3,260
edits
Changes
→Pinout and detailed pin functions
* From the mechanical standpoint, adoption of LCC outline guarantees a solid and firm mating with carrier board hosting DUL making this product particularly suited for environments where mechanical vibrations are an issue.
* About power supply, two inputs are provided along with status indicators:
** VIN: this is main power supply input. See [[#Pinoutand detailed pin functions|Pinout]] section for more information about voltage range.
** VIN_AUX (available on request): this input is provided to implement a second power supply unit on carrier board (for example based on supercap or battery) that prevents power cut in case main supply experiences a glitch or a power cut. This option is a powerful weapon to face unpredictable power loss and to guarantee data integrity.
** Power rail switch indicator.
** to recover from unexpected power-off
[[File:Dul-ruler.png|thumbnail|center|]]
==Specification==
* Package outline: Leadless Chip Carrier LCC-68 (JEDEC MS004); 9 actual leads per side are implemented
| 9||13||NC||||Reserved for future use||-||Please leave unconnected.
|-
| 10||22||STAT2#||Open-drain output||Status indicator for backup power supply. Pulls down when power is drawn from VIN_AUX rail.||||Can be left open or grounded when not used. When used, it must be pulled-hi.
|-
| 11||23||WARN#||Open-drain output||Overcurrent/thermal warning indicator. Pulls down when either main power supply or backup power supply current exceeds its current limit (4A) or die temperature of internal switch (130°C) is close to thermal shutdown.||||Can be left open or grounded when not used. When used, it must be pulled-hi.
|-
| 12||24||STAT1#||Open-drain output||Status indicator for main power supply. Pulls down when power is drawn from VIN_AUX VIN rail.||||Can be left open or grounded when not used. When used, it must be pulled-hi.
|-
| 13||25||NC||||Reserved for future use||-||Please leave unconnected.