Datasheet4U Logo Datasheet4U.com

SN74ALS990 - 8-BIT D-TYPE TRANSPARENT READ-BACK LATCH

General Description

This 8-bit latch is designed specifically for storing the contents of the input data bus and providing the capability of reading back the stored data onto the input data bus.

📥 Download Datasheet

Other Datasheets by Texas Instruments

Part Number Description
SN74ALS992 9-BIT D-TYPE TRANSPARENT READ-BACK LATCH
SN74ALS996 8-Bit D-Type Edge-Triggered Read-Back Latches
SN74ALS00A Quadruple 2-Input Positive-NAND Gates
SN74ALS02A Quadruple 2-Input Positive-NOR Gates
SN74ALS03B Quadruple 2-Input Positive-NAND Buffer
SN74ALS04B Hex Inverters
SN74ALS05A HEX INVERTER
SN74ALS08 Quadruple 2-Input Positive-AND Gates
SN74ALS09 QUADRUPLE 2-INPUT POSITIVE-AND GATE
SN74ALS1002A Quadruple 2-Input Positive-NOR Buffer

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
SN74ALS990 8-BIT D-TYPE TRANSPARENT READ-BACK LATCH SDAS027B – APRIL 1984 – REVISED JANUARY 1995 • 3-State I/O-Type Read-Back Inputs • Bus-Structured Pinout • True Logic Outputs • Package Options Include Plastic Small-Outline (DW) Packages and Standard Plastic (N) 300-mil DIPs description This 8-bit latch is designed specifically for storing the contents of the input data bus and providing the capability of reading back the stored data onto the input data bus. DW OR N PACKAGE (TOP VIEW) OERB 1 1D 2 2D 3 3D 4 4D 5 5D 6 6D 7 7D 8 8D 9 GND 10 20 VCC 19 1Q 18 2Q 17 3Q 16 4Q 15 5Q 14 6Q 13 7Q 12 8Q 11 LE The eight latches are transparent D-type latches. While the latch-enable (LE) input is high, the Q outputs follow the data (D) inputs.