Semiconductor Components Industries, LLC, 2000
May, 2000 – Rev. 9
1 Publication Order Number:
MC74HC573A/D
MC74HC573A
Octal 3-State Noninverting
Transpar ent Latch
High–Performance Silicon–Gate CMOS
The MC74HC573A is identical in pinout to the LS573. The devices
are compatible with standard CMOS outputs; with pullup resistors,
they are compatible with LSTTL outputs.
These latches appear transparent to data (i.e., the outputs change
asynchronously) when Latch Enable is high. When Latch Enable goes
low, data meeting the setup and hold time becomes latched.
The HC573A is identical in function to the HC373A but has the data
inputs on the opposite side of the package from the outputs to facilitate
PC board layout.
• Output Drive Capability: 15 LSTTL Loads
• Outputs Directly Interface to CMOS, NMOS and TTL
• Operating Voltage Range: 2.0 to 6.0 V
• Low Input Current: 1.0 µA
• In Compliance with the Requirements Defined by JEDEC Standard
No. 7A
• Chip Complexity: 218 FETs or 54.5 Equivalent Gates
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MARKING
DIAGRAMS
1
20
A = Assembly Location
WL = Wafer Lot
YY = Year
WW = Work Week
SOIC WIDE–20
DW SUFFIX
CASE 751D
HC573A
AWLYYWW
PDIP–20
N SUFFIX
CASE 738
1
20
MC74HC573AN
AWLYYWW
TSSOP–20
DT SUFFIX
CASE 948E
1
20
1
20
1
20
Device Package Shipping
ORDERING INFORMATION
MC74HC573AN PDIP–20 1440 / Box
MC74HC573ADW SOIC–WIDE
38 / Rail
MC74HC573ADWR2 SOIC–WIDE 1000 / Reel
MC74HC573ADT TSSOP–20 75 / Rail
MC74HC573ADTR2 TSSOP–20
2500 / Reel
HC
573A
ALYW
1
20
MC74HC573A
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2
LOGIC DIAGRAM
DATA
INPUTS
D0
D1
D2
D3
D4
D5
D6
D7
LATCH ENABLE
OUTPUT ENABLE
11
1
9
8
7
6
5
4
3
219
18
17
16
15
14
13
12
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
PIN 20 = V
CC
PIN 10 = GND
NONINVERTING
OUTPUTS
PIN ASSIGNMENT
D4
D2
D1
D0
OUTPUT
ENABLE
GND
D7
D6
D5
D3 5
4
3
2
1
10
9
8
7
6
14
15
16
17
18
19
20
11
12
13
Q3
Q2
Q1
Q0
V
CC
LATCH
ENABLE
Q7
Q6
Q5
Q4
FUNCTION TABLE
Inputs Output
Output Latch
Enable Enable D Q
LHHH
LHLL
L L X No Change
HXXZ
X = Don’t Care
Z = High Impedance
Internal Gate Propagation Delay
Internal Gate Power Dissipation
pJ
*Equivalent to a two–input NAND gate.
MC74HC573A
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3
DC Supply Voltage (Referenced to GND)
DC Input Voltage (Referenced to GND)
DC Output Voltage (Referenced to GND)
DC Input Current, per Pin
DC Output Current, per Pin
DC Supply Current, VCC and GND Pins
Power Dissipation in Still Air, Plastic DIP†
SOIC Package†
TSSOP Package†
Lead Temperature, 1 mm from Case for 10 Seconds
(Plastic DIP, TSSOP or SOIC Package)
_
C
*Maximum Ratings are those values beyond which damage to the device may occur.
Functional operation should be restricted to the Recommended Operating Conditions.
†Derating — Plastic DIP: –10 mW/_C from 65_ to 125_C
SOIC Package: –7 mW/_C from 65_ to 125_C
TSSOP Package: –6.1 mW/°C from 65_ to 125_C
For high frequency or heavy load considerations, see Chapter 2 of the ON Semiconductor High–Speed CMOS Data Book (DL129/D).
RECOMMENDED OPERATING CONDITIONS
DC Supply Voltage (Referenced to GND)
DC Input Voltage, Output Voltage (Referenced to GND)
Operating Temperature, All Package Types
Input Rise and Fall Time VCC = 2.0 V
(Figure 1) VCC = 4.5 V
VCC = 6.0 V
ns
DC ELECTRICAL CHARACTERISTICS (Voltages Referenced to GND)
Minimum High–Level Input
Voltage
V
out
= 0.1 V or VCC – 0.1 V
|I
out
| v 20 µA
Maximum Low–Level Input
Voltage
V
out
= 0.1 V or VCC – 0.1 V
|I
out
| v 20 µA
Minimum High–Level Output
Voltage
Vin = VIH or V
IL
|I
out
| v 20 µA
Vin = VIH or VIL|I
out
| ≤ 2.4mA
|I
out
| v 6.0 mA
|I
out
| v 7.8 mA
NOTE: Information on typical parametric values can be found in Chapter 2 of the ON Semiconductor High–Speed CMOS Data Book
(DL129/D).
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 circuit. For proper operation, Vin and
V
out
should be constrained to the
range GND v (Vin or V
out
) v VCC.
Unused inputs must always be
tied to an appropriate logic voltage
level (e.g., either GND or VCC).
Unused outputs must be left open.