ISPGDX2 View Datasheet(PDF) - Lattice Semiconductor
Part Name
Description
MFG CO.
'ISPGDX2' PDF : 72 Pages View PDF
Lattice Semiconductor
ispGDX2 Family Data Sheet
sysIO Differential DC Electrical Characteristics
Over Recommended Operating Conditions
Parameter
Symbol
Parameter Description
Test Conditions
LVDS
VINP VINM
VTHD
IIN
VOH
VOL
VOD
ΔVOD
VOS
ΔVOS
IOSD
Input Voltage
—
Differential Input Threshold
Input Current
0.2V ≤ VCM ≤ 1.8V
Power On
Output High Voltage for VOP or VOM
Output Low Voltage for VOP or VOM
Output Voltage Differential
Change in VOD Between High and Low
Output Voltage Offset
Change in VOS Between H and L
RT = 100Ω
RT = 100Ω
(VOP - VOM), RT = 100Ω
—
(VOP - VOM)/2, RT = 100Ω
—
Output Short Circuit Current
VOD = 0V. Driver Outputs
Shorted.
Bus LVDS1
VOH
VOL
VOD
ΔVOD
VOS
ΔVOS
IOSD
Output High Voltage for VOP or VOM
Output Low Voltage for VOP or VOM
Output Voltage Differential
Change in VOD Between H and L
Output Voltage Offset
Change in VOS Between H and L
Output Short Circuit Current
RT = 27Ω
RT = 27Ω
|VOP - VOM|, RT = 27Ω
|VOP - VOM| /2, RT = 27Ω
VOD = 0. Driver Outputs
Shorted.
1. VOP and VOM are the two outputs of the LVDS output buffer.
Min.
0
+/-100
—
—
0.9
250
—
1.125
—
—
—
0.95
240
—
1.1
—
—
Typ.
—
—
—
1.38
1.03
350
—
1.25
—
—
1.4
1.1
300
—
1.3
—
36
Max. Units
2.4
V
—
mV
+/-10
µA
1.60
V
—
V
450
mV
50
mV
1.375
V
50
mV
24
mA
1.80
V
—
V
460
mV
27
mV
1.5
V
27
mV
65
mA
LVPECL1
DC Parameter
Parameter Description
Min.
Max.
Min.
Max.
Min.
Max. Units
VCCO
Output Supply Voltage
3.0
3.3
3.6
V
VIH
Input Voltage High
1.49
2.72
1.49
2.72
1.49
2.72
V
VIL
Input Voltage Low
0.86
2.125
0.86
2.125
0.86
2.125
V
VOH
Output Voltage High
1.7
2.11
1.92
2.28
2.03
2.41
V
VOL
Output Voltage Low
0.96
1.27
1.06
1.43
1.25
1.57
V
VDIFF2
Differential Input voltage
0.3
0.3
0.3
V
1. These values are valid at the output of the source termination pack as shown above with 100-ohm differential load only (see Figure 17).
The VOH levels are 200mV below the standard LVPECL levels and are compatible with devices tolerant of the lower common mode ranges.
2. Valid for 0.2V ≤ VCM ≤ 1.8V.
Figure 17. LVPECL Driver with Three Resistor Pack
ispGDX2
LVPECL Buffer
1/4 of Bourns P/N
CAT 16-PC4F12
A
Rs
Zo
Rs
Zo
to LVPECL
differential
receiver
26
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