74F374 Datasheet | Texas Instruments

description These 8-bit flip-flops feature 3-state outputs designed specifically for driving highly capacitive or relatively low-impedance loads. They are particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers. SN54F374 . . . J PACKAGE SN74F374 . . . DB, DW, OR N PACKAGE (TOP VIEW) OE 1 1Q 2 1D 3 2D 4 2Q 5 3Q 6 3D 7 4D 8 4Q 9 GND 10 20 VCC 19 8Q 18 8D 17 7D 16 7Q 15 6Q 14 6D 13 5D 12 5Q 11 CLK SN54F374 . . . FK PACKAGE (TOP VIEW) 8Q 1Q 1D The eight flip-flops of the ′F374 are edge-triggered D-type flip-flops. On the positive transition of the clock (CLK) input, the Q outputs are set to the logic levels that were set up at the data (D) inputs. A buffered output enable (OE) input can be used to place the eight outputs in either a normal logic state (high or low) 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 need for interface or pullup ponents. 4Q 3 2 1 20 19 2D 4 18 8D 2Q 5 17 7D 3Q 6 16 7Q 3D 7 15 6Q 4D 8 14 6D 9 10 11 12 13 5Q 5D The output enable (OE) input does not affect internal operations of the flip-flop. Old data can be retained or new data can be entered while the outputs are in the high-impedance state. The SN74F374 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 SN54F374 is characterized for operation over the full military temperature range of - 55°C to 125°C. The SN74F374 is characterized for operation from 0°C to 70°C. FUNCTION TABLE (each flip-flop) INPUTS OE CLK...