74HC574; 74HCT574
Octal D-type flip-flop; positive edge-trigger; 3-state
Rev. 7 — 4 March 2016
Product data sheet
1. General description
The 74HC574; 74HCT574 is an 8-bit positive-edge triggered D-type flip-flop with 3-state
outputs. The device features a clock (CP) and output enable (OE) inputs. The flip-flops will
store the state of their individual D-inputs that meet the set-up and hold time requirements
on the LOW-to-HIGH clock (CP) transition. A HIGH on OE causes the outputs to assume
a high-impedance OFF-state. Operation of the OE input does not affect the state of the
flip-flops. Inputs include clamp diodes. This enables the use of current limiting resistors to
interface inputs to voltages in excess of V
CC
.
2. Features and benefits
Input levels:
For 74HC574: CMOS level
For 74HCT574: TTL level
3-state non-inverting outputs for bus oriented applications
8-bit positive, edge-triggered register
Common 3-state output enable input
Complies with JEDEC standard no. 7 A
Multiple package options
ESD protection:
HBM JESD22-A114F exceeds 2 000 V
MM JESD22-A115-A exceeds 200 V
Specified from
40 C
to +85
C
and from
40 C
to +125
C
3. Ordering information
Table 1.
Ordering information
Temperature range
74HC574D
74HCT574D
74HC574DB
74HCT574DB
74HC574PW
74HCT574PW
40 C
to +125
C
TSSOP20
40 C
to +125
C
SSOP20
40 C
to +125
C
Name
SO20
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
Type number Package
Nexperia
74HC574; 74HCT574
Octal D-type flip-flop; positive edge-trigger; 3-state
4. Functional diagram
Fig 1.
Functional diagram
Fig 2.
Logic diagram
74HC_HCT574
All information provided in this document is subject to legal disclaimers.
©
Nexperia B.V. 2017. All rights reserved
Product data sheet
Rev. 7 — 4 March 2016
2 of 18
Nexperia
74HC574; 74HCT574
Octal D-type flip-flop; positive edge-trigger; 3-state
Fig 3.
Logic symbol
Fig 4.
IEC logic symbol
5. Pinning information
5.1 Pinning
Fig 5.
Pin configuration SO20, SSOP20 and TSSOP20
5.2 Pin description
Table 2.
Symbol
OE
D[0:7]
GND
CP
Q[0:7]
V
CC
74HC_HCT574
Pin description
Pin
1
2, 3, 4, 5, 6, 7, 8, 9
10
11
19, 18, 17, 16, 15, 14, 13, 12
20
Description
3-state output enable input (active LOW)
data input
ground (0 V)
clock input (LOW-to-HIGH, edge triggered)
3-state flip-flop output
supply voltage
All information provided in this document is subject to legal disclaimers.
©
Nexperia B.V. 2017. All rights reserved
Product data sheet
Rev. 7 — 4 March 2016
3 of 18
Nexperia
74HC574; 74HCT574
Octal D-type flip-flop; positive edge-trigger; 3-state
6. Functional description
Table 3.
Function table
[1]
Input
OE
Load and read register
Load register and disable output
L
L
H
H
[1]
H = HIGH voltage level;
h = HIGH voltage level one setup time prior to the HIGH-to-LOW CP transition;
L = LOW voltage level;
l = LOW voltage level one setup time prior to the HIGH-to-LOW CP transition;
Z = high-impedance OFF-state;
= LOW-to-HIGH clock transition.
Operating mode
CP
Dn
l
h
l
h
Internal
flip-flop
L
H
L
H
Output
Qn
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
I
OK
I
O
I
CC
I
GND
T
stg
P
tot
[1]
Parameter
supply voltage
input clamping current
output clamping current
output current
supply current
ground current
storage temperature
total power dissipation
Conditions
V
I
<
0.5
V or V
I
> V
CC
+ 0.5 V
V
O
<
0.5
V or V
O
> V
CC
+ 0.5 V
V
O
=
0.5
V to (V
CC
+ 0.5 V)
Min
0.5
-
-
-
-
-
65
Max
+7
20
20
35
+70
70
+150
500
Unit
V
mA
mA
mA
mA
mA
C
mW
SO20, SSOP20 and TSSOP20 packages
[1]
-
For SO20: P
tot
derates linearly with 8 mW/K above 70
C.
For SSOP20 and TSSOP20 packages: P
tot
derates linearly with 5.5 mW/K above 60
C.
