MC74VHCT126A_11 Datasheet, PDF (2/7 Pages) ON Semiconductor – Quad Bus Buffer with 3−State Control Inputs

MC74VHCT126A
A1
2
OE1
1
5
A2
OE2
4
9
A3
OE3 ¹⁰
12
A4
OE4 ¹³
3
Y1
6
Y2
8 _Y3
11
Y4
Figure 1. LOGIC DIAGRAM
Active−High Output Enables
OE1 1
A1 2
Y1 3
OE2 4
A2 5
Y2 6
GND 7
14 V_CC
13 OE4
12 A4
11 Y4
10 OE3
9 A3
8 Y3
Figure 2. PIN ASSIGNMENT
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _{MAXIMUM RATINGS}
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _Rating
Symbol
Value
Unit
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ DC Supply Voltage
V_CC
– 0.5 to + 7.0
V
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ^{DC Input Voltage}
V_in
– 0.5 to + 7.0
V
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ^{DC Output Voltage}
Output in 3−State V_out
– 0.5 to + 7.0
V
High or Low State
– 0.5 to V_CC + 0.5
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _{Input Diode Current}
I_IK
− 20
mA
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _{Output Diode Current (VOUT < GND; VOUT > VCC)}
I_OK
± 20
mA
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _{DC Output Current, per Pin}
I_out
± 25
mA
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _{DC Supply Current, VCC and GND Pins}
I_CC
± 75
mA
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _{Power Dissipation in Still Air, SOIC Packagesâ€} 
P_D
TSSOP Package†
500
mW
450
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _{Storage Temperature}
T_stg
– 65 to + 150
_C
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _{Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress}
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _{ratings only. Functional operation above the Recommended Operating Conditions is not implied.}
Extended exposure to stresses above the Recommended Operating Conditions may affect device
reliability.
†Derating — SOIC Packages: – 7 mW/_C from 65_ to 125_C
TSSOP Package: − 6.1 mW/_C from 65_ to 125_C
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.
RECOMMENDED OPERATING CONDITIONS
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _Parameter
Symbol Min
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ DC Supply Voltage
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ^{DC Input Voltage}
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ^{DC Output Voltage}
V_CC
4.5
V_in
0
Output in 3−State V_out
0
High or Low State
0
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _{Operating Temperature}
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _{Input Rise and Fall Time}
T_A
V_CC = 5.0 V ±0.5 V
t_r, t_f
− 40
0
Max
5.5
5.5
5.5
V_CC
+ 85
20
Unit
V
V
V
_C
ns/V
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