Hitachi HD74AC244 Octal buffer/line driver with 3-state output Datasheet

HD74AC244/HD74ACT244
Octal Buffer/Line Driver with 3-State Output
Description
The HD74AC244/HD74ACT244 is an octal buffer and line driver designed to be employed as a memory
address driver, clock driver and bus-oriented transmitter/receive which provides improved PC board
density.
Features
• 3-State Outputs Drive Bus Lines or Buffer Memory Address Registers
• Outputs Source/Sink 24 mA
• HD74ACT244 has TTL-Compatible Inputs
Pin Arrangement
OE1 1
20 VCC
2
19 OE2
3
18
4
17
5
16
6
15
7
14
8
13
9
12
GND 10
11
(Top view)
HD74AC244/HD74ACT244
Truth Tables
Inputs
OE1
D
Outputs (Pins 12, 14, 16, 18)
L
L
L
L
H
H
H
X
Z
OE2
D
Outputs (Pins 3, 5, 7, 9)
L
L
L
L
H
H
H
X
Z
Inputs
H
L
X
Z
:
:
:
:
High Voltage Level
Low Voltage Level
Immaterial
High Impedance
DC Characteristics (unless otherwise specified)
Item
Symbol
Max
Unit
Condition
Maximum quiescent supply current
I CC
80
µA
VIN = VCC or ground, VCC = 5.5 V,
Ta = Worst case
Maximum quiescent supply current
I CC
8.0
µA
VIN = VCC or ground, VCC = 5.5 V,
Ta = 25°C
Maximum additional ICC/input
(HD74ACT244)
I CCT
1.5
mA
VIN = VCC – 2.1 V, VCC = 5.5 V,
Ta = Worst case
2
HD74AC244/HD74ACT244
AC Characteristics: HD74AC244
Ta = +25°C
CL = 50 pF
Ta = –40°C to +85°C
CL = 50 pF
Item
Symbol
VCC (V)*1
Min
Typ
Max
Min
Max
Unit
Propagation delay
t PLH
3.3
1.0
6.5
9.0
1.0
10.0
ns
5.0
1.0
5.0
7.0
1.0
7.5
3.3
1.0
6.5
9.0
1.0
10.0
5.0
1.0
5.0
7.0
1.0
7.5
3.3
1.0
6.0
10.5
1.0
11.0
5.0
1.0
5.0
7.0
1.0
8.0
3.3
1.0
7.5
10.0
1.0
11.0
5.0
1.0
5.5
8.0
1.0
8.5
3.3
1.0
7.0
10.0
1.0
10.5
5.0
1.0
6.5
9.0
1.0
9.5
3.3
1.0
7.5
10.5
1.0
11.5
5.0
1.0
6.5
9.0
1.0
9.5
Data to output
Propagation delay
t PHL
Data to output
Output enable time
Output enable time
Output disable time
Output disable time
Note:
t PZH
t PZL
t PHZ
t PLZ
ns
ns
ns
ns
ns
1. Voltage Range 3.3 is 3.3 V ± 0.3 V
Voltage Range 5.0 is 5.0 V ± 0.5 V
AC Characteristics: HD74ACT244
Ta = +25°C
CL = 50 pF
Ta = –40°C to +85°C
CL = 50 pF
Item
Symbol
VCC (V)*1
Min
Typ
Max
Min
Max
Unit
Propagation delay
Data to output
t PLH
5.0
1.0
6.5
9.0
1.0
10.0
ns
Propagation delay
Data to output
t PHL
5.0
1.0
7.0
9.0
1.0
10.0
ns
Output enable time
t PZH
5.0
1.0
6.0
8.5
1.0
9.5
ns
Output enable time
t PZL
5.0
1.0
7.0
9.5
1.0
10.5
ns
Output disable time
t PHZ
5.0
1.0
7.0
9.5
1.0
10.5
ns
Output disable time
t PLZ
5.0
1.0
7.5
10.0
1.0
10.5
ns
Note:
1. Voltage Range 5.0 is 5.0 V ± 0.5 V
3
HD74AC244/HD74ACT244
Capacitance
Item
Symbol
Typ
Unit
Condition
Input capacitance
CIN
4.5
pF
VCC = 5.5 V
Power dissipation capacitance
CPD
45.0
pF
VCC = 5.0 V
4
Unit: mm
24.50
25.40 Max
6.30
11
1
7.00 Max
20
10
1.30
2.54 ± 0.25
0.48 ± 0.10
0.51 Min
1.27 Max
2.54 Min 5.08 Max
0.89
7.62
+ 0.11
0.25 – 0.05
0° – 15°
Hitachi Code
JEDEC
EIAJ
Weight (reference value)
DP-20N
—
Conforms
1.26 g
Unit: mm
12.6
13 Max
11
1
10
1.27
*0.42 ± 0.08
0.40 ± 0.06
0.10 ± 0.10
0.80 Max
*0.22 ± 0.05
0.20 ± 0.04
2.20 Max
5.5
20
0.20
7.80 +– 0.30
1.15
0° – 8°
0.70 ± 0.20
0.15
0.12 M
*Dimension including the plating thickness
Base material dimension
Hitachi Code
JEDEC
EIAJ
Weight (reference value)
FP-20DA
—
Conforms
0.31 g
Unit: mm
12.8
13.2 Max
11
1
10
0.20 ± 0.10
0.935 Max
1.27
*0.42 ± 0.08
0.40 ± 0.06
*0.27 ± 0.05
0.25 ± 0.04
2.65 Max
7.50
20
0.25
10.40 +– 0.40
1.45
0° – 8°
0.57
0.70 +– 0.30
0.15
0.12 M
*Dimension including the plating thickness
Base material dimension
Hitachi Code
JEDEC
EIAJ
Weight (reference value)
FP-20DB
Conforms
—
0.52 g
Unit: mm
6.50
6.80 Max
11
1
10
4.40
20
0.65
*0.22+0.08
–0.07
0.20 ± 0.06
1.0
0.13 M
6.40 ± 0.20
*Dimension including the plating thickness
Base material dimension
0.07 +0.03
–0.04
0.10
*0.17 ± 0.05
0.15 ± 0.04
1.10 Max
0.65 Max
0° – 8°
0.50 ± 0.10
Hitachi Code
JEDEC
EIAJ
Weight (reference value)
TTP-20DA
—
—
0.07 g
Cautions
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received the latest product standards or specifications before final design, purchase or use.
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contact Hitachi’s sales office before using the product in an application that demands especially high
quality and reliability or where its failure or malfunction may directly threaten human life or cause risk
of bodily injury, such as aerospace, aeronautics, nuclear power, combustion control, transportation,
traffic, safety equipment or medical equipment for life support.
4. Design your application so that the product is used within the ranges guaranteed by Hitachi particularly
for maximum rating, operating supply voltage range, heat radiation characteristics, installation
conditions and other characteristics. Hitachi bears no responsibility for failure or damage when used
beyond the guaranteed ranges. Even within the guaranteed ranges, consider normally foreseeable
failure rates or failure modes in semiconductor devices and employ systemic measures such as failsafes, so that the equipment incorporating Hitachi product does not cause bodily injury, fire or other
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5. This product is not designed to be radiation resistant.
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