FAIRCHILD 74VHCT540AMTCX

Revised April 1999
74VHCT540A
Octal Buffer/Line Driver with 3-STATE Outputs
General Description
The VHCT540A is an advanced high-speed CMOS device
fabricated with silicon gate CMOS technology. It achieves
the high-speed operation similar to equivalent Bipolar
Schottky TTL while maintaining the CMOS low power dissipation.
The VHCT540A is an octal buffer/line driver designed to be
employed as memory and address drivers, clock drivers
and bus oriented transmitter/receivers.
This device is similar in function to the VHCT240A while
providing flow-through architecture (inputs on opposite side
from outputs). This pinout arrangement makes this device
especially useful as an output port for microprocessors,
allowing ease of layout and greater PC board density.
Protection circuits ensure that 0V to 7V can be applied to
the input and output (Note 1) pins without regard to the
supply voltage. This device can be used to interface 3V to
5V systems and two supply systems such as battery
backup. This circuit prevents device destruction due to mismatched supply and input voltages.
Note 1: Outputs in OFF-STATE
Features
■ High Speed: tPD = 5.4 ns (typ) at VCC = 5V
■ Low Power Dissipation: ICC = 4 µA (max) at TA = 25°C
■ Power down protection is provided on all inputs and
outputs
■ Pin and function compatible with 74HCT540
Ordering Code:
Order Number
Package Number
74VHCT540AM
74VHCT540ASJ
74VHCT540AMTC
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
M20D
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
MTC20
74VHCT540AN
Package Dissipation
M20B
N20A
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Surface mount packages are also available on Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagram
Logic Symbol
IEEE/IEC
Pin Descriptions
Pin Names
Truth Table
Description
Inputs
OE1, OE2
3-STATE Output Enable Inputs
I0 - I7
Inputs
O0 - O7
3-STATE Outputs
I
L
L
H
L
H
X
X
Z
X
H
X
Z
L
L
L
H
H = HIGH Voltage Level
L = LOW Voltage Level
© 1999 Fairchild Semiconductor Corporation
DS500012.prf
Outputs
OE2
OE1
X = Immaterial
Z = High Impedance
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74VHCT540A Octal Buffer/Line Driver with 3-STATE Outputs
June 1997
74VHCT540A
Absolute Maximum Ratings(Note 2)
Supply Voltage (VCC )
−0.5V to +7.0V
DC Input Voltage (VIN)
−0.5V to +7.0V
Recommended Operating
Conditions (Note 6)
4.5V to +5.5V
Supply Voltage (VCC)
DC Output Voltage (VOUT)
0V to +5.5V
Input Voltage (VIN)
(Note 3)
−0.5V to +7.0V
(Note 4)
−0.5V to VCC + 0.5V
(Note 4)
0V to VCC
−20 mA
(Note 3)
0V to 5.5V
Input Diode Current (IIK)
Output Voltage (VOUT)
Output Diode Current (IOK)
−40°C to +85°C
Operating Temperature (TOPR)
±20 mA
(Note 5)
DC Output Current (IOUT)
±25 mA
DC VCC/GND Current (ICC)
±75 mA
Input Rise and Fall Time (tr, tf)
VCC = 5.0V ± 0.5V
−65°C to +150°C
Storage Temperature (TSTG)
Lead Temperature (TL)
(Soldering, 10 seconds)
0 ≈ 20 ns/V
Note 2: Absolute Maximum Ratings are values beyond which the device
may be damaged or have its useful life impaired. The databook specifications should be met, without exception, to ensure that the system design is
reliable over its power supply, temperature, and output/input loading variables. Fairchild does not recommend operation outside databook specifications.
260°C
Note 3: When outputs are in OFF-STATE or when VCC = OV.
Note 4: HIGH or LOW state. IOUT absolute maximum rating must be
observed.
Note 5: VOUT <GND, VOUT > VCC (outputs active).
Note 6: Unused inputs must be held HIGH or LOW. They may not float.
