| Buffers, Drivers, Receivers, Transceivers | 7 | Active | These octal bus transceivers are designed for asynchronous communication between data buses. The devices transmit data from the A bus to the B bus or from the B bus to the A bus depending upon the logic level at the direction-control (DIR) input. The output enableinput can be used to disable the device so the buses are effectively isolated.
The SN74F245 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 SN54F245 is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74F245 is characterized for operation from 0°C to 70°C.
These octal bus transceivers are designed for asynchronous communication between data buses. The devices transmit data from the A bus to the B bus or from the B bus to the A bus depending upon the logic level at the direction-control (DIR) input. The output enableinput can be used to disable the device so the buses are effectively isolated.
The SN74F245 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 SN54F245 is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74F245 is characterized for operation from 0°C to 70°C. |
SN74F251B1-of-8 Data Selectors/Multiplexers With 3-State Outputs | Logic | 2 | Active | These data selectors/multiplexers contain full binary decoding to select one of eight data sources and feature strobe-controlled complementary outputs. The 3-state outputs can interface with and drive data lines of bus-organized systems. When the strobe (G\) input is high, both outputs are in a high-impedance state in which both the upper and lower transistors of each totem-pole output are off, and the output neither drives nor loads the bus significantly.
The SN54F251B is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74F251B is characterized for operation from 0°C to 70°C.
D0, D1,...D7 = the level of the respective D input.
These data selectors/multiplexers contain full binary decoding to select one of eight data sources and feature strobe-controlled complementary outputs. The 3-state outputs can interface with and drive data lines of bus-organized systems. When the strobe (G\) input is high, both outputs are in a high-impedance state in which both the upper and lower transistors of each totem-pole output are off, and the output neither drives nor loads the bus significantly.
The SN54F251B is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74F251B is characterized for operation from 0°C to 70°C.
D0, D1,...D7 = the level of the respective D input. |
SN74F253Dual 1-of-4 Data Selectors/Multiplexers With 3-State Outputs | Integrated Circuits (ICs) | 4 | Active | These data selectors/multiplexers contain inverters and drivers to supply full binary decoding data selection to the AND-OR gates. Separate output-control inputs are provided for each of the two 4-line sections.
The 3-state outputs can interface with and drive data lines of bus-organized systems. With all but one of the common outputs disabled (at a high-impedance state), the low impedance of the single enabled output will drive the bus line to a high or low logic level. Each output has its own strobe (G\) inputs. The output is disabled when its strobe is high.
The SN54F253 is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74F253 is characterized for operation from 0°C to 70°C.
Select inputs A and B are common to both sections.
These data selectors/multiplexers contain inverters and drivers to supply full binary decoding data selection to the AND-OR gates. Separate output-control inputs are provided for each of the two 4-line sections.
The 3-state outputs can interface with and drive data lines of bus-organized systems. With all but one of the common outputs disabled (at a high-impedance state), the low impedance of the single enabled output will drive the bus line to a high or low logic level. Each output has its own strobe (G\) inputs. The output is disabled when its strobe is high.
The SN54F253 is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74F253 is characterized for operation from 0°C to 70°C.
Select inputs A and B are common to both sections. |
SN74F257Quadruple 2-Line To 1-Line Data Selectors/Multiplexers With 3-State Outputs | Integrated Circuits (ICs) | 4 | Active | The ´F257 is designed to multiplex signals from 4-bit data sources to 4-output data lines in bus-organized systems. The 3-state outputs will not load the data lines when the output enable () input is at a high logic level.
The SN54F257 is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74F257 is characterized for operation from 0°C to 70°C.
The ´F257 is designed to multiplex signals from 4-bit data sources to 4-output data lines in bus-organized systems. The 3-state outputs will not load the data lines when the output enable () input is at a high logic level.
The SN54F257 is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74F257 is characterized for operation from 0°C to 70°C. |
SN74F258Quadruple 2-Line To 1-Line Data Selectors/Multiplexers With 3-State Outputs | Logic | 4 | Active | The ´F258 is designed to multiplex signals from 4-bit data sources to 4-output data lines in bus-organized systems. The 3-state outputs will not load the data lines when the output-enable () input is at a high logic level.
