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PDF HD74LV125A Data sheet ( Hoja de datos )
| Número de pieza | HD74LV125A | |
| Descripción | Quad. Bus Buffer Gates with 3-state Outputs | |
| Fabricantes | Hitachi Semiconductor | |
| Logotipo |  |
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HD74LV125A
Quad. Bus Buffer Gates with 3-state Outputs
ADE-205-245 (Z)
1st Edition
March 1999
Description
The HD74LV125A features independent line drivers with three state outputs. Each output is disabled when
the associated output enable (OE) input is high. To ensure the high impedance state during power up or
power down, OE should be connected to VCC through a pull-down resistor; the minimum value of the
resistor is determined by the current souring capability of the driver. Low-voltage and high-speed operation
is suitable for the battery-powered 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
L
L
H
Note:
H: High level
L: Low level
X: Immaterial
Z: High impedance
A
H
L
X
Output Y
H
L
Z
1 page  
Logic Diagram
1OE 1
2
1A
2OE 4
2A 5
3OE 10
9
3A
4OE 13
12
4A
HD74LV125A
3
1Y
6 2Y
8
3Y
11
4Y
5
5 Page 
• Waveform-1
Input A
tr
10 %
90 %
50 %VCC
tPLH
tf
90 %
50 %VCC
10 %
tPHL
Output Y
50 %VCC
50 %VCC
HD74LV125A
VCC
GND
VOH
VOL
• Waveform-2
tf
90 %
Input OE 50 %VCC
10 %
tZL
Waveform - A
50 %VCC
tZH
Waveform - B
50 %VCC
tr
10 %
90 %
50 %VCC
tLZ
VOL + 0.3 V
tHZ
VOH – 0.3 V
VCC
GND
VCC
VOL
VOH
GND
Notes: 1. tr ≤ 3 ns, tf ≤ 3 ns
2. Input waveform: PRR ≤ 1 MHz, duty cycle 50%
3. Waveform-A is for an output with internal conditions such that the output is low except when
disabled by the output control.
4. Waveform-B is for an output with internal conditions such that the output is high except when
disabled by the output control.
11
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet HD74LV125A.PDF ] | |
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