74ABT244CSC 반도체 회로 부품 판매점
Octal Buffer/Line Driver with 3-STATE Outputs
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 Fairchild Semiconductor |
May 1992
Revised November 1999
74ABT244
Octal Buffer/Line Driver with 3-STATE Outputs
General Description
The ABT244 is an octal buffer and line driver with 3-STATE
outputs designed to be employed as a memory and
address driver, clock driver, or bus-oriented transmitter/
receiver.
Features
s Non-inverting buffers
s Output sink capability of 64 mA, source capability of
32 mA
s Guaranteed output skew
s Guaranteed multiple output switching specifications
s Output switching specified for both 50 pF and 250 pF
loads
s Guaranteed simultaneous switching, noise level and
dynamic threshold performance
s Guaranteed latchup protection
s High impedance glitch free bus loading during entire
power up and power down cycle
s Nondestructive hot insertion capability
s Disable time less than enable time to avoid bus conten-
tion
Ordering Code:
Order Number Package Number
Package Description
74ABT244CSC
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide Body
74ABT244CSJ
M20D
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74ABT244CMSA
MSA20
20-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide
74ABT244CMTC
MTC20
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
74ABT244CPC
N20A
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Connection Diagram
Pin Descriptions
Pin Names
Description
OE1, OE2
I0–I7
O0–O7
Output Enable Input
(Active LOW)
Inputs
Outputs
Truth Table
OE1 I0–3 O0–3 OE2 I4–7 O4–7
HXZHXZ
L HH L HH
LLLLLL
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
© 1999 Fairchild Semiconductor Corporation DS010992
www.fairchildsemi.com
Absolute Maximum Ratings(Note 1)
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
VCC Pin Potential to Ground Pin
Input Voltage (Note 2)
−0.5V to +7.0V
−0.5V to +7.0V
Input Current (Note 2)
−30 mA to +5.0 mA
Voltage Applied to Any Output
in the Disabled or
Power-Off State
−0.5V to 5.5V
in the HIGH State
Current Applied to Output
−0.5V to VCC
in LOW State (Max)
DC Latchup Source Current
twice the rated IOL (mA)
−500 mA
Over Voltage Latchup (I/O)
10V
Recommended Operating
Conditions
Free Air Ambient Temperature
Supply Voltage
Minimum Input Edge Rate (∆V/∆t)
Data Input
Enable Input
−40°C to +85°C
+4.5V to +5.5V
50 mV/ns
20 mV/ns
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
Parameter
Min
Typ
Max
Units
VCC
Conditions
VIH Input HIGH Voltage
VIL Input LOW Voltage
VCD Input Clamp Diode Voltage
VOH Output HIGH Voltage
VOL Output LOW Voltage
IIH Input HIGH Current
IBVI Input HIGH Current Breakdown Test
IIL Input LOW Current
VID Input Leakage Test
2.0
2.5
2.0
4.75
0.8
−1.2
0.55
1
1
7
−1
−1
V
V
V
V
V
µA
µA
µA
V
Recognized HIGH Signal
Recognized LOW Signal
Min IIN = −18 mA
Min IOH = −3 mA
Min IOH = −32 mA
IOL = 64 mA
Max VIN = 2.7V (Note 4)
VIN = VCC
Max VIN = 7.0V
Max VIN = 0.5V (Note 4)
VIN = 0.0V
0.0 IID = 1.9 µA
All Other Pins Grounded
IOZH
IOZL
IOS
ICEX
IZZ
ICCH
ICCL
ICCZ
ICCT
Output Leakage Current
Output Leakage Current
Output Short-Circuit Current
Output High Leakage Current
Bus Drainage Test
Power Supply Current
Power Supply Current
Power Supply Current
−100
Additional ICC/Input
Outputs Enabled
Outputs 3-STATE
Outputs 3-STATE
ICCD
Dynamic ICC
(Note 4)
No Load
Note 3: For 8 bits toggling, ICCD < 0.8 mA/MHz.
Note 4: Guaranteed, but not tested.
10
−10
−275
50
100
50
30
50
2.5
2.5
50
0.1
µA
µA
mA
µA
µA
µA
mA
µA
mA
mA
µA
mA/
MHz
0 − 5.5V
0 − 5.5V
Max
Max
0.0
Max
Max
Max
Max
Max
VOUT = 2.7V; OEn = 2.0V
VOUT = 0.5V; OEn = 2.0V
VOUT = 0.0V
VOUT = VCC
VOUT = 5.5V; All Others GND
All Outputs HIGH
All Outputs LOW
OEn = VCC,
All Others at VCC or Ground
VI = VCC − 2.1V
Enable Input VI = VCC − 2.1V
Data Input VI = VCC − 2.1V
All Others at VCC or Ground
Outputs OPEN
OEn = GND, (Note 3)
One Bit Toggling, 50% Duty Cycle
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74ABT244CSC driver
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관련 데이터시트
74ABT244CSC
Octal Buffer/Line Driver with 3-STATE Outputs - Fairchild Semiconductor
74ABT244CSJ
Octal Buffer/Line Driver with 3-STATE Outputs - Fairchild Semiconductor