ETC 74FR244SJX

Revised May 2001
74FR244
Octal Buffer/Line Driver with 3-STATE Outputs
General Description
Features
The 74FR244 is a non-inverting octal buffer and line driver
designed to be employed as memory and address driver,
clock driver and bus-oriented transmitter/receiver.
■ 3-STATE outputs drive bus lines or buffer memory
address registers
■ Outputs sink 64 mA and source 15 mA
■ Guaranteed pin-to-pin skew
Ordering Code:
Order Number
Package Number
Package Description
74FR244SC
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
74FR244SJ
M20D
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74FR244PC
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
L
L
L
L
H
H
H
X
Z
In
(Pins 3, 5, 7, 9)
Inputs
OE2
(Pins 12, 14, 16, 18)
Outputs
L
L
L
L
H
H
H
X
Z
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
© 2001 Fairchild Semiconductor Corporation
DS010900
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74FR244 Octal Buffer/Line Driver with 3-STATE Outputs
December 1990
74FR244
Absolute Maximum Ratings(Note 1)
Recommended Operating
Conditions
Storage Temperature
−65°C to +150°C
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)
twice the rated IOL (mA)
ESD Last Passing Voltage (Min)
Note 2: Either voltage limit or current limit is sufficient to protect inputs.
4000V
DC Electrical Characteristics
Symbol
Parameter
Min
Typ
Max
2.0
Units
VIH
Input HIGH Voltage
VIL
Input LOW Voltage
0.8
V
VCD
Input Clamp Diode Voltage
−1.2
V
VOH
Output HIGH Voltage
VCC
V
Conditions
Recognized HIGH Signal
Recognized LOW Signal
Min
IIN = −18 mA
2.4
V
Min
IOH = −3 mA
2.0
V
Min
IOH = −15 mA
VOL
Output LOW Voltage
0.55
V
Min
IOL = 64 mA
IIH
Input HIGH Current
5
µA
Max
VIN = 2.7V
IBVI
Input HIGH Current Breakdown Test
7
µA
Max
VIN = 7.0V
IIL
Input LOW Current
−150
µA
Max
VIN = 0.5V
VID
Input Leakage Test
V
0.0
IID = 1.9 µA,
IOD
Output Circuit Leakage Current
3.75
µA
0.0
VIOD = 150 mV,
IOZH
Output Leakage Current
20
µA
Max
VOUT = 2.7V
IOZL
Output Leakage Current
VOUT = 0.5V
IOS
Output Short-Circuit Current
ICEX
Output HIGH Leakage Current
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
30
50
mA
Max
All Outputs HIGH
ICCL
Power Supply Current
55
75
mA
Max
All Outputs LOW
ICCZ
Power Supply Current
35
50
mA
Max
Outputs 3-STATED
CIN
Input Capacitance
8.0
pF
5.0
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Symbol
tPLH
Parameter
Propagation Delay
tPHL
tPZH
Output Enable Time
tPZL
tPHZ
Output Disable Time
tPLZ
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
1.0
2.6
3.9
1.0
3.9
1.0
1.8
3.9
1.0
3.9
2.5
4.8
6.6
2.5
6.6
2.5
3.9
6.6
2.5
6.6
1.6
3.7
6.4
1.6
6.4
1.6
3.6
6.4
1.6
6.4
Units
ns
ns
ns
Extended AC 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)
tPLH
Propagation Delay
tPHL
tPZH
Output Enable Time
tPZL
tPHZ
Output Disable Time
tPLZ
tOSHL
Pin-to-Pin Skew
for HL Transitions (Note 5)
tOSLH
Pin-to-Pin Skew
for LH Transitions (Note 5)
tOST
Pin-to-Pin Skew
for HL/LH Transitions (Note 5)
Min
Max
Min
Max
1.0
5.0
2.3
7.3
1.0
5.0
2.3
7.3
2.5
7.7
2.5
7.7
1.6
6.5
1.6
6.5
ns
ns
ns
1.6
ns
1.0
ns
3.5
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, (tOST). Specification guaranteed with all outputs switching in phase.
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74FR244
AC Electrical Characteristics
74FR244
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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74FR244
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
Package Number M20D
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74FR244 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
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.
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
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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