W137 Datasheet, PDF (6/10 Pages) Cypress Semiconductor – Bx Notebook System Frequency Synthesizer

W137
DC Electrical Characteristics: (continued)
T_A = 0°C to +70°C; V_DDQ3 = 3.3V±5%; V_DDQ2 = 2.5V±5%; CPU0:1 = 66.6/100 MHz
Parameter
Description
Test Condition
Pin Capacitance/Inductance
C_IN
C_OUT
L_IN
Input Pin Capacitance
Output Pin Capacitance
Input Pin Inductance
Except X1 and X2
Min.
Typ.
Max. Unit
5
pF
6
pF
7
nH
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
AC clock parameters are tested and guaranteed over stated operating conditions using the stated lump capacitive load at the
clock output.
CPU Clock Outputs, CPU0:1 (Lump Capacitance Test Load = 20 pF)
CPU = 66.6 MHz CPU = 100 MHz
Parameter
Description
Test Condition/Comments
Min. Typ. Max. Min. Typ. Max. Unit
t_P
Period
Measured on rising edge at 1.25V
15
15.5 10
10.5 ns
t_H
High Time
Duration of clock cycle above 2.0V
5.2
3.0
ns
t_L
Low Time
Duration of clock cycle below 0.4V
5.0
2.8
ns
t_R
Output Rise Edge Rate Measured from 0.4V to 2.0V
1
41
4 V/ns
t_F
Output Fall Edge Rate Measured from 2.0V to 0.4V
1
41
4 V/ns
t_D
Duty Cycle
Measured on rising and falling edge at 45
1.25V
55 45
55 %
t_JC
Jitter, Cycle-to-Cycle Measured on rising edge at 1.25V. Max-
200
imum difference of cycle time between
two adjacent cycles.
200 ps
t_SK
Output Skew
Measured on rising edge at 1.25V
175
f_ST
Frequency Stabilization Assumes full supply voltage reached
3
from Power-up (cold within 1 ms from power-up. Short cycles
start)
exist prior to frequency stabilization.
175 ps
3 ms
Z_o
AC Output Impedance Average value during switching transi-
13.5
tion. Used for determining series termi-
nation value.
13.5
Ω
6