HIT HD74LV244A Datasheet
HD74LV244A
Octal Buffers / Drivers with 3-state Outputs
ADE-205-246 (Z)
1st Edition
March 1999
Description
The HD74LV244A has eight line drivers with three-state outputs in a 20-pin package. Four non-inverters
are included in one circuit. Each circuit can be independently controlled by the enable signal 1OE or 2OE,
which enables outputs when receiving a low-level signal. Low-voltage operation is suitable for batterypowered products (e.g., notebook computers), and the low-power consumption extends the battery life.
Features
• VCC = 2.0 V to 5.5 V operation
• All inputs VIH (Max.) = 5.5 V (@VCC = 0 V to 5.5 V)
• All outputs VO (Max.) = 5.5 V (@VCC = 0 V)
• Typical VOL ground bounce < 0.8 V (@VCC = 3.3 V, Ta = 25°C)
• Typical VOH undershoot > 2.3 V (@VCC = 3.3 V, Ta = 25°C)
• Output current ±8 mA (@VCC = 3.0 V to 3.6 V), ±16 mA (@VCC = 4.5 V to 5.5 V)
Function Table
Inputs
OE A Output Y
LHH
LLL
HXZ
Note: H: High level
L: Low level
X: Immaterial
Z: High impedance
HD74LV244A
Pin Arrangement
1OE
V
1
20
CC
1A1
2Y4
1A2
2Y3
1A3
2Y2
1A4
2Y1
GND
10
2
3
4
5
6
7
8
9
(Top view)
19
18
17
16
15
14
13
12
11
2OE
1Y1
2A4
1Y2
2A3
1Y3
2A2
1Y4
2A1
2
HD74LV244A
Absolute Maximum Ratings
Item Symbol Ratings Unit Conditions
Supply voltage range V
Input voltage range*
Output voltage range*
1
1, *2
Input clamp current I
Output clamp current I
Continuous output current I
Continuous current through
V
or GND
CC
Maximum power dissipation
at Ta = 25°C (in still air)*
3
CC
V
I
V
O
IK
OK
O
or I
I
CC
GND
P
T
Storage temperature Tstg –65 to 150 °C
Notes: The absolute maximum ratings are values which must not be individually be exceeded, and
furthermore, no two of which may be realized at the same time.
1. The input and output voltage ratings may be exceeded even if the input and output clamp-current
ratings are observed.
2. This value is limited to 5.5 V maximum.
3. The data above are measured by ∆V
mm) with 10% of wiring density.
–0.5 to 7.0 V
–0.5 to 7.0 V
–0.5 to VCC + 0.5 V Output: H or L
–0.5 to 7.0 VCC: OFF or Output: Z
–20 mA VI < 0
±50 mA VO < 0 or VO > V
±35 mA VO = 0 to V
CC
±70 mA
835 mW SOP
757 TSSOP
method mounting on glass epoxy board (40 × 40 × 1.6
BE
CC
3
HD74LV244A
Recommended Operating Conditions
Item Symbol Min Max Unit Conditions
Supply voltage range V
Input voltage range V
Output voltage range V
Output current I
CC
I
O
OH
I
OL
Input transition rise or fall rate ∆t /∆v 0 200 ns/V VCC = 2.3 to 2.7 V
Operating free-air temperature Ta –40 85 °C
Note: Unused or floating inputs must be held high or low.
2.0 5.5 V
0 5.5 V
0VCCV H or L
0 5.5 High impedance state
— –50 µAV
—–2 mAV
—–8 V
= 2.0 V
CC
= 2.3 to 2.7 V
CC
= 3.0 to 3.6 V
CC
— –16 VCC = 4.5 to 5.5 V
—50 µAV
= 2.0 V
CC
— 2 mA VCC = 2.3 to 2.7 V
—8 V
—16 V
= 3.0 to 3.6 V
CC
= 4.5 to 5.5 V
CC
0 100 VCC = 3.0 to 3.6 V
020 V
= 4.5 to 5.5 V
CC
4
Logic Diagram
HD74LV244A
1OE
1A1
1A2
1A3
1A4
1
2
4
6
8
18
16
14
12
1Y1
1Y2
1Y3
1Y4
2OE
2A1
2A2
2A3
2A4
19
11
13
15
17
9
2Y1
7
2Y2
5
2Y3
3
2Y4
5
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