IDT
®
Fifteen Output Differential Buffer w/2 input mux for PCIe Gen1/2/3 1679C—10/25/16
9EX21531
Fifteen Output Differential Buffer w/2 input mux for PCIe Gen1/2/3
6
Electrical Characteristics - Clock Input Parameters
TA = T
COM;
Supply Voltage VDD = 3.3 V +/-5%
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS NOTES
Input High Voltage - DIF_IN V
I HDI F
Differential inputs
(single-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 1000 mV 1
Input Amplitude - DIF_IN V
SWING
Peak to Peak value 300 1450 mV 1
Input Slew Rate - DIF_IN dv/dt Measured differentially 0.4 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 55 % 1
Input Jitter - Cycle to Cycle J
DIFIn
Differential Measurement 0 125 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 - DIF 0.7V Current Mode Differential Outputs
T
A
= T
COM;
Supply Voltage VDD = 3.3 V +/-5%
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS NOTES
Slew rate Trf Scope avera
in
on 1 4
V/ns
1, 2, 3
Slew rate matchin
Trf
Slew rate matchin
, Sco
e avera
in
on 20
%
1, 2, 4
Voltage High VHigh 660 850 1
Voltage Low VLow -150 150 1
Max Volta
eVmax 1150 1
Min Volta
eVmin -300 1
Vswin
Vswin
Scope avera
in
off 300 mV 1, 2
Crossin
Volta
e
abs
Vcross_abs Sco
e avera
in
off 250 550 mV 1, 5
Crossing Voltage (var) -Vcross Scope averaging off 140 mV 1, 6
2
Measured from differential waveform
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 absolute)
allowed. The intent is to limit Vcross induced modulation by setting V_cross_delta to be smaller than V_cross absolute.
mV
Statistical measurement on single-ended signal
using oscilloscope math function. (Scope averaging
on)
Measurement on single ended signal using absolute
value. (Scope averaging off)
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
and V
OH
= 0.7V @ Z
O
=50
Ω
(100 differential impedance).
3
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 of Clock / falling edge rate of Clock#. It is measured in a +/-75mV window centered on the average
cross point where Clock rising meets Clock# falling. The median cross point is used to calculate the voltage thresholds the oscilloscope uses
for the edge rate calculations.
5
Vcross is defined as voltage where Clock = Clock# measured on a component test board and only applies to the differential rising edge (i.e.
Clock rising and Clock# falling).
Electrical Characteristics - Current Consumption
T
A
= 0 - 70°C; Su
l
Volta
e V
DD/
V
DDA
= 3.3 V +/-5%,
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS NOTES
I
DD3.3OP
VDD rail. All outputs active @100MHz, C
L
=
Full load;
300 350 mA 1
I
DD3.3AOP
VDDA rail. All outputs active @100MHz, C
L
=
Full load;
30 40 mA 1
I
DD3. 3PDZ
VDD Rail, All differential pairs tri-stated 12 15 mA 1
I
DD3.3APDZ
VDDA Rail, All differential pairs tri-stated 13 18 mA 1
1
Guaranteed b
desi
n and characterization, not 100% tested in
roduction.
Operating Supply Current
Powerdown Current
