54BCT244 | 8-bit Octal Driver/Buffer, 8-bit
The 54BCT244 octal buffers and line drivers features a greater than 100 krad (Si) total dose tolerance; depending upon space mission. The 54BCT244 is organized as two 4-bit drivers with separate output enable (OE) inputs. When OE is low, the device passes data from the A inputs to the Y outputs. When OE is high, the outputs are in the high impedance state.

54BCT245 | Octal Transceiver
The 54BCT245 octal bus transceiver features a greater than 100 krad (Si) total dose tolerance. Designed specifically for asynchronous communication between data buses, the 54BCT245 transmits data from the A bus to the B bus or from the B bus to the A bus depending upon the level at the direction-control (DIR) input. The output-enable (OE) input can be used to disable the device so the buses are effectively isolated.

54HC4046 | Phase-Locked Loop
The 54HC4046 high speed Phase Lock Loop microcircuit features a 100 kilorad (Si) total dose tolerance. This device uses advanced CMOS technology to obtain high frequency operation. The 54HC4046 contains a low power linear voltage controlled oscillator (VCO), a source follower, and three phase comparators. The three phase comparators have a common signal input and a common comparator input. The signal input has a self biasing amplifier allowing signals to be either capacitively coupled to the phase comparators with a small signal or directly coupled with standard input logic levels. Any one of the three comparators feeds an external filter network, which in turn feeds the VCO input. This input is a very high impedance CMOS input that also drives the source follower. An inhibit pin is provided to disable the VCO and the source follower, providing a method of putting the IC in a low power state. Capable of surviving space environments, the 54HC4046 is ideal for many satellite, spacecraft, and space probe missions. The 54BCT245 octal bus transceiver features a greater than 100 krad (Si) total dose tolerance and is designed specifically for asynchronous communication between data buses. The 54BCT245 transmits data from the A bus to the B bus or from the B bus to the A bus depending upon the level at the direction-control (DIR) input. The output-enable (OE) input can be used to disable the device so the buses are effectively isolated.

54HC4049 | HEX Inverting Buffer
The 54HC4049 high speed CMOS Logic Hex Inverting Buffers features a greater than 100 krad(Si) total dose tolerance, depending upon space mission. These parts have a modified input protection structure that enables them to be used as logic level translators which will convert high level logic to a low-level logic while operating off the low-level logic supply. For example, 15V input pulse levels can be down-converted to 0V to 5V logic levels. The modified input protection structure protects the input from negative electrostatic discharge. The 54HC4049 can be used as simple buffers or inverters without level translation.

54HC4050 | HEX Non-Inverting Buffer
The 54HC4050 high speed CMOS Logic Hex Non-Inverting Buffers features a greater than 100 krad(Si) total dose tolerance, depending upon space mission. These parts have a modified input protection structure that enables them to be used as logic level translators which will convert high-level logic to a low-level logic while operating off the low-level logic supply. For example, 15V input pulse levels can be down-converted to 0V to 5V logic levels. The modified input protection structure protects the input from negative electrostatic discharge. The 54HC4050 can be used as simple buffers or inverters without level translation.

54LVTH162244 | 3.3V Octal Driver/Buffer
The 54LVTH162244 devices are 16-bit buffers and line drivers designed for low-voltage (3.3V) VCC operation, but with the capability to provide a TTL interface to a 5V system environment. These devices can be used as four 4-bit buffers, two 8-bit buffers, or one 16-bit buffer. These devices provide true outputs and symmetrical active-low output-enable (OE) inputs. The outputs, which are designed to source or sink up to 12 mA, include equivalent 22-. series resistors to reduce overshoot and undershoot. Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level.

54LVTH162373 | 3.3V Transparent D-Type Latches
The 54LVTH162373 16-bit transparent Dtype latches with 3-state output features a greater than 100 krad (Si) total dose tolerance, depending upon space mission. The 54LVTH162373 is designed for low voltage (3.3V) VCC operation, but with the capability to provide a TTL interface to a 5V system environment. It is suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers. The 54LVTH162373 can be used as two 8-bit latches or one 16-bit latch. When the latch-enable (LE) input is low, the Q output are latched at the levels set up at the data (D) inputs. When LE is high, the Q outputs follow the D inputs. A buffered output-enable (OE) input can be used to place the eight outputs in either a normal logic state or a high impedance state. In the high impedance state, the outputs neither load nor drive the bus lines significantly. The high impedance state and the increased drive provide the capability to drive bus lines without the need for interface or pullup components. OE does not affect internal operations of the latch. Old data can be retained or new data can be entered while the outputs are in the high impedance state.