SN74CB3Q3257PWE4
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Texas Instruments SN74CB3Q3257PWE4

Manufacturer No:
SN74CB3Q3257PWE4
Manufacturer:
Texas Instruments
Package:
Tube
Description:
IC MUX/DEMUX 4 X 2:1 16TSSOP
Delivery:
Payment:
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Product Introduction

Overview

The SN74CB3Q3257PWE4, produced by Texas Instruments, is a high-bandwidth FET bus switch designed for multiplexing and demultiplexing applications. This device utilizes a charge pump to elevate the gate voltage of the pass transistor, providing a low and flat ON-state resistance (ron), which enables minimal propagation delay and supports rail-to-rail switching on the data input/output (I/O) ports. It is organized as two 1-of-4 multiplexers/demultiplexers with separate output-enable inputs, allowing for bidirectional data flow between ports when enabled and a high-impedance state when disabled. The device is fully specified for partial-power-down applications and features isolation during power off, making it suitable for a variety of high-bandwidth applications in broadband communications, networking, and data-intensive computing systems.

Key Specifications

Parameter Value Unit
High-Bandwidth Data Path Up to 500 MHz
ON-State Resistance (ron) 4 Ω (Typical)
VCC Operating Range 2.3 V to 3.6 V
Data I/O Signal Levels 0 to 5 V
Input/Output Capacitance (Cio(OFF)) 3.5 pF (Typical)
Switching Frequency (fOE) 20 MHz (Max)
Power Consumption (ICC) 0.6 mA (Typical)
ESD Performance 2000 V Human Body Model, 1000 V Charged-Device Model
Package Options TVSOP (16), SSOP (16), TSSOP (16), VQFN (16)

Key Features

  • High-bandwidth data path up to 500 MHz
  • 5V tolerant I/Os with the device powered up or powered down
  • Low and flat ON-state resistance (ron)
  • Rail-to-rail switching on data I/O ports
  • Bidirectional data flow with near-zero propagation delay
  • Low input/output capacitance to minimize capacitive loading and signal distortion
  • Support for partial-power-down mode operation using Ioff
  • Latch-up performance exceeds 100 mA per JESD 78, Class II
  • ESD performance tested per JESD 22 – 2000 V Human Body Model, 1000 V Charged-Device Model
  • Control inputs can be driven by TTL or 5V / 3.3V CMOS outputs

Applications

  • IP Phones: wired and wireless
  • Optical modules
  • Optical networking: video over fiber and EPON
  • Private branch exchange (PBX)
  • WiMAX and wireless infrastructure equipment
  • USB interface, differential signal interface, bus isolation, low-distortion signal gating

Q & A

  1. What is the primary function of the SN74CB3Q3257 device?

    The SN74CB3Q3257 is a high-bandwidth FET bus switch used for multiplexing and demultiplexing applications.

  2. What is the maximum bandwidth of the SN74CB3Q3257?

    The device supports a high-bandwidth data path up to 500 MHz.

  3. What are the VCC operating range and data I/O signal levels for the SN74CB3Q3257?

    The VCC operating range is from 2.3 V to 3.6 V, and the data I/Os support 0 to 5 V signal levels.

  4. How does the SN74CB3Q3257 handle partial-power-down mode operation?

    The device features Ioff circuitry that prevents damaging current backflow through the device when it is powered down and ensures isolation during power off.

  5. What types of ESD performance does the SN74CB3Q3257 have?

    The device has ESD performance tested per JESD 22 – 2000 V Human Body Model, 1000 V Charged-Device Model.

  6. Can the control inputs of the SN74CB3Q3257 be driven by different types of logic outputs?

    Yes, the control inputs can be driven by TTL or 5V / 3.3V CMOS outputs.

  7. What is the typical power consumption of the SN74CB3Q3257?

    The typical power consumption is 0.6 mA.

  8. What are some common applications of the SN74CB3Q3257?

    Common applications include IP phones, optical modules, optical networking, private branch exchange (PBX), and WiMAX and wireless infrastructure equipment.

  9. How does the SN74CB3Q3257 minimize signal distortion?

    The device features low data I/O capacitance to minimize capacitive loading and signal distortion on the data bus.

  10. What types of packages are available for the SN74CB3Q3257?

    The device is available in TVSOP, SSOP, TSSOP, and VQFN packages.

Product Attributes

Type:Multiplexer/Demultiplexer
Circuit:4 x 2:1
Independent Circuits:1
Current - Output High, Low:- 
Voltage Supply Source:Single Supply
Voltage - Supply:2.3V ~ 3.6V
Operating Temperature:-40°C ~ 85°C
Mounting Type:Surface Mount
Package / Case:16-TSSOP (0.173", 4.40mm Width)
Supplier Device Package:16-TSSOP
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Similar Products

Part Number SN74CB3Q3257PWE4 SN74CB3Q3257PWG4
Manufacturer Texas Instruments Texas Instruments
Product Status Discontinued at Digi-Key Discontinued at Digi-Key
Type Multiplexer/Demultiplexer Multiplexer/Demultiplexer
Circuit 4 x 2:1 4 x 2:1
Independent Circuits 1 1
Current - Output High, Low - -
Voltage Supply Source Single Supply Single Supply
Voltage - Supply 2.3V ~ 3.6V 2.3V ~ 3.6V
Operating Temperature -40°C ~ 85°C -40°C ~ 85°C
Mounting Type Surface Mount Surface Mount
Package / Case 16-TSSOP (0.173", 4.40mm Width) 16-TSSOP (0.173", 4.40mm Width)
Supplier Device Package 16-TSSOP 16-TSSOP

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