IDT
TM
/ICS
TM
Eight Output Differential Buffer for PCI Express (50-200MHz) 9DB801C REV E 01/27/11
ICS9DB801C
Eight Output Differential Buffer for PCI Express (50-200MHz)
8
Electrical Characteristics - DIF 0.7V Current Mode Differential Pair
T
A
= 0 - 70°C; V
DD
= 3.3 V +/-5%; C
L
=2pF, R
S
=33.2
Ω
, R
P
=49.9
Ω, Ι
REF
= 475Ω
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS NOTES
Current Source Output
Im
edance
Zo
1
V
O
= V
x
3000
Ω
1
Voltage High VHigh 660 850 1,3
Voltage Low VLow -150 150 1,3
Max Volta
e Vovs 1150 1
Min Volta
e Vuds -300 1
Crossin
Volta
e
abs
Vcross
abs
250 550 mV 1
Crossing Voltage (var) d-Vcross
Variation of crossing over all
ed
es
140 mV 1
Lon
Accurac
m see T
eriod min-max values 0
m1,2
Rise Time
t
r
V
OL
= 0.175V, V
OH
= 0.525V
175 700 ps 1
Fall Time
t
f
V
OH
= 0.525V V
OL
= 0.175V
175 700 ps 1
Rise Time Variation
d-t
r
125 ps 1
Fall Time Variation
d-t
f
125 ps 1
Duty Cycle
d
t3
Measurement from differential
wavefrom
45 55 % 1
Skew
t
sk3
V
T
= 50%
50 ps 1
PLL mode,
Measurement from differential
wavefrom
50 ps 1
BYPASS mode as additive
itter 50
s1
1
Guaranteed b
desi
n and characterization, not 100% tested in
roduction.
3
I
REF
= V
DD
/(3xR
R
). For R
R
= 475
Ω
(1%), I
REF
= 2.32mA. I
OH
= 6 x I
REF
and V
OH
= 0.7V @ Z
O
=50
Ω
.
Statistical measurement on single
ended signal using oscilloscope
math function.
mV
Measurement on single ended
signal using absolute value.
mV
2
All Long Term Accuracy and Clock Period specifications are guaranteed with the assumption that the input clock
complies with CK409/CK410 accuracy requirements
Jitter, Cycle to cycle
t
jcyc-cyc
Electrical Characteristics - Clock Input Parameters
T
A
= 0 - 70°C; Supply Voltage V
DD
= 3.3 V +/-5%
PARAMETER SYMBOL CONDITIONS MIN MAX UNITS NOTES
Differential Input High Voltage V
IHDIF
Differential inputs
(single-ended measurement)
600 1150 mV 1
Differential Input Low Voltage V
ILDIF
Differential inputs
(single-ended measurement)
V
SS
- 300 300 mV 1
Input Slew Rate - DIF_IN dv/dt Measured differentially 0.4 8 V/ns 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 55 % 1
Input SRC Jitter - Cycle to
Cycle
SRCJ
C2CIn
Differential Measurement 125 ps 1
1
Guaranteed by design and characterization, not 100% tested in production.
2
Slew rate measured through Vswing centered around differential zero
