IDT
®
15 Output PCIe G2/QPI Differential Buffer with 2:1 Input Mux 1578—01/18/11
9EX21501
15 Output PCIe G2/QPI Differential Buffer with 2:1 Input Mux
5
Datasheet
Electrical Characteristics - Absolute Maximum Ratings
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
GND-0.5 V 1
Input High Voltage V
IH
Except for SMBus interface V
D
+0.5V V 1
Input High Voltage V
IHSMB
SMBus clock and data pins 5.5V V 1
Storage Temperature Ts -65 150
°
C
1
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
Operation under these conditions is neither implied nor guaranteed.
Electrical Characteristics - Clock Input Parameters
TA = T
COM
or T
IND;
Supply Voltage VDD/VDDA = 3.3 V +/-5%, See Test Loads for Loading Conditions
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS NOTES
Input High Voltage - DIF_IN V
IHDIF
Differential inputs
(sin
le-ended measurement)
600 800 1150 mV 1
Input Low Voltage - DIF_IN V
ILDIF
Differential inputs
(single-ended measurement)
V
SS
- 300 0 300 mV 1
Input Common Mode
Voltage - DIF_IN
V
COM
Common Mode Input Voltage 300 400 1000 mV 1
Input Amplitude - DIF_IN V
SWING
Peak to Peak value 300 750 1450 mV 1
Input Slew Rate - DIF_IN dv/dt Measured differentially 0.4 2 8 V/ns 1,2
Input Leakage Current I
IN
V
IN
= V
DD ,
V
IN
=
GND -5 5 uA 1
Input Duty Cycle d
tin
Measurement from differential wavefrom 45 50 55 % 1
Input Jitter - Cycle to Cycle J
DIFI n
Differential Measurement 0 50 125 ps 1
1
Guaranteed by design and characterization, not 100% tested in production.
2
Slew rate measured through +/-75mV window centered around differential zero
Electrical Characteristics - Phase Jitter Parameters
TA = T
COM
or T
IND;
Supply Voltage VDD/VDDA = 3.3 V +/-5%, See Test Loads for Loading Conditions
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Notes
t
jphPCIeG1
PCIe Gen 1 32/42 86
ps
(p-p)
1,2,3,4
PCIe Gen 2 Lo Band
10kHz < f < 1.5MHz
1.2/1.5 3
ps
(rms)
1,2,4
PCIe Gen 2 High Band
1.5MHz < f < Nyquist (50MHz)
2.1/2.7
3.1
ps
(rms)
1,2,4
t
jphQPI
QPI
(133MHz, 4.8Gb/s, 6.4Gb/s 12UI)
0.25/0.28 0.5
ps
(rms)
1,4,5
t
jphPCIeG1
PCIe Gen 1 2 10
ps
(p-p)
1,2,3
PCIe Gen 2 Lo Band
10kHz < f < 1.5MHz
0.0 0.3
ps
(rms)
1,2,6
PCIe Gen 2 High Band
1.5MHz < f < Nyquist (50MHz)
0.30 0.5
ps
(rms)
1,2,6
t
jphQPI
QPI
(133MHz, 4.8Gb/s, 6.4Gb/s 12UI)
0.25 0.4
ps
(rms)
1,5,6
1
Applies to all outputs. Device driven by IDT CK410B+ (932S421CGLF) or equivalent
6
For RMS figures, additive jitter is calculated by solving the following equation: (Additive jitter)^2 = (total jittter)^2 - (input jitter)^2
4
First number is Low BW
second number is Hi BW.
5
Calculated from Intel-su
lied Clock Jitter Tool v 1.6.4
with 7.8M rolloff
Phase Jitter, PLL Mode
Additive Phase Jitter,
Bypass mode
t
jphPCIeG2
t
jphPCIeG2
2
See htt
://www.
cisi
.com for com
lete s
ecs
3
Sam
le size of at least 100K c
cles. This fi
ures extra
olates to 108
s
k-
k @ 1M c
cles for a BER of 1-12.