The SN54F258 is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74F258 is characterized for operation from 0°C to 70°C.
The ´F258 is designed to multiplex signals from 4-bit data sources to 4-output data lines in bus-organized systems. The 3-state outputs will not load the data lines when the output-enable () input is at a high logic level.
The SN54F258 is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74F258 is characterized for operation from 0°C to 70°C. |
SN74F2602-ch, 5-input, 4.5-V to 5.5-V bipolar NOR gates | Gates and Inverters | 3 | Active | The SN74F260 contains two independent 5-input positive-NOR gates. It performs the Boolean functionsin positive logic.
The SN74F260 is characterized for operation from 0°C to 70°C.
The SN74F260 contains two independent 5-input positive-NOR gates. It performs the Boolean functionsin positive logic.
The SN74F260 is characterized for operation from 0°C to 70°C. |
SN74F273-ch, 3-input, 4.5-V to 5.5-V bipolar NOR gates | Logic | 4 | Active | These devices contain three independent 3-input NOR gates. They perform the Boolean functionsorin positive logic.
The SN54F27 is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74F27 is characterized for operation from 0°C to 70°C.
These devices contain three independent 3-input NOR gates. They perform the Boolean functionsorin positive logic.
The SN54F27 is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74F27 is characterized for operation from 0°C to 70°C. |
SN74F280B9-bit odd/even parity generators / checkers | Parity Generators and Checkers | 2 | Active | These universal, monolithic, 9-bit parity generators/checkers feature odd and even outputs to facilitate operation of either odd or even parity application. The word-length capability is easily expanded by cascading.
The SN54F280B is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74F280B is characterized for operation from 0°C to 70°C.
These universal, monolithic, 9-bit parity generators/checkers feature odd and even outputs to facilitate operation of either odd or even parity application. The word-length capability is easily expanded by cascading.
The SN54F280B is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74F280B is characterized for operation from 0°C to 70°C. |
SN74F299Universal shift / storage registers | Logic | 4 | Active | These 8-bit universal shift/storage registers feature multiplexed I/O ports to achieve full 8-bit data handling in a single 20-pin package. Two function-select (S0, S1) inputs and two output-enable (OE1\, OE2\) inputs can be used to choose the modes of operation listed in the function table.
Synchronous parallel loading is accomplished by taking both S0 and S1 high. This places the 3-state outputs in a high-impedance state and permits data that is applied on the I/O ports to be clocked into the register. Reading out of the register can be accomplished while the outputs are enabled in any mode. Clearing occurs when the clear (CLR\) input is low. Taking either OE1\ or OE2\ high disables the outputs but has no effect on clearing, shifting, or storage of data.
These 8-bit universal shift/storage registers feature multiplexed I/O ports to achieve full 8-bit data handling in a single 20-pin package. Two function-select (S0, S1) inputs and two output-enable (OE1\, OE2\) inputs can be used to choose the modes of operation listed in the function table.
Synchronous parallel loading is accomplished by taking both S0 and S1 high. This places the 3-state outputs in a high-impedance state and permits data that is applied on the I/O ports to be clocked into the register. Reading out of the register can be accomplished while the outputs are enabled in any mode. Clearing occurs when the clear (CLR\) input is low. Taking either OE1\ or OE2\ high disables the outputs but has no effect on clearing, shifting, or storage of data. |
SN74F30Single 8-input, 4.5-V to 5.5-V bipolar NAND gate | Logic | 4 | Active | These devices contain a single 8-input NAND gate. They perform the Boolean functionsorY = A\ + B\ + C\ + D\ + E\ + F\ + G\ + H\ in positive logic.
The SN54F30 is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74F30 is characterized for operation from 0°C to 70°C.
These devices contain a single 8-input NAND gate. They perform the Boolean functionsorY = A\ + B\ + C\ + D\ + E\ + F\ + G\ + H\ in positive logic.
The SN54F30 is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74F30 is characterized for operation from 0°C to 70°C. |
