SN54ALS373 Datasheet | Texas Instruments

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. SN54ALS373, SN54AS373 . . . J PACKAGE SN74ALS373A, SN74AS373 . . . DW OR N PACKAGE (TOP VIEW) OE 1Q 1D 2D 2Q 3Q 3D 4D 4Q GND 1 2 3 4 5 6 7 8 9 10 20 VCC 19 8Q 18 8D 17 7D 16 7Q 15 6Q 14 6D 13 5D 12 5Q 11 LE SN54ALS373, SN54AS373 . . . FK PACKAGE (TOP VIEW) 5D 8Q OE VCC GND 1Q 4Q 1D While the latch-enable (LE) input is high, the Q outputs follow the data (D) inputs. When LE is taken low, the Q outputs are latched at the logic levels set up at the 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 interface or pullup ponents. LE 5Q 2D 3 2 1 20 19 4 18 8D 2Q 5 17 7D 3Q 6 16 7Q 3D 7 15 6Q 4D 8 14 6D 9 10 11 12 13 OE does not affect internal operations of the latches. Old data can be retained or new data can be entered while the outputs are off. The SN54ALS373 and SN54AS373 are characterized for operation over the full military temperature range of - 55°C to 125°C. The SN74ALS373A and SN74AS373 are characterized for operation from 0°C to 70°C. FUNCTION TABLE (each latch) INPUTS OE LE OUTPUT Q L HH LLX...