TC74HCT240,244AP/AF
TOSHIBA CMOS Digital Integrated Circuit
Silicon Monolithic
TC74HCT240AP,TC74HCT240AF
TC74HCT244AP,TC74HCT244AF
Octal Bus Buffer with TTL Input Level
TC74HCT240AP/AF
Inverted, 3-State
Outputs
TC74HCT244AP/AF
Non-Inverted,
3-State Outputs
The TC74HCT240A, and HCT244A are high speed CMOS
OCTAL BUS BUFFERs fabricated with silicon gate C2MOS
technology.
They achieve the high speed operation similar to equivalent
LSTTL while maintaining the CMOS low power dissipation.
Their inputs are compatible with TTL, NMOS, and CMOS
output voltage levels. The TC74HCT240A is an inverting 3-state
buffer having two active-low output enables. The TC74HCT244A
is non-inverting 3-state buffer the HCT244A has two active-low
output enables.
These devices are designed to be used with 3-state memory
address drivers, etc.
All inputs are equipped with protection circuits against static
discharge or transient excess voltage.
Features
TC74HCT240AP, TC74HCT244AP
TC74HCT240AF, TC74HCT244AF
Weight
DIP20-P-300-2.54A
SOP20-P-300-1.27A
•
High speed: tpd = 13 ns (typ.) at VCC = 5 V
•
Low power dissipation: ICC = 4 μA (max) at Ta = 25°C
•
: 1.30 g (typ.)
: 0.22 g (typ.)
Compatible with TTL outputs: VIL = 0.8 V (max)
•
VIH = 2.0 V (min)
•
Wide interfacing ability: LSTTL, NMOS, CMOS
•
Output drive capability: 15 LSTTL loads
•
•
Symmetrical output impedance: |IOH| = IOL = 6 mA (min)
∼
Balanced propagation delays: tpLH − tpHL
•
Wide operating voltage range: VCC (opr) = 2~6 V
•
Pin and function compatible with 74LS240/244
1
2007-10-01
