ICS841S01 Datasheet, PDF (8/16 Pages) Integrated Device Technology – PCI EXPRESS™ CLOCK GENERATOR

ICS841S01
PCI EXPRESS™ CLOCK GENERATOR
PRELIMINARY
TABLE 6. AC CHARACTERISTICS, V_{DD_REF} = V_DDA = V_{DD_SRC} = 3.3V±5%, TA = 0°C TO 70°C
Symbol Parameter
Test Conditions Minimum Typical Maximum Units
fref
Frequency
25
MHz
sclk
SCLK Frequency
400
kHz
XTAL
Frequency Tolerance; NOTE 1
External
Reference
odc
SRCT/SRCC Duty Cycle; NOTE 2, 7
50
ppm
0
ppm
47
53
%
t_PERIOD
tjit(cc)
Average Period; NOTE 3
SRCT/C Cycle-to-Cycle Jitter; NOTE 2, 7
9.9970
10.0533 ns
35
ps
tjit(per) Period Jitter, RMS; NOTE 2, 7
3
ps
t_R / t_F SRCT/SRCC Rise/Fall Time; NOTE 4
20% to 80%
175
700
ps
t_RFM
Rise/Fall Time Matching; NOTE 5
20
%
t_DC
XTAL_IN Duty Cycle; NOTE 6
47.5
52.5
%
Δt_R / t_F Rise/Fall Time Variation
125
ps
V_HIGH
Voltage High
520
800
mv
V_LOW
Voltage Low
-150
mv
V_OX
Output Crossover Voltage
@ 0.7V Swing
250
550
mV
V_OVS
Maximum Overshoot Voltage
V_HIGH + 0.3
V
V_UDS
Minimum Undershoot Voltage
-0.3
V
V_RB
Ring Back Voltage
0.2
V
NOTE 1: With recommended crystal.
NOTE 2: Measured at crossing point V_OX.
NOTE 3: Measured at crossing point V_OX at 100MHz.
NOTE 4: Measured from V_OL = 0.175V to V_OH = 0.525V.
NOTE 5: Determined as a fraction of 2*(t_R – t_F) / (t_R + t_F).
NOTE 6: The device will operate reliably with input duty cycles up to 30/70% but the REF clock duty cycle will not be within
specification
NOTE 7: Measured using a 50Ω to GND termination.
IDT^™ / ICS^™ PCI EXPRESS CLOCK GENERATOR
8
ICS841S01BG REV. B MAY 23, 2007