FAIRCHILD 74VHCT240AM_07

74VHCT240A
Octal Buffer/Line Driver with 3-STATE Outputs
tm
Features
General Description
■ High Speed: tPD = 5.6ns (Typ.) at VCC = 5V
■ Power down protection is provided on inputs and
The VHCT240A is an advanced high speed CMOS octal
bus transceiver fabricated with silicon gate CMOS
technology. It achieves high speed operation similar to
equivalent Bipolar Schottky TTL while maintaining the
CMOS low power dissipation. The VHCT240A is an
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.
outputs
■ Low power dissipation: ICC = 4µA (Max.) @ TA = 25°C
■ Pin and function compatible with 74HCT240
Protection circuits ensure that 0V to 7V can be applied to
the input and output(1) 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
Package
Number
Package Description
74VHCT240AM
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
74VHCT240ASJ
M20D
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
Order Number
74VHCT240AMTC
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
74VHCT240A Rev. 1.3
www.fairchildsemi.com
74VHCT240A Octal Buffer/Line Driver with 3-STATE Outputs
May 2007
Logic Symbol
IEEE/IEC
Pin Description
Pin Names
Description
OE1, OE2
3-STATE Output Enable
I0–I7
Inputs
O0–O7
Outputs 3-STATE Outputs
Truth Tables
Inputs
OE1
In
Outputs
(Pins 12, 14, 16, 18)
L
L
H
L
H
L
H
X
Z
OE1
In
Outputs
(Pins 3, 5, 7, 9)
L
L
H
L
H
L
H
X
Z
Inputs
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
©1997 Fairchild Semiconductor Corporation
74VHCT240A Rev. 1.3
www.fairchildsemi.com
2
74VHCT240A Octal Buffer/Line Driver with 3-STATE Outputs
Connection Diagram
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
VCC
Supply Voltage
–0.5V to +7.0V
VIN
DC Input Voltage
–0.5V to +7.0V
VOUT
DC Output Voltage
Note 2
–0.5V to VCC + 0.5V
Note 3
–0.5V to +7.0V
IIK
Input Diode Current
–20mA
IOK
Output Diode Current(4)
±20mA
IOUT
DC Output Current
±25mA
ICC
DC VCC / GND Current
TSTG
TL
±75mA
Storage Temperature
–65°C to +150°C
Lead Temperature (Soldering, 10 seconds)
260°C
Recommended Operating Conditions(5)
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
VCC
VIN
VOUT
Parameter
Rating
Supply Voltage
4.5V to +5.5V
Input Voltage
0V to +5.5V
Output Voltage
Note 2
0V to VCC
Note 3
0V to +5.5V
TOPR
Operating Temperature
–40°C to +85°C
tr , tf
Input Rise and Fall Time, VCC = 5.0V ± 0.5V
0ns/V ~ 20ns/V
Notes:
2. HIGH or LOW state. IOUT absolute maximum rating must be observed.
3. When outputs are in OFF-State or when VCC = 0V.
4. VOUT < GND, VOUT > VCC (Outputs Active).
5. Unused inputs must be held HIGH or LOW. They may not float.
©1997 Fairchild Semiconductor Corporation
74VHCT240A Rev. 1.3
www.fairchildsemi.com
3
74VHCT240A Octal Buffer/Line Driver with 3-STATE Outputs
Absolute Maximum Ratings
TA = –40°C
to +85°C
TA = 25°C
Symbol
Parameter
V CC (V)
Conditions
Min.
Typ.
Max.
Min.
Max. Units
VIH
HIGH Level Input
Voltage
4.5
2.0
5.5
2.0
VIL
LOW Level Input
Voltage
4.5
0.8
0.8
5.5
0.8
0.8
HIGH Level Output
Voltage
4.5
LOW Level Output
Voltage
4.5
IOZ
3-STATE Output
Off-State Current
5.5
IIN
Input Leakage
Current
ICC
VOH
VOL
VIN = VIH IOH = –50µA
or VIL
IOH = –8mA
4.40
2.0
V
2.0
4.50
4.40
3.94
V IN = VIH IOL = 50µA
or VIL
IOL = 8mA
V
V
3.80
0.0
0.1
0.1
0.36
0.44
V
VIN = VIH or VIL,
VOUT = VCC or GND
±0.25
±2.5
µA
0–5.5
VIN = 5.5V or GND
±0.1
±1.0
µA
Quiescent Supply
Current
5.5
VIN = VCC or GND
4.0
40.0
µA
ICCT
Maximum ICC / Input
5.5
VIN = 3.4V, Other
Input = VCC or GND
1.35
1.50
mA
IOFF
Output Leakage
Current (Power
Down State)
0.0
VOUT = 5.5V
0.5
5.0
µA
Noise Characteristics
TA = 25°C
Symbol
Parameter
V CC (V)
Conditions
Typ.
