MC74VHCT240A_11 Datasheet, PDF (2/7 Pages) ON Semiconductor – Octal Bus Buffer/Line Driver Inverting with 3−State Outputs

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
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _{MAXIMUM RATINGS}
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ Symbol
Parameter
Value
Unit
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ V_CC DC Supply Voltage
– 0.5 to + 7.0
V
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ V_in DC Input Voltage
– 0.5 to + 7.0
V
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ V_out DC Output Voltage
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 Packages†
500
mW
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _{TSSOP Packageâ€} 
450
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _{Tstg StorageTemperature}
– 65 to + 150
_C
Maximum ratings are those values beyond which device damage can occur. Maximum ratings
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.
applied to the device are individual stress limit values (not normal operating conditions) and are
not valid simultaneously. If these limits are exceeded, device functional operation is not implied,
damage may occur and reliability may be affected.
†Derating − SOIC Packages: – 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
5.5
V
0
V_CC
− 40
+ 85 _C
0
20 ns/V
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