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參數(shù)資料
| 型號(hào)： | FB2031BB |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 通用總線功能 |
| 英文描述： | 9-bit latched/registered/pass-thru Futurebus transceiver |
| 中文描述： | FB SERIES, 9-BIT REGISTERED TRANSCEIVER, INVERTED OUTPUT, PQFP52 |
| 封裝： | PLASTIC, QFP-52 |
| 文件頁數(shù)： | 4/18頁 |
| 文件大?。?/td> | 187K |
| 代理商： | FB2031BB |
Philips Semiconductors
Product specification
FB2031
9-bit latched/registered/pass-thru Futurebus+ transceiver
1995 May 25
4
FUNCTION TABLE
MODE
INPUTS
OEA
L
L
L
L
L
L
OUTPUTS
An
input
input
input
input
input
input
An
L
H
L
H
l
h
Bn*
—
—
—
—
—
—
OEB0
H
H
H
H
H
H
OEB1
L
L
L
L
L
L
LCAB
X
X
L
L
↑
↑
LCBA
X
X
X
X
X
X
SEL0
H
H
L
L
L
L
SEL1
L
L
L
L
L
L
Bn
H**
L
H**
L
H**
L
An to Bn thru mode
An to Bn transparent latch
An to Bn latch and read
Bn outputs latched and read
(preconditioned latch)
X
—
H
L
X
H
X
L
L
X
latched
data
H**
L
input
input
input
input
input
input
input
input
input
input
An to Bn register
l
—
—
L
H
L
H
L
H
l
h
l
h
H
H
L
L
L
L
H
H
H
H
H
H
H
H
H
H
↑
↑
X
X
X
X
X
X
X
X
X
X
X
X
X
X
L
L
L
L
↑
↑
↑
↑
X
X
H
H
L
L
H
H
L
L
H
H
H
H
L
L
L
L
H
H
L
L
H
H
input
input
H
L
H
L
H
L
H
L
H
L
latched
data
latched
data
H
L
X
X
Z
h
—
—
—
—
—
—
—
—
—
—
Bn to An thru mode
Disable
Disable
Disable
Disable
Disable
Disable
Disable
Disable
Disable
Disable
Bn to An transparent latch
Bn to An latch and read
An outputs latched and read
(preconditioned latch)
—
X
X
X
H
X
H
L
L
X
—
X
X
X
H
X
H
H
H
X
Bn to An register
—
—
X
X
X
l
Disable
Disable
L
X
X
H
H
X
X
L
X
X
X
X
X
↑
↑
X
X
X
L
L
X
X
X
H
H
X
X
X
input
input
H**
H**
X
h
X
X
X
Disable Bn outputs
X
H
X
Disable An outputs
FUNCTION SELECT TABLE
MODE SELECTED
Thru mode
Register mode (An to Bn)
Latch mode (An to Bn)
Register mode (Bn to An)
SEL0
H
X
L
L
L
H
SEL1
L
H
L
H
L
H
Latch mode (Bn to An)
NOTES:
H
L
l
prior to the Low-to-High LCXX transition
h
=
High voltage level one set-up time
prior to the Low-to-High LCXX transition
=
=
=
High voltage level
Low voltage level
Low voltage level one set-up time
X
Z
—
↑
H** =
=
=
=
=
Don’t care
High-impedance (OFF) state
Input not externally driven
Low-to-High transition
Goes to level of pull-up voltage
Bn* =
ensure B inputs do not float. If they do, they
are equal to Low state.
Disable = OEB0 is Low or OEB1 is High.
Precaution should be taken to
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