TC74VHC240,244F/FT/FK
TOSHIBA CMOS Digital Integrated Circuit
Silicon Monolithic
TC74VHC240F,TC74VHC240FT,TC74VHC240FK
TC74VHC244F,TC74VHC244FT,TC74VHC244FK
Octal Bus Buffer
TC74VHC240F/FT/FK
Inverted, 3-State Outputs
TC74VHC244F/FT/FK
Non-Inverted, 3-State Outputs
The TC74VHC240 and 244 are advanced high speed CMOS
OCTAL BUS BUFFERs fabricated with silicon gate C2MOS
technology.
They achieve the high speed operation similar to equivalent
Bipolar Schottky TTL while maintaining the CMOS low power
dissipation.
The 74VHC240 is an inverting 3-state buffer having two
active-low output enables. The TC74VHC244 is a non-inverting
3-state buffer, and has two active-low output enables.
These devices are designed to be used with 3-state memory
address drivers, etc.
An input protection circuit ensures that 0 to 5.5 V can be
applied to the input pins without regard to the supply voltage.
This device can be used to interface 5 V to 3 V systems and two
supply systems such as battery back up. This circuit prevents
device destruction due to mismatched supply and input voltages.
TC74VHC240F, TC74VHC244F
TC74VHC240FT, TC74VHC244FT
TC74VHC240FK, TC74VHC244FK
Features
•
High speed: tpd = 3.9 ns (typ.) at VCC = 5 V
•
Low power dissipation: ICC = 4 μA (max) at Ta = 25°C
•
High noise immunity: VNIH = VNIL = 28% VCC (min)
•
•
Power down protection is provided on all inputs.
∼
Balanced propagation delays: tpLH − tpHL
•
Wide operating voltage range: VCC (opr) = 2 to 5.5 V
•
Low noise: VOLP = 0.8 V (max)
•
Pin and function compatible with 74ALS240/244
Weight
SOP20-P-300-1.27A
: 0.22 g (typ.)
TSSOP20-P-0044-0.65A
1
: 0.08 g (typ.)
VSSOP20-P-0030-0.50
: 0.03 g (typ.)
2009-04-01
