MC74VHCT573A
Octal D-Type Latch
with 3-State Output
The MC74VHCT573A is an advanced high speed CMOS octal latch
with 3state output fabricated with silicon gate CMOS technology. It
achieves high speed operation similar to equivalent Bipolar Schottky
MC74VHCT573A
219 1 20 V
OE CC
D0 Q0
3 18
D0 2 19 Q0
D1 Q1
4 17
D1 3 18 Q1
D2 Q2
5 16
NONINVERTING
DATA D2 4 17 Q2
D3 Q3
6 15 OUTPUTS
INPUTS
D4 Q4
D3 5 16 Q3
7 14
D5 Q5
D4 6 15 Q4
8 13
D6 Q6
D5 7 14 Q5
9 12
D7 Q7
D6 8 13 Q6
11
LE D7 9 12 Q7
1
GND 10 11
LE
OE
Figure 1. Logic Diagram
Figure 2. Pin Assignment
MAXIMUM RATINGS
Symbol Parameter Value Unit
This device contains protection
circuitry to guard against damage
V DC Supply Voltage 0.5 to + 7.0 V
CC
due to high static voltages or electric
V DC Input Voltage 0.5 to + 7.0 V
fields. However, precautions must
in
be taken to avoid applications of any
V DC Output Voltage Outputs in 3State 0.5 to + 7.0 V
out
voltage higher than maximum rated
High or Low State 0.5 to V + 0.5
CC
voltages to this highimpedance cir-
I Input Diode Current 20 mA cuit. For proper operation, V and
in
IK
V should be constrained to the
out
I Output Diode Current (V < GND; V > V ) 20 mA
OK OUT OUT CC
range GND (V or V ) V .
in out CC
Unused inputs must always be
I DC Output Current, per Pin 25 mA
out
tied to an appropriate logic voltage
I DC Supply Current, V and GND Pins 75 mA
CC CC
level (e.g., either GND or V ).
CC
Unused outputs must be left open.
P Power Dissipation in Still Air, SOIC Package 500 mW
D
TSSOP Package 450
T Storage Temperature 65 to + 150
C
stg
Maximum ratings are those values beyond which device damage can occur. Maximum ratings
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 125C
TSSOP Package: 6.1 mW/C from 65 to 125C
RECOMMENDED OPERATING CONDITIONS
Symbol Parameter Min Max Unit
V DC Supply Voltage 4.5 5.5 V
CC
V DC Input Voltage 0 5.5 V
in
V DC Output Voltage Outputs in 3State 0 5.5 V
out
High or Low State 0 V
CC
T Operating Temperature 40+ 85 C
A
t , t Input Rise and Fall Time V =5.0V 0.5V 0 20 ns/V
r f CC