87C196LA 查看數據表（PDF） - Intel
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87C196LA Datasheet PDF : 21 Pages
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AUTOMOTIVE — 87C196LA
Table 7. AC Characteristics (Continued)
Symbol
Parameter
Min
Max
Units
TWHLH
TWHAX
TRHAX
WR# High to ALE High
AD15:8 Hold after WR# High
AD15:8 Hold after RD# High
t – 10
t – 30
t – 30
t + 15
ns(3)
ns(4)
ns(4)
NOTES:
1. Testing performed at 4.0 MHz with PLL enabled. With the PLL bypassed, the device is tested only
down to 8 MHz. However, the device is static by design and will typically operate below 1 Hz.
2. Typical specifications, not guaranteed.
3. Assuming back-to-back bus cycles.
4. 8-bit bus only.
Table 8. AC Characteristics
Symbol
Parameter
Min
Max
The system must meet these specifications to work with the 87C196LA
TAVDV
TRLDV
TCLDV
TRHDZ
TRXDX
Address Valid to Input Data Valid
RD# Low to Input Data Valid
CLKOUT Low to Input Data Valid
RD# High to Input Data Float
Data Hold after RD# Inactive
3t – 55
t – 22
t – 50
t
0
Character
A
C
D
L
Q
R
W
X
Table 9. AC Timing Symbol Definitions
Signal(s)
AD15:0
CLKOUT
AD15:0, AD7:0
ALE
AD15:0, AD7:0
RD#
WR#, WRL#
XTAL1
Character
H
L
V
X
Z
High
Low
Valid
No Longer Valid
Floating (low impedance)
Condition
Units
ns
ns
ns
ns
ns
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