ICS9220 Datasheet, PDF (10/17 Pages) Integrated Device Technology – Programmable RambusTM XDRTM Clock Generator

ICS9220
DC Characteristics - Outputs
TA = 0°C to +85°C; Supply Voltage AVDD2.5, VDD2.5 = 2.5 V +/- 0.125V (unless otherwise stated)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP
Power up latency
t_PU
Power within spec to outputs
within spec
State transition latency¹
SMBus or Mode Select
t_CO
transition to outputs valid and
within spec
Differential output crossing voltage
Output Voltage Swing (peak-to-peak
singled ended)
Absolute output low voltage
Reference Voltage for swing control
current
V_OX
V_COS
V_{OL, ABS}
Measured as shown in Fig. 3
Measured as shown in Fig. 3.
Excludes over and undershoot.
Measured at ODCLK_T/C pins
V_ISET
V_DD = 2.3V, V_OUT = 1V
0.9
300
0.85
0.98
Ratio of output low current to reference
current at typical V_DD2.5
I_OL/I_REF
I_REF is equal to V_ISET/R_RC.
Tolerance of R_RC <=+/-1%.
6.8
7
Minimum current at V_OLABS
I_{OL, ABS}
Measured at ODCLK_T/C pins
with termination per Figure 3.
45
Low-level output voltage SMBus
Low-level output current SMBus
Tristate output current
V_OLSMB
I_OL = 4 mA
-
I_OLSMB
V_OL= 0.8 V
6
I_OZ
Differential clock output pins
-
MAX UNITS
3
ms
3
ms
1.1
V
350 mV
V
1.02
V
7.2
-
-
mA
0.4
V
-
mA
50
µΑ
Notes:
1 There is no output latency or glitches if a value written to an output register is the same as its current contents.
AC Characteristics-Outputs
T_A = 0°C to +85°C; Supply Voltage AVDD2.5, VDD2.5 = 2.5 V +/- 0.125V (unless otherwise stated)
PARAMETER¹
SYMBOL
CONDITION
MIN TYP
Short term jitter (over 1 to 6 clock
cycles)
t_J2
f = 300 to 636 MHz
f = 635 to 800 MHz
-
36
-
26
Phase noise spectral purity
L₂₀
f_OFFSET = 20MHz,
f_OUT = 400MHz
Duty cycle
DC
45
Output rise and fall times
t_R, t_F 20% to 80% of output voltage 140
Difference between output rise and fall
time on same pin of a single device
t_R-F 20% to 80% of output voltage
-
Dynamic output impedance
Notes:
Z_OUT2
V_OL = 0.9 V
1000
1 Guaranteed by design and characterization, not 100% tested in production
2 Zout is defined at the output pins.
MAX
40
30
UNITS
ps
ps
-128 ps
55
%
300
ps
100
ps
-
Ω
1227G—11/05/07
10