SN54ABT843 Datasheet | Texas Instruments

description The ’ABT843 9-bit latches are 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. 2D 1D SN54ABT843 . . . JT OR W PACKAGE SN74ABT843 . . . DB, DW, OR NT PACKAGE (TOP VIEW) OE 1 1D 2 2D 3 3D 4 4D 5 5D 6 6D 7 7D 8 8D 9 9D 10 CLR 11 GND 12 24 VCC 23 1Q 22 2Q 21 3Q 20 4Q 19 5Q 18 6Q 17 7Q 16 8Q 15 9Q 14 PRE 13 LE SN54ABT843 . . . FK PACKAGE (TOP VIEW) 1Q 2Q The nine transparent D-type latches provide true data at the outputs. A buffered output-enable (OE) input can be used to place the nine outputs in either a normal logic state (high or low logic levels) or a high-impedance state. The outputs are also in the high-impedance state during power-up and power-down conditions. The outputs remain in the high-impedance state while the device is powered down. In the high-impedance state, the outputs neither load nor drive the bus lines significantly. The high-impedance state and increased drive provide the capability to drive bus lines without need for interface or pullup ponents. 4 3 2 1 28 27 26 3D 5 25 3Q 4D 6 24 4Q 5D 7 23 5Q NC 8 22 NC 6D 9 21 6Q 7D 10 20 7Q 8D 11 19 8Q 12 13 14 15 16 17...