ICS9214_07 Datasheet, PDF (9/16 Pages) Integrated Circuit Solution Inc – RambusTM XDRTM Clock Generator

Integrated
Circuit
Systems, Inc.
ICS9214
AC Characteristics-Inputs
T_A = 0°C to +85°C; Supply Voltage AVDD2.5, VDD2.5 = 2.5 V +/- 0.125V (unless otherwise stated)
PARAMETER
SYMBOL
CONDITION
MIN TYP MAX
CLK_INT/CLK_INC cycle
time¹
t_CYCLEIN
7
11
Cycle-to-Cycle Jitter
t_cyc-t_cyc2
185
Input clock duty cycle
d_tin
over 10,000 cycles
40
60
CLK_INT/CLK_INC rise and
fall time
t_R, t_F
20% to 80% of input
voltage
175
700
Difference between input rise
20% to 80% of input
and fall time on same pin of a
t_R-F
voltage
-
150
single device
Spread spectrum modulation
frequency
f_INM3
30
33
Spread spectrum modulation
index
m_I
3
NDEX
Triangular modulation
Non-triangular modulation
0.6
0.54
UNITS
ns
ps
%
ps
ps
kHz
%
%
Input clock slew rate
t_sl(I)
20% to 80% of input
voltage
1
4
Input Capacitance⁵
C_INCLK
CLK_INT, CLK_INC
7
Input Capacitance⁵
C_IN
VI = V_DD2.5 or GND
10
CLK_INT cycle time
t_CYCLETST Bypass Mode
4
40
SMBus clock frequency
f_SMB
10
100
Notes:
1. Measured at (VIH(nom) - VIL(nom))/2 and is the absolute value of the worst case deviation.
2. Measured at crossing points for differential clock input or at VTH for single-ended clock input
3. If input modulation is used. Input modulation is not necessary.
4. The amount of allowed spreading for non-triangular modulation is determined
by the induced downstream tracking skew.
5. Capacitance measured at f = 1 MHz, DC bias = 0.9V, VAC <100mV.
V/ns
pF
pF
ns
kHz
0809F—11/05/07
9