DC Electrical Characteristics
Symbol
VCC
(V)
Parameter
TA = 25°C
Min
TA = −40°C to +85°C
Typ
Max
Min
Max
Units
Conditions
VIH
HIGH Level Input Voltage 4.5 − 5.5
VIL
LOW Level Input Voltage
VOH
HIGH Level
4.5
4.4
Output Voltage
4.5
3.94
LOW Level
4.5
0.1
0.1
V
Output Voltage
4.5
0.36
0.44
V
IOZ
3-STATE Output
OFF-STATE Current
5.5
±0.25
±2.5
µA
VIN = VIH or VIL
VOUT = VCC or GND
IIN
Input Leakage Current
0 − 5.5
±0.1
±1.0
µA
VIN = 5.5V or GND
ICC
Quiescent Supply Current
5.5
4.0
40.0
µA
VIN = VCC or GND
ICCT
Maximum ICC/input
5.5
1.35
1.50
mA
VIN = 3.4V
other inputs = VCC or GND
IOFF
Output Leakage Current
0
0.5
5.0
µA
VOUT = 5.5V
VOL
2.0
2.0
4.5 − 5.5
V
0.8
0.8
4.5
0.0
V
4.4
V
3.80
V
VIN = VIH
IOH = −50 µA
or VIL IOH = −8 mA
VIN = VIH
IOL = 50 µA
or VIL IOL = 8 mA
Noise Characteristics
Symbol
Parameter
VOLP
Quiet Output Maximum
(Note 7)
Dynamic VOL
VOLV
Quiet Output Minimum
(Note 7)
Dynamic VOL
VIHD
Minimum HIGH Level Dynamic
(Note 7)
Input Voltage
VILD
Maximum HIGH Level Dynamic
(Note 7)
Input Voltage
TA = 25°C
VCC
(V)
Typ
Limits
5.0
1.2
1.6
V
CL = 50 pF
5.0
−1.2
1.6
V
CL = 50 pF
5.0
2.0
V
CL = 50 pF
5.0
0.8
V
CL = 50 pF
Note 7: Parameter guaranteed by design.
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2
Units
Conditions
Symbol
Parameter
tPLH
Propagation Delay
tPHL
Time
tPZL
3-STATE Output
tPZH
Enable Time
tPLZ
3-STATE Output
tPHZ
Disable Time
tOSLH
Output to Output
tOSHL
Skew
CIN
Input Capacitance
COUT
Output Capacitance
CPD
Power Dissipation Capacitance
VCC
(V)
5.0 ± 0.5
5.0 ± 0.5
5.0 ± 0.5
TA = 25°C
Min
TA = −40°C to +85°C
Typ
Max
Min
Max
5.4
7.4
1.0
8.5
5.9
8.4
1.0
9.5
8.3
11.3
1.0
13.0
8.8
12.3
1.0
14.0
9.4
11.9
1.0
13.5
5.0 ± 0.5
Units
Conditions
CL = 15 pF
ns
CL = 50 pF
CL = 15 pF
ns
RL = 1 kΩ
ns
RL = 1 kΩ CL = 50 pF
CL = 50 pF
CL = 50 pF
1.0
1.0
ns
(Note 8)
10
10
pF
VCC = Open
9
pF
VCC = 5.0V
19
pF
(Note 9)
4
Note 8: Parameter guaranteed by design. tOSLH = |tPLHmax − t PLHmin|; tOSLH = |tPHLmax − tPHLmin|.
Note 9: 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 bit).
3
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74VHCT540A
AC Electrical Characteristics
74VHCT540A
Physical Dimensions inches (millimeters) unless otherwise noted
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
Package Number M20B
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
Package Number M20D
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4
74VHCT540A
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Package Number MTC20
5
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74VHCT540A Octal Buffer/Line Driver with 3-STATE Outputs
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Package Number N20A
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 THE PRESIDENT OF FAIRCHILD
SEMICONDUCTOR CORPORATION. As used herein:
2. A critical component in any component of a life support
1. Life support devices or systems are devices or systems
device or system whose failure to perform can be reawhich, (a) are intended for surgical implant into the
sonably expected to cause the failure of the life support
body, or (b) support or sustain life, and (c) whose failure
device or system, or to affect its safety or effectiveness.
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 to the
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user.
Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications.