74VHCT244AMTCX [FAIRCHILD]
Octal Buffer/Line Driver with 3-STATE Outputs; 八路缓冲器/ 3态输出线路驱动器
| 型号： | 74VHCT244AMTCX |
| 厂家： | 
FAIRCHILD SEMICONDUCTOR |
| 描述： | Octal Buffer/Line Driver with 3-STATE Outputs |
| 文件： | 总9页 (文件大小：232K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
May 2007
74VHCT244A
tm
Octal Buffer/Line Driver with 3-STATE Outputs
Features
General Description
■ High Speed: t = 5.9ns (Typ.) at V = 5V
The VHCT244A is an advanced high speed CMOS octal
bus transceiver fabricated with silicon gate CMOS tech-
nology. It achieves high speed operation similar to equiv-
alent Bipolar Schottky TTL while maintaining the CMOS
low power dissipation. The VHCT244A is a non-
inverting 3-STATE buffer having two active-LOW output
enables. This device is designed to be used as 3-STATE
memory address drivers, clock drivers, and bus oriented
transmitter/receivers.
PD
CC
■ Power down protection is provided on inputs and
outputs
■ Low power dissipation: I = 4µA (Max.) @ T = 25°C
CC
A
■ Pin and function compatible with 74HCT244
Protection circuits ensure that 0V to 7V can be applied to
(1)
the input and output pins without regard to the supply
voltage. These circuits prevent device destruction due to
mismatched supply and input/output voltages. This
device can be used to interface 5V to 3V systems and
two supply systems such as battery back up.
Note:
1. Outputs in OFF-State
Ordering Information
Order Number
Package
Number
Package Description
74VHCT244AM
74VHCT244ASJ
74VHCT244AMTC
M20B
M20D
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
MTC20
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm
Wide
Surface mount packages are also available on Tape and Reel. Specify by appending the suffix letter “X” to the
ordering number. Pb-Free package per JEDEC J-STD-020B.
©1997 Fairchild Semiconductor Corporation
74VHCT244A Rev. 1.3
www.fairchildsemi.com
Connection Diagram
Logic Symbol
Pin Description
Pin Names
Description
OE , OE
3-STATE Output Enable Inputs
Inputs
1
2
Truth Tables
I –I
0
7
Inputs
Outputs
O –O
3-STATE Outputs
0
7
OE
L
I
(Pins 12, 14, 16, 18)
1
n
L
L
H
Z
L
H
X
H
Inputs
Outputs
OE
L
I
(Pins 3, 5, 7, 9)
2
n
L
L
H
Z
L
H
X
H
H = HIGH Voltage Level
L = LOW Voltage Level
Z = High Impedance
©1997 Fairchild Semiconductor Corporation
74VHCT244A Rev. 1.3
www.fairchildsemi.com
2
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
Parameter
Rating
V
Supply Voltage
DC Input Voltage
DC Output Voltage
Note 2
–0.5V to +7.0V
–0.5V to +7.0V
CC
V
IN
V
OUT
–0.5V to V + 0.5V
CC
Note 3
–0.5V to +7.0V
–20mA
I
Input Diode Current
Output Diode Current
DC Output Current
IK
(4)
I
20mA
OK
I
25mA
OUT
I
DC V / GND Current
75mA
CC
CC
T
Storage Temperature
–65°C to +150°C
260°C
STG
T
Lead Temperature (Soldering, 10 seconds)
L
(5)
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
Parameter
Rating
V
Supply Voltage
Input Voltage
Output Voltage
Note 2
4.5V to +5.5V
0V to +5.5V
CC
V
IN
V
OUT
0V to V
CC
Note 3
0V to +5.5V
–40°C to +85°C
0ns/V ~ 20ns/V
T
Operating Temperature
OPR
t , t
Input Rise and Fall Time, V = 5.0V 0.5V
CC
r
f
Notes:
2. HIGH or LOW state. I
absolute maximum rating must be observed.
OUT
3. When outputs are in OFF-STATE or when V = 0V.
CC
4. V
< GND, V
> V (Outputs Active).
