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54ABT244E-QML の電気的特性と機能

54ABT244E-QMLのメーカーはNational Semiconductorです、この部品の機能は「Octal Buffer/Line Driver with TRI-STATE Outputs」です。


製品の詳細 ( Datasheet PDF )

部品番号 54ABT244E-QML
部品説明 Octal Buffer/Line Driver with TRI-STATE Outputs
メーカ National Semiconductor
ロゴ National Semiconductor ロゴ 




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54ABT244E-QML Datasheet, 54ABT244E-QML PDF,ピン配置, 機能
July 1998
54ABT244
Octal Buffer/Line Driver with TRI-STATE® Outputs
General Description
The ’ABT244 is an octal buffer and line driver with
TRI-STATE outputs designed to be employed as a memory
and address driver, clock driver, or bus-oriented transmitter/
receiver.
Features
n Non-inverting buffers
n Output sink capability of 48 mA, source capability of
24 mA
n Output switching specified for both 50 pF and 250 pF
loads
n Guaranteed simultaneous switching, noise level and
dynamic threshold performance
n Guaranteed latchup protection
n High impedance glitch free bus loading during entire
power up and power down cycle
n Nondestructive hot insertion capability
n Disable time less than enable time to avoid bus
contention
n Standard Microcircuit Drawing (SMD) 5962-9214701
Ordering Code
Military
54ABT244J-QML
54ABT244W-QML
54ABT244E-QML
Package
Number
J20A
W20A
E20A
Connection Diagrams
Package Description
20-Lead Ceramic Dual-In-Line
20-Lead Cerpack
20-Lead Ceramic Leadless Chip Carrier, Type C
Pin Assignment for
DIP and Flatpak
Pin Assignment for LCC
DS100203-1
Pin
Names
OE1, OE2
I0– I7
O0– O7
Description
Output Enable Input
(Active Low)
Inputs
Outputs
TRI-STATE® is a registered trademark of National Semiconductor Corporation.
© 1998 National Semiconductor Corporation DS100203
DS100203-2
Truth Table
OE1
H
I0–3 O0–3
XZ
L HH
L LL
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
OE2
H
L
L
I4–7 O4–7
XZ
HH
LL
www.national.com

1 Page





54ABT244E-QML pdf, ピン配列
AC Electrical Characteristics
Symbol
Parameter
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
Propagation Delay
Data to Outputs
Output Enable
Time
Output Disable
Time
54ABT
TA = −55˚C to +125˚C
VCC = 4.5V–5.5V
CL = 50 pF
Min Max
1.0 5.3
1.0 5.0
0.8 6.5
1.2 7.9
1.2 7.6
1.0 7.9
Capacitance
Symbol
Parameter
Typ
CIN Input Capacitance
COUT (Note 5)
Output Capacitance
Note 5: COUT is measured at frequency f = 1 MHz, per MIL-STD-883B, Method 3012.
5.0
9.0
Units
ns
ns
ns
Fig.
No.
Figure 5
Figure 4
Figure 4
Units
pF
pF
Conditions
TA = 25˚C
VCC = 0V
VCC = 5.0V
tPLH vs Temperature (TA)
CL = 50 pF, 1 Output Switching
tPHL vs Temperature (TA)
CL = 50 pF, 1 Output Switching
DS100203-11
Dashed lines represent design characteristics; for specified guarantees refer to AC Characteristics Table.
DS100203-12
3 www.national.com


3Pages


54ABT244E-QML 電子部品, 半導体
Capacitance (Continued)
tPZL vs Load Capacitance
8 Outputs Switching
TA = 25˚C
tPZH vs Load Capacitance
8 Outputs Switching
TA = 25˚C
DS100203-25
tPLH and tPHL vs Number
Outputs Switching VCC = 5.0V,
TA = 25˚C, CL = 50 pF
DS100203-26
ICC vs Frequency,
Average, TA = 25˚C,
All Outputs Unloaded/Unterminated
DS100203-27
Dashed lines represent design characteristics; for specified guarantees refer to AC Characteristics Table.
DS100203-28
www.national.com
6

6 Page



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共有リンク

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部品番号部品説明メーカ
54ABT244E-QML

Octal Buffer/Line Driver with TRI-STATE Outputs

National Semiconductor
National Semiconductor


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