IN74ACT299

1

High-Speed Silicon-Gate CMOS

The IN74ACT299 is identical in pinout to the LS/ALS299,

HC/HCT299. The IN74ACT299 may be used as a level converter

for interfacing TTL or NMOS outputs to High Speed CMOS inputs.

The IN74ACT299 features a multiplexed parallel input/output

data port to achieve full 8-bit handling in a 20 pin package. Due to

the large output drive capability and the 3-state feature, this

device is ideally suited for interface with bus lines in a bus-

oriented system.

Two Mode-Select inputs and two Output Enable inputs are

used to choose the mode of operation as listed in the Function

Table. Synchronous parallel loading is accomplished by taking

the high-impedance state, which permits data applied to the data

port to be clocked into the register. Reading out of the register can

be accomplished when the outputs are enabled. The active-low

asynchronous Reset overrides all other inputs.

• TTL/NMOS Compatible Input Levels

• Outputs Directly Interface to CMOS, NMOS, and TTL

• Operating Voltage Range: 4.5 to 5.5 V

• Low Input Current: 1.0 µA; 0.1 µA @ 25°C

• Outputs Source/Sink 24 mA

ORDERING INFORMATION

IN74ACT299N Plastic

IN74ACT299DW SOIC

packages

PIN ASSIGNMENT

LOGIC DIAGRAM

PIN 10 = GND