Limits
Units
Quiet Output Maximum
Dynamic VOL
5.0
CL = 50pF
0.9
1.1
V
VOLV(6)
Quiet Output Minimum
Dynamic VOL
5.0
CL = 50pF
–0.9
–1.1
V
VIHD(6)
Minimum HIGH Level
Dynamic Input Voltage
5.0
CL = 50pF
2.0
V
VILD(6)
Maximum LOW Level
Dynamic Input Voltage
5.0
CL = 50pF
0.8
V
VOLP
(6)
Note:
6. Parameter guaranteed by design.
©1997 Fairchild Semiconductor Corporation
74VHCT240A Rev. 1.3
www.fairchildsemi.com
4
74VHCT240A Octal Buffer/Line Driver with 3-STATE Outputs
DC Electrical Characteristics
TA = –40°C
to +85°C
TA = 25°C
Symbol
tPLH, tPHL
tPZL, tPZH
tPLZ, tPHZ
Parameter
VCC (V)
Conditions
Typ. Max. Min. Max. Units
CL = 15pF
5.6
7.8
1.0
9.0
CL = 50pF
6.1
8.8
1.0
10.0
3-STATE Output
Enable Time
5.0 ± 0.5 RL = 1kΩ CL = 15pF
6.5
10.4
1.0
12.5
CL = 50pF
7.3
11.4
1.0
13.5
3-STATE Output
Disable Time
5.0 ± 0.5 RL = 1kΩ CL = 50pF
7.0
11.4
1.0
13.0
ns
1.0
1.0
ns
10
10
pF
Propagation Delay
Time
5.0 ± 0.5
tOSLH, tOSHL Output to Output
Skew
5.0 ± 0.5 (7)
Input Capacitance
VCC = Open
COUT
Output Capacitance
CPD
Power Dissipation
Capacitance
VCC
(8)
CIN
Min.
= 5.0V
4
ns
ns
9
pF
19
pF
Notes:
7. Parameter guaranteed by design. tOSLH = |tPLH max – tPLH min|; tOSHL = |tPHL max – tPHL min|
8. CPD is defined as the value of the internal equivalent capacitance which is calculated from the operating
current consumption without load. Average operating current can be obtained by the equation:
ICC (Opr.) = CPD • VCC • fIN + ICC / 8 (per F/F). The total CPD when n pcs. of the Octal D Flip-Flop operates
can be calculated by the equation: CPD (total) = 20 + 12n
©1997 Fairchild Semiconductor Corporation
74VHCT240A Rev. 1.3
www.fairchildsemi.com
5
74VHCT240A Octal Buffer/Line Driver with 3-STATE Outputs
AC Electrical Characteristics
74VHCT240A Octal Buffer/Line Driver with 3-STATE Outputs
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
74VHCT240A Rev. 1.3
www.fairchildsemi.com
6
74VHCT240A Octal Buffer/Line Driver with 3-STATE Outputs
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
74VHCT240A Rev. 1.3
www.fairchildsemi.com
7
74VHCT240A Octal Buffer/Line Driver with 3-STATE Outputs
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
74VHCT240A Rev. 1.3
www.fairchildsemi.com
8
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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
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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:
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which, (a) are intended for surgical implant into the body or
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when properly used in accordance with instructions for use
provided in the labeling, can be reasonably expected to
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2. A critical component in any component of a life support,
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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
First Production
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.
No Identification Needed
Full Production
This datasheet contains final specifications. Fairchild Semiconductor
reserves the right to make changes at any time without notice to improve
design.
Obsolete
Not In Production
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
74VHCT240A Rev. 1.3
www.fairchildsemi.com
9
74VHCT240A Octal Buffer/Line Driver with 3-STATE Outputs
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