932SQ428
PCIE GEN 2/3 & QPI CLOCK FOR ROMLEY-BASED SERVERS
IDT®
PCIE GEN 2/3 & QPI CLOCK FOR ROMLEY-BASED SERVERS 6
932SQ428 REV E 042312
Electrical Characteristics - Absolute Maximum Ratings
Electrical Characteristics - Current Consumption
DC Electrical Characteristics - Differential Current Mode Outputs
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS NOTES
3.3V Core Supply Voltage VDDA 4.6 V 1,2
3.3V Logic Supply Voltage VDD 4.6 V 1,2
Input Low Voltage V
IL
GN D-0 .5 V 1
Input High Voltage V
IH
Except for SMBus interface V
DD
+0. 5V V
1
Input High Voltage V
IH SMB
SMBus clock and data pins 5.5V V 1
Storage Temperature Ts -65 150
°
C1
Junction Temperature Tj 125 °C
1
Input ESD protection
ESD prot Human Body Model 2000 V
1
1
Guaranteed by design and characterization, not 100% tested in production.
2
O
eration under these conditions is neither im
lied nor
uaranteed.
TA = T
COM;
Supply Voltage VDD = 3.3 V +/-5%
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS NOTES
Operating Supply Current I
DD3.3OP
All outputs active @100MHz, C
L
= Full load;
250 300 m A 1
Powerdown Current
I
DD3.3PD Z
All differential pairs tri-stated 12 20 mA
1
1
Guaranteed b
desi
n and characterization, not 100% tested in
roduction.
T
A
= T
COM;
Supply Voltage VDD = 3.3 V +/-5%
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS NOTES
Slew rate Trf Sco
e avera
in
on 1 2.4 4
V/ns
1, 2, 3
Slew rate matching
Δ
Trf
Slew rate matching, Scope
avera
in
on
920
%
1, 2, 4
Rise/Fall Time Variation
Δ
Trf
Rise/fall variation, Scope
avera
in
off
Volta
e Hi
hVHi
h 660 772 850 1
Volta
e Low VLow -150 9 150 1
Max Volta
e Vmax 810 1150 1, 7
Min Volta
e Vmin -300 -17 1, 7
Vswin
Vswin
Sco
e avera
in
off 300 1446 mV 1, 2
Crossing Voltage (abs) Vcross_abs Scope averaging off 250 351 550 mV 1, 5
Crossing Voltage (var)
Δ
-Vcross Scope averaging off 24 140 mV 1, 6
2
Measured from differential waveform
7
Includes overshoot and undershoot.
Statistical measurement on
single-ended signal using
mV
Measurement on single ended
signal using absolute value.
mV
1
Guaranteed by design and characterization, not 100% tested in production. IREF = VDD/(3xR
R
). For R
R
= 475
Ω
(1%), I
REF
= 2.32mA. I
OH
= 6 x I
REF
OH
O
=50
Ω
(100
Ω
differential impedance).
Slew rate is measured through the Vswing voltage range centered around differential 0V. This results in a +/-150mV window around
differential 0V.
4
Matching applies to rising edge rate for Clock and falling edg e rate for Clock#. It is measured using a +/-75mV window centered on the
average cross po int where Clock rising meets Clock# falling. The median cross point is used to calculate the voltage thresholds the
oscilloscope is to use for the edge rate calculations.
5
Vcross is defined as voltage w here Clock = Clock# measured on a component test board and only applies to the differential rising edge
(i.e. Clock rising and Clock# falling).
6
The total variation of all Vcross measurements in any particular system. Note that this is a subset of V_cross_min/max (V_cross a bsolut e)
allow ed. The intent is to limit Vcross induced modulation by setting V_cross_delta to be smaller than V_cross absolute.
