74F786 查看數據表（PDF） - Philips Electronics
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74F786 Datasheet PDF : 12 Pages
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Philips Semiconductors
4-bit asynchronous bus arbiter
Product specification
74F786
AC ELECTRICAL CHARACTERISTICS
SYM-
BOL
PARAMETER
tPLH
Propagation delay,
tPHL
A, B, C, D to YOUT
tPLH
Propagation delay,
tPHL
BRn to BGn
tPLH
Propagation delay,
tPHL
EN to BGn
tPHL
Propagation delay,
BRa to BGb
Tamb = +25°C
TEST
CONDITION
Waveform 1
Waveform 2
Waveform 2
VCC = +5.0V
CL = 50pF,
RL = 500Ω
MIN TYP MAX
2.5 4.5 7.5
2.5 4.5 7.5
5.0 7.0 10.0
4.5 6.5 9.5
3.0 5.0 8.0
2.5 4.5 7.5
Waveform 2 5.0 7.0 10.0
LIMITS
Tamb = 0°C to +70°C
VCC = +5.0V ± 10%
CL = 50pF,
RL = 500Ω
MIN
MAX
2.0
8.5
2.5
7.5
4.5
10.5
4.0
10.0
2.5
8.5
2.5
8.0
4.5
10.5
Tamb = –40°C to
+85°C
VCC = +5.0V ± 10%
CL = 50pF,
RL = 500Ω
MIN
MAX
2.0
8.5
2.5
7.5
4.5
10.5
4.0
10.0
2.5
8.5
2.5
8.0
4.5
10.5
UNIT
ns
ns
ns
ns
AC WAVEFORMS
A, B, C, D
YOUT
VM
VM
tPLH
VM
tPHL
VM
SF00445
Waveform 1. Propagation delay for AND gate to output
BRn, EN
BGn
VM
VM
tPHL
VM
tPLH
VM
SF00446
Waveform 2. Propagation delay for bus request or enable to
bus grant output
BRa
BGa
VM
VM
BRb
tPHL
VM
BGb
SF00447
Waveform 3. Propagation delay for bus request to bus grant
output
Notes to AC waveforms
1. For all waveforms, VM = 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.
February 14, 1991
7
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