8. Recommended operating conditions
Table 5.
Recommended operating conditions
Voltages are referenced to GND (ground = 0 V)
Symbol Parameter
V
CC
V
I
V
O
T
amb
supply voltage
input voltage
output voltage
ambient temperature
Conditions
Min
2.0
0
0
40
74HC574
Typ
5.0
-
-
+25
Max
6.0
V
CC
V
CC
+125
Min
4.5
0
0
40
74HCT574
Typ
5.0
-
-
+25
Max
5.5
V
CC
V
CC
+125
V
V
V
C
Unit
74HC_HCT574
All information provided in this document is subject to legal disclaimers.
©
Nexperia B.V. 2017. All rights reserved
Product data sheet
Rev. 7 — 4 March 2016
4 of 18
Nexperia
74HC574; 74HCT574
Octal D-type flip-flop; positive edge-trigger; 3-state
Table 5.
Recommended operating conditions
…continued
Voltages are referenced to GND (ground = 0 V)
…continued
Symbol Parameter
t/V
input transition rise and fall rate
Conditions
Min
V
CC
= 2.0 V
V
CC
= 4.5 V
V
CC
= 6.0 V
-
-
-
74HC574
Typ
-
1.67
-
Max
625
139
83
Min
-
-
-
74HCT574
Typ
-
1.67
-
Max
-
139
-
ns/V
ns/V
ns/V
Unit
9. Static characteristics
Table 6.
Static characteristics
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Parameter
74HC574
V
IH
HIGH-level
input voltage
V
CC
= 2.0 V
V
CC
= 4.5 V
V
CC
= 6.0 V
V
IL
LOW-level
input voltage
V
CC
= 2.0 V
V
CC
= 4.5 V
V
CC
= 6.0 V
V
OH
HIGH-level
output voltage
V
I
= V
IH
or V
IL
I
O
=
20 A;
V
CC
= 2.0 V
I
O
=
20 A;
V
CC
= 4.5 V
I
O
=
20 A;
V
CC
= 6.0 V
I
O
=
6.0
mA; V
CC
= 4.5 V
I
O
=
7.8
mA; V
CC
= 6.0 V
V
OL
LOW-level
output voltage
V
I
= V
IH
or V
IL
I
O
= 20
A;
V
CC
= 2.0 V
I
O
= 20
A;
V
CC
= 4.5 V
I
O
= 20
A;
V
CC
= 6.0 V
I
O
= 6.0 mA; V
CC
= 4.5 V
I
O
= 7.8 mA; V
CC
= 6.0 V
I
I
I
OZ
I
CC
C
I
input leakage
current
OFF-state
output current
supply current
input
capacitance
V
I
= V
CC
or GND;
V
CC
= 6.0 V
V
I
= V
IH
or V
IL
; V
CC
= 6.0 V;
V
O
= V
CC
or GND
V
I
= V
CC
or GND; I
O
= 0 A;
V
CC
= 6.0 V
-
-
-
-
-
-
-
-
-
0
0
0
0.15
0.16
-
-
-
3.5
0.1
0.1
0.1
0.26
0.26
0.1
0.5
8.0
-
-
-
-
-
-
-
-
-
-
0.1
0.1
0.1
0.33
0.33
1.0
5.0
80
-
-
-
-
-
-
-
-
-
-
0.1
0.1
0.1
0.4
0.4
1.0
10.0
160
-
V
V
V
V
V
A
A
A
pF
1.9
4.4
5.9
3.98
5.48
2.0
4.5
6.0
4.32
5.81
-
-
-
-
-
1.9
4.4
5.9
3.84
5.34
-
-
-
-
-
1.9
4.4
5.9
3.7
5.2
-
-
-
-
-
V
V
V
V
V
1.5
3.15
4.2
-
-
-
1.2
2.4
3.2
0.8
2.1
2.8
-
-
-
0.5
1.35
1.8
1.5
3.15
4.2
-
-
-
-
-
-
0.5
1.35
1.8
1.5
3.15
4.2
-
-
-
-
-
-
0.5
1.35
1.8
V
V
V
V
V
V
Conditions
Min
25
C
Typ
Max
40 C
to +85
C 40 C
to +125
C
Unit
Min
Max
Min
Max
74HC_HCT574
All information provided in this document is subject to legal disclaimers.
©
Nexperia B.V. 2017. All rights reserved
Product data sheet
Rev. 7 — 4 March 2016
5 of 18
嵌入式系统
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