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PDF HD74LVC240A Data sheet ( Hoja de datos )
| Número de pieza | HD74LVC240A | |
| Descripción | Octal Buffers / Line Drivers | |
| Fabricantes | Hitachi Semiconductor | |
| Logotipo |  |
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HD74LVC240A
Octal Buffers / Line Drivers with 3-state Outputs
ADE-205-109B(Z)
3rd Edition
December 1996
Description
The HD74LVC240A has eight inverter drivers with three state outputs in a 20 pin package. This device is
a inverting buffer and has two active low enables (1G and 2G). Each enable independently controls four
buffers. 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.
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 VOUT (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 ±24 mA (@VCC = 3.0 V to 5.5 V)
Function Table
Inputs
GA
HX
LH
LL
H : High level
L : Low level
X : Immaterial
Z : High impedance
Output Y
Z
L
H
1 page  
HD74LVC240A
Switching Characteristics
Ta = –40 to 85°C
Item
Propagation delay time
Symbol VCC (V)
tPLH 2.7
tPHL 3.3±0.3
5.0±0.5
Min Typ Max Unit
— — 7.5 ns
1.5 — 6.5 ns
— — 5.0 ns
Output enable time
tZH 2.7
— — 9.0 ns
tZL 3.3±0.3 1.5 — 8.0 ns
5.0±0.5 — — 6.5 ns
Output disable time
t HZ
t LZ
Between outut pins skew *1 tOSLH
t OSHL
2.7
3.3±0.3
5.0±0.5
2.7
3.3±0.3
5.0±0.5
——
1.5 —
——
——
——
——
8.0 ns
7.0 ns
6.0 ns
— ns
1.0 ns
1.0 ns
Input capacitance
CIN 2.7
— 3.0 —
Output capacitance
CO 2.7
— 15.0 —
Note: 1. This parameter is characterized but not tested.
tosLH = | tPLHm - tPLHn|, tosHL = | tPHLm - tPHLn|
pF
pF
From (Input) To (Output)
AY
GY
GY
Test Circuit
VCC
VCC
Input
Pulse generator
Zout = 50 Ω
1G, 2G
Output
1Y1 to 2Y4
1A1 to 2A4
CL =
50 pF
500 Ω S1
450 Ω
50 Ω Scope
OPEN
*1 See under table
GND
Note:
1. CL includes probe and jig capacitance.
Symbol
tPLH / t PHL
tZH/ t HZ
tZL / t LZ
S1
Vcc=2.7V,
3.3±0.3V
Vcc=5.0±0.5V
OPEN OPEN
GND
GND
6 V 2×Vcc
5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet HD74LVC240A.PDF ] | |
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