74LVC573A
Octal D-type transparent latch with 5 V tolerant
inputs/outputs; 3-state
Rev. 5 — 19 February 2013
Product data sheet
1. General description
The 74LVC573A consists of eight D-type transparent latches, featuring separate D-type
inputs for each latch and 3-state true outputs for bus-oriented applications. A Latch
Enable (LE) input and an Output Enable (OE) input are common to all internal latches.
When LE is HIGH, data at the Dn inputs enters the latches. In this condition, the latches
are transparent, that is, a latch output changes each time its corresponding D-input
changes. When LE is LOW, the latches store the information that was present at the
D-inputs one set-up time preceding the HIGH-to-LOW transition of LE.
When OE is LOW, the contents of the eight latches are available at the outputs. When OE
is HIGH, the outputs go to the high impedance OFF-state. Operation of the OE input does
not affect the state of the latches.
Inputs can be driven from either 3.3 V or 5 V devices. When disabled, up to 5.5 V can be
applied to the outputs. These features allow the use of these devices as translators in
mixed 3.3 V or 5 V applications.
The 74LVC573A is functionally identical to the 74LVC373A, but has a different pin
arrangement.
2. Features and benefits
5 V tolerant inputs/outputs, for interfacing with 5 V logic
Supply voltage range from 1.2 V to 3.6 V
CMOS low power consumption
Direct interface with TTL levels
High-impedance when V
CC
= 0 V
Flow-through pinout architecture
Complies with JEDEC standard:
JESD8-7A (1.65 V to 1.95 V)
JESD8-5A (2.3 V to 2.7 V)
JESD8-C/JESD36 (2.7 V to 3.6 V)
ESD protection:
HBM JESD22-A114F exceeds 2000 V
MM JESD22-A115-B exceeds 200 V
CDM JESD22-C101E exceeds 1000 V
Specified from
40 C
to +85
C
and
40 C
to +125
C
NXP Semiconductors
74LVC573A
Octal D-type transparent latch with 5 V tolerant inputs/outputs; 3-state
3. Ordering information
Table 1.
Ordering information
Package
Temperature range
74LVC573AD
74LVC573ADB
40 C
to +125
C
40 C
to +125
C
Name
SO20
SSOP20
TSSOP20
Description
plastic small outline package; 20 leads;
body width 7.5 mm
plastic shrink small outline package; 20 leads;
body width 5.3 mm
plastic thin shrink small outline package; 20 leads;
body width 4.4 mm
Version
SOT163-1
SOT339-1
SOT360-1
SOT764-1
Type number
74LVC573APW
40 C
to +125
C
74LVC573ABQ
40 C
to +125
C
DHVQFN20 plastic dual in-line compatible thermal enhanced very
thin quad flat package; no leads; 20 terminals;
body 2.5
4.5
0.85 mm
DHXQFN20 plastic dual in-line compatible thermal enhanced
extremely thin quad flat package; no leads; 20
terminals; body 4.5
2.5
0.5 mm
74LVC573ABX
40 C
to +125
C
SOT1045-2
4. Functional diagram
11
1
1
2
3
4
5
6
7
8
9
OE
D0
D1
D2
D3
D4
D5
D6
D7
LE
11
mna807
C1
EN1
2
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
19
18
17
16
15
14
13
12
8
9
3
4
5
6
7
1D
19
18
17
16
15
14
13
12
mna808
Fig 1.
Logic symbol
Fig 2.
IEC logic symbol
74LVC573A
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 5 — 19 February 2013
2 of 20
NXP Semiconductors
74LVC573A
Octal D-type transparent latch with 5 V tolerant inputs/outputs; 3-state
2
3
4
5
6
7
8
9
D0
D1
D2
D3
D4
D5
D6
D7
LATCH
1 to 8
3-STATE
OUTPUTS
Q0 19
Q1 18
Q2 17
Q3 16
Q4 15
Q5 14
Q6 13
Q7 12
11 LE
1 OE
mna809
Fig 3.
