MC74VHCT244AML1
MOTOROLA MC74VHCT244AML1, MC74VHCT244AML2, MC74VHCT244ADWR2, MC74VHCT244ADT, MC74VHCT244ADTEL Datasheet
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SEMICONDUCTOR TECHNICAL DATA
1
REV 0
Motorola, Inc. 1997
6/97
!
"
The MC74VHCT244A is an advanced high speed CMOS octal bus buffer
fabricated with silicon gate CMOS technology. It achieves high speed
operation similar to equivalent Bipolar Schottky TTL while maintaining
CMOS low power dissipation.
The MC74VHCT244A is a noninverting 3–state buffer, and has two
active–low output enables. This device is designed to be used with 3–state
memory address drivers, etc.
The VHCT inputs are compatible with TTL levels. This device can be used
as a level converter for interfacing 3.3V to 5.0V , because it has full 5V CMOS
level output swings.
The VHCT244A input and output (when disabled) structures provide
protection when voltages between 0V and 5.5V are applied, regardless of
the supply voltage. These input and output structures help prevent device
destruction caused by supply voltage – input/output voltage mismatch,
battery backup, hot insertion, etc.
• High Speed: tPD = 5.6ns (Typ) at VCC = 5V
• Low Power Dissipation: ICC = 4µA (Max) at TA = 25°C
• TTL–Compatible Inputs: VIL = 0.8V; VIH = 2.0V
• Power Down Protection Provided on Inputs and Outputs
• Balanced Propagation Delays
• Designed for 4.5V to 5.5V Operating Range
• Low Noise: V
OLP
= 1.1V (Max)
• Pin and Function Compatible with Other Standard Logic Families
• Latchup Performance Exceeds 300mA
• ESD Performance: HBM > 2000V; Machine Model > 200V
• Chip Complexity: 112 FETs or 28 Equivalent Gates
LOGIC DIAGRAM
DATA
INPUTS
A1
A2
A3
A4
B1
B2
B3
B4
17
15
13
11
8
6
4
218
16
14
12
9
7
5
3
YB4
YB3
YB2
YB1
YA4
YA3
YA2
YA1
NONINVERTING
OUTPUTS
OUTPUT
ENABLES
OEA
OEB
1
19
PIN ASSIGNMENT
A3
A2
YB4
A1
OEA
GND
YB1
A4
YB2
YB3 5
4
3
2
1
10
9
8
7
6
14
15
16
17
18
19
20
11
12
13
YA2
B4
YA1
OEB
V
CC
B1
YA4
B2
YA3
B3
DW SUFFIX
20–LEAD SOIC PACKAGE
CASE 751D–04
ORDERING INFORMATION
MC74VHCTXXXADW
MC74VHCTXXXADT
MC74VHCTXXXAM
SOIC
TSSOP
SOIC EIAJ
DT SUFFIX
20–LEAD TSSOP PACKAGE
CASE 948E–02
M SUFFIX
20–LEAD SOIC EIAJ PACKAGE
CASE 967–01
OEA, OEB A, B YA, YB
L
L
H
L
H
X
L
H
Z
INPUTS OUTPUTS
FUNCTION TABLE
MC74VHCT244A
MOTOROLA VHC Data – Advanced CMOS Logic
DL203 — Rev 1
2
MAXIMUM RATINGS*
Symbol
Parameter
Value
Unit
V
CC
DC Supply Voltage
– 0.5 to + 7.0
V
V
in
DC Input Voltage
– 0.5 to + 7.0
V
Î
Î
V
out
ОООООООООООО
Î
DC Output Voltage Output in 3–State
High or Low State
ÎÎÎÎ
Î
– 0.5 to + 7.0
– 0.5 to VCC + 0.5
Î
Î
V
I
IK
Input Diode Current
– 20
mA
I
OK
Output Diode Current (V
OUT
< GND; V
OUT
> VCC)
± 20
mA
I
out
DC Output Current, per Pin
± 25
mA
I
CC
DC Supply Current, VCC and GND Pins
± 75
mA
Î
Î
P
D
ОООООООООООО
Î
Power Dissipation in Still Air, SOIC Packages†
TSSOP Package†
ÎÎÎÎ
Î
500
450
Î
Î
mW
Î
Î
T
stg
ОООООООООООО
Î
Storage Temperature
ÎÎÎÎ
Î
– 65 to + 150
Î
Î
_
C
* Absolute maximum continuous ratings are those values beyond which damage to the device
may occur. Exposure to these conditions or conditions beyond those indicated may adversely
affect device reliability . Functional operation under absolute–maximum–rated conditions is not
implied.
