Z86C6420PSC View Datasheet(PDF) - Zilog
Part Name
Description
MFG CO.
'Z86C6420PSC' PDF : 17 Pages View PDF
PRELIMINARY
AC CHARACTERISTICS
External I/O or Memory Read and Write Timing
Z86C63/64 (20 MHz—Standard Mode Only[4])
No Symbol
Parameter
1 TdA(AS)
2 TdAS(A)
3 TdAS(DR)
4 TwAS
5 TdAZ(DS)
Address Valid to /AS rise Delay
/AS rise to Address Float Delay
/AS rise to Read Data Req’d Valid
/AS Low Width
Address Float to /DS fall
6 TwDSR
7 TwDSW
8 TdDSR(DR)
9 ThDR(DS)
10 TdDS(A)
/DS (Read) Low Width
/DS (Write) Low Width
/DS fall to Read Data Req’d Valid
Read Data to /DS rise Hold Time
/DS rise to Address Active Delay
11 TdDS(AS)
/DS rise to /AS fall Delay
12 TdR/W(AS) R//W Valid to /AS rise Delay
13 TdDS(R/W) /DS rise to R//W Not Valid
14 TdDW(DSW) Write Data Valid to /DS fall (Write) Delay
15 TdDS(DW) /DS rise to Write Data Not Valid Delay
16 TdA(DR)
17 TdAS(DS)
18 TdDM(AS)
Address Valid to Read Data Req’d Valid
/AS rise to /DS fall Delay
/DM Valid to /AS rise Delay
TA = 0°C
to +70°C
20 MHz
Min Max
15
25
120
30
0
105
65
55
0
40
25
20
25
20
25
150
35
15
Notes:
[1] When using extended memory timing add 2 TpC.
[2] Timing numbers given are for minimum TpC.
[3] See clock cycle dependent characteristics table.
[4] Low EMI is not selected.
Standard Test Load
All timing references use 2.0 V for a logic 1 and 0.8 V for a logic 0.
Z86C63/64
CPS DC-5461-02
TA = –40°C
to +105°C
20 MHz
Min Max
25
35
120
30
0
105
65
55
0
40
25
20
25
20
25
150
35
15
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Notes
[2,3]
[2,3]
[1,2,3]
[2,3]
[1,2,3]
[1,2,3]
[1,2,3]
[2,3]
[2,3]
[2,3]
[2,3]
[2,3]
[2,3]
[2,3]
[1,2,3]
[2,3]
[2,3]
13
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