74LVT374
3.3 V octal D-type flip-flop; 3-state
Rev. 4 — 22 November 2011
Product data sheet
1. General description
The 74LVT374 is a high-performance product designed for V
CC
operation at 3.3 V.
This device is an 8-bit, edge triggered register coupled to eight 3-state output buffers. The
two sections of the device are controlled independently by the clock (pin CP) and output
enable (pin OE) control gates. The state of each Dn input (one setup time before the
LOW-to-HIGH clock transition) is transferred to the corresponding flip-flops Qn output.
The 3-state output buffers are designed to drive heavily loaded 3-state buses, MOS
memories, or MOS microprocessors.
The active LOW output enable (pin OE) controls all eight 3-state buffers independent of
the clock operation.
When pin OE is LOW, the stored data appears at the outputs. When pin OE is HIGH, the
outputs are in the high-impedance OFF-state, which means they will neither drive nor load
the bus.
2. Features and benefits
Inputs and outputs arranged for easy interfacing to microprocessors
3-state outputs for bus interfacing
Common output enable control
TTL input and output switching levels
Input and output interface capability to systems at 5 V supply
Bus hold data inputs eliminate need for external pull-up resistors to hold unused inputs
Live insertion and extraction permitted
No bus current loading when output is tied to 5 V bus
Power-up reset
Power-up 3-state
Latch-up protection
JESD78 class II exceeds 500 mA
ESD protection:
HBM JESD22-A114E exceeds 2000 V
MM JESD22-A115-A exceeds 200 V
Specified from
40 C
to +85
C
NXP Semiconductors
74LVT374
3.3 V octal D-type flip-flop; 3-state
3. Ordering information
Table 1.
Ordering information
Package
Temperature range
74LVT374D
74LVT374DB
74LVT374PW
40 C
to +85
C
40 C
to +85
C
40 C
to +85
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
Type number
4. Functional diagram
1
11
EN
C1
2
5
6
9
12
15
16
19
mna196
11
3
4
7
8
13
14
17
18
CP
D0
D1
D2
D3
D4
D5
D6
D7
OE
1
mna891
3
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
2
5
6
9
12
15
16
19
17
18
4
7
8
13
14
1D
Fig 1.
Logic symbol
D0
D1
D2
D3
Fig 2.
D4
IEC logic symbol
D5
D6
D7
D
D
D
D
D
D
D
D
CP
CP
Q
CP
Q
CP
Q
CP
Q
CP
Q
CP
Q
CP
Q
CP
Q
OE
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
001aae467
Fig 3.
Logic diagram
74LVT374
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 4 — 22 November 2011
2 of 16
NXP Semiconductors
74LVT374
3.3 V octal D-type flip-flop; 3-state
5. Pinning information
5.1 Pinning
74LVT374
OE
Q0
D0
D1
Q1
Q2
D2
D3
Q3
1
2
3
4
5
6
7
8
9
20 V
CC
19 Q7
18 D7
17 D6
16 Q6
15 Q5
14 D5
13 D4
12 Q4
11 CP
aaa-000304
GND 10
Fig 4.
Pin configuration for SO20, and (T)SSOP20)
5.2 Pin description
Table 2.
Symbol
OE
D0 to D7
GND
CP
Q0 to Q7
V
CC
Pin description
Pin
1
3, 4, 7, 8, 13, 14, 17, 18
10
11
2, 5, 6, 9, 12, 15, 16, 19
20
Description
output enable input (active LOW)
data input
ground (0 V)
clock pulse input (active rising edge)
data output
supply voltage
74LVT374
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 4 — 22 November 2011
3 of 16
NXP Semiconductors
74LVT374
3.3 V octal D-type flip-flop; 3-state
6. Functional description
6.1 Function table
Table 3.
Function table
[1]
Control
OE
Load and read register
Hold
Disable outputs
L
L
H
CP
NC
L or H
[1]
H = HIGH voltage level;
L = LOW voltage level;
= LOW-to-HIGH clock transition;
h = HIGH voltage level one setup time prior to the LOW-to-HIGH clock transition;
l = LOW voltage level one setup time prior to the LOW-to-HIGH clock transition;
Z = high-impedance OFF-state;
NC = no change;
X = don’t care.
