This datasheet introduces the features and characteristics of SN54ALS841/SN54AS841/SN54ALS842/SN54AS842/SN74ALS841/SN74AS841/SN74ALS842/SN74AS842 10-bit bus interface D-type latches.
The document describes the SN54ALS841, SN54AS841, SN54ALS842, SN54AS842, SN74ALS841, SN74AS841, SN74ALS842, and SN74AS842 devices. These are 10-bit bus interface D-type latches featuring 3-state outputs designed to drive highly-capacitive or low-impedance loads directly without the need for interface components.
| Supply Voltage (VCC) | 4.5 V to 5.5 V |
|---|---|
| Setup Time (Data before Clock) | 16 ns (Min) / 10 ns (Typ) |
| Hold Time (Data after Clock) | 7 ns (Min) / 5 ns (Typ) |
The ALS841 and AS841 have noninverting data (D) inputs, whereas the ALS842 and AS842 have inverting D inputs.
Package options include Plastic Small Outline Packages, both Plastic and Ceramic Chip Carriers, and Standard Plastic and Ceramic 300-mil DIPs.
Yes, the 3-state buffer-type outputs are designed specifically for driving highly-capacitive or relatively low-impedance loads.