MT89L86
Advance Information
AC Electrical Characteristics† - Motorola Multiplexed Bus Mode
Voltages are with respect to ground (VSS) unless otherwise stated.
‡
Characteristics
AS pulse width
Sym
Min
Typ
Max
Units Test Conditions
1
2
3
4
5
6
7
8
tASW
tADS
tADH
tDDR
tCSH
tCSS
tDHW
tDWS
80
2
ns
ns
ns
Address setup from AS falling
Address hold from AS falling
Data setup from DTA Low on Read
CS hold after DS falling
2
10
0
ns C =150 pF
L
ns
ns
ns
ns
CS setup from DS rising
0
Data hold after write
8
Data setup from DS - write
(fast write)
25
tSWD
9
Valid Data Delay on write
(slow write)
122
90
ns
10 R/W setup from DS rising
11 R/W hold after DS falling
12 Data hold after read
tRWS
tRWH
60
9
ns
ns
tDHR
10
50
ns C =150 pF,
L
R =1 KΩ
L
tDSH
tAKD
13 DS delay after AS falling
14 Acknowledgment Delay:
10
ns
C =150 pF
L
560
62/30
25
1220
120/53
65
ns
ns
ns
ns
Reading Data Memory
Reading/Writing Conn. Memories
Writing Control & Mode Regs.
52
120
Reading from Control & Mode Regs.
15 Acknowledgment Hold Time
tAKH
50
80
ns C =150 pF,
L
R =1 KΩ
L
† Timing is over recommended temperature & power supply voltages.
‡ Typical figures are at 25°C and are for design aid only: not guaranteed and not subject to production testing.
*
High Impedance is measured by pulling to the appropriate rail with R , with timing corrected to cancel time taken to discharge C .
L L
34
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