Operating mode
Input
Dn
l
h
X
X
Dn
Internal register Output
Qn
L
H
NC
NC
Dn
L
H
NC
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
V
I
V
O
I
IK
I
OK
I
O
T
stg
T
j
P
tot
[1]
[2]
[3]
Parameter
supply voltage
input voltage
output voltage
input clamping current
output clamping current
output current
storage temperature
junction temperature
total power dissipation
Conditions
[1]
Min
0.5
0.5
0.5
-
-
-
-
65
[2]
Max
+4.6
+7.0
+7.0
50
50
128
64
+150
150
500
Unit
V
V
V
mA
mA
mA
mA
C
C
mW
output in OFF-state or HIGH-state
V
I
< 0 V
V
O
< 0 V
output in LOW-state
output in HIGH-state
[1]
-
-
T
amb
=
40 C
to +85
C
[3]
The input and output negative voltage ratings may be exceeded if the input and output clamp current ratings are observed.
The performance capability of a high-performance integrated circuit in conjunction with its thermal environment can create junction
temperatures which are detrimental to reliability.
For SO20 packages: above 70
C
derate linearly with 8 mW/K.
For SSOP20 and TSSOP20 packages: above 60
C
derate linearly with 5.5 mW/K.
For DHVQFN20 packages: above 60
C
derate linearly with 4.5 mW/K.
74LVT374
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 4 — 22 November 2011
4 of 16
NXP Semiconductors
74LVT374
3.3 V octal D-type flip-flop; 3-state
8. Recommended operating conditions
Table 5.
Symbol
V
CC
V
I
V
IH
V
IL
I
OH
I
OL
T
amb
t/V
Recommended operating conditions
Parameter
supply voltage
input voltage
HIGH-level input voltage
LOW-level input voltage
HIGH-level output current
LOW-level output current
current duty cycle
50 %; f
i
1 kHz
ambient temperature
input transition rise and fall rate
in free air
outputs enabled
Conditions
Min
2.7
0
2.0
-
-
-
-
40
-
Max
3.6
5.5
-
0.8
32
32
64
+85
10
Unit
V
V
V
V
mA
mA
mA
C
ns/V
9. Static characteristics
Table 6.
Static characteristics
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Parameter
V
IK
V
OH
input clamping voltage
Conditions
V
CC
= 2.7 V; I
IK
=
18
mA
V
CC
= 2.7 V; I
OH
=
8
mA
V
CC
= 3.0 V; I
OH
=
32
mA
V
OL
LOW-level output voltage
V
CC
= 2.7 V
I
OL
= 100
A
I
OL
= 24 mA
V
CC
= 3.0 V
I
OL
= 16 mA
I
OL
= 32 mA
I
OL
= 64 mA
V
OL(pu)
I
I
power-up LOW-level
output voltage
input leakage current
V
CC
= 3.6 V; I
O
= 1 mA; V
I
= GND or V
CC
all input pins; V
CC
= 0 V or 3.6 V; V
I
= 5.5 V
control pins; V
CC
= 3.6 V; V
I
= V
CC
or GND
data pins; V
CC
= 3.6 V
V
I
= V
CC
V
I
= 0 V
I
OFF
I
LO
I
BHL
I
BHH
I
BHHO
power-off leakage current V
CC
= 0 V; V
I
or V
O
= 0 V to 4.5 V
output leakage current
bus hold LOW current
bus hold HIGH current
bus hold HIGH
overdrive current
V
O
= 5.5 V and V
CC
= 3.0 V; output HIGH
V
CC
= 3.0 V; V
I
= 0.8 V
V
CC
= 3.0 V; V
I
= 2.0 V
V
CC
= 3.6; V
I
= 0 V to 3.6 V
[4]
[4]
[4]
[3]
[2]
T
amb
=
40 C
to +85
C
Min
1.2
2.4
2.0
-
-
-
-
-
-
-
-
-
5
-
-
75
-
-
Typ
[1]
0.9
2.5
2.2
0.1
0.3
0.25
0.3
0.4
0.13
1
0.1
0.1
1
1
60
150
150
-
Max
-
-
-
-
0.2
0.5
0.4
0.5
0.55
0.55
10
1
1
-
100
125
-
75
500
Unit
V
V
V
V
V
V
V
V
V
V
A
A
A
A
A
A
A
A
A
HIGH-level output voltage V
CC
= 2.7 V to 3.6 V; I
OH
=
100 A
V
CC
0.2 V
CC
0.1
74LVT374
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 4 — 22 November 2011
5 of 16
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