Texas Instruments SN74CB3T3125DGVR
- Part Number:
- SN74CB3T3125DGVR
- Manufacturer:
- Texas Instruments
- Ventron No:
- 5037802-SN74CB3T3125DGVR
- Description:
- 3.3-V, 1:1 (SPST), 4-channel FET bus switch with level shifter
- Datasheet:
- sn74cb3t3125
- Configuration1:1 SPST
- Number of channels4
- Power supply voltage - single (V)2.5
- ProtocolsAnalog
- Ron (typ) (Ω)5
- CON (typ) (pF)4
- ON-state leakage current (max) (μA)20
- Bandwidth (MHz)100
- Operating temperature range (°C)-40 to 85
- FeaturesPowered-off protection
- Input/output continuous current (max) (mA)128
- RatingCatalog
The SN74CB3T3125 is a high-speed TTL-compatible FET bus switch with low ON-stateresistance (ron), allowing for minimal propagation delay. The device fullysupports mixed-mode signal operation on all data I/O ports by providing voltage translation thattracks VCC. The SN74CB3T3125 supports systems using 5-V TTL, 3.3-V LVTTL,and 2.5-V CMOS switching standards, as well as user-defined switching levels (seeTypical DC Voltage-Translation Characteristics).
The SN74CB3T3125 is organized as four 1-bit bus switches with separate output-enable(1OE, 2OE, 3OE,4OE) inputs. It can be used as four 1-bit bus switches or as one 4-bit busswitch. When OE is low, the associated 1-bit bus switch is ON, and the Aport is connected to the B port, allowing bidirectional data flow between ports. WhenOE is high, the associated 1-bit bus switch is OFF, and the high-impedancestate exists between the A and B ports.
This device is fully specified for partial-power-down applications usingIoff. The Ioff feature ensures that damaging currentwill not backflow through the device when it is powered down. The device has isolation during poweroff.
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 thedriver.
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