Datasheet 74F2244SCX, 74F2244SC, 74F2244PC, 74F2244MSAX, 74F2244MSA Datasheet (Fairchild Semiconductor)
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October 1988
Revised March 1999
74F2244 Octal Buffer/Line Driver with 25Ω Series Resistors in Outputs
© 1999 Fairchild Semiconductor Corporation DS009499.prf www.fairchildsemi.com
74F2244
Octal Buffer/Line Driver
with 25Ω Series Resistors in Outputs
General Description
The F2244 is an o ctal buffer/line driver designed to drive
the capacitive inputs of MOS memory drivers, address drivers, clock drivers and bus-oriented transmitters/receivers.
The 25Ω series resist ors i n the outputs reduc e rin ging a nd
eliminate the need for external resistors.
Features
■ 3-STATE outputs drive bus lines or buffer memory
address registers
■ 12 mA source current
■ 25Ω series resistors in outputs eliminate the need for
external resistors.
■ Designed to drive the capacitive inputs of MOS devices
■ Guarante ed 4000V minimum ESD protection
Ordering Code:
Devices also availab le in Tape and Reel. Specify by appending th e s uffix let t er “X” to the ordering cod e.
Connection Diagram Logic Symbol
IEEE/IEC
Order Number Package Number Package Description
74F2244SC M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
74F2244MSA MSA20 20-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide
74F2244PC N20A 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
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74F2244
Unit Loading/Fan Out
Note 1: Worst-case F2244 disabled
Truth Table
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
Pin Names Description
U.L. Input I
IH/IIL
HIGH/LOW Output IOH/I
OL
OE1, OE23-STATE Output Enable Input (Active LOW) 1.0/1.667 20 µA/−1 mA
OE
2
3-STATE Output Enable Input (Active HIGH) 1.0/1.667 20 µA/−1 mA
I
an
, I
bn
Inputs 1.0/2.667 (Note 1) 20 µA/−1.6 mA
O
an,Obn
Outputs 750/20 −15 mA/12 mA
OE
1
I
an
O
an
OE
2
I
bn
O
bn
HXZHXZ
LHHLHH
LLLLLL
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74F2244
Absolute Maximum Ratings(Note 2) Recommended Operating
Conditions
Note 2: Absolute maximum ratings are values beyon d which the device
may be damaged or have its useful life impaired . Functional operation
under these condit ions is not implied.
Note 3: Either voltage limit or curren t limit is sufficient to protect in puts.
DC Electrical Characteristics
Storage Temperature −65°C to +150°C
Ambient Temperature under Bias −55°C to +125°C
Junction Temperature under Bias −55°C to +150°C
V
CC
Pin Potential to Ground Pin −0.5V to +7.0V
Input Voltage (Note 3) −0.5V to +7.0V
Input Current (Note 3) −30 mA to +5.0 mA
Voltage Applied to Output
in HIGH State (with V
CC
= 0V)
Standard Output −0.5V to V
CC
3-STATE Output −0.5V to +5.5V
Current Applied to Output
in LOW State (Max) twice the rated I
OL
(mA)
ESD Last Passing Voltage (Mi n) 4000V
Free Air Ambi ent Temperature 0°C to +70°C
Supply Voltage +4.5V to +5.5V
Symbol Parameter Min Typ Max Units
V
CC
Conditions
V
IH
Input HIGH Voltage 2.0 V Recognized as a HIGH Signal
V
IL
Input LOW Voltage 0.8 V Recognized as a LOW Signal
V
CD
Input Clamp Diode Voltage −1.2 V Min IIN = −18 mA
V
OH
Output HIGH Voltage 10% V
CC
2.4 V Min IOH = −3 mA
10% V
CC
2.0 IOH = −15 mA
5% V
CC
2.7 IOH = −3 mA
V
OL
Output LOW Voltage 0.50 V Min IOL = 1 mA
0.75 IOL = 12 mA
I
IH
Input HIGH Current 5.0 µAMaxVIN = 2.7V
I
BVI
Input HIGH Current Breakdown Test 7.0 µAMaxVIN = 7.0V
I
CEX
Output HIGH Leakage Current 50 µAMaxV
OUT
= V
CC
V
ID
Input Leakage 4.75 V 0.0 IID = 1.9 µA
Test All other pins grounded
I
OD
Output Leakage 3.75 µA0.0V
IOD
= 150 mV
Circuit Current All other pins grounded
I
IL
Input LOW Current −1.0 mA Max VIN = 0.5V (OE1, OE2, OE2)
−1.6 VIN = 0.5V (In)
I
OZH
Output Leakage Current 50 µAMaxV
OUT
= 2.7V
I
OZL
Output Leakage Current −50 µAMaxV
OUT
= 0.5V
I
OS
Output Short-Circuit Current −100 −225 mA Max V
OUT
= 0V
I
CCH
Power Supply Current 40 60 mA Max VO = HIGH
I
CCL
Power Supply Current 60 90 mA Max VO = LOW
I
CCZ
Power Supply Current 60 90 mA Max VO = HIGH Z
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74F2244
AC Electrical Characteristics
Symbol Parameter
TA = +25°CT
A
= −55°C to +125°CTA = 0°C to +70°C
Units
VCC = +5.0V CL = 50 pF CL = 50 pF
CL = 50 pF
Min Typ Max Min Max Min Max
t
PLH
Propagation Delay 1.5 7.0 2.0 6.5 1.5 7.0 ns
t
PHL
Data to Output 2.5 8.0 2.0 7.0 2.0 8.0
t
PZH
Output Enable Time 1.5 9.0 2.0 7.0 1.0 9.5
t
PZL
2.5 11.5 2.0 8.5 2.5 12.0 ns
t
PHZ
Output Disable Time 1.5 9.0 2.0 7.0 1.0 9.5
t
PLZ
1.5 8.5 2.0 7.5 1.5 9.5
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74F2244
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 Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide
Package Number MSA20
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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.
74F2244 Octal Buffer/Line Driver with 25Ω Series Resistors in Outputs
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:
1. Life support devices or systems are devices or syste ms
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 inju ry to the
user.
2. A critical component i n any compon ent of a lif e support
device or system whose failu re to perform can be reasonably expected to ca use the fa i lure of the life su pp ort
device or system, or to affect its safety or effectiveness.
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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
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