OUT
OUT CC
5. Unused inputs must be held HIGH or LOW. They may not float.
©1997 Fairchild Semiconductor Corporation
74VHCT244A Rev. 1.3
www.fairchildsemi.com
3
DC Electrical Characteristics
T = –40°C
A
T = 25°C
to +85°C
A
Symbol
Parameter
V
(V)
Conditions
Min. Typ. Max. Min. Max. Units
CC
V
HIGH Level Input
Voltage
4.5
2.0
2.0
2.0
2.0
V
V
V
V
IH
5.5
4.5
5.5
4.5
V
LOW Level Input
Voltage
0.8
0.8
0.8
0.8
IL
V
HIGH Level Output
Voltage
V
or V
=V I = –50µA 4.40
IH OH
4.50
0.0
4.40
3.80
OH
IN
IL
I
= –8mA
= 50µA
= 8mA
3.94
OH
V
LOW Level Output
Voltage
4.5
5.5
V
=V I
IH OL
0.1
0.1
0.44
2.5
OL
IN
or V
IL
I
0.36
0.25
OL
I
3-STATE Output
OFF-STATE Current
V
V
= V or V ,
µA
µA
µA
mA
µA
OZ
IN
IH
IL
= V or GND
OUT
CC
I
Input Leakage
Current
0–5.5
5.5
V
V
V
= 5.5V or GND
0.1
4.0
1.0
40.0
1.50
5.0
IN
IN
IN
IN
I
Quiescent Supply
Current
= V or GND
CC
CC
I
Maximum I /Input
5.5
= 3.4V, Other
1.35
0.5
CCT
CC
Input = V or GND
CC
I
Output Leakage
Current (Power
Down State)
0.0
V
= 5.5V
OFF
OUT
Noise Characteristics
T = 25°C
A
Symbol
Parameter
V
(V)
Conditions
Typ.
Limits
Units
CC
(6)
V
Quiet Output Maximum Dynamic
5.0
C = 50pF
0.9
1.1
V
OLP
L
V
OL
(6)
(6)
V
Quiet Output Minimum
Dynamic V
5.0
5.0
5.0
C = 50pF
–0.9
–1.1
2.0
V
V
V
OLV
L
OL
V
V
Minimum HIGH Level Dynamic
Input Voltage
C = 50pF
L
IHD
(6)
Maximum HIGH Level Dynamic
Input Voltage
C = 50pF
0.8
ILD
L
Note:
6. Parameter guaranteed by design.
©1997 Fairchild Semiconductor Corporation
74VHCT244A Rev. 1.3
www.fairchildsemi.com
4
AC Electrical Characteristics
T = –40°C
A
T = 25°C
to +85°C
A
Symbol
Parameter
V
(V)
Conditions
Min. Typ. Max. Min. Max. Units
CC
t
, t
Propagation Delay
Time
5.0 0.5
C = 15pF
5.4
5.9
7.7
8.2
8.8
7.4
8.4
1.0
1.0
1.0
1.0
1.0
8.5
9.5
ns
PLH PHL
L
C = 50pF
L
t
t
, t
3-STATE Output
Enable Time
5.0 0.5 R = 1kΩ C = 15pF
10.4
11.4
11.4
12.5
13.5
13.0
ns
PZL PZH
L
L
C = 50pF
L
, t
3-STATE Output
Disable Time
5.0 0.5 R = 1kΩ C = 50pF
ns
ns
PLZ PHZ
L
L
(7)
t
, t
Output to Output
Skew
5.0 0.5
1.0
10
1.0
10
OSLH OSHL
C
Input Capacitance
Output Capacitance
V
V
= Open
= 5.0V
4
9
pF
pF
pF
IN
CC
C
OUT
CC
(8)
C
Power Dissipation
Capacitance
18
PD
Notes:
7. Parameter guaranteed by design. t
= |t
– t
|; t
= |t
– t
|
OSLH
PLH max
PLH min OSHL
PHL max
PHL min
8. C is defined as the value of the internal equivalent capacitance which is calculated from the operating
PD
current consumption without load. Average operating current can be obtained by the equation:
I
(Opr.) = C • V • f + I / 8 (per F/F). The total C when n pcs. of the Octal D Flip-Flop operates
CC
PD CC IN CC PD
can be calculated by the equation: C (total) = 20 + 12n
PD
©1997 Fairchild Semiconductor Corporation
74VHCT244A Rev. 1.3
www.fairchildsemi.com
5
Physical Dimensions
Dimensions are in millimeters unless otherwise noted.
