DM74ALS563A

DM74ALS563A Octal D-Type Transparent Latch with 3-STATE Output

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DM74ALS563A Octal D-Type Transparent Latch with 3-STATE Output

May 2007

DM74ALS563A Octal D-Type Transparent Latch with 3-STATE Output
Features
Switching specifications at 50pF Switching specifications guaranteed over full

General Description
These 8-bit registers feature totem-pole 3-STATE outputs designed specifically for driving highly-capacitive or relatively low-impedance loads. The high-impedance state and increased high-logic-level drive provide these registers with the capability of being connected directly to and driving the bus lines in a bus-organized system without need for interface or pull-up components. They are particularly attractive for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers. The eight inverting latches of the DM74ALS563A are transparent D-type latches. While the enable (G) is HIGH the Q outputs will follow the data (D) inputs. When the enable is taken LOW the output will be latched at the complement of the level of the data that was set up. A buffered output control 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 highimpedance state the outputs neither load nor drive the bus lines signific
antly. The output control does not affect the internal operation of the latches. That is, the old data can be retained or new data can be entered even while the outputs are OFF.

temperature and VCC range
Advanced oxide-isolated, ion-implanted Schottky TTL

process
3-STATE buffer-type outputs drive bus lines directly

Ordering Information
Order Number
DM74ALS563AWM

Package Number
M20B

Package Description
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide

Devices also available in Tape and Reel. Specify by appending the suffix letter "X" to the ordering number.

1986 Fairchild Semiconductor Corporation DM74ALS563A Rev. 1.2

www.fairchildsemi.com