74FR16540 16-Bit Buffer/Line Driver with 3-STATE Outputs
October 1989
Revised August 1999
74FR16540
16-Bit Buffer/Line Driver with 3-STATE Outputs
General Description
The 74FR16540 contains sixteen inverting buffers with 3-
STATE outputs designed to be employed as a memory and
address driver, clock driver, or bus-oriented transmitter/
receiver. The device is byte controlled. Each byte has sep-
arate 3-STATE control inputs which can be shorted
together for full 16-bit operation.
Features
s
Inverting buffers
s
3-STATE outputs drive bus lines
s
Output sink capability of 64 mA, source capability of
15 mA
s
Separate 3-STATE control pins for each byte
s
Guaranteed 4000V minimum ESD protection
s
Guaranteed multiple output switching, 250 pF delays
and pin-to-pin skew
s
16-bit version of the 74F540, 74F240, or 74FR240
Ordering Code:
Order Number
74FR16540QC
74FR16540SSC
Package Number
V44A
MS48A
Package Description
44-Lead Plastic Lead Chip Carrier (PLCC), JEDEC MO-047, 0.650 Square
48-Lead Small Shrink Outline Package (SSOP), JEDEC MO-118, 0.300 Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagrams
Pin Assignment for SSOP
Pin Assignment for PLCC
Logic Symbol
© 1999 Fairchild Semiconductor Corporation
DS010615
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74FR16540
Pin Descriptions
Pin Names
OE
n
I
0
–I
15
O
0
–O
15
Description
Output Enable Inputs
Inputs
3-STATE Outputs
Truth Table
Inputs
Byte1 [0:7] Byte2 [8:15]
OE
1
L
H
X
L
L
H
L
H
=
HIGH Voltage Level
L
=
LOW Voltage Level
X
=
Immaterial
Z
=
High Impedance
Outputs
I
0
–I
7
I
8
–I
15
H
X
X
L
H
X
L
H
L
H
X
X
X
L
O
0
–O
7
O
8
–O
15
L
Z
Z
H
L
Z
H
L
H
L
Z
Z
Z
H
OE
2
L
X
H
L
L
H
L
OE
3
L
L
L
H
X
H
L
OE
4
L
L
L
X
H
H
L
Logic Diagram
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74FR16540
Absolute Maximum Ratings
(Note 1)
Storage Temperature
Ambient Temperature under Bias
Junction Temperature under Bias
V
CC
Pin Potential to Ground Pin
Input Voltage (Note 2)
Input Current (Note 2)
Voltage Applied to Output
in HIGH State (with V
CC
=
0V)
Standard Output
3-STATE Output
Current Applied to Output
in LOW State (Max)
ESD Last Passing Voltage (Min)
Twice the Rated I
OL
(mA)
4000V
−0.5V
to V
CC
−0.5V
to
+5.5V
−65°C
to
+150°C
−55°C
to
+125°C
−55°C
to
+150°C
−0.5V
to
+7.0V
−0.5V
to
+7.0V
−30
mA to
+5.0
mA
Recommended Operating
Conditions
Free Air Ambient Temperature
Supply Voltage
0°C to
+70°C
+4.5V
to
+5.5V
Note 1:
Absolute maximum ratings are values beyond which the device
may be damaged or have its useful life impaired. Functional operation
under these conditions is not implied.
Note 2:
Either voltage limit or current limit is sufficient to protect inputs.
