMOTIVE

NO LEAD

32

HVQCCN

SQUARE

UNSPECIFIED

YES

1

CMOS

AEC-Q100

3.3 V

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

.5 mm

125 Cel

-40 Cel

MATTE TIN

QUAD

S-XQCC-N32

3

.8 mm

5 mm

e3

30

260

5 mm

HMC742ALP5E

Analog Devices

TELECOM CIRCUIT

INDUSTRIAL

NO LEAD

32

HVQCCN

SQUARE

PLASTIC/EPOXY

YES

1

5 V

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

.5 mm

85 Cel

-40 Cel

MATTE TIN

QUAD

S-PQCC-N32

1

1 mm

5 mm

e3

30

260

5 mm

AD6122ACPRL7

Analog Devices

TELECOM CIRCUIT

INDUSTRIAL

NO LEAD

32

VQCCN

SQUARE

UNSPECIFIED

YES

1

BICMOS

CHIP CARRIER, VERY THIN PROFILE

.5 mm

85 Cel

-40 Cel

QUAD

S-XQCC-N32

1 mm

5 mm

5 mm

HMC775LC5TR

Analog Devices

TELECOM CIRCUIT

INDUSTRIAL

NO LEAD

32

HQCCN

SQUARE

CERAMIC, METAL-SEALED COFIRED

YES

1

5 V

CHIP CARRIER, HEAT SINK/SLUG

.5 mm

85 Cel

-40 Cel

QUAD

S-CQCC-N32

3

1.12 mm

5 mm

260

5 mm

HMC920LP5E

Analog Devices

TELECOM CIRCUIT

INDUSTRIAL

NO LEAD

32

HVQCCN

SQUARE

CERAMIC, METAL-SEALED COFIRED

YES

1

15 V

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

.5 mm

85 Cel

-40 Cel

MATTE TIN

QUAD

S-CQCC-N32

1

1 mm

5 mm

Not Qualified

e3

30

260

5 mm

ADA8282WBCPZ

Analog Devices

TELECOM CIRCUIT

AUTOMOTIVE

NO LEAD

32

HVQCCN

SQUARE

UNSPECIFIED

YES

1

CMOS

AEC-Q100

3.3 V

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

.5 mm

125 Cel

-40 Cel

MATTE TIN

QUAD

S-XQCC-N32

3

.8 mm

5 mm

e3

30

260

5 mm

HMC920LP5ETR

Analog Devices

TELECOM CIRCUIT

INDUSTRIAL

NO LEAD

32

HVQCCN

SQUARE

CERAMIC, METAL-SEALED COFIRED

YES

1

15 V

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

.5 mm

85 Cel

-40 Cel

MATTE TIN

QUAD

S-CQCC-N32

1

1 mm

5 mm

e3

30

260

5 mm

ADF7023BCPZ-RL7

Analog Devices

TELECOM CIRCUIT

INDUSTRIAL

NO LEAD

32

HVQCCN

SQUARE

UNSPECIFIED

YES

1

CMOS

3 V

2/3.3

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

LCC32,.2SQ,20

Other Telecom ICs

.5 mm

85 Cel

-40 Cel

QUAD

S-XQCC-N32

1 mm

5 mm

Not Qualified

5 mm

ADF7242BCPZ

Analog Devices

TELECOM CIRCUIT

INDUSTRIAL

NO LEAD

32

HVQCCN

SQUARE

UNSPECIFIED

YES

1

1.8/3.6

CHIP CARRIER

LCC32,.2SQ,20

Other Telecom ICs

.5 mm

85 Cel

-40 Cel

MATTE TIN

QUAD

S-XQCC-N32

3

.8 mm

5 mm

Not Qualified

e3

5 mm

ADF7241BCPZ

Analog Devices

TELECOM CIRCUIT

INDUSTRIAL

NO LEAD

32

HVQCCN

SQUARE

PLASTIC/EPOXY

YES

1

2/3.3

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

LCC32,.2SQ,20

Other Telecom ICs

.5 mm

85 Cel

-40 Cel

MATTE TIN

QUAD

S-PQCC-N32

3

.8 mm

5 mm

Not Qualified

e3

30

260

5 mm

ADN2830ACPZ32

Analog Devices

TELECOM CIRCUIT

INDUSTRIAL

NO LEAD

32

HVQCCN

SQUARE

UNSPECIFIED

YES

1

5 V

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

.5 mm

85 Cel

-40 Cel

MATTE TIN

QUAD

S-XQCC-N32

3

1 mm

5 mm

Not Qualified

e3

5 mm

HMC570LC5TR

Analog Devices

TELECOM CIRCUIT

OTHER

NO LEAD

32

HQCCN

SQUARE

UNSPECIFIED

YES

1

3.5 V

CHIP CARRIER, HEAT SINK/SLUG

.5 mm

85 Cel

-55 Cel

QUAD

S-XQCC-N32

1.12 mm

5 mm

NOT SPECIFIED

NOT SPECIFIED

5 mm

HMC570LC5

Analog Devices

TELECOM CIRCUIT

OTHER

NO LEAD

32

HQCCN

SQUARE

UNSPECIFIED

YES

1

3.5 V

CHIP CARRIER, HEAT SINK/SLUG

.5 mm

85 Cel

-55 Cel

GOLD OVER NICKEL

QUAD

S-XQCC-N32

1.12 mm

5 mm

Not Qualified

e4

5 mm

Other Function Telecom Interface ICs

Other Function Telecom Interface ICs are electronic components used in telecommunications systems to provide specialized functionality beyond basic data transmission. These ICs are designed to perform a range of functions such as signal processing, protocol conversion, and power management. They are used in a wide range of telecommunications applications, including wired and wireless communication systems, VoIP (Voice over Internet Protocol) systems, and telephone networks.

Some common types of Other Function Telecom Interface ICs include:

1. Codec ICs: These ICs are used to encode and decode audio signals for high-quality voice communication over telecommunication networks. They provide a range of features such as noise reduction, echo cancellation, and voice activation.

2. Power management ICs: These ICs are used to manage the power supply and battery life of telecommunication devices. They regulate voltage and current to ensure efficient operation and prevent damage to the device.

3. Signal conditioning ICs: These ICs are used to enhance the quality of signals transmitted over telecommunication networks. They can filter out noise and interference, amplify signals, and correct distortions in the signal.

4. Switching ICs: These ICs are used to switch between different communication channels and protocols, enabling communication between different devices and networks.