Figure 1. 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
Package Number M20B
©1997 Fairchild Semiconductor Corporation
74VHCT244A Rev. 1.3
www.fairchildsemi.com
6
Physical Dimensions (Continued)
Dimensions are in millimeters unless otherwise noted.
Figure 2. 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
Package Number M20D
©1997 Fairchild Semiconductor Corporation
74VHCT244A Rev. 1.3
www.fairchildsemi.com
7
Physical Dimensions (Continued)
Dimensions are in millimeters unless otherwise noted.
Figure 3. 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Package Number MTC20
©1997 Fairchild Semiconductor Corporation
74VHCT244A Rev. 1.3
www.fairchildsemi.com
8
TRADEMARKS
The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is not intended to be an
exhaustive list of all such trademarks.
ACEx®
HiSeC™
i-Lo™
Power-SPM™
PowerTrench®
Programmable Active Droop™
QFET®
TinyBuck™
TinyLogic®
TINYOPTO™
TinyPower™
TinyWire™
TruTranslation™
µSerDes™
UHC®
Across the board. Around the world.™
ActiveArray™
Bottomless™
Build it Now™
CoolFET™
CorePLUS™
CROSSVOLT™
CTL™
ImpliedDisconnect™
IntelliMAX™
ISOPLANAR™
MICROCOUPLER™
MicroPak™
MICROWIRE™
Motion-SPM™
MSX™
QS™
QT Optoelectronics™
Quiet Series™
RapidConfigure™
RapidConnect™
ScalarPump™
SMART START™
SPM®
STEALTH™
SuperFET™
SuperSOT™-3
SuperSOT™-6
SuperSOT™-8
SyncFET™
UniFET™
VCX™
Wire™
Current Transfer Logic™
DOME™
MSXPro™
OCX™
E2CMOS™
EcoSPARK®
EnSigna™
OCXPro™
OPTOLOGIC®
OPTOPLANAR®
PACMAN™
PDP-SPM™
POP™
FACT Quiet Series™
FACT®
FAST®
FASTr™
Power220®
Power247®
PowerEdge™
PowerSaver™
TCM™
FPS™
FRFET®
The Power Franchise®
™
GlobalOptoisolator™
GTO™
TinyBoost™
DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS
HEREIN TO IMPROVE RELIABILITY, FUNCTION, OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE
APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS
PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. THESE SPECIFICATIONS DO NOT EXPAND THE TERMS OF FAIRCHILD’S
WORLDWIDE TERMS AND CONDITIONS, SPECIFICALLY THE WARRANTY THEREIN, WHICH COVERS THESE PRODUCTS.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR
SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF FAIRCHILD SEMICONDUCTOR CORPORATION.
As used herein:
1. Life support devices or systems are devices or systems 2. A critical component in any component of a life support,
which, (a) are intended for surgical implant into the body or
(b) support or sustain life, and (c) whose failure to perform
when properly used in accordance with instructions for use
provided in the labeling, can be reasonably expected to
result in a significant injury of the user.
device, or system whose failure to perform can be
reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
PRODUCT STATUS DEFINITIONS
Definition of Terms
Datasheet Identification
Product Status
Definition
Advance Information
Formative or In Design
This datasheet contains the design specifications for product
development. Specifications may change in any manner without notice.
Preliminary
This datasheet contains preliminary data; supplementary data will be
published at a later date. Fairchild Semiconductor reserves the right to
make changes at any time without notice to improve design.
First Production
Full Production
Not In Production
No Identification Needed
Obsolete
This datasheet contains final specifications. Fairchild Semiconductor
reserves the right to make changes at any time without notice to improve
design.
This datasheet contains specifications on a product that has been
discontinued by Fairchild Semiconductor. The datasheet is printed for
reference information only.
Rev. I27
©1997 Fairchild Semiconductor Corporation
74VHCT244A Rev. 1.3
www.fairchildsemi.com
9
相关型号：
74VHCT244AMTCX_NL
Bus Driver, AHCT/VHCT Series, 2-Func, 4-Bit, True Output, CMOS, PDSO20, 4.40 MM, MO-153AC, TSSOP-20
FAIRCHILD
74VHCT244AMTC_NL
Bus Driver, ALVC/VCX/A Series, 2-Func, 4-Bit, True Output, CMOS, PDSO20, 4.40 MM, LEAD FREE, MO-153AC, TSSOP-20
FAIRCHILD
©2020 ICPDF网 联系我们和版权申明