HIT HD74LVC2244A Datasheet
HD74LVC2244A
Octal Buffers / Line Drivers with 3–state Outputs
ADE-205-234 (Z)
Preliminary
1st. Edition
December 1998
Description
The HD74LVC2244A has eight line drivers with three state outputs in a 20 pin package. This device is a
noninverting buffer and has two active low enables (1G and 2G). Each enable independently controls four
buffers.
All outputs, which are designed to sink up to 12 mA, include equivalent 26 Ω resistors to reduce overshoot
and undreshoot.
When VCC is between 0 and 1.5 V, the device is in the high impedance state during power up or power
down.
Low voltage and high speed operation is suitable at battery drive product (note type personal computer) and
low power consumption extends the life of a battery for long time operation.
Features
• VCC = 1.65 to 5.5 V
• All inputs VIH (Max) = 5.5 V (@VCC = 0 to 5.5 V)
• All outputs VO (Max) = 5.5 V (@VCC = 0 V or output off state)
• Typical VOL ground bounce < 0.8 V (@VCC = 3.3 V, Ta = 25°C)
• Typical VOH undershoot > 2.0 V (@VCC = 3.3 V, Ta = 25°C)
• High output current ±12 mA (@VCC = 3.0 to 5.5 V)
• All outputs have equivalent 26 Ω series resistors, so no external resistors are required
HD74LVC2244A
Function Table
Inputs Output Y
G A
HXZ
LHH
LLL
H : High level
L : Low level
X : Immaterial
Z : High impedance
Pin Arrangement
V
1G
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
2G
1Y1
2A4
1Y2
2A3
1Y3
2A2
1Y4
2A1
2
HD74LVC2244A
Absolute Maximum Ratings
Item Symbol Ratings Unit Conditions
Supply voltage V
Input voltage V
Output voltage V
Input diode current I
Output diode current I
Output current I
VCC, GND current ICC or I
CC
I
O
IK
OK
O
GND
Storage temperature Tstg –65 to 150 °C
Note: The absolute maximum ratings are values which must not individually be exceeded, and furthermore
no two of which may be realized at the same time.
Recommended Operating Conditions
–0.5 to 7.0 V
–0.5 to 7.0 V
–0.5 to 7.0 V Output “Z” or VCC : OFF
–0.5 to VCC+0.5 Output “H” or “L”
–50 mA VI < 0
–50 mA VO < 0
±50 mA
±100 mA
Item Symbol Ratings Unit Conditions
Supply voltage V
CC
1.65 to 5.5 V At operation
1.5 to 5.5 Data retention only
Input voltage V
Output voltage V
Output current I
I
O
OH
0 to 5.5 V
0 to 5.5 V Output “Z” or VCC : OFF
0 to V
CC
Output “H” or “L”
–2 mA VCC = 1.65 V
–4 VCC = 2.3 V
–8 VCC = 2.7 V
–12 VCC = 3.0 to 5.5 V
I
OL
2V
4V
8V
= 1.65 V
CC
= 2.3 V
CC
= 2.7 V
CC
12 VCC = 3.0 to 5.5 V
Input rise / fall time tr, t
f
0 to 6 ns / V
Operating temperature Ta –40 to +85 °C
3
HD74LVC2244A
Logic Diagram
1
1G
2
1A1
416
1A2
614
1A3
812
1A4
18
1Y1
1Y2
1Y3
1Y4
19
2G
11
2A1
13 7
2A2
15 5
2A3
17 3
2A4
9
2Y1
2Y2
2Y3
2Y4
4
Electrical Characteristics (Ta = –40 to 85°C)
HD74LVC2244A
Item Symbol V
Input voltage V
IH
(V) Min Typ Max Unit Test Conditions
CC
1.65 to 1.95 VCC×0.65 —— V
2.3 to 2.7 1.7 — —
2.7 to 3.6 2.0 — —
4.5 to 5.5 VCC×0.7 — —
V
1.65 to 1.95 ——VCC×0.35
IL
2.3 to 2.7 — — 0.7
2.7 to 3.6 — — 0.8
4.5 to 5.5 — — VCC×0.3
Output voltage V
1.65 to 5.5 VCC–0.2 — — V IOH = –100 µA
OH
1.65 1.2 — — IOH = –2 mA
2.3 1.7 — — IOH = –4 mA
2.7 2.2 — —
3.0 2.4 — — IOH = –6 mA
2.7 2.0 — — IOH = –8 mA
3.0 2.0 — — IOH = –12 mA
4.5 3.6 — —
V
1.65 to 5.5 — — 0.2 IOL = 100 µA
OL
1.65 — — 0.45 IOL = 2 mA
2.3 — — 0.7 IOL = 4 mA
2.7 — — 0.4
3.0 — — 0.55 IOL = 6 mA
2.7 — — 0.6 IOL = 8 mA
3.0 — — 0.8 IOL = 12 mA
4.5 — — 0.8
Input current I
Off state output current I
Output leak current I
Quiescent supply I
IN
OZ
OFF
CC
0 to 5.5 — — ±5 µAVIN = 0 to 5.5 V
1.65 to 5.5 — — ±5 µAV
= 0 to 5.5 V
OUT
0——±5 µAVIN or VO = 5.5 V
1.65 to 3.6 — — 10 µAVIN = 3.6 to 5.5 V *1, IO = 0
current 1.65 to 5.5 — — 10 VIN = VCC or GND
∆I
2.7 to 3.6 — — 500 VIN = one input at (VCC–
CC
0.6)V,
other inputs at V
Input capacitance C
Output capacitance C
3.3 — TBD — pF VIN = VCC or GND
IN
3.3 — TBD — pF V
O
= VCC or GND
OUT
Note: 1. This applies in the disabled state only.
or GND
CC
5
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