†Derating — SOIC Packages: – 7 mW/_C from 65_ to 125_C
TSSOP Package: – 6.1 mW/_C from 65_ to 125_C
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
Min
Max
Unit
V
CC
DC Supply Voltage
4.5
5.5
V
V
in
DC Input Voltage
0
5.5
V
ÎÎ
Î
V
out
ОООООООООООО
Î
DC Output Voltage Output in 3–State
High or Low State
Î
Î
0
0
Î
Î
5.5
V
CC
Î
Î
V
T
A
Operating Temperature
– 40
+ 85
_
C
tr, t
f
Input Rise and Fall Time VCC =5.0V ±0.5V
0
20
ns/V
DC ELECTRICAL CHARACTERISTICS
V
ОООООООО
TA = 25°C
TA = – 40 to 85°C
Symbol
Parameter
Test Conditions
V
CC
V
ÎÎÎ
Min
Typ
ÎÎÎ
Max
Min
Max
Unit
V
IH
Minimum High–Level
Input Voltage
4.5 to
5.5
ÎÎÎ
2.0
ÎÎÎ
2.0
V
ÎÎ
Î
V
IL
ООООО
Î
Maximum Low–Level
Input Voltage
ОООООÎÎÎ
Î
4.5 to
5.5
ÎÎÎ
ÎÎÎÎÎ
Î
ÎÎÎ
ÎÎ
Î
0.8
ÎÎÎÎÎ
Î
0.8
Î
V
V
OH
Minimum High–Level
IOH = – 50µA
4.5
ÎÎÎ
4.4
4.5
ÎÎÎ
4.4
V
Output Voltage
Vin = VIH or V
IL
IOH = – 8mA
4.5
ÎÎÎ
3.94
ÎÎÎ
3.80
ÎÎ
Î
V
OL
ООООО
Î
Maximum Low–Level
ООООО
Î
IOL = 50µA
ÎÎ
Î
4.5
ÎÎÎ
ÎÎÎÎÎ
Î
0.0
ÎÎÎ
ÎÎ
Î
0.1
ÎÎÎÎÎ
Î
0.1
Î
V
ÎÎÎООООО
Î
Output Voltage
Vin = VIH or V
IL
ООООО
Î
IOL = 8mA
ÎÎ
Î
4.5
ÎÎÎ
ÎÎÎÎÎ
Î
ÎÎÎ
ÎÎ
Î
0.36
ÎÎÎÎÎ
Î
0.44
Î
I
in
Maximum Input
Leakage Current
Vin = 5.5 V or GND
0 to 5.5
ÎÎÎ
ÎÎÎ
± 0.1
± 1.0
µA
ÎÎ
Î
I
OZ
ООООО
Î
Maximum 3–State
Leakage Current
ООООО
Î
Vin = VIL or V
IH
V
out
= VCC or GND
ÎÎ
Î
5.5
ÎÎÎ
ÎÎÎÎÎ
Î
ÎÎÎ
ÎÎ
Î
± 0.25
ÎÎÎÎÎ
Î
± 2.5εA
ÎÎ
Î
I
CC
ООООО
Î
Maximum Quiescent
Supply Current
ООООО
Î
Vin = VCC or GND
ÎÎ
Î
5.5
ÎÎÎ
ÎÎÎÎÎ
Î
ÎÎÎ
ÎÎ
Î
4.0
ÎÎÎÎÎ
Î
40.0
Î
µA
This device contains protection
circuitry to guard against damage
due to high static voltages or electric
fields. However, precautions must
be taken to avoid applications of any
voltage higher than maximum rated
voltages to this high–impedance circuit. For proper operation, Vin and
V
out
should be constrained to the
range GND v (Vin or V
out
) v VCC.
Unused inputs must always be
tied to an appropriate logic voltage
level (e.g., either GND or VCC).
Unused outputs must be left open.
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