TC74VHCT240,244AF/AFT/AFK
TOSHIBA CMOS Digital Integrated Circuit
Silicon Monolithic
TC74VHCT240AF,TC74VHCT240AFT,TC74VHCT240AFK
TC74VHCT244AF,TC74VHCT244AFT,TC74VHCT244AFK
Octal Bus Buffer
TC74VHCT240AF/AFT/AFK
Inverted, 3-State Outputs
TC74VHCT244AF/AFT/AFK
Non-Inverted, 3-State Outputs
The TC74VHCT240A and 244A 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 TC74VHCT240A is an inverting 3-state buffer having two
active-low output enables. The TC74VHCT244A 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.
The input voltage are compatible with TTL output voltage.
These devices may be used as a level converter for interfacing
3.3 V to 5 V system.
Input protection and output circuit ensure that 0 to 5.5 V can
be applied to the input and output (Note) pins without regard to
the supply voltage. These structure prevents device destruction
due to mismatched supply and input/output voltages such as
battery back up, hot board insertion, etc.
Note:
TC74VHCT240AF, TC74VHCT244AF
TC74VHCT240AFT, TC74VHCT244AFT
TC74VHCT240AFK, TC74VHCT244AFK
Output in off-state
Features
•
High speed: tpd = 6.1 ns (typ.) at VCC = 5 V
•
Low power dissipation: ICC = 4 μA (max) at Ta = 25°C
•
Compatible with TTL inputs: VIL = 0.8 V (max)
VIH = 2.0 V (min)
•
•
Low noise: VOLP = 1.0 V (max)
•
0.22 g (typ.)
0.08 g (typ.)
0.03 g (typ.)
Power down protection is provided on all inputs and outputs
∼
Balanced propagation delays: tpLH − tpHL
•
Weight
SOP20-P-300-1.27A:
TSSOP20-P-0044-0.65A:
VSSOP20-P-0030-0.50:
Pin and function compatible with the 74 series
(74AC/HC/F/ALS/LS etc.) 240/244 type.
1
2008-12-01
