TC74ACT240,244P/F/FT
2014-03-01
1
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC74ACT240P, TC74ACT240F, TC74ACT240FT
TC74ACT244P, TC74ACT244F, TC74ACT244FT
Octal Bus Buffer
TC74ACT240P/F/FT Inverted, 3-State
Outputs
TC74ACT244P/F/FT Non-Inverted, 3-State
Outputs
The TC74ACT240 and 244 are advanced high speed CMOS
OCTAL BUS BUFFERs fabricated with silicon gate and
double-layer metal wiring C
2
MOS technology.
They achieve the high speed operation similar to equivalent
Bipolar Schottky TTL while maintaining the CMOS low power
dissipation.
The 74ACT240 is an inverting 3-state buffer while the
74ACT244 is non-inverting. Both devices have two active-low
output enables.
These devices are designed to be used in such applications as
3-state memory address drivers.
All inputs are equipped with protection circuits against static
discharge or transient excess voltage.
Features
• High speed: t
pd
= 5.0 ns (typ.) at V
CC
= 5 V
• Low power dissipation: I
CC
= 8 μA (max) at Ta = 25°C
• Compatible with TTL outputs: V
IL
= 0.8 V (max)
V
IH
= 2.0 V (min)
• Symmetrical output impedance: |I
OH
| = I
OL
= 24 mA (min)
Capability of driving 50 Ω
transmission lines.
• Balanced propagation delays: t
pLH
∼
−
t
pHL
• Pin and function compatible with 74F240/244
TC74ACT240P, TC74ACT244P
TC74ACT240F, TC74ACT244F
TC74ACT240FT, TC74ACT244FT
Weight
DIP20-P-300-2.54A : 1.30 g (typ.)
SOP20-P-300-1.27A : 0.22 g (typ.)
TSSOP20-P-0044-0.65A : 0.08 g (typ.)
Start of commercial production
1988-10
