74LVT374, 74LVTH374 — Low Voltage Octal D-Type Flip-Flop with 3-STATE Outputs
January 2008
74LVT374, 74LVTH374
Low Voltage Octal D-Type Flip-Flop with 3-STATE Outputs
Features
■
Input and output interface capability to systems at
■
General Description
The LVT374 and LVTH374 are high-speed, low-power
octal D-type flip-flops featuring separate D-type inputs
for each flip-flop and 3-STATE outputs for bus-oriented
applications. A buffered Clock (CP) and Output Enable
(OE) are common to all flip-flops.
The LVTH374 data inputs include bushold, eliminating
the need for external pull-up resistors to hold unused
inputs.
These octal flip-flops are designed for low-voltage (3.3V)
V
CC
applications, but with the capability to provide a TTL
interface to a 5V environment. The LVT374 and
LVTH374 are fabricated with an advanced BiCMOS
technology to achieve high speed operation similar to 5V
ABT while maintaining low power dissipation.
■
■
■
■
■
■
5V V
CC
Bus-Hold data inputs eliminate the need for external
pull-up resistors to hold unused inputs (74LVTH374),
also available without bushold feature (74LVT374)
Live insertion/extraction permitted
Power Up/Down high impedance provides glitch-free
bus loading
Outputs source/sink –32mA/+64mA
Functionally compatible with the 74 series 374
Latch-up performance exceeds 500mA
ESD performance:
– Human-body model
>
2000V
– Machine model
>
200V
– Charged-device model
>
1000V
Ordering Information
Order Number
74LVT374WM
74LVT374SJ
74LVT374MTC
74LVTH374WM
74LVTH374SJ
74LVTH374MTC
Package
Number
M20B
M20D
MTC20
M20B
M20D
MTC20
Package Description
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm
Wide
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm
Wide
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering number.
All packages are lead free per JEDEC: J-STD-020B standard.
©1999 Fairchild Semiconductor Corporation
74LVT374, 74LVTH374 Rev. 1.5.0
www.fairchildsemi.com
74LVT374, 74LVTH374 — Low Voltage Octal D-Type Flip-Flop with 3-STATE Outputs
Connection Diagram
Logic Symbols
IEEE/IEC
Pin Description
Pin Names
D
0
–D
7
CP
OE
O
0
–O
7
Description
Data Inputs
Clock Pulse Input
3-STATE Output Enable Input
3-STATE Outputs
Functional Description
The LVT374 and LVTH374 consist of eight edge-
triggered flip-flops with individual D-type inputs and
3-STATE true outputs. The buffered clock and buffered
Output Enable are common to all flip-flops. The eight flip-
flops will store the state of their individual D inputs that
meet the setup and hold time requirements on the LOW-
to-HIGH Clock (CP) transition. With the Output Enable
(OE) LOW, the contents of the eight flip-flops are avail-
able at the outputs. When the OE is HIGH, the outputs
go to the high impedance state. Operation of the OE
input does not affect the state of the flip-flops.
Truth Table
Inputs
D
n
H
L
X
X
L
X
Outputs
OE
L
L
L
H
CP
O
n
H
L
O
o
Z
H
=
HIGH Voltage Level
L
=
LOW Voltage Level
X
=
Immaterial
Z
=
High Impedance
=
LOW-to-HIGH Transition
O
o
=
Previous O
o
before HIGH-to-LOW of CP
©1999 Fairchild Semiconductor Corporation
74LVT374, 74LVTH374 Rev. 1.5.0
www.fairchildsemi.com
2
74LVT374, 74LVTH374 — Low Voltage Octal D-Type Flip-Flop with 3-STATE Outputs
Logic Diagram
Please note that this diagram is provided only for the understanding of logic operations and should not be used to
estimate propagation delays.
©1999 Fairchild Semiconductor Corporation
74LVT374, 74LVTH374 Rev. 1.5.0
www.fairchildsemi.com
3
74LVT374, 74LVTH374 — Low Voltage Octal D-Type Flip-Flop with 3-STATE Outputs
Absolute Maximum Ratings
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be
operable above the recommended operating conditions and stressing the parts to these levels is not recommended.
In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability.
The absolute maximum ratings are stress ratings only.
