Octal D-type Edge-triggered Flip-Flops (with three-state outputs)
The HD74LS374, 8-bit register features totem-pole three-state outputs designed specifically for driving highly-
capacitive or relatively low-impedance loads. The high-impedance third state and increased high-logic-level drive
provide this register 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 flip-flops are edge-triggered D-type flip-
flops. On the positive transition the clock, the Q outputs will be set to the logic states that ware setup at the D inputs.
• Ordering Information
Package Code Package
(Previous Code) Abbreviation
HD74LS374FPEL SOP-20 pin (JEITA)
HD74LS374RPEL SOP-20 pin (JEDEC)
Note: Please consult the sales office for the above package availability.
EL (2,000 pcs/reel)
EL (1,000 pcs/reel)
Rev.2.00, Feb.18.2005, page 1 of 7