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Toshiba Electronic Components Datasheet

TC74VHCT244AFK Datasheet

OCTAL BUS BUFFER

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TC74VHCT244AFK pdf
TC74VHCT240,244AF/AFW/AFT/AFK
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC74VHCT240AF,TC74VHCT240AFW,TC74VHCT240AFT,TC74VHCT240AFK
TC74VHCT244AF,TC74VHCT244AFW,TC74VHCT244AFT,TC74VHCT244AFK
Octal Bus Buffer
TC74VHCT240AF/AFW/AFT/AFK
Inverted, 3-State Outputs
TC74VHCT244AF/AFW/AFT/AFK
Non-Inverted, 3-State Outputs
Note: xxxFW (JEDEC SOP) is not available in
Japan.
TC74VHCT240AF, TC74VHCT244AF
The TC74VHCT240A and 244A are advanced high speed
CMOS OCTAL BUS BUFFFERs 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: 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 outputs: VIL = 0.8 V (max)
VIH = 2.0 V (min)
Power down protection is provided on all inputs and outputs
Balanced propagation delays: tpLH ∼− tpHL
Low noise: VOLP = 1.0 V (max)
Pin and function compatible with the 74 series
(74AC/HC/F/ALS/LS etc.) 240/244 type.
TC74VHCT240AFW, TC74VHCT244AFW
TC74VHCT240AFT, TC74VHCT244AFT
TC74VHCT240AFK, TC74VHCT244AFK
Weight
SOP20-P-300-1.27A
: 0.22 g (typ.)
SOP20-P-300-1.27
: 0.22 g (typ.)
SOL20-P-300-1.27
: 0.46 g (typ.)
TSSOP20-P-0044-0.65A : 0.08 g (typ.)
VSSOP20-P-0030-0.50 : 0.03 g (typ.)
1
2006-06-01


Toshiba Electronic Components Datasheet

TC74VHCT244AFK Datasheet

OCTAL BUS BUFFER

No Preview Available !

TC74VHCT244AFK pdf
Pin Assignment
1G 1
1A1 2
2Y4 3
1A2 4
2Y3 5
1A3 6
2Y2 7
1A4 8
2Y1 9
GND 10
TC74VHCT240A
(top view)
20 VCC
19 2G
18 1Y1
17 2A4
16 1Y2
15 2A3
14 1Y3
13 2A2
12 1Y4
11 2A1
IEC Logic Symbol
1G (1)
1A1 (2)
1A2 (4)
1A3 (6)
1A4 (8)
TC74VHCT240A
EN
(18) 1Y1
(16) 1Y2
(14) 1Y3
(12) 1Y4
2G (19) EN
2A1 (11)
2A2 (13)
2A3 (15)
2A4 (17)
Truth Table
Inputs
G An
LL
LH
HX
Outputs
Yn Yn
LH
HL
ZZ
X: Don’t care
Z: High impedance
Yn: TC74VHCT244A
Yn : TC74VHCT240A
(9) 2Y1
(7) 2Y2
(5) 2Y3
(3) 2Y4
TC74VHCT240,244AF/AFW/AFT/AFK
1G 1
1A1 2
2Y4 3
1A2 4
2Y3 5
1A3 6
2Y2 7
1A4 8
2Y1 9
GND 10
TC74VHCT244A
(top view)
20 VCC
19 2G
18 1Y1
17 2A4
16 1Y2
15 2A3
14 1Y3
13 2A2
12 1Y4
11 2A1
1G (1)
1A1 (2)
1A2 (4)
1A3 (6)
1A4 (8)
TC74VHCT244A
EN
(18) 1Y1
(16) 1Y2
(14) 1Y3
(12) 1Y4
2G (19) EN
2A1 (11)
2A2 (13)
2A3 (15)
2A4 (17)
(9) 2Y1
(7) 2Y2
(5) 2Y3
(3) 2Y4
2 2006-06-01


Part Number TC74VHCT244AFK
Description OCTAL BUS BUFFER
Maker Toshiba
Total Page 11 Pages
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