Symbol
V
CC
V
I
V
O
Supply Voltage
DC Input Voltage
DC Output Voltage
Output in 3-STATE
Parameter
Rating
–0.5V to +4.6V
–0.5V to +7.0V
–0.5V to +7.0V
–0.5V to +7.0V
–50mA
–50mA
64mA
128mA
±64mA
±128mA
–65°C to +150°C
Output in HIGH or LOW State
(1)
I
IK
I
OK
I
O
DC Input Diode Current, V
I
<
GND
DC Output Diode Current, V
O
<
GND
DC Output Current, V
O
>
V
CC
Output at HIGH State
Output at LOW State
I
CC
I
GND
T
STG
DC Supply Current per Supply Pin
DC Ground Current per Ground Pin
Storage Temperature
Note:
1. I
O
Absolute Maximum Rating must be observed.
Recommended Operating Conditions
The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended
operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not
recommend exceeding them or designing to absolute maximum ratings.
Symbol
V
CC
V
I
I
OH
I
OL
T
A
∆
t /
∆
V
Supply Voltage
Input Voltage
Parameter
Min
2.7
0
Max
3.6
5.5
–32
64
Units
V
V
mA
mA
°C
ns/V
HIGH-Level Output Current
LOW-Level Output Current
Free-Air Operating Temperature
Input Edge Rate, V
IN
=
0.8V–2.0V, V
CC
=
3.0V
–40
0
85
10
©1999 Fairchild Semiconductor Corporation
74LVT374, 74LVTH374 Rev. 1.5.0
www.fairchildsemi.com
4
74LVT374, 74LVTH374 — Low Voltage Octal D-Type Flip-Flop with 3-STATE Outputs
DC Electrical Characteristics
T
A
=
–40°C to +85°C
Symbol
V
IK
V
IH
V
IL
V
OH
Parameter
Input Clamp Diode Voltage
Input HIGH Voltage
Input LOW Voltage
Output HIGH Voltage
V
CC
(V)
2.7
2.7–3.6
2.7–3.6
2.7–3.6
2.7
3.0
Conditions
I
I
=
–18mA
V
O
≤
0.1V or
V
O
≥
V
CC
– 0.1V
I
OH
=
–100µA
I
OH
=
–8mA
I
OH
=
–32mA
I
OL
=
100µA
I
OL
=
24mA
I
OL
=
16mA
I
OL
=
32mA
I
OL
=
64mA
Min.
2.0
Typ.
(2)
Max. Units
–1.2
0.8
V
V
V
V
V
CC
–0.2
2.4
2.0
0.2
0.5
0.4
0.5
0.55
75
–75
500
–500
10
±1
–5
1
±100
±100
–5
5
10
0.19
5
0.19
0.19
0.2
V
OL
Output LOW Voltage
2.7
3.0
V
I
I(HOLD)
I
I(OD)
I
I
(3)
Bushold Input Minimum
Drive
Bushold Input Over-Drive
Current to Change State
Input Current
Control Pins
Data Pins
3.0
3.0
3.6
3.6
3.6
0
0–1.5V
3.6
3.6
3.6
3.6
3.6
3.6
3.6
3.6
V
I
=
0.8V
V
I
=
(4)
(5)
µA
µA
µA
2.0V
(3)
V
I
=
5.5V
V
I
=
0V or V
CC
V
I
=
0V
V
I
=
V
CC
0V
≤
V
I
or V
O
≤
5.5V
V
O
=
0.5V to 3.0V,
V
I
=
GND or V
CC
V
O
=
0.5V
V
O
=
3.0V
V
CC
<
V
O
≤
5.5V
Outputs HIGH
Outputs LOW
Outputs Disabled
V
CC
≤
V
O
≤
5.5V,
Outputs Disabled
One Input at V
CC
– 0.6V,
Other Inputs at V
CC
or
GND
I
OFF
I
PU/PD
I
OZL
I
OZH
I
OZH
+
I
CCH
I
CCL
I
CCZ
I
CCZ
+
∆I
CC
Power Off Leakage Current
Power up/down 3-STATE
Output Current
3-STATE Output Leakage
Current
3-STATE Output Leakage
Current
3-STATE Output Leakage
Current
Power Supply Current
Power Supply Current
Power Supply Current
Power Supply Current
Increase in Power Supply
Current
(6)
µA
µA
µA
µA
µA
mA
mA
mA
mA
mA
Notes:
2. All typical values are at V
CC
=
3.3V, T
A
=
25°C.
3. Applies to bushold versions only (74LVTH374).
4. An external driver must source at least the specified current to switch from LOW-to-HIGH.
5. An external driver must sink at least the specified current to switch from HIGH-to-LOW.
6. This is the increase in supply current for each input that is at the specified voltage level rather than V
CC
or GND.
©1999 Fairchild Semiconductor Corporation
74LVT374, 74LVTH374 Rev. 1.5.0
www.fairchildsemi.com
5
工业自动化与控制
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
