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HD74LVC244A の電気的特性と機能

HD74LVC244AのメーカーはHitachi Semiconductorです、この部品の機能は「Octal Buffers / Line Drivers with 3-state Outputs」です。


製品の詳細 ( Datasheet PDF )

部品番号 HD74LVC244A
部品説明 Octal Buffers / Line Drivers with 3-state Outputs
メーカ Hitachi Semiconductor
ロゴ Hitachi Semiconductor ロゴ 




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HD74LVC244A Datasheet, HD74LVC244A PDF,ピン配置, 機能
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HD74LVC244A
Octal Buffers / Line Drivers with 3-state Outputs
ADE-205-110B(Z)
3rd Edition
December 1996
Description
The HD74LVC244A has eight line drivers with three state outputs in a 20 pin package. This device is a
non 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
H
L

1 Page





HD74LVC244A pdf, ピン配列
HD74LVC244A
Recommended Operating Conditions
Item
Symbol
Ratings
Unit
Supply voltage
VCC 1.5 to 5.5
2.0 to 5.5
V
V
Input / output voltage
VI
VO
0 to 5.5
0 to VCC
0 to 5.5
V
V
V
Operating temperature Ta
–40 to 85
°C
Output current
IOH –12
–24*2
mA
mA
IOL 12
24*2
mA
mA
Input rise / fall time *1
tr, tf
10
ns/V
Notes: 1. This item guarantees maximum limit when one input switches.
Waveform : Refer to test circuit of switching characteristics.
2. duty cycle 50%
Conditions
Data retention
At operation
G, A
Output "H" or "L"
Output "Z" or VCC:OFF
VCC = 2.7 V
VCC = 3.0 V to 5.5 V
VCC = 2.7 V
VCC = 3.0 V to 5.5 V
3


3Pages


HD74LVC244A 電子部品, 半導体
HD74LVC244A
Test Circuit
VCC
VCC
Input
Pulse generator
Zout = 50
1G, 2G
1Y1 to 2Y4
1A1 to 2A4
Output
CL =
50 pF
500 S1
450
50 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
Waveforms – 1
Input A
Output Y
10 %
tr
90 %
Vref
tPLH
Vref
tf
90 %
Vref
10 %
tPHL
Vref
Notes:
1. tr = 2.5 ns, tf = 2.5 ns
2. Input waveform : PRR = 10 MHz, duty cycle 50%
VIH
GND
VOH
VOL
6

6 Page



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共有リンク

Link :


部品番号部品説明メーカ
HD74LVC244

Octal Buffers / Line Drivers with 3-state Outputs

Hitachi Semiconductor
Hitachi Semiconductor
HD74LVC244A

Octal Buffers / Line Drivers with 3-state Outputs

Hitachi Semiconductor
Hitachi Semiconductor
HD74LVC244A

Octal Buffers / Line Drivers

Hitachi Semiconductor
Hitachi Semiconductor


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