HITACHI HD74LVC125A User Manual
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Quad. Bus Buffer Gates with 3-state Outputs
Description
The HD74LVC125A has four bus buffer gates in a 14 pin package. The device require the three state
control input C to be taken high to put the output into the high impedance condition, whereas the device
requires the control input to be low to put the output into high impedance. Low voltage and high speed
operation is suitable at the battery drive product (note type personal computer) and low power consumption
extends the life of a battery for long time operation.
HD74LVC125A
ADE-205-108B(Z)
3rd Edition
December 1996
Features
• VCC = 2.0 V to 5.5 V
• All inputs VIH (Max.) = 5.5 V (@VCC = 0 V to 5.5 V)
• All outputs V
• 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 ±24 mA (@VCC = 3.0 V to 5.5 V)
(Max.) = 5.5 V (@V
OUT
= 0 V or output off state)
CC
Function Table
Inputs
C A Outputs Y
HX Z
LL L
LHH
H : High level
L : Low level
X : Immaterial
Z : High impedance
HD74LVC125A
Pin Arrangement
1C
1A
1Y
2C
2A
2Y
GND
1
2
3
4
5
6
7
14
13
12
11
10
V
CC
4C
4A
4Y
3C
3A
9
8
3Y
(Top view)
Absolute Maximum Ratings
Item Symbol Ratings Unit Conditions
Supply voltage V
Input diode current I
Input voltage V
Output diode current I
Output voltage V
Output current I
VCC, GND current / pin I
IK
OK
O
CC
CC
I
O
or I
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.
–0.5 to 6.0 V
–50 mA VI = –0.5 V
–0.5 to 6.0 V
–50 mA VO = –0.5 V
50 mA VO = V
+0.5 V
CC
–0.5 to VCC +0.5 V Output "H" or "L"
–0.5 to 6.0 V Output "Z" or VCC:OFF
±50 mA
100 mA
2
HD74LVC125A
Recommended Operating Conditions
Item Symbol Ratings Unit Conditions
Supply voltage V
Input / output voltage V
CC
I
V
O
Operating temperature Ta –40 to 85 °C
Output current I
Input rise / fall time
*1
OH
I
OL
tr, t
f
Notes: 1. This item guarantees maximum limit when one input switches.
Waveform : Refer to test circuit of switching characteristics.
2. duty cycle ≤ 50%
1.5 to 5.5 V Data hold
2.0 to 5.5 V At operation
0 to 5.5 V C, A
0 to V
CC
V Output "H" or "L"
0 to 5.5 V Output "Z" or VCC:OFF
–12 mA VCC = 2.7 V
*2
–24
mA VCC = 3.0 V to 5.5 V
12 mA VCC = 2.7 V
*2
24
mA VCC = 3.0 V to 5.5 V
10 ns/V
3
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