FAIRCHILD 74FR2240SC

Revised August 1999
74FR2240
Octal Buffer/Line Driver
with 25Ω Series Resistors in the Outputs
General Description
Features
The 74FR2240 is an inverting octal buffer and line driver
designed to drive capacitive inputs of MOS memory
devices, address and clock lines or act as a low undershoot general purpose bus driver.
■ 3-STATE outputs drive bus lines or buffer memory
address registers
■ Outputs sink 12 mA and source 15 mA
■ 25Ω series resistors in outputs eliminate the need for
external resistors
■ Designed to drive the capacitive inputs of MOS devices
Ordering Code:
Order Number
Package Number
Package Description
74FR2240SC
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
74FR2240PC
N20A
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagram
Pin Descriptions
Pin Names
Description
OE1, OE2
Output Enable Input (Active-LOW)
I0–I7
Inputs
O0–O7
Outputs
Truth Tables
Inputs
Outputs
OE1
In
(Pins 12, 14, 16, 18)
L
L
H
L
H
L
H
X
Z
Inputs
Outputs
OE2
In
(Pins 3, 5, 7, 9)
L
L
H
L
H
L
H
X
Z
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
© 1999 Fairchild Semiconductor Corporation
DS010904
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74FR2240 Octal Buffer/Line Driver
January 1991
74FR2240
Absolute Maximum Ratings(Note 1)
Recommended Operating
Conditions
−65°C to +150°C
Storage Temperature
Ambient Temperature under Bias
−55°C to +125°C
Free Air Ambient Temperature
Junction Temperature under Bias
−55°C to +150°C
Supply Voltage
0°C to +70°C
+4.5V to +5.5V
−0.5V to +7.0V
VCC Pin Potential to Ground Pin
Input Voltage (Note 2)
−0.5V to +7.0V
Input Current (Note 2)
−30 mA to +5.0 mA
Voltage Applied to Output
in HIGH State (with VCC = 0V)
Standard Output
−0.5V to VCC
3-STATE Output
−0.5V 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.
Current Applied to Output
in LOW State (Max)
Note 2: Either voltage limit or current limit is sufficient to protect inputs.
Twice the Rated IOL (mA)
ESD Last Passing Voltage (Min)
4000V
DC Electrical Characteristics
Symbol
Parameter
Min
Typ
Max
VCC
V
Conditions
Input HIGH Voltage
VIL
Input LOW Voltage
0.8
V
VCD
Input Clamp Diode Voltage
−1.2
V
Min
VOH
Output HIGH Voltage
2.4
V
Min
IOH = −3 mA
2.0
V
Min
IOH = −15 mA
IOL = 1 mA
VOL
2.0
Units
VIH
Output LOW Voltage
IIH
Input HIGH Current
IBVI
Input HIGH Current
Breakdown Test
IIL
Input LOW Current
VID
Input Leakage Test
IOD
Output Circuit Leakage Current
IOZH
Output Leakage Current
IOZL
Output Leakage Current
IOS
Output Short-Circuit Current
ICEX
Output HIGH Leakage Current
Recognized HIGH Signal
Recognized LOW Signal
IIN = −18 mA
0.5
V
Min
0.75
V
Min
IOL = 12 mA
5
µA
Max
VIN = 2.7V
7
µA
Max
VIN = 7.0V
−150
µA
Max
VIN = 0.5V
V
0.0
IID = 1.9 µA
3.75
µA
0.0
VIOD = 150 mV
20
µA
Max
VOUT = 2.7V
VOUT = 0.5V
4.75
All Other Pins Grounded
All Other Pins Grounded
−100
−20
µA
Max
−225
mA
Max
VOUT = 0.0V
50
µA
Max
VOUT = VCC
IZZ
Bus Drainage Test
100
µA
0.0
VOUT = 5.25V
ICCH
Power Supply Current
9
13
mA
Max
All Outputs HIGH
ICCL
Power Supply Current
37
45
mA
Max
All Outputs LOW
ICCZ
Power Supply Current
30
38
mA
Max
Outputs 3-STATE
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2
Symbol
Parameter
TA = +25°C
TA = 0°C to +70°C
VCC = +5.0V
VCC = +5.0V
CL = 50 pF
CL = 50 pF
Min
Typ
Max
Min
Max
tPLH
Propagation Delay
1.7
3.3
4.7
1.7
4.7
tPHL
An to Bn or Bn to An
1.7
2.9
4.7
1.7
4.7
tPZH
Output Enable Time
2.6
4.0
8.5
2.6
8.5
2.6
6.3
8.5
2.6
8.5
2.1
3.9
6.6
2.1
6.6
2.1
3.4
6.6
2.1
6.6
tPZL
tPHZ
Output Disable Time
tPLZ
Units
ns
ns
ns
Extended AC Electrical Characteristics
Symbol
Parameter
TA = 0°C to +70°C
TA = 0°C to +70°C
VCC = +5.0V
VCC = +5.0V
CL = 50 pF
CL = 250 pF
Eight Outputs Switching
(Note 4)
Units
(Note 3)
Max
Min
tPLH
Propagation Delay
1.7
6.4
4.2
8.6
tPHL
An to Bn or Bn to An
1.7
6.4
4.2
8.6
tPZH
Output Enable Time
tPZL
tPHZ
Output Disable Time
tPLZ
tOSHL
Pin-to-Pin Skew
(Note 5)
for HL Transitions
tOSLH
Pin-to-Pin Skew
(Note 5)
for LH Transitions
tOST
Pin-to-Pin Skew
(Note 5)
for HL/LH Transitions
Min
2.6
8.9
2.6
8.9
2.1
6.8
2.1
6.8
Max
ns
ns
ns
1.0
ns
1.1
ns
3.0
ns
Note 3: 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 4: 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.
Note 5: Skew is defined as the absolute value of the difference between the actual propagation delays for any two outputs of the same device. The specification applies to any outputs switching HIGH-to-LOW, (tOSHL), LOW-to-HIGH, (tOSLH), or HIGH-to-LOW and/or LOW-to-HIGH, (t OST). Specifications guaranteed with all outputs switching in phase.
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74FR2240
AC Electrical Characteristics
74FR2240
Physical Dimensions inches (millimeters) unless otherwise noted
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
Package Number M20B
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74FR2240 Octal Buffer/Line Driver
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
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.
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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 THE PRESIDENT OF FAIRCHILD
SEMICONDUCTOR CORPORATION. As used herein:
2. A critical component in any component of a life support
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.
1. Life support devices or systems are devices or systems
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 to the
user.
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