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Fairchild Semiconductor Electronic Components Datasheet

74VHCT540A Datasheet

Octal Buffer/Line Driver with 3-STATE Outputs

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June 1997
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 dissi-
pation.
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 mis-
matched supply and input voltages.
Note 1: Outputs in OFF-STATE
Features
s High Speed: tPD = 5.4 ns (typ) at VCC = 5V
s Low Power Dissipation: ICC = 4 µA (max) at TA = 25°C
s Power down protection is provided on all inputs and
outputs
s Pin and function compatible with 74HCT540
Ordering Code:
Order Number Package Number
Package Dissipation
74VHCT540AM
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
74VHCT540ASJ
M20D
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74VHCT540AMTC
MTC20
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
74VHCT540AN
N20A
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.
Logic Symbol
Connection Diagram
IEEE/IEC
Pin Descriptions
Pin Names
Description
OE1, OE2
I0 - I7
O0 - O7
3-STATE Output Enable Inputs
Inputs
3-STATE Outputs
© 1999 Fairchild Semiconductor Corporation DS500012.prf
Truth Table
OE1
L
H
X
L
H = HIGH Voltage Level
L = LOW Voltage Level
Inputs
OE2
I
Outputs
LH
L
XX
Z
HX
Z
LL
H
X = Immaterial
Z = High Impedance
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Fairchild Semiconductor Electronic Components Datasheet

74VHCT540A Datasheet

Octal Buffer/Line Driver with 3-STATE Outputs

No Preview Available !

Absolute Maximum Ratings(Note 2)
Supply Voltage (VCC)
DC Input Voltage (VIN)
DC Output Voltage (VOUT)
(Note 3)
(Note 4)
Input Diode Current (IIK)
Output Diode Current (IOK)
(Note 5)
DC Output Current (IOUT)
DC VCC/GND Current (ICC)
Storage Temperature (TSTG)
Lead Temperature (TL)
(Soldering, 10 seconds)
0.5V to +7.0V
0.5V to +7.0V
0.5V to +7.0V
0.5V to VCC + 0.5V
20 mA
±20 mA
±25 mA
±75 mA
65°C to +150°C
260°C
Recommended Operating
Conditions (Note 6)
Supply Voltage (VCC)
Input Voltage (VIN)
Output Voltage (VOUT)
(Note 4)
(Note 3)
4.5V to +5.5V
0V to +5.5V
0V to VCC
0V to 5.5V
Operating Temperature (TOPR)
40°C to +85°C
Input Rise and Fall Time (tr, tf)
VCC = 5.0V ± 0.5V
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 specifica-
tions should be met, without exception, to ensure that the system design is
reliable over its power supply, temperature, and output/input loading vari-
ables. Fairchild does not recommend operation outside databook specifica-
tions.
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
VIH
VIL
VOH
VOL
IOZ
IIN
ICC
ICCT
Parameter
VCC
(V)
HIGH Level Input Voltage 4.5 5.5
LOW Level Input Voltage 4.5 5.5
HIGH Level
4.5
Output Voltage
4.5
LOW Level
4.5
Output Voltage
4.5
3-STATE Output
OFF-STATE Current
5.5
Input Leakage Current
0 5.5
Quiescent Supply Current 5.5
Maximum ICC/input
5.5
IOFF
Output Leakage Current
0
Min
2.0
4.4
3.94
TA = 25°C
Typ
Max
0.8
4.5
0.0 0.1
0.36
±0.25
±0.1
4.0
1.35
0.5
TA = −40°C to +85°C Units
Min Max
Conditions
2.0 V
0.8 V
4.4
3.80
0.1
0.44
±2.5
±1.0
40.0
1.50
5.0
V VIN = VIH IOH = −50 µA
V or VIL IOH = −8 mA
V VIN = VIH IOL = 50 µA
V or VIL IOL = 8 mA
µA
VIN = VIH or VIL
VOUT = VCC or GND
µA VIN = 5.5V or GND
µA VIN = VCC or GND
mA
VIN = 3.4V
other inputs = VCC or GND
µA VOUT = 5.5V
Noise Characteristics
Symbol
Parameter
VOLP
(Note 7)
VOLV
(Note 7)
VIHD
(Note 7)
Quiet Output Maximum
Dynamic VOL
Quiet Output Minimum
Dynamic VOL
Minimum HIGH Level Dynamic
Input Voltage
VILD
(Note 7)
Maximum HIGH Level Dynamic
Input Voltage
Note 7: Parameter guaranteed by design.
VCC
TA = 25°C
Units
(V) Typ Limits
Conditions
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
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2


Part Number 74VHCT540A
Description Octal Buffer/Line Driver with 3-STATE Outputs
Maker Fairchild Semiconductor
Total Page 6 Pages
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