SN74ABT16843 Datasheet | Texas Instruments

description The ’ABT16843 18-bit bus-interface D-type 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. The ’ABT16843 can be used as two 9-bit latches or one 18-bit latch. The 18 latches are transparent D-type latches. The device provides true data at its 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 in the high-impedance state during power up and power down. 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. SN54ABT16843, SN74ABT16843 18-BIT BUS-INTERFACE D-TYPE LATCHES WITH 3-STATE OUTPUTS SCBS223E - OCTOBER 1992 - REVISED MAY 1997 SN54ABT16843 . . . WD PACKAGE SN74ABT16843 . . . DGG OR DL PACKAGE (TOP VIEW) 1CLR 1 1OE 2 1Q1 3 GND 4 1Q2 5 1Q3 6 VCC 7 1Q4 8 1Q5 9 1Q6 10 GND 11 1Q7 12 1Q8 13 1Q9 14 2Q1 15 2Q2 16 2Q3 17 GND 18 2Q4 19 2Q5 20 2Q6 21 VCC 22 2Q7 23 2Q8 24 GND 25 2Q9 26 2OE 27 2CLR 28 56 1LE 55 1PRE 54 1D1 53 GND 52 1D2 51 1D3 50 VCC 49 1D4 48 1D5 47 1D6 46 GND 45 1D7 44 1D8 43 1D9 42 2D1 41 2D2 40 2D3 39 GND 38 2D4 37 2D5 36 2D6 35 VCC 34 2D7 33 2D8 32 GND 31 2D9 30 2PRE 29 2LE Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. Widebus and EPIC-ΙΙB are trademarks of Texas Instruments Incorporated. UNLESS OTHERWISE NOTED this document contains PRODUCTION DATA information current as of publication date. Products conform...