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參數(shù)資料
| 型號： | 74F244B |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Octal buffers 3-State |
| 中文描述： | 八路緩沖器三態(tài) |
| 文件頁數(shù)： | 7/12頁 |
| 文件大小： | 94K |
| 代理商： | 74F244B |
Philips Semiconductors
Product specification
74F244/74F244B
Octal buffers (3-State)
1994 Dec 5
7
AC WAVEFORMS
For all waveforms, V
M
= 1.5V.
V
M
V
M
V
M
V
M
Yn
Ian, Ibn
t
PLH
t
PHL
SF00231
Waveform 1. Propagation Delay for data to 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
M
V
M
Yn, Yn
t
sk
(0)
SF00232
Yn, Yn
Waveform 3. Output skew
V
OL
+0.3V
V
M
V
M
V
M
Yn
t
PZL
t
PLZ
SF00234
OEn
3.5V
Waveform 4. 3-State output enable time to low level
and output disable time from low level
TEST CIRCUIT AND WAVEFORMS
SWITCH POSITION
TEST
SWITCH
closed
open
All other
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)
0V
0V
t
THL (
t
f
)
INPUT PULSE REQUIREMENTS
rep. rate
t
w
t
TLH
t
THL
2.5ns
1MHz
500ns 2.5ns
Input pulse definition
V
CC
family
74F
D.U.T.
PULSE
GENERATOR
R
L
C
L
R
T
V
IN
V
OUT
Test circuit for 3-State outputs
DEFINITIONS:
R
L
=
Load resistor; see AC electrical characteristics for
value.
C
L
=
Load capacitance includes jig and probe
capacitance; see AC electrical characteristics for
value
R
T
=
Termination resistance should be equal to Z
OUT
of
pulse generators.
t
THL (
t
f
)
t
TLH (
t
r
)
t
TLH (
t
r
)
AMP (V)
amplitude
3.0V
1.5V
V
M
R
L
7.0V
t
PLZ
, t
PZL
SF000235
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 74F244MSA | Octal Buffers/Line Drivers with TRI-STATE Outputs |
| 74F244PC | Octal Buffers/Line Drivers with TRI-STATE Outputs |
| 74F244SC | Octal Buffers/Line Drivers with TRI-STATE Outputs |
| 74F244SJ | Octal Buffers/Line Drivers with TRI-STATE Outputs |
| 74F244PC | Octal Buffers/Line Drivers with 3-STATE Outputs |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 74F244D | 制造商:NXP Semiconductors 功能描述:OCTAL BUFFER 3-STATE |
| 74F244D FSC88 | 制造商:Fairchild Semiconductor 功能描述:74F244D |
| 74F244D SIG9118 | 制造商:SIG 功能描述:74F244D SIG S1I2B |
| 74F244D TI91/92 | 制造商:TI 功能描述:74F244D TI S1I2B |
| 74F244DB | 制造商:NXP Semiconductors 功能描述:OCTAL BUFFER 3-STATE |
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