W164 Datasheet, PDF (11/11 Pages) Cypress Semiconductor – Spread Spectrum Desktop/Notebook System Frequency Generator

W164
48-MHz and 24-MHz Clock Output (Lump Capacitance Test Load = 20 pF)
Parameter
Description
f
Frequency, Actual
Test Condition/Comments
Determined by PLL divider ratio (see m/n below)
f_D
Deviation from 48 MHz
(48.008 – 48)/48
m/n
PLL Ratio
(14.31818 MHz x 57/17 = 48.008 MHz)
t_R
Output Rise Edge Rate Measured from 0.4V to 2.4V
t_F
Output Fall Edge Rate
Measured from 2.4V to 0.4V
t_D
Duty Cycle
Measured on rising and falling edge at 1.5V
f_ST
Frequency Stabilization Assumes full supply voltage reached within 1 ms
from Power-up (cold start) from power-up. Short cycles exist prior to
frequency stabilization.
Z_o
AC Output Impedance
Average value during switching transition. Used
for determining series termination value.
CPU = 66.8/100 MHz
Min. Typ. Max. Unit
48.008
24.004
MHz
+167
ppm
57/17, 57/34
0.5
2 V/ns
0.5
2 V/ns
45
55 %
3 ms
25
:
Ordering Information
Ordering Code
W164
Package Name
Package Type
G
28-pin SOIC (300 mils)
Package Diagram
DIMENSIONS IN INCHES[MM]
PART #
S28.4 STANDARD PKG.
SZ28.4 LEAD FREE PKG.
14
28-Lead Molded SOIC S28
MIN.
MAX.
PIN 1 ID
1
DETAIL A
EXTERNAL LEAD DESIGN
15
.720[18.288]
.730[18.542]
.395[10.033]
.405[10.287]
.530[13.462]
.545[13.843]
28
SEATING PLANE
.013[0.330]
.019[0.482]
OPTION 1
.026[0.660]
.032[0.812]
.015[0.381]
.020[0.508]
OPTION 2
A
.050[1.270]
TYP.
.090[2.286]
.109[2.768]
.002[0.050]
.014[0.355]
0.004[0.102]
.015[0.381]
.050[1.270]
.007[0.177]
.013[0.330]
While SLI has reviewed all information herein for accuracy and reliability, Spectra Linear Inc. assumes no responsibility for the use of any cir-
cuitry or for the infringement of any patents or other rights of third parties which would result from each use. This product is intended for use in
normal commercial applications and is not warranted nor is it intended for use in life support, critical medical instruments, or any other applica-
tion requiring extended temperature range, high reliability, or any other extraordinary environmental requirements unless pursuant to additional
processing by Spectra Linear Inc., and expressed written agreement by Spectra Linear Inc. Spectra Linear Inc. reserves the right to change any
circuitry or specification without notice.
Rev 1.0, November 28, 2006
Page 11 of 11