W161H
| Model | W161H |
| Description | Processor Specific Clock Generator, 133MHz, CMOS, PDSO48, 0.300 INCH, MO-118AA, SSOP-48 |
| PDF file | Total 10 pages (File size: 115K) |
| Chip Manufacturer | CYPRESS |
PRELIMINARY
DC Electrical Characteristics:
T
A
= 0°C to +70°C, V
DDQ3
= 3.3V±5%, V
DDQ2
= 2.5V±5% (continued)
Parameter
Crystal Oscillator
V
TH
C
LOAD
C
IN,X1
C
IN
C
OUT
L
IN
X1 Input threshold Voltage
[4]
Load Capacitance, Imposed on
External Crystal
[5]
X1 Input Capacitance
[6]
Input Pin Capacitance
Output Pin Capacitance
Input Pin Inductance
Pin X2 unconnected
Except X1 and X2
1.65
18
28
5
6
7
Description
Test Condition
Min.
Typ.
Max.
W161
Unit
V
pF
pF
pF
pF
nH
Pin Capacitance/Inductance
3.3V AC Electrical Characteristics
T
A
= 0°C to +70°C, V
DDQ3
= 3.3V±5%,V
DDQ2
= 2.5V± 5%, f
XTL
= 14.31818 MHz
Spread Spectrum function turned off
AC clock parameters are tested and guaranteed over stated operating conditions using the stated lump capacitive load at the
clock output.
[7]
3V66 Clock Outputs, 3V66_0:3 (Lump Capacitance Test Load = 30 pF)
Parameter
f
t
R
t
F
t
D
f
ST
Description
Frequency
Output Rise Edge Rate
Output Fall Edge Rate
Duty Cycle
Frequency Stabilization
from Power-up (cold start)
AC Output Impedance
Note 8
Measured from 0.4V to 2.4V
Measured from 2.4V to 0.4V
Measured on rising and falling edge at 1.5V
Assumes full supply voltage reached within
1 ms from power-up. Short cycles exist prior
to frequency stabilization.
Average value during switching transition.
Used for determining series termination
value.
15
1
1
45
Test Condition/Comments
Min.
Typ.
66.6
4
4
55
3
Max.
Unit
MHz
V/ns
V/ns
%
ms
Z
o
Ω
Notes:
4. X1 input threshold voltage (typical) is V
DD
/2.
5. The W161 contains an internal crystal load capacitor between pin X1 and ground and another between pin X2 and ground. Total load placed on crystal is 18 pF;
this includes typical stray capacitance of short PCB traces to crystal.
6. X1 input capacitance is applicable when driving X1 with an external clock source (X2 is left unconnected).
7. Period, jitter, offset, and skew measured on rising edge at 1.5V.
8. 3V66 is CPU/2 for CPU =133 MHz and (2 x CPU)/3 for CPU = 100 MHz.
Document #: 38-07162 Rev. **
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