SN74CB3T16211 24-Bit FET 2.5-V/3.3-V Low-Voltage Bus Switch with 5-V Tolerant Level Shifter | TI.com

SN74CB3T16211 (ACTIVE)

24-Bit FET 2.5-V/3.3-V Low-Voltage Bus Switch with 5-V Tolerant Level Shifter

24-Bit FET 2.5-V/3.3-V Low-Voltage Bus Switch with 5-V Tolerant Level Shifter - SN74CB3T16211
Datasheet
 

Description

The SN74CB3T16211 is a high-speed TTL-compatible FET bus 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 SN74CB3T16211 supports systems using 5-V TTL, 3.3-V LVTTL, and 2.5-V CMOS switching standards, as well as user-defined switching levels.

The I/O port of this device has a pullup current source that maintains the output voltage at VCC when the device is ON, and the input is greater than or equal to VCC – 1. Because of the pullup current source, the output voltage level may be less than VCC when the operating frequency is low and the I/O port is connected to a pulldown resistor. In order to maintain the output voltage at VCC, a pullup resistor must be connected to VCC instead of a pulldown resistor to ground.

The SN74CB3T16211 is organized as two 12-bit bus switches with separate output-enable (1OE, 2OE) inputs. It can be used as two 12-bit bus switches or as one 24-bit bus switch. When OE is low, the associated 12-bit bus switch is ON, and the A port is connected to the B port, allowing bidirectional data flow between ports. When OE is high, the associated 12-bit bus switch is OFF, and 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, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

Features

  • 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 Ω Typ)
  • Low Input/Output Capacitance Minimizes
    Loading (Cio(OFF) = 5 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, Bus Isolation
  • Ideal for Low-Power Portable Equipment

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Parametrics Compare all products in Analog Switches/Muxes

 
Configuration
Number of Channels (#)
Power Supply Type
Vss (Min) (V)
Vss (Max) (V)
Vdd (Min) (V)
Vdd (Max) (V)
Ron (Typ) (Ohms)
Bandwidth (MHz)
Rating
Operating Temperature Range (C)
Package Size: mm2:W x L (PKG)
Package Group
Supply Range (Max)
Ron (Max) (Ohms)
Input/Output Continuous Current (Max) (mA)
Supply Current (Max) (uA)
Features
OFF-state leakage current (Max) (µA)
ON-state leakage current (Max) (µA)
Input/Output ON-state Capacitance (Typ) (pF)
Input/Output OFF-state Capacitance (Typ) (pF)
ESD Charged Device Model (kV)
ESD HBM (kV)
VIL (Max) (V)
VIH (Min) (V)
SN74CB3T16211 SN74CBTD16211
1:1 SPST     1:1 SPST    
24     24    
Single     Single    
N/A     N/A    
N/A     N/A    
2.3     4.5    
3.6     5.5    
5     5    
100     20    
Catalog     Catalog    
-40 to 85     -40 to 85    
56BGA MICROSTAR JUNIOR: 32 mm2: 4.5 x 7(BGA MICROSTAR JUNIOR)
56SSOP: 191 mm2: 10.35 x 18.42(SSOP)
56TSSOP: 113 mm2: 8.1 x 14(TSSOP)
56TVSOP: 72 mm2: 6.4 x 11.3(TVSOP)    
56SSOP: 191 mm2: 10.35 x 18.42(SSOP)
56TSSOP: 113 mm2: 8.1 x 14(TSSOP)
56TVSOP: 72 mm2: 6.4 x 11.3(TVSOP)    
BGA MICROSTAR JUNIOR
SSOP
TSSOP
TVSOP    
SSOP
TSSOP
TVSOP    
3.6     5.5    
9.5     50    
128     128    
70     1500    
Powered off protection
Signal path Translation    
Voltage Level Shifting    
10     1    
  1    
13      
5     5.5    
1      
2      
0.8     0.8    
1.7     2