PinoutSpecificationsSupply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... . .0.5 V to 4.6 VInput voltage range, VI (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.5 V to 7 ...
SN54LVTT240: PinoutSpecificationsSupply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... . .0.5 V to 4.6 VInput voltage range, VI (see Note 1) ...
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Features: PinoutSpecificationsDescriptionThe SN54/74LS147 and SN54/74LS148 are Priority Encoders. ...
PinoutDescriptionThe LS155 and LS156 are Dual 1-of-4 Decoder/Demultiplexers with common Address in...

These octal buffers and line drivers SN54LVTT240 are designed specifically for low-voltage (3.3-V) VCC operation, but with the capability to provide a TTL interface to a 5-V system environment.
The SN54LVTT240 is organized as two 4-bit buffer/line drivers with separate output-enable (OE) inputs. When OE is low, the SN54LVTT240 passes data from the A inputs to the Y outputs. When OE is high, the outputs are in the high-impedance state.
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 SN54LVTT240 is determined by the current-sinking capability of the driver.
The SN74LVTT240 is available in TI's shrink small-outline package (DB), which provides the same I/O pin count and functionality of standard small-outline packages in less than half the printed-circuit-board area.
The SN54LVTT240 is characterized for operation over the full military temperature range of 55°C to 125°C. The SN74LVTT240 is characterized for operation from 40°C to 85°C.