ICS9214 Datasheet, PDF (10/16 Pages) Integrated Circuit Systems – Rambus XDR Clock Generator

Integrated
Circuit
Systems, Inc.
ICS9214
AC Characteristics-Outputs
T_A = 0°C to +70°C; Supply Voltage AVDD2.5, VDD2.5 = 2.5 V +/- 0.125V (unless otherwise stated)
PARAMETER¹
SYMBOL
CONDITION
MIN
TYP MAX
Output clock cycle time
t_CYCLE
1.5
2.5
Short term jitter (over 1 to
6 clock cycles)
t_J2
f = 400 to 635 MHz
-
f = 635 to 800 MHz
-
40
30
Output Phase error when
tracking SSC
t_ERR,SSC
-100
100
T_A = 0°C to +70°C,
Change in skew
t_SKEW3
AVDD2.5, VDD2.5 =
-
15
2.5 V +/- 0.125V
Long term average output
duty cycle
DC
45
55
Cycle-to-cycle duty cycle
error
t_DCERR
f = 400 to 635 MHz
-
f = 635 to 800 MHz
-
40
30
Output rise and fall times
t_R, t_F
20% to 80% of output
voltage
100
300
Difference between
output rise and fall time
on same pin of a single
t_R-F
20% to 80% of output
voltage, f = 400 to 800 MHz
-
100
device
Dynamic output
impedance
Z_OUT4
V_OL = 0.9 V
1000
-
Notes:
1. Max and min output clock cycle times are based on nominal output frequencies
of 400 and 667 MHz respectively. For spread spectrum modulated input clocks,
the output clocks track the input modulation.
2. Output short-term jitter is the absolute value fo the worst case deviation and is
defined in the Jitter section.
3. tSKEW is the timing difference between any two of the four differential clocks and
is measured at common mode voltage.
4. Zout is defined at the output pins.
5. Guaranteed by design and characterization, not 100% tested in production
UNITS
ns
ps
ps
ps
ps
%
ps
ps
ps
ps
Ω
Thermal Characteristics
Parameter
Thermal Resistance Junction to
Ambient
Thermal Resistance Junction to Case
Thermal Resistance Junction to Top of
Case
Maximum Case Temp
Symbol
θ_JA
θ_JA
θ_JA
θ_JC
Ψ_JT
Conditions
Still air
1 m/s air flow
3 m/s air flow
Still Air
Min.
Typ.
120
95
80
20
4.5
Max.
120
Units
°C/W
°C/W
°C/W
°C/W
°C/W
°C
0809D—04/07/06
10