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
C
2
MOS 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:
Output in off-state
TC74VHCT240AF, TC74VHCT244AF
TC74VHCT240AFT, TC74VHCT244AFT
TC74VHCT240AFK, TC74VHCT244AFK
Features
•
•
•
•
•
•
•
High speed: t
pd
=
6.1 ns (typ.) at V
CC
=
5 V
Low power dissipation: I
CC
=
4
μA
(max) at Ta = 25°C
Compatible with TTL outputs: V
IL
=
0.8 V (max)
V
IH
=
2.0 V (min)
Power down protection is provided on all inputs and outputs
Balanced propagation delays: t
pLH
∼
t
pHL
−
Low noise: V
OLP
=
1.0 V (max)
Pin and function compatible with the 74 series
(74AC/HC/F/ALS/LS etc.) 240/244 type.
Weight
SOP20-P-300-1.27A
TSSOP20-P-0044-0.65A
VSSOP20-P-0030-0.50
: 0.22 g (typ.)
: 0.08 g (typ.)
: 0.03 g (typ.)
1
2007-10-01
TOSHIBA [ TOSHIBA SEMICONDUCTOR ]
