SAE 81C90/91
07Feb95@09:05h Intermediate Version
AC Characteristics (General Timing)
CC = 5 V ± 10 %; VSS = 0 V
V
TA = – 40 to + 110 ˚C
Parameter
Symbol
Limit Values
Unit Test Conditions
min.
max.
-
Oscillator period
tOSC SR 50
ns
Clock input high time
Clock input low time
Reset pulse width
tH
tL
SR 23.5
SR 23.5
–
ns
–
ns
tRES SR 2
tQR DC –
tQF DC –
tQRC DC –
tQFC DC –
–
tOSC
1)
Output rise time
40
40
20
20
ns
ns
ns
ns
C = 70 pF
L
1)
Output fall time
C = 70 pF
L
1)
CLKOUT rise time
C = 50 pF
L
1)
CLKOUT fall time
C = 50 pF
L
1)
Not 100% tested, guaranteed by design characterization.
AC Characteristics (SI Timing)
V
CC = 5 V ± 10 %;
VSS = 0 V
TA = – 40 to + 110 ˚C;
CL = 50 pF
Parameter
Symbol
Limit Values
Unit Test Conditions
min.
max.
Chip Select Setup
Clock High Time
tCSS SR 10
ns
ns
tCH SR 1.5 tOSC
+
+
10
Clock Low Time
tCL SR 1.5 tOSC
ns
10
Clock Period
tC
SR 4 tOSC
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
DI Setup
tDIS SR 10
tDIH SR 0
tADO DC 3 tOSC
tOD DC
DI Hold
Address to Data Out
Output Delay
25
25
Data Float after CS high
Chip Select Hold
Write to Clock
W to CS high
tDF DC
tCSH SR 1 tOSC
tWC
0
tWCS SR 0
tADI DC 0
Address to Data In
Semiconductor Group
37
INFINEON [ Infineon ]
