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參數(shù)資料
| 型號(hào)： | 74ALS244ADB |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 通用總線功能 |
| 英文描述： | Octal buffer 3-State |
| 中文描述： | ALS SERIES, DUAL 4-BIT DRIVER, TRUE OUTPUT, PDSO20 |
| 封裝： | 5.30 MM, PLASTIC, SSOP-20 |
| 文件頁數(shù)： | 5/9頁 |
| 文件大?。?/td> | 110K |
| 代理商： | 74ALS244ADB |
Philips Semiconductors
Product specification
74ALS244A/74ALS244A-1
Octal buffer (3-State)
1991 Feb 08
5
AC WAVEFORMS
For all waveforms, V
M
= 1.3V.
V
M
V
M
V
M
V
M
Yn
Ian, Ibn
t
PLH
t
PHL
SF00231
Waveform 1.
Propagation Delay for Non-inverting Outputs
V
OH
–0.3V
V
M
V
M
V
M
Yn
t
PZH
t
PHZ
SF00233
OEn
0V
Waveform 2.
3-State Output Enable Time to High Level
and Output Disable Time from High Level
V
OL
+0.3V
V
M
V
M
V
M
Yn
t
PZL
t
PLZ
SF00234
OEn
3.5V
Waveform 3.
3-State Output Enable Time to Low Level
and Output Disable Time from Low Level
TEST CIRCUIT AND WAVEFORMS
t
w
90%
V
M
10%
90%
V
M
10%
90%
V
M
10%
90%
V
M
10%
NEGATIVE
PULSE
POSITIVE
PULSE
t
w
AMP (V)
0.3V
0.3V
t
THL (
t
f
f
)
INPUT PULSE REQUIREMENTS
Rep.Rate
t
w
t
TLH
2.0ns
t
THL
2.0ns
1MHz
500ns
Input Pulse Definition
V
CC
Family
74ALS
D.U.T.
PULSE
GENERATOR
R
L
C
L
R
T
V
IN
V
OUT
Test Circuit for 3-State Outputs
SWITCH POSITION
TEST
SWITCH
t
PLZ
, t
PZL
closed
All other
open
DEFINITIONS:
R
L
=
Load resistor;
see AC electrical characteristics for value.
Load capacitance includes jig and probe capacitance;
see AC electrical characteristics for value.
Termination resistance should be equal to Z
OUT
of
pulse generators.
C
L
=
R
T
=
t
THL (
t
f
)
t
TLH (
t
r
)
t
TLH (
t
r
)
AMP (V)
Amplitude
3.5V
1.3V
V
M
SC00072
R
L
7.0V
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 74ALS244AN | Octal buffer 3-State |
| 74ALS244 | OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS |
| 74ALS244 | Octal 3-STATE Bus Driver |
| 74ALS245A-1D | Single 8-bit Bus Transceiver |
| 74ALS251D | 8-input multiplexer 3-State |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 74ALS244AN | 制造商:NXP Semiconductors 功能描述: 制造商:Texas Instruments 功能描述: 制造商:Fairchild Semiconductor Corporation 功能描述:Driver/Buffer Device, Dual, 4-Bit, 20 Pin, Plastic, DIP 制造商:North American Philips Discrete Products Div 功能描述:Driver/Buffer Device, Dual, 4-Bit, 20 Pin, Plastic, DIP 制造商:NXP Semiconductors 功能描述:Driver/Buffer Device, Dual, 4-Bit, 20 Pin, Plastic, DIP |
| 74ALS244B | 制造商:TI 功能描述:74ALS244 T.I. IN S3D8A |
| 74ALS244NTI88 | 制造商:TI 功能描述:74ALS244N |
| 74ALS245 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Octal 3-STATE Bus Transceiver |
| 74ALS245A | 制造商:TI 功能描述:74ALS245 TI S2A7B |
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