MC74VHCT240A_15 Datasheet, PDF (2/6 Pages) ON Semiconductor – Octal Bus Buffer/Line Driver

MC74VHCT240A
A1 ²
A2 ⁴
18 _YA1
16 _YA2
OEA 1
A1 2
YB4 3
20 V_CC
19 OEB
18 YA1
A3 ⁶
DATA
INPUTS
A4 ⁸
B1 ¹¹
14 _YA3
12 _YA4
9 _YB1
INVERTING
OUTPUTS
A2 4
YB3 5
A3 6
YB2 7
A4 8
17 B4
16 YA2
15 B3
14 YA3
13 B2
B2 ¹³
B3 ¹⁵
B4 ¹⁷
7 _YB2
5 _YB3
3 _YB4
YB1 9
GND 10
12 YA4
11 B1
Figure 2. Pin Assignment
FUNCTION TABLE
INPUTS
OUTPUTS
OUTPUT OEA ¹
ENABLES _OEB ¹⁹
Figure 1. Logic Diagram
OEA, OEB
L
L
H
A, B
L
H
X
YA, YB
H
L
Z
MAXIMUM RATINGS
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _Symbol
Parameter
Value
Unit
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _{VCC DC Supply Voltage}
– 0.5 to + 7.0
V
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _{Vin DC Input Voltage}
– 0.5 to + 7.0
V
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _{Vout DCOutputVoltage}
Output in 3−State – 0.5 to + 7.0
V
High or Low State – 0.5 to V_CC + 0.5
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _{IIK Input Diode Current}
− 20
mA
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _{IOK Output Diode Current (VOUT < GND; VOUT > VCC)}
± 20
mA
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _{Iout DC Output Current, per Pin}
± 25
mA
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _{ICC DC Supply Current, VCC and GND Pins}
± 75
mA
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _{PD Power Dissipation in Still Air,}
SOIC Package†
500
mW
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ^{TSSOP Packageâ€} 
450
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ^Tstg ^{Storage Temperature}
– 65 to + 150
_C
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ^{Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any}
This device contains protection
circuitry to guard against damage
due to high static voltages or electric
fields. However, precautions must
be taken to avoid applications of any
voltage higher than maximum rated
voltages to this high−impedance cir-
cuit. For proper operation, V_in and
V_out should be constrained to the
range GND v (V_in or V_out) v V_CC.
Unused inputs must always be
tied to an appropriate logic voltage
level (e.g., either GND or V_CC).
Unused outputs must be left open.
of these limits are exceeded, device functionality should not be assumed, damage may occur
and reliability may be affected.
†Derating − SOIC Package: – 7 mW/_C from 65_ to 125_C
TSSOP Package: − 6.1 mW/_C from 65_ to 125_C
RECOMMENDED OPERATING CONDITIONS
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _Symbol
Parameter
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _{VCC DCSupplyVoltage}
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _{Vin DCInputVoltage}
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _{Vout DCOutputVoltage}
Output in 3−State
High or Low State
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _{TA Operating Temperature}
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _{tr,tf InputRiseandFallTime}
V_CC =5.0V ±0.5V
Min
Max Unit
4.5
5.5
V
0
5.5
V
0
0
− 40
5.5
V
V_CC
+ 85 _C
0
20 ns/V
Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond
the Recommended Operating Ranges limits may affect device reliability.
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