
9
Z86C27/C97
CPS DC-2974-04
AC CHARACTERISTICS
Unique to Z86C97, T
A
=0
°
C to +70
°
C; V
CC
=+4.5 V to +5.5 V; F
OSC
= 4 MHz
No
Symbol
Parameter
Min
Max
Unit
Notes
1
2
3
4
TdA(AS)
TdAS(AS)
TdAS(DR)
TwAS
Address Valid to /AS High Delay
/AS High to Address Float Delay
/AS High to Read Data Required Valid
/AS Low Width
35
45
ns
ns
ns
ns
[2]
[2]
[1,2]
[2]
250
55
5
6
7
8
TdAZ(DS)
TwDSR
TwDSW
TdDSR(DR)
Address Float to /DS Low
/DS (Read) Low Width
DS (Write) Low Width
/DS Low to Read Data Required Valid
0
ns
ns
ns
ns
[2]
[1,2]
[1,2]
[1,2]
185
110
130
9
10
11
12
ThDR(DS)
TdDS(A)
TdDS(AS)
TdR/W(AS)
Read Data to /DS High Hold
/DS High to Address Active Delay
/DS High to /AS Low Delay
R//W Valid to /AS High Delay
5
ns
ns
ns
ns
55
55
35
[2]
[2]
[2]
13
14
15
TdDS(R/W)
TdDW(DSW)
TdDS(DW)
/DS High to R//W Not Valid
Write Data Valid to /DS Low Delay
/DS High to Write Data Not Valid
55
35
55
ns
ns
ns
[2]
[2]
[2]
16
17
18
TdA(DR)
TdAS(DS)
TdDI(DS)
Address Valid to Read Data Required Valid
/AS High to /DS Low Delay
Data Input Setup to /DS High
330
ns
ns
ns
[1,2]
[2]
[1]
65
75
Notes:
[1] When using extended memory timing, for parameters 3, 6, 7, 8, and 16, add 2 TpC (250 ns @ 4.0 MHz).
[2] Min and Max times are in nanoseconds unless otherwise noted.
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