The PCA9561 is a 20-pin CMOS device consisting of four 6-bit non-volatile EEPROM registers, 6 hardware pin inputs and a 6-bit multiplexed output. It is used for DIP switch-free or jumper-less system configuration and supports Mobile and Desktop VID Configuration, where 5 preset values (4 sets of internal non-volatile registers and 1 set of external hardware pins) set processor voltage for operation in various performance or battery conservation sleep modes. The PCA9561 is also useful in server and telecom/networking applications when used to replace DIP switches or jumpers, since the settings can be easily changed via I2C/SMBus without having to power down the equipment to open the cabinet. The non-volatile memory retains the most current setting selected before the power is turned off.
The PCA9561 typically resides between the CPU and Voltage Regulator Module (VRM) when used for CPU VID (Voltage IDentification code) configuration. It is used to bypass the CPU-defined VID values and provide a different set of VID values to the VRM, if an increase in the CPU voltage is desired. An increase in CPU voltage combined with an increase in CPU frequency leads to a performance boost of up to 7.5 pct. Lower CPU voltage reduces power consumption. The main advantage of the PCA9561 over older devices, such as the PCA9559 or PCA9560, is that it contains four internal non-volatile EEPROM registers instead of just one or two, allowing five independent settings which allows a more accurate CPU voltage tuning depending on specific applications.
The PCA9561 has 2 address pins, allowing up to 4 devices to be placed on the same I2C-bus or SMBus.
| Type number | Orderable part number | Ordering code (12NC) | Product status | Package | Packing | Marking | ECCN |
|---|---|---|---|---|---|---|---|
| PCA9561D | PCA9561D,112 | 9352 717 16112 | Volume production | SOT163 | Tube | Standard Marking | |
| PCA9561D | PCA9561D,118 | 9352 717 16118 | Volume production | SOT163 | Reel Pack, SMD, 13" | Standard Marking | |
| PCA9561PW | PCA9561PW,112 | 9352 717 09112 | Volume production | SOT360 | Tube | Standard Marking | |
| PCA9561PW | PCA9561PW,118 | 9352 717 09118 | Volume production | SOT360 | Reel Pack, SMD, 13" | Standard Marking | |
| PCA9561PW/G | PCA9561PW/G,118 | 9352 788 83118 | Volume production | SOT360 | Reel Pack, SMD, 13" | Standard Marking |
| Type number | Orderable part number | Chemical content | RoHS | Leadfree Conversion date | RHF | IRF (FIT) | MTBF (hours) | MSL |
|---|---|---|---|---|---|---|---|---|
| PCA9561D | PCA9561D,112 | PCA9561D |
| week 5, 2005 | ||||
| PCA9561D | PCA9561D,118 | PCA9561D |
| week 5, 2005 | ||||
| PCA9561PW | PCA9561PW,112 | PCA9561PW |
| week 12, 2005 | ||||
| PCA9561PW | PCA9561PW,118 | PCA9561PW |
| week 12, 2005 | ||||
| PCA9561PW/G | PCA9561PW/G,118 | PCA9561PW_G |
| week 13, 2005 |
| Type number | Ordering code(12NC) | Orderable part number | Indicative price/unit($) | Region | Distributor | In stock | Order quantity | Inventory date | Buy online | Samples |
|---|---|---|---|---|---|---|---|---|---|---|
| PCA9561D | 9352 717 16112 | PCA9561D,112 | 0.8500 | Order samples | ||||||
| PCA9561D | 9352 717 16118 | PCA9561D,118 | 0.8500 | not available | ||||||
| PCA9561PW | 9352 717 09112 | PCA9561PW,112 | 0.8500 | NA | ARROW ELECTRONICS | 1,348 | 11/19/2009 | Buy online | not available | |
| NA | DIGI-KEY CORPORATION | 1,290 | 11/20/2009 | Buy online | ||||||
| PCA9561PW | 9352 717 09118 | PCA9561PW,118 | 0.8500 | NA | MOUSER ELECTRONICS | 1,368 | 11/20/2009 | Buy online | not available | |
| NA | ARROW ELECTRONICS | 1,348 | 11/19/2009 | Buy online | ||||||
| NA | MOUSER ELECTRONICS | 1,368 | 11/20/2009 | Buy online | ||||||
| NA | FUTURE ELECTRONICS | 200 | 11/19/2009 | Buy online | ||||||
| PCA9561PW/G | 9352 788 83118 | PCA9561PW/G,118 | not available |
Application Notes
Support Documents
| Type number | Package | Operating temp.(Cel) | I²C-bus(kHz) | Operating voltage(VDC) | # of Outputs/Latched Outputs/Internal EEPROM Registers | Max Sink Current per bit(mA) | # of Addresses | Max Sink Current per package(mA) |
|---|---|---|---|---|---|---|---|---|
| PCA9561D | SOT163
| 0~70 | 400 | 3.0~3.6 | 6?0?2 | 25 | 4 | 100 |
| PCA9561PW | SOT360
| 0~70 | 400 | 3.0~3.6 | 6?0?2 | 25 | 4 | 100 |
| PCA9561PW/G | SOT360
| 0~70 | 400 | 3.0~3.6 | 6?0?2 | 25 | 4 | 100 |
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