SN74CB3Q3251RGYR
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Texas Instruments SN74CB3Q3251RGYR

Manufacturer No:
SN74CB3Q3251RGYR
Manufacturer:
Texas Instruments
Package:
Tape & Reel (TR)
Description:
IC MUX/DEMUX 1 X 8:1 16VQFN
Delivery:
Payment:
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Product Introduction

Overview

The SN74CB3Q3251RGYR, produced by Texas Instruments, is a 1-of-8 FET multiplexer/demultiplexer designed for high-bandwidth applications. This device operates as a 2.5-V/3.3-V low-voltage bus switch, making it ideal for broadband communications, networking, and data-intensive computing systems. It features a single output-enable (OE) input and select inputs (S0, S1, S2) that control the data path, allowing bidirectional data flow between ports when enabled.

The SN74CB3Q3251 utilizes a charge pump to elevate the gate voltage of the pass transistor, resulting in low and flat ON-state resistance. This design minimizes propagation delay and supports rail-to-rail switching on the data input/output (I/O) ports. The device also includes low data I/O capacitance to reduce capacitive loading and signal distortion.

Key Specifications

Parameter Min Typ Max Unit
Supply Voltage Range (VCC) 2.3 3.6 V
Control Input Voltage Range (VIN) –0.5 7 V
Switch I/O Voltage Range (VI/O) –0.5 7 V
Operating Free-Air Temperature (TA) –40 85 °C
High-Level Control Input Voltage (VIH) 2 5.5 V
Low-Level Control Input Voltage (VIL) 0 0.8 V
ON-State Switch Current (II/O) ±64 mA
Input/Output Capacitance (Cio(OFF)) 3.5 4.5 pF
Propagation Delay (tpd) ns
Switching Frequency (fOE or fS) 20 MHz

Key Features

  • High-bandwidth data path (up to 500 MHz)
  • Low power consumption (ICC = 1 mA Typ)
  • Low and flat ON-state resistance (ron = 4 Ω Typ)
  • Rail-to-rail switching on data I/O ports
  • 5-V tolerant I/Os with device powered up or powered down
  • Data I/Os support 0- to 5-V signaling levels
  • Control inputs can be driven by TTL or 5-V/3.3-V CMOS outputs
  • Bidirectional data flow with near-zero propagation delay
  • Low input/output capacitance minimizes loading and signal distortion
  • Supports partial-power-down mode operation
  • ESD performance tested per JESD 22 (2000-V Human-Body Model, 1000-V Charged-Device Model)

Applications

  • PCI interface
  • Differential signal interface
  • Memory interleaving
  • Bus isolation
  • Low-distortion signal gating
  • Broadband communications
  • Networking
  • Data-intensive computing systems

Q & A

  1. What is the primary function of the SN74CB3Q3251?

    The SN74CB3Q3251 is a 1-of-8 FET multiplexer/demultiplexer designed for high-bandwidth applications.

  2. What is the operating voltage range of the SN74CB3Q3251?

    The device operates within a supply voltage range of 2.3 V to 3.6 V.

  3. What are the key features of the SN74CB3Q3251?

    Key features include high-bandwidth data path, low power consumption, low and flat ON-state resistance, and rail-to-rail switching on data I/O ports.

  4. How does the SN74CB3Q3251 handle ESD protection?

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

  5. What are the typical applications of the SN74CB3Q3251?

    Typical applications include PCI interface, differential signal interface, memory interleaving, bus isolation, and low-distortion signal gating.

  6. How does the SN74CB3Q3251 support partial-power-down mode?

    The device supports partial-power-down mode operation using Ioff circuitry, which prevents damaging current backflow when the device is powered down.

  7. What is the maximum switching frequency of the SN74CB3Q3251?

    The maximum switching frequency is 20 MHz for both OE and S inputs.

  8. What is the typical ON-state resistance of the SN74CB3Q3251?

    The typical ON-state resistance (ron) is 4 Ω.

  9. How does the SN74CB3Q3251 minimize signal distortion?

    The device minimizes signal distortion through low input/output capacitance.

  10. What are the package options available for the SN74CB3Q3251?

    Package options include SSOP (DBQ), TVSOP (DGV), TSSOP (PW), and QFN (RGY).

  11. What is the operating temperature range of the SN74CB3Q3251?

    The operating free-air temperature range is from –40°C to 85°C.

Product Attributes

Type:Multiplexer/Demultiplexer
Circuit:1 x 8:1
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-VFQFN Exposed Pad
Supplier Device Package:16-VQFN (4x3.5)
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Similar Products

Part Number SN74CB3Q3251RGYR SN74CB3Q3257RGYR SN74CB3Q3253RGYR
Manufacturer Texas Instruments Texas Instruments Texas Instruments
Product Status Active Active Active
Type Multiplexer/Demultiplexer Multiplexer/Demultiplexer Multiplexer/Demultiplexer
Circuit 1 x 8:1 4 x 2:1 2 x 4:1
Independent Circuits 1 1 1
Current - Output High, Low - - -
Voltage Supply Source Single Supply Single Supply Single Supply
Voltage - Supply 2.3V ~ 3.6V 2.3V ~ 3.6V 2.3V ~ 3.6V
Operating Temperature -40°C ~ 85°C -40°C ~ 85°C -40°C ~ 85°C
Mounting Type Surface Mount Surface Mount Surface Mount
Package / Case 16-VFQFN Exposed Pad 16-VFQFN Exposed Pad 16-VFQFN Exposed Pad
Supplier Device Package 16-VQFN (4x3.5) 16-VQFN (4x3.5) 16-VQFN (4x3.5)

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