TC74ACT299P/F

2007-10-01

1

TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic

TC74ACT299P,TC74ACT299F

8-Bit PIPO Shift Register with Asynchronous Clear

The TC74ACT299 is an advanced high speed CMOS 8-BIT

PIPO SHIFT REGISTER fabricated with silicon gate and

It achieves the high speed operation similar to equivalent

Bipolar Schottky TTL while maintaining the CMOS low power

dissipation.

This device may be used as a level converter for interfacing

TLL or NMOS to High Speed CMOS. The inputs are compatible

with TTL, NMOS and CMOS output voltage levels.

It has a four modes (HOLD, SHIFT LEFT, SHIFT RIGHT and

LOAD DATA) controlled by the two selection inputs (S0, S1).

When one or both enable ( 1

G ,

2

G ) are high, the eight I/O

outputs are forced to the high-impedance state; however,

sequential operation or clearing of the register is not affected.

All inputs are equipped with protection circuits against static

discharge or transient excess voltage.

Features (Note 1)(Note 2)

Capability of driving 50

Ω

transmission lines.

• Pin and function compatible with 74F299

Note 1: Do not apply a signal to any bus terminal when it is in the output mode. Damage may result.

Note 2: All floating (high impedance) bus terminals must have their input levels fixed by means of pull up or pull

down resistors.

Pin Assignment

TC74ACT299P

TC74ACT299F

Weight

DIP20-P-300-2.54A

: 1.30 g (typ.)

SOP20-P-300-1.27A

: 0.22 g (typ.)