產品詳細資料

Configuration Crosspoint/exchange Number of channels 24 Power supply voltage - single (V) 2.5, 3.3 Protocols Analog Ron (typ) (Ω) 5 CON (typ) (pF) 8 ON-state leakage current (max) (µA) 20 Bandwidth (MHz) 100 Operating temperature range (°C) -40 to 85 Features Powered-off protection, Signal path translation Input/output continuous current (max) (mA) 128 Rating Catalog Drain supply voltage (max) (V) 3.6 Supply voltage (max) (V) 3.6
Configuration Crosspoint/exchange Number of channels 24 Power supply voltage - single (V) 2.5, 3.3 Protocols Analog Ron (typ) (Ω) 5 CON (typ) (pF) 8 ON-state leakage current (max) (µA) 20 Bandwidth (MHz) 100 Operating temperature range (°C) -40 to 85 Features Powered-off protection, Signal path translation Input/output continuous current (max) (mA) 128 Rating Catalog Drain supply voltage (max) (V) 3.6 Supply voltage (max) (V) 3.6
TSSOP (DGG) 56 113.4 mm² 14 x 8.1
  • Member of the Texas Instruments Widebus™ Family
  • Output Voltage Translation Tracks VCC
  • Supports Mixed-Mode Signal Operation on All Data I/O Ports
    • 5-V Input Down to 3.3-V Output Level Shift With 3.3-V VCC
    • 5-V/3.3-V Input Down to 2.5-V Output Level Shift With 2.5-V VCC
  • 5-V-Tolerant I/Os With Device Powered Up or Powered Down
  • Bidirectional Data Flow, With Near-Zero Propagation Delay
  • Low ON-State Resistance (ron) Characteristics (ron = 5 Typ)
  • Low Input/Output Capacitance Minimizes Loading (Cio(OFF) = 9 pF Typ)
  • Data and Control Inputs Provide Undershoot Clamp Diodes
  • Low Power Consumption (ICC = 70 µA Max)
  • VCC Operating Range From 2.3 V to 3.6 V
  • Data I/Os Support 0- to 5-V Signaling Levels (0.8 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.3 V, 5 V)
  • Control Inputs Can Be Driven by TTL or 5-V/3.3-V CMOS Outputs
  • Ioff Supports Partial-Power-Down Mode Operation
  • Latch-Up Performance Exceeds 250 mA Per JESD 17
  • ESD Performance Tested Per JESD 22
    • 2000-V Human-Body Model (A114-B, Class II)
    • 1000-V Charged-Device Model (C101)
  • Supports Digital Applications: Level Translation, PCI Interface, USB Interface, Memory Interleaving, and Bus Isolation
  • Ideal for Low-Power Portable Equipment

Widebus is a trademark of Texas Instruments.

  • Member of the Texas Instruments Widebus™ Family
  • Output Voltage Translation Tracks VCC
  • Supports Mixed-Mode Signal Operation on All Data I/O Ports
    • 5-V Input Down to 3.3-V Output Level Shift With 3.3-V VCC
    • 5-V/3.3-V Input Down to 2.5-V Output Level Shift With 2.5-V VCC
  • 5-V-Tolerant I/Os With Device Powered Up or Powered Down
  • Bidirectional Data Flow, With Near-Zero Propagation Delay
  • Low ON-State Resistance (ron) Characteristics (ron = 5 Typ)
  • Low Input/Output Capacitance Minimizes Loading (Cio(OFF) = 9 pF Typ)
  • Data and Control Inputs Provide Undershoot Clamp Diodes
  • Low Power Consumption (ICC = 70 µA Max)
  • VCC Operating Range From 2.3 V to 3.6 V
  • Data I/Os Support 0- to 5-V Signaling Levels (0.8 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.3 V, 5 V)
  • Control Inputs Can Be Driven by TTL or 5-V/3.3-V CMOS Outputs
  • Ioff Supports Partial-Power-Down Mode Operation
  • Latch-Up Performance Exceeds 250 mA Per JESD 17
  • ESD Performance Tested Per JESD 22
    • 2000-V Human-Body Model (A114-B, Class II)
    • 1000-V Charged-Device Model (C101)
  • Supports Digital Applications: Level Translation, PCI Interface, USB Interface, Memory Interleaving, and Bus Isolation
  • Ideal for Low-Power Portable Equipment

Widebus is a trademark of Texas Instruments.

