LCMXO2280C-5TN144C LATTICE SEMICONDUCTOR, LCMXO2280C-5TN144C Datasheet - Page 184

• 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

September 2007
Introduction
One requirement for design engineers using programmable devices is to be able to calculate the power dissipation
for a particular device used on a board. Lattice’s ispLEVER
allows designers to calculate the power dissipation for a given device. This technical note provides users with
details for using the Power Calculator to calculate the power consumption of the Lattice MachXO™ family of
devices. General guidelines for reducing power consumption are also included.
Power Supply Sequencing and Hot Socketing
The MachXO devices have been designed to ensure predictable behavior during power-up and power-down.
Power supplies can be sequenced in any order. During power-up and power-down sequences, the I/Os remain in
tristate until the power supply voltage is high enough to ensure reliable operation. In addition, leakage into I/O pins
is controlled to within specified limits listed in the
the rest of the system. These capabilities make the MachXO ideal for many multiple power supply and hot-swap
applications.
Recommended Power-up Sequence
As described in the previous paragraph, the supplies can be sequenced in any order. However, once internal power
is achieved (determined by VCC, VCCAUX) the device releases I/Os from tristate and the management of I/Os
becomes the designer’s responsibility. Therefore, to simplify a system design it is recommended that supplies be
sequenced VCCIO, VCC, VCCAUX. If VCCIO is tied to VCC or VCCAUX, it is recommended that VCCIO and the
associated power supply are powered up before the remaining supply.
Please refer to the Hot Socketing section of the
Power Calculator Hardware Assumptions
Power consumption of the device can be broken down coarsely into the DC portion and the AC portion.
The Power Calculator reports the power dissipation in terms of:
The DC power (or the static power consumption) is the total power consumption of the used and the unused
resources. These power components are fixed for each resource and depend upon the number of resource units
utilized. The DC component also includes the static power dissipation for the unused resources of the device.
The AC portion of the power consumption is associated with the used resources and is the dynamic part of the
power consumption. Its power dissipation is directly proportional to the frequency at which the resource is running
and the number of resource units used.
Power Calculator
Power Calculator Equations
The power equations used in the Power Calculator are shown below.
© 2007 Lattice Semiconductor Corp. All Lattice trademarks, registered trademarks, patents, and disclaimers are as listed at www.latticesemi.com/legal. All other brand
or product names are trademarks or registered trademarks of their respective holders. The specifications and information herein are subject to change without notice.
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1. DC portion of the power consumption
2. AC portion of the power consumption
Power Estimation and Management
MachXO Family Data Sheet
MachXO Family Data
11-1
®
design tools include the Power Calculator tool which
Sheet. This allows for easy integration with
for MachXO Devices
for more information.
Technical Note TN1090
tn1090_01.1