Functional diagram
D0
D1
D2
D3
D4
D5
D6
D7
D
Q
D
Q
D
Q
D
Q
D
Q
D
Q
D
Q
D
Q
LATCH
1
LE LE
LATCH
2
LE LE
LATCH
3
LE LE
LATCH
4
LE LE
LATCH
5
LE LE
LATCH
6
LE LE
LATCH
7
LE LE
LATCH
8
LE LE
LE
OE
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
mna810
Fig 4.
Logic diagram
74LVC573A
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 5 — 19 February 2013
3 of 20
NXP Semiconductors
74LVC573A
Octal D-type transparent latch with 5 V tolerant inputs/outputs; 3-state
5. Pinning information
5.1 Pinning
terminal 1
index area
D0
D1
OE
D0
D1
D2
D3
D4
D5
D6
D7
1
2
3
4
5
6
7
8
9
20 V
CC
19 Q0
18 Q1
17 Q2
16 Q3
15 Q4
14 Q5
13 Q6
12 Q7
11 LE
001aad099
2
3
4
5
20 V
CC
19 Q0
18 Q1
17 Q2
16 Q3
15 Q4
14 Q5
13 Q6
12 Q7
LE 11
D2
D3
D4
D5
D6
D7
6
7
8
9
GND 10
GND
(1)
573
1
OE
573
GND 10
001aad100
Transparent top view
(1) This is not a supply pin. The substrate is attached to this
pad using conductive die attach material. There is no
electrical or mechanical requirement to solder this pad.
However, if it is soldered, the solder land should remain
floating or be connected to GND.
Fig 5.
Pin configuration for SO20 and (T)SSOP20
Fig 6.
Pin configuration for DHVQFN20 and
DHXQFN20
5.2 Pin description
Table 2.
Symbol
OE
LE
D[0:7]
Q[0:7]
GND
V
CC
Pin description
Pin
1
11
2, 3, 4, 5, 6, 7, 8, 9
19, 18, 17, 16, 15, 14, 13, 12
10
20
Description
output enable input (active LOW)
latch enable input (active HIGH)
data input
data output
ground (0 V)
supply voltage
74LVC573A
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 5 — 19 February 2013
4 of 20
NXP Semiconductors
74LVC573A
Octal D-type transparent latch with 5 V tolerant inputs/outputs; 3-state
6. Functional description
Table 3.
Functional table
[1]
Input
OE
Enable and read register
(transparent mode)
Latch and read register
Latch register and disable outputs
L
L
L
L
H
H
[1]
H = HIGH voltage level
h = HIGH voltage level one set-up time prior to the HIGH-to-LOW LE transition
L = LOW voltage level
l = LOW voltage level one set-up time prior to the HIGH-to-LOW LE transition
Z = high-impedance OFF-state
Operating modes
Internal latch Output
LE
H
H
L
L
L
L
Dn
L
H
l
h
l
h
L
H
L
H
L
H
Qn
L
H
L
H
Z
Z
7. Limiting values
Table 4.
Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V).
Symbol
V
CC
I
IK
V
I
I
OK
V
O
I
O
I
CC
I
GND
T
stg
P
tot
[1]
[2]
[3]
Parameter
supply voltage
input clamping current
input voltage
output clamping current
output voltage
output current
supply current
ground current
storage temperature
total power dissipation
Conditions
V
I
< 0
[1]
Min
0.5
50
0.5
-
[2]
Max
+6.5
-
+6.5
50
V
CC
+ 0.5
50
100
-
+150
500
Unit
V
mA
V
mA
V
mA
mA
mA
C
mW
V
O
> V
CC
or V
O
< 0
V
O
= 0 V to V
CC
0.5
-
-
100
65
T
amb
=
40 C
to +125
C
[3]
-
The minimum input voltage ratings may be exceeded if the input current ratings are observed.
The output voltage ratings may be exceeded if the output current ratings are observed.
For SO20 packages: above 70
C
the value of P
tot
derates linearly with 8 mW/K.
For (T)SSOP20 packages: above 60
C
the value of P
tot
derates linearly with 5.5 mW/K.
For DHVQFN20 and DHXQFN20 packages: above 60
C
the value of P
tot
derates linearly with 4.5 mW/K.
74LVC573A
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 5 — 19 February 2013
5 of 20
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