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SN74F373DWRG4 Datasheet(PDF) 1 Page - Texas Instruments |
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SN74F373DWRG4 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 16 page SN54F373, SN74F373 OCTAL TRANSPARENT D-TYPE LATCHES WITH 3-STATE OUTPUTS SDFS076A – D2932, MARCH 1987 – REVISED OCTOBER 1993 Copyright © 1993, Texas Instruments Incorporated 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 • Eight Latches in a Single Package • 3-State Bus-Driving True Outputs • Full Parallel Access for Loading • Buffered Control Inputs • Package Options Include Plastic Small-Outline (SOIC) and Shrink Small-Outline (SSOP) Packages, Ceramic Chip Carriers, and Plastic and Ceramic DIPs description These 8-bit latches 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. The eight latches of the ′F373 are transparent D-type latches. While the latch-enable (LE) input is high, the Q outputs will follow the data (D) inputs. When the latch enable 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 logic levels) 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 increased drive provide the capability to drive bus lines without need for interface or pullup components. The output-enable (OE) input does not affect the internal operations of the latches. Old data can be retained or new data can be entered while the outputs are in the high-impedance state. The SN74F373 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 SN54F373 is characterized for operation over the full military temperature range of – 55 °C to 125°C. The SN74F373 is characterized for operation from 0 °C to 70°C. FUNCTION TABLE (each latch) INPUTS OUTPUT OE LE D Q L H H H L HL L L LX Q0 H X X Z 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 OE 1Q 1D 2D 2Q 3Q 3D 4D 4Q GND VCC 8Q 8D 7D 7Q 6Q 6D 5D 5Q LE SN54F373 ...J PACKAGE SN74F373 ... DB, DW, OR N PACKAGE (TOP VIEW) 3 2 1 20 19 9 10 11 12 13 4 5 6 7 8 18 17 16 15 14 2D 2Q 3Q 3D 4D SN54F373 . . . FK PACKAGE (TOP VIEW) 8D 7D 7Q 6Q 6D PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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