PRELIMINARY
W150
Document #: 38-07177 Rev. *B
Page 12 of 15
tF
Output Fall Edge Rate
Measured from 2.4V to 0.4V
1
4
1
4
V/ns
tD
Duty Cycle
Measured on rising and falling edge at
1.5V
45
55
45
55
%
tSK
Output Skew
Measured on rising and falling edge at
1.5V
250
250
ps
tPD
Propagation Delay
Measured from SDRAMIN
3.7
3.7
ns
Zo
AC Output Impedance
Average value during switching
transition. Used for determining series
termination value.
15
15
Ω
48-MHz Clock Output (Lump Capacitance Test Load = 20 pF)
Parameter
Description
Test Condition/Comments
CPU = 66.8/100 MHz
Unit
Min.
Typ.
Max.
f
Frequency, Actual
Determined by PLL divider ratio (see m/n below)
48.008
MHz
fD
Deviation from 48 MHz
(48.008 – 48)/48
+167
ppm
m/n
PLL Ratio
(14.31818 MHz x 57/17 = 48.008 MHz)
57/17
tR
Output Rise Edge Rate
Measured from 0.4V to 2.4V
0.5
2
V/ns
tF
Output Fall Edge Rate
Measured from 2.4V to 0.4V
0.5
2
V/ns
tD
Duty Cycle
Measured on rising and falling edge at 1.5V
45
55
%
fST
Frequency Stabilization
from Power-up (cold
start)
Assumes full supply voltage reached within 1 ms from
power-up. Short cycles exist prior to frequency stabili-
zation.
3ms
Zo
AC Output Impedance
Average value during switching transition. Used for deter-
mining series termination value.
25
Ω
24-MHz Clock Output (Lump Capacitance Test Load = 20 pF
Parameter
Description
Test Condition/Comments
CPU = 66.8/100 MHz
Unit
Min.
Typ.
Max.
f
Frequency, Actual
Determined by PLL divider ratio (see m/n below)
24.004
MHz
fD
Deviation from 24 MHz (24.004 – 24)/24
+167
ppm
m/n
PLL Ratio
(14.31818 MHz x 57/34 = 24.004 MHz)
57/34
tR
Output Rise Edge Rate Measured from 0.4V to 2.4V
0.5
2
V/ns
tF
Output Fall Edge Rate
Measured from 2.4V to 0.4V
0.5
2
V/ns
tD
Duty Cycle
Measured on rising and falling edge at 1.5V
45
55
%
fST
Frequency Stabilization
from Power-up (cold
start)
Assumes full supply voltage reached within 1 ms from
power-up. Short cycles exist prior to frequency stabili-
zation.
3ms
Zo
AC Output Impedance
Average value during switching transition. Used for
determining series termination value.
25
Ω
Ordering Information
Ordering Code
Package Type
Industrial Product Flow
W150H
56-pin SSOP
Commercial, 0 to 70°C
W150HT
56-pin SSOP – Tape and Reel
Commercial, 0 to 70°C
SDRAM 0:15, _F Clock Outputs (Lump Capacitance Test Load = 30 pF) (continued)
Parameter
Description
Test Condition/Comments
CPU = 66.8 MHz
CPU = 100 MHz
Unit
Min.
Typ.
Max.
Min.
Typ.
Max.
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