Dual 1-of-4 FET Mult/Demult 2.5-V/3.3-V Low-Voltage Bus Switch With 5-V Tolerant Level Shifter

The SN74CB3T3253 is a high-speed TTL-compatible FET multiplexer/demultiplexer 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 SN74CB3T3253 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 SN74CB3T3253 is organized as two 1-of-4 multiplexer/demultiplexers with separate output-enable (1OE, 2OE) inputs. The select (S0, S1) inputs control the data path of each multiplexer/demultiplexer. When OE is low, the associated multiplexer/demultiplexer is ON, and the A port is connected to the B port, allowing bidirectional data flow between ports. When OE is high, the associated multiplexer/demultiplexer 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.
By Texas Instruments
Part Manufacturer Description Datasheet Samples
SN74CB3T3253DR Texas Instruments Dual 1-of-4 FET Mult/Demult 2.5-V/3.3-V Low-Voltage Bus Switch with 5-V Tolerant Level Shifter 16-SOIC -40 to 85
SN74CB3T3253DG4 Texas Instruments Dual 1-of-4 FET Mult/Demult 2.5-V/3.3-V Low-Voltage Bus Switch with 5-V Tolerant Level Shifter 16-SOIC -40 to 85
SN74CB3T3253PW Texas Instruments Dual 1-of-4 FET Mult/Demult 2.5-V/3.3-V Low-Voltage Bus Switch with 5-V Tolerant Level Shifter 16-TSSOP -40 to 85
SN74CB3T3253PWRG4 Texas Instruments Dual 1-of-4 FET Mult/Demult 2.5-V/3.3-V Low-Voltage Bus Switch with 5-V Tolerant Level Shifter 16-TSSOP -40 to 85
SN74CB3T3253DBQR Texas Instruments Dual 1-of-4 FET Mult/Demult 2.5-V/3.3-V Low-Voltage Bus Switch with 5-V Tolerant Level Shifter 16-SSOP -40 to 85
SN74CB3T3253D Texas Instruments Dual 1-of-4 FET Mult/Demult 2.5-V/3.3-V Low-Voltage Bus Switch with 5-V Tolerant Level Shifter 16-SOIC -40 to 85
SN74CB3T3253DRG4 Texas Instruments Dual 1-of-4 FET Mult/Demult 2.5-V/3.3-V Low-Voltage Bus Switch with 5-V Tolerant Level Shifter 16-SOIC -40 to 85
SN74CB3T3253DGVR Texas Instruments Dual 1-of-4 FET Mult/Demult 2.5-V/3.3-V Low-Voltage Bus Switch with 5-V Tolerant Level Shifter 16-TVSOP -40 to 85
SN74CB3T3253PWG4 Texas Instruments Dual 1-of-4 FET Mult/Demult 2.5-V/3.3-V Low-Voltage Bus Switch with 5-V Tolerant Level Shifter 16-TSSOP -40 to 85
SN74CB3T3253PWE4 Texas Instruments Dual 1-of-4 FET Mult/Demult 2.5-V/3.3-V Low-Voltage Bus Switch with 5-V Tolerant Level Shifter 16-TSSOP -40 to 85
SN74CB3T3253 's PackagesSN74CB3T3253 's pdf datasheet
74CB3T3253DBQRE4 SSOP
74CB3T3253DBQRG4 SSOP
74CB3T3253DGVRE4 TVSOP
74CB3T3253DGVRG4 TVSOP
SN74CB3T3253D SOIC
SN74CB3T3253DBQR SSOP
SN74CB3T3253DE4 SOIC
SN74CB3T3253DG4 SOIC
SN74CB3T3253DGVR TVSOP
SN74CB3T3253DR SOIC
SN74CB3T3253DRE4 SOIC
SN74CB3T3253DRG4 SOIC
SN74CB3T3253PW TSSOP
SN74CB3T3253PWE4 TSSOP
SN74CB3T3253PWG4 TSSOP
SN74CB3T3253PWR TSSOP
SN74CB3T3253PWRE4 TSSOP
SN74CB3T3253PWRG4 TSSOP

SN74CB3T3253 pdf datasheet download


SN74CB3T3253 Pinout, Pinouts
SN74CB3T3253 pinout,Pin out
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