GX3290 Datasheet, PDF (14/47 Pages) Semtech Corporation – 290 x 290 3.5Gb/s Crosspoint Switch

Table 2-3: DC Electrical Characteristics (Continued)
Parameter
Symbol
Conditions
Min
Typ
Max Units Notes
High-speed Inputs/Outputs
Serial Input Termination
Differential
Single-ended
—
100
—
Ω
6
—
50
—
Ω
Serial Output Termination
Differential
—
100
—
Ω
—
Serial Input Common Mode
Voltage
V_ICM
VCC_IN[1,2] = 1.2V±5%,
VCC_IN[1,2] = 1.8V±5%,
VCC_IN[1,2] = 2.5V±5%,
terminated to
VCC_IN
[1,2] -
(ΔV_SDI
_max/4)
—
VCC_IN
[1,2] -
(ΔV_SDI
_min/4)
V
7, 8, 9,
10
VCC_IN[1,2]
Serial Output Common Mode
Voltage
VCC_OUT[1,2] = 1.2V±5%, ^VCC_OUT
VCC_OUT
V_OCM
VCC_OUT[1,2] = 1.8V±5%,
VCC_OUT[1,2] = 2.5V±5%
[1,2] -
(ΔV_OD_
max/4)
—
[1,2] -
(ΔV_OD_
V
min/4)
—
Host Interface
Logic HIGH voltage on digital
input pins
V_IH
0.7 x
VDDIO_D
—
VDDIO_D
+ 0.3
V
11
Logic LOW voltage on digital
input pins
V_IL
-0.3
—
0.3 x
V
11
VDDIO_D
Output Logic LOW
I_OL = 2mA,
2.5V operation
V_OL
I_OL = 2mA,
1.8V operation
—
—
0.7
V
11
—
—
0.45
V
11
Output Logic HIGH
I_OH = -2mA,
2.5V operation
V_OH
I_OH = -2mA,
1.8 operation
1.7
—
1.35
—
—
V
11
—
V
11
Notes:
1. Total Maximum Power is lower than individual maximum currents multiplied by individual maximum supply voltages because the individual
maximum currents can not occur simultaneously (they occur at different conditions).
2. The ICC_IN1 and ICC_IN2 current flows out of the GX3290 and into the input signal source, and is subject to variability in that source. Some
variability in input signal source current draw should be assumed, and up to ±15% is possible.
3. When the common mode termination points for AC-coupled inputs are connected to VCC_IN1, VCC_IN2, the GX3290 equalizer input bias
currents can lead to current flowing out of the VCC_IN1, VCC_IN2 supply pins.
4. Currents apply for output DC-coupled applications. When AC-coupled, the current draw may be increased by up to 2x.
5. For DC-coupled applications only.
6. Input termination is selectable between 100Ω differential and 50Ω single-ended. See Section 3. Input/Output Equivalent Circuits.
7. DC common mode current into/out of each EQ input differential pair should not exceed 14mA, and the current into/out of each half of the
differential pair should not exceed 14mA.
8. No more than VCC_IN[1,2] - ΔV_{SDI_actual}/4.
9. Where it is understood that VCC_IN[1,2] have a ±5% tolerance.
10.In no case should either side of the input differential pair be allowed to rise above VCC_25_A + 0.3V or fall below -0.3V.
11.Specifications relate to all host interface pins.
GX3290 290 x 290 3.5Gb/s Crosspoint
Final Data Sheet Rev. 2
GENDOC-053317 March 2013
www.semtech.com
14 of 47
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