參數(shù)資料
型號(hào): 74F786
廠商: NXP Semiconductors N.V.
英文描述: 4-bit asynchronous bus arbiter(4位異步總線判優(yōu)器)
中文描述: 4位異步總線仲裁器(4位異步總線判優(yōu)器)
文件頁(yè)數(shù): 7/12頁(yè)
文件大?。?/td> 95K
代理商: 74F786
Philips Semiconductors
Product specification
74F786
4-bit asynchronous bus arbiter
February 14, 1991
7
AC ELECTRICAL CHARACTERISTICS
LIMITS
T
amb
= +25
°
C
T
amb
= 0
°
C to +70
°
C
T
amb
= –40
°
C to
+85
°
C
SYM-
BOL
PARAMETER
TEST
V
CC
= +5.0V
C
L
= 50pF,
R
L
= 500
TYP
V
CC
= +5.0V
±
10%
C
L
= 50pF,
R
L
= 500
MIN
V
CC
= +5.0V
±
10%
C
L
= 50pF,
R
L
= 500
MIN
UNIT
CONDITION
MIN
MAX
MAX
MAX
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
Propagation delay,
A, B, C, D to YOUT
Waveform 1
2.5
2.5
4.5
4.5
7.5
7.5
2.0
2.5
8.5
7.5
2.0
2.5
8.5
7.5
ns
Propagation delay,
BRn to BGn
Waveform 2
5.0
4.5
7.0
6.5
10.0
9.5
4.5
4.0
10.5
10.0
4.5
4.0
10.5
10.0
ns
Propagation delay,
EN to BGn
Waveform 2
3.0
2.5
5.0
4.5
8.0
7.5
2.5
2.5
8.5
8.0
2.5
2.5
8.5
8.0
ns
t
PHL
Propagation delay,
BRa to BGb
Waveform 2
5.0
7.0
10.0
4.5
10.5
4.5
10.5
ns
AC WAVEFORMS
V
M
V
M
V
M
V
M
A, B, C, D
YOUT
t
PLH
t
PHL
SF00445
Waveform 1. Propagation delay for AND gate to output
V
M
V
M
V
M
V
M
t
PHL
t
PLH
BRn, EN
BGn
SF00446
Waveform 2. Propagation delay for bus request or enable to
bus grant output
V
M
V
M
BRa
BGa
BRb
BGb
V
M
t
PHL
SF00447
Waveform 3. Propagation delay for bus request to bus grant
output
Notes to AC waveforms
1. For all waveforms, V
M
= 1.5V.
2. a and b represents any of the bus requests or grants. BGa
low–to–high transition and the BGb high–to–low transition occur
simultaneously.
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