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product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent-Marking.pdf.
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products are not designed, intended, or authorized
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MC74VHC244
Octal Bus Buffer
The MC74VHC244 is an advanced high speed CMOS octal bus
buffer fabricated with silicon gate CMOS technology.
The MC74VHC244 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 internal circuit is composed of three stages, including a buffer
output which provides high noise immunity and stable output. The
inputs tolerate voltages up to 7 V, allowing the interface of 5 V systems
to 3 V systems.
•
High Speed: t
PD
= 3.9 ns (Typ) at V
CC
= 5 V
•
Low Power Dissipation: I
CC
= 4
mA
(Max) at T
A
= 25°C
•
High Noise Immunity: V
NIH
= V
NIL
= 28% V
CC
•
Power Down Protection Provided on Inputs
•
Balanced Propagation Delays
•
Designed for 2 V to 5.5 V Operating Range
•
Low Noise: V
OLP
= 0.9 V (Max)
•
Pin and Function Compatible with Other Standard Logic Families
•
Latchup Performance Exceeds 300 mA
•
ESD Performance: Human Body Model > 2000 V
Machine Model > 200 V
•
Chip Complexity: 136 FETs
•
NLV Prefix for Automotive and Other Applications Requiring
Unique Site and Control Change Requirements; AEC−Q100
Qualified and PPAP Capable
•
These Devices are Pb−Free and are RoHS Compliant
2
4
6
8
11
13
15
17
18
16
14
12
9
7
5
3
http://onsemi.com
MARKING DIAGRAMS
20
20
1
SOIC−20
DW SUFFIX
CASE 751D
1
20
TSSOP−20
DT SUFFIX
CASE 948E
1
VHC
244
ALYWG
G
VHC244
AWLYYWWG
20
1
VHC244 = Specific Device Code
A
= Assembly Location
WL, L
= Wafer Lot
Y
= Year
WW, W
= Work Week
G or
G
= Pb−Free Package
(Note: Microdot may be in either location)
PIN ASSIGNMENT
A1
A2
A3
A4
DATA
INPUTS
B1
B2
B3
B4
YA1
YA2
YA3
YA4
YB1
YB2
YB3
YB4
NONINVERTING
OUTPUTS
OEA
A1
YB4
A2
YB3
A3
YB2
A4
YB1
GND
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
V
CC
OEB
YA1
B4
YA2
B3
YA3
B2
YA4
B1
ORDERING INFORMATION
See detailed ordering and shipping information in the
Ordering Information Table on page 2 of this data sheet.
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