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參數(shù)資料
| 型號(hào)： | 74F8963 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | 9-Bit latched bidirectional Futurebus transceivers open-collector |
| 中文描述： | 9位鎖存雙向Futurebus收發(fā)器集電極開(kāi)路 |
| 文件頁(yè)數(shù)： | 5/10頁(yè) |
| 文件大?。?/td> | 97K |
| 代理商： | 74F8963 |
Philips Semiconductors FAST Products
Product specification
74F8962/8963
9-Bit latched bidirectional Futurebus transceivers
(open-collector)
March 11, 1993
5
FUNCTION TABLE FOR 74F8962
INPUTS
LATCH STATES
OUTPUTS
OPERATING MODE
AIn
Bn*
LEAB
LEBA
OEAB
OEBA
AB
BA
AOn
Bn
H
H
L
L
H
H
H
H
Z
X
L
L
L
L
H
H
L
L
Z
X
B and AO disabled
X
X
H
H
H
H
Qn
Qn
Z
X
H
–
L
X
L
H
H
Qn
Z
L
AO 3–state, transparent data from AI to B
L
–
L
X
L
H
L
Qn
Z
H**
X
H
X
L
H
L
Qn
H
L
X
B disabled, transparent data from B to AO
X
L
X
L
H
L
Qn
L
H
X
X
X
H
X
L
H
Qn
Qn
Z
Qn
AO 3–state, latched data to B
X
X
X
H
H
L
Qn
Qn
Qn
X
B disabled, latched to AO
X
X
H
H
L
L
Qn
Qn
Qn
Qn
Latched state to AO and B
H
–
L
L
L
L
H
L
H
L
Read back from AI to B to AO
L
–
L
L
L
L
L
H
L
H**
(both latches transparent)
Notes to function table for 74F8962
1. H =
High voltage level
2. L
=
Low voltage level
3. X =
Don’t care
4. –
=
Input not externally driven
5. Z =
High impedance ”off’ state
6. Q
n
=
High or low voltage level one setup time prior to the low–to–high LEXX transition.
7. H**=
Goes to level of pullup voltage.
8. B* =
Precaution should be taken to insure B inputs do not float. If they do they are equal to low state.
FUNCTION TABLE FOR 74F8963
INPUTS
LATCH STATES
OUTPUTS
OPERATING MODE
AIn
Bn*
LEAB
LEBA
OEAB
OEBA
AB
BA
AOn
Bn
H
H
L
L
H
H
L
L
Z
X
L
L
L
L
H
H
H
H
Z
X
B and AO disabled
X
X
H
H
H
H
Qn
Qn
Z
X
H
–
L
X
L
H
L
Qn
Z
H
AO 3–state, transparent data from AI to B
L
–
L
X
L
H
H
Qn
Z
L
X
H
X
L
H
L
Qn
L
H
X
B disabled, transparent data from B to AO
X
L
X
L
H
L
Qn
H
L
X
X
X
H
X
L
H
Qn
Qn
Z
Qn
AO 3–state, latched data to B
X
X
X
H
H
L
Qn
Qn
Qn
X
B disabled, latched to AO
X
X
H
H
L
L
Qn
Qn
Qn
Qn
Latched state to AO and B
H
–
L
L
L
L
L
L
H
H**
Read back from AI to B to AO
L
–
L
L
L
L
H
L
L
L
(both latches transparent)
Notes to function table for 74F8963
1. H =
High voltage level
2. L
=
Low voltage level
3. X =
Don’t care
4. –
=
Input not externally driven
5. Z =
High impedance ”off” state
6. Q
n
=
High or low voltage level one setup time prior to the low–to–high LEXX transition.
7. H**=
Goes to level of pullup voltage.
8. B* =
Precaution should be taken to insure B inputs do not float. If they do they are equal to low state.
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