Migrating from FM24V02 to FM24V02A – KBA96041 | Cypress Semiconductor
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Migrating from FM24V02 to FM24V02A – KBA96041
Is FM24V02A a drop-in replacement for the FM24V02 device? What all are differences between the new (FM24V02A) and the old (FM24V02) parts?
The FM24V02A is a new silicon revision of the existing FM24V02 device and is a drop-in replacement for the FM24V02 device. The software can read the device ID to differentiate between FM24V02A and FM24V02. The device ID for the FM24V02A is 004201h and for the FM24V02 is 004200h. Apart from this change, there is no change in firmware required to migrate. However, the two silicon revisions have the following features/parameters differences, which should be evaluated before migrating from the older silicon to the newer silicon.
|Device ID||004200h||004201h||Need to update the new device ID in firmware.|
|Surface mount lead soldering temperature||260 ºC for 10 seconds||260 ºC for 3 seconds||260 ºC for 3 s is recommended profile for the Cypress's Pb-Free parts which allow up to 3 solder reflow cycles. Therefore, the soldering specs are essentially the same between two parts, but stated in different contexts. The FM24V02 states 260 ºC for 10 sec max, whereas the FM24V02A states for 3 seconds but allows up to 3 solder reflow cycles. Refer to the following link for the reflow soldering profile for Cypress products. http://www.cypress.com/?rID=51561|
|Electrostatic discharge voltage (Human Body Model)||3500 V||2000 V||The FM24V02A part is designed as per Cypress ESD spec which follows JEDEC standard as described in the ESD tutorial published by Cypress: http://www.cypress.com/?docID=35736
The ESD tolerance limit of the FM24V02A device is a safe limit for the components per JEDEC standard. Therefore, lower ESD tolerance of FM24V02A does not impact the Electrostatic discharge system level ESD performance.
|Electrostatic discharge voltage (Charged Device Model)||1250 V||500 V|
|Output LOW voltage (for VOL = 0.2 V, max)||IOL = 150 μA for VDD ≥ 2.0 V||-||FM24V02A provides better spec.|
|Output LOW voltage (for VOL = 0.4 V, max)||IOL = 2 mA for VDD ≥ 2.7 V||IOL = 2 mA for VDD ≥ 2.0 V|
|Output LOW voltage (for VOL = 0.6 V, max)||IOL = 6 mA for VDD ≥ 2.0 V||-||FM24V02A provides this additional spec to meet the NXP I2C specification.|
|Data in hold (tHD:DAT), Max @ 3.4 MHz I2C||-||70 ns|
|Input rise time (tR), Min @ 3.4 MHz I2C||-||10 ns|
|Input fall time (tF), Min @ 3.4 MHz I2C||-||10 ns|
|Input fall time (tF), Min @ 1.0 MHz I2C||-||20 * (VDD / 5.5 V)|
|ACK output valid time (tVD:ACK)||-||Specified, meets NXP I2C spec|
|Output fall time from VIH min to VIL max||-||Specified, meets NXP I2C spec|
|Power-up VDD (min) to first access (START condition)||250 μs||1000 μs||First access from power up time must be adjusted to 1000μs, if the system can boot up faster than 1000μs.|