DC Electrical Characteristics
Symbol
V
IH
V
IL
V
CD
V
OH
V
OL
I
IH
I
BVI
I
IL
I
OS
I
OZH
I
OZL
I
CEX
V
ID
I
OD
I
ZZ
I
CCH
I
CCL
I
CCZ
C
IN
Parameter
Input HIGH Voltage
Input LOW Voltage
Input Clamp Diode Voltage
Output HIGH Voltage
Output LOW Voltage
Input HIGH Current
Input HIGH Current
Breakdown Test
Input LOW Current
Output Short-Circuit Current
Output Leakage Current
Output Leakage Current
Output HIGH Leakage Current
Input Leakage Test
Output Circuit
Leakage Current
Bus Drainage Test
Power Supply Current
Power Supply Current
Power Supply Current
Input Capacitance
14
75
38
8
4.75
−100
0
0
2.4
2.0
0.55
5.0
7.0
−120
−225
20
−20
50
Min
2.0
0.8
−1.2
Typ
Max
Units
V
V
V
V
V
µA
µA
µA
mA
µA
µA
µA
V
Min
Min
Min
Max
Max
Max
Max
Max
Max
Max
0.0
V
CC
Conditions
Recognized as a HIGH Signal
Recognized as a LOW Signal
I
IN
= −18
mA
I
OH
= −3
mA
I
OH
= −15
mA
I
OL
=
64 mA
V
IN
=
2.7V
V
IN
=
7.0V
(OE
n
)
V
IN
=
0.5V
V
OUT
=
0V
V
OUT
=
2.7V
V
OUT
=
0.5V
V
OUT
=
V
CC
I
ID
=
1.9
µA
All Other Pins Grounded
3.75
100
20
92
50
µA
µA
mA
mA
mA
pF
0.0
0.0
Max
Max
Max
5.0
V
IOD
=
150 mV
All Other Pins Grounded
V
OUT
=
5.25V
V
O
=
HIGH
V
O
=
LOW
V
O
=
HIGH Z
3
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74FR16540
AC Electrical Characteristics
T
A
= +25°C
Symbol
Parameter
Min
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
Output Disable Time
Propagation Delay
In to On
Output Enable Time
1.0
1.0
3.4
3.4
1.8
1.8
V
CC
= +5.0V
C
L
=
50 pF
Typ
2.8
2.0
5.6
7.8
4.0
4.4
Max
4.3
4.3
11.6
11.6
6.6
6.6
T
A
=
0°C to
+70°C
V
CC
= +5.0V
C
L
=
50 pF
Min
1.0
1.0
3.4
3.4
1.8
1.8
Max
4.3
4.3
11.6
11.6
6.6
6.6
ns
ns
ns
Units
Extended AC Characteristics
T
A
=
0°C to
+70°C
V
CC
= +5.0V
Symbol
Parameter
C
L
=
50 pF
16 Outputs Switching
(Note 4)
Min
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
t
OSHL
(Note 3)
t
OSLH
(Note 3)
t
OST
(Note 3)
Pin-to-Pin Skew
for HL Transitions
Pin-to-Pin Skew
for LH Transitions
Pin-to-Pin Skew
for HL/LH Transitions
3.0
Output Disable Time
Propagation Delay
In to On
Output Enable Time
1.0
1.0
3.4
3.4
1.8
1.8
Max
6.0
6.0
14.5
14.5
6.6
6.6
1.4
1.6
Min
3.2
3.2
(Note 5)
Max
8.2
8.2
ns
ns
ns
ns
ns
ns
T
A
=
0°C to
+70°C
V
CC
= +5.0V
C
L
=
250 pF
Units
Note 3:
Skew is defined as the absolute value of the difference between the actual propagation delays for any two outputs of the same device. The specifi-
cation applies to any outputs switching HIGH-to-LOW (t
OSHL
), LOW-to-HIGH, (t
OSLH
), or HIGH-to-LOW and/or LOW-to-HIGH, (t
OST
). Specifications guaran-
teed with all outputs switching in phase. This specification is guaranteed but not tested.
Note 4:
This specification is guaranteed but not tested. The limits apply to propagation delays for all paths described switching in phase,
i.e., all LOW-to-HIGH, HIGH-to-LOW, 3-STATE-to-HIGH, etc.
Note 5:
These specifications guaranteed but not tested. The limits represent propagation delays with 250 pF load capacitors in place of the 50 pF load
capacitors in the standard AC load. This specification pertains to single output switching only.
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74FR16540
Physical Dimensions
inches (millimeters) unless otherwise noted
44-Lead Plastic Lead Chip Carrier (PLCC), JEDEC MO-047, 0.650 Square
Package Number V44A
5
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