TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
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
double-layer metal wiring C2MOS technology.
It achieves the high speed operation similar to equivalent
Bipolar Schottky TTL while maintaining the CMOS low power
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 ( G1 , G2 ) 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)
• High speed: fmax = 130 MHz (typ.) at VCC = 5 V
• Low power dissipation: ICC = 8 μA (max) at Ta = 25°C
• Compatible with TTL outputs: VIL = 0.8 V (max)
VIH = 2.0 V (min)
• Symmetrical output impedance: |IOH| = IOL = 24 mA (min)
Capability of driving 50 Ω
• Balanced propagation delays: tpLH ∼− tpHL
• Pin and function compatible with 74F299
: 1.30 g (typ.)
: 0.22 g (typ.)
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
Start of commercial production