LCMXO2280C-5TN144C LATTICE SEMICONDUCTOR, LCMXO2280C-5TN144C Datasheet - Page 110

• Manufacturer Part Number: LCMXO2280C-5TN144C
• Description: MACHXO PLD FLASH, SCRAM 1.8V, SMD
• Manufacturer: LATTICE SEMICONDUCTOR
• Series: MachXOr

Specifications of LCMXO2280C-5TN144C

• Cpld Type: FLASH
• No. Of Macrocells: 1140
• No. Of I/o's: 113
• Propagation Delay: 3.6ns
• Global Clock Setup Time: 1.1ns
• Frequency: 600MHz
• Supply Voltage Range: 1.71V To 3.465V
• Operating: RoHS Compliant

Lattice Semiconductor
Figure 8-4. 5V Input Interface Example
The value of this external resistor will depend on the PCI clamp diode characteristics. The voltage vs. current data
across this diode can be found in the device IBIS model.
In order to interface to 5V input, it is recommended that the V
Below is an example of how to calculate the value of this external resistor when V
• Maximum voltage at input pin, V
• Bank V
• Maximum voltage drop across clamp diode, V
• The current across the clamp diode at V
Table 8-6. Power Clamp Data from a Typical IBIS Model
• Assume the maximum output voltage of the driving device is V
power clamp portion of the IBIS file, for a LVCMOS3.3 input model with PCI Clamp turned on. When V
clamp diode current is I
then be calculated as follows:
CCIO
= 2.75V
1. Always consult the latest IBIS data available from Lattice. IBIS model information is
available by device family on the
R
D
EXT
= 382
5V Input
Voltage
-1.40
-1.30
-1.20
-1.10
-1.00
-0.90
-0.80
-0.70
-0.60
-0.50
-0.40
-0.30
-0.20
-0.10
= (V
0.00
µ
INMAX
A.
EXT
- V
External Resistor
= 3.75V (see the
INMAX
D
can be found in the power clamp data of the IBIS file. Below is the
)/I
D
Lattice web
D
= V
= (5.25V - 3.75V)/382
INMAX
I (max.)
0.23
0.15
408
402
395
389
382
380
380
380
380
380
353
8-7
3.8
51
MachXO Family Data Sheet
1
site.
- V
CCIO
CCIO
EXT
V
is set between 2.5V to 3.3V.
CCIO
= 3.75 - 2.75 =1V
= 5.25V. The value of the external resistor can
PCI Clamp Diode
µ
A = 3.93 K ohm
MachXO sysIO Usage Guide
Units
µA
µA
µA
µA
µA
µA
µA
µA
µA
µA
µA
µA
µA
µA
µA
CCIO
is 2.75V.
for more details)
D
is 1V, the