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Toshiba Electronic Components Datasheet

TC74VHC240FW Datasheet

OCTAL BUS BUFFER

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TC74VHC240,244F/FW/FT/FK
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC74VHC240F,TC74VHC240FW,TC74VHC240FT,TC74VHC240FK
TC74VHC244F,TC74VHC244FW,TC74VHC244FT,TC74VHC244FK
Octal Bus Buffer
TC74VHC240F/FW/FT/FK
Inverted, 3-State Outputs
TC74VHC244F/FW/FT/FK
Non-Inverted, 3-State Outputs
Note: xxxFW (JEDEC SOP) is not available in
Japan.
TC74VHC240F, TC74VHC244F
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.
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 = 0.9 V (max)
Pin and function compatible with 74ALS240/244
TC74VHC240FW, TC74VHC244FW
TC74VHC240FT, TC74VHC244FT
TC74VHC240FK, TC74VHC244FK
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 2006-02-01


Toshiba Electronic Components Datasheet

TC74VHC240FW Datasheet

OCTAL BUS BUFFER

No Preview Available !

Pin Assignment
1G 1
1A1 2
2Y4 3
1A2 4
2Y3 5
1A3 6
2Y2 7
1A4 8
2Y1 9
GND 10
TC74VHC240
(top view)
Iec Logic Symbol
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)
TC74VHC240
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: TC74VHC244
Yn : TC74VHC240
(9) 2Y1
(7) 2Y2
(5) 2Y3
(3) 2Y4
TC74VHC240,244F/FW/FT/FK
1G 1
1A1 2
2Y4 3
1A2 4
2Y3 5
1A3 6
2Y2 7
1A4 8
2Y1 9
GND 10
TC74VHC244
(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)
TC74VHC244
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 2006-02-01


Part Number TC74VHC240FW
Description OCTAL BUS BUFFER
Maker Toshiba
Total Page 12 Pages
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