The SN74CB3T16212 is a high-speed TTL-compatible FET bus-exchange switch, with low ON-state resistance (ron), allowing for minimal propagation delay. The device fully supports mixed-mode signal operation on all data I/O ports by providing voltage translation that tracks VCC. The SN74CB3T16212 supports systems using 5-V TTL, 3.3-V LVTTL, and 2.5-V CMOS switching standards, as well as user-defined switching levels (see Figure 1).

The SN74CB3T16212 operates as a 24-bit bus switch or as a 12-bit bus exchange that provides data exchanging between four signal ports. The select (S0, S1, S2) inputs control the data path of the bus-exchange switch. When the bus-exchange switch is ON, the A port is connected to the B port, allowing bidirectional data flow between ports. When the bus-exchange switch is OFF, a high-impedance state exists between the A and B ports.

This device is fully specified for partial-power-down applications using Ioff. The Ioff feature ensures that damaging current will not backflow through the device when it is powered down. The device has isolation during power off.

To ensure the high-impedance state during power up or power down, each select input should be tied to GND through a pulldown resistor; the minimum value of the resistor is determined by the current-sourcing capability of the driver.

The SN74CB3T16212 is a high-speed TTL-compatible FET bus-exchange switch, with low ON-state resistance (ron), allowing for minimal propagation delay. The device fully supports mixed-mode signal operation on all data I/O ports by providing voltage translation that tracks VCC. The SN74CB3T16212 supports systems using 5-V TTL, 3.3-V LVTTL, and 2.5-V CMOS switching standards, as well as user-defined switching levels (see Figure 1).

The SN74CB3T16212 operates as a 24-bit bus switch or as a 12-bit bus exchange that provides data exchanging between four signal ports. The select (S0, S1, S2) inputs control the data path of the bus-exchange switch. When the bus-exchange switch is ON, the A port is connected to the B port, allowing bidirectional data flow between ports. When the bus-exchange switch is OFF, a high-impedance state exists between the A and B ports.

This device is fully specified for partial-power-down applications using Ioff. The Ioff feature ensures that damaging current will not backflow through the device when it is powered down. The device has isolation during power off.

To ensure the high-impedance state during power up or power down, each select input should be tied to GND through a pulldown resistor; the minimum value of the resistor is determined by the current-sourcing capability of the driver.

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類型 標題 日期
* Data sheet SN74CB3T16212 datasheet (Rev. A) 2005年 1月 28日
Application note Selecting the Correct Texas Instruments Signal Switch (Rev. E) PDF | HTML 2022年 6月 2日
Application note Multiplexers and Signal Switches Glossary (Rev. B) PDF | HTML 2021年 12月 1日
Application note CBT-C, CB3T, and CB3Q Signal-Switch Families (Rev. C) PDF | HTML 2021年 11月 19日
Application brief Eliminate Power Sequencing with Powered-off Protection Signal Switches (Rev. C) PDF | HTML 2021年 1月 6日
Selection guide Logic Guide (Rev. AB) 2017年 6月 12日
Application note How to Select Little Logic (Rev. A) 2016年 7月 26日
Application note Understanding and Interpreting Standard-Logic Data Sheets (Rev. C) 2015年 12月 2日
User guide LOGIC Pocket Data Book (Rev. B) 2007年 1月 16日
More literature Digital Bus Switch Selection Guide (Rev. A) 2004年 11月 10日
Application note Semiconductor Packing Material Electrostatic Discharge (ESD) Protection 2004年 7月 8日
Application note Selecting the Right Level Translation Solution (Rev. A) 2004年 6月 22日
User guide Signal Switch Data Book (Rev. A) 2003年 11月 14日
Application note Bus FET Switch Solutions for Live Insertion Applications 2003年 2月 7日

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SN74CB3T16212 IBIS Model

SCDM141.ZIP (27 KB) - IBIS Model
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