PCA9561PW
Quad 6-bit multiplexed I2C EEPROM DIP switch
Quick ordering
DistributorIn Stock
OR:
The PCA9561 is a 20-pin CMOS device consisting of four 6-bit non-volatile EEPROM registers, six 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 five preset values (four sets of internal non-volatile registers and one 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 telecommunications/networking applications when used to replace DIP switches or jumpers, since the settings can be easily changed via I²C-bus/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 %. 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 two address pins, allowing up to four devices to be placed on the same I²C-bus or SMBus.
Features and benefits
- Selection of non-volatile register_n as source to MUX_OUT pins via I²C-bus
- I²C-bus can override MUX_SELECT pin in selecting output source
- 6-bit 5-to-1 multiplexer DIP switch
- Four internal non-volatile registers
- Internal non-volatile registers programmable and readable via I²C-bus
- Six open-drain multiplexed outputs
- 400 kHz maximum clock frequency
- Operating supply voltage 3.0 V to 3.6 V
- 5 V and 2.5 V tolerant inputs/outputs
- Useful for Speed Step configuration of laptop computer
- Two address pins, allowing up to four devices on the I²C-bus
- MUX_IN values readable via I²C-bus
- ESD protection exceeds 200 V HBM per JESD22-A114 and 1000 V CDM per JESD22-C101
- Latch-up testing is done to JESDEC Standard JESD78 which exceeds 100 mA
- Series PCA9561
Quad 6-bit multiplexed I²C-bus EEPROM DIP switch
- Parametric search all I2C DIP switch
All information on this product information page is subject to the subsequent disclaimers:
Parametrics of this product
| Type number | Package | 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) | Operating Temperature(Cel) |
|---|---|---|---|---|---|---|---|---|
| PCA9561PW | SOT360-1 (TSSOP20) | 400 | 3.0~3.6 | 6?0?2 | 25 | 4 | 100 | 0~70 |
Similar products
- Series PCA9561
- Parametric search all I<sup>2</sup>C DIP switch
- Parametrics series
Package
| Type number | Orderable part number | Ordering code (12NC) | Product status | Package | Packing | Marking |
|---|---|---|---|---|---|---|
| PCA9561PW | PCA9561PW,112 | 9352 717 09112 | Volume production | SOT360-1 (TSSOP20) | Tube | PCA9561 |
| PCA9561PW | PCA9561PW,118 | 9352 717 09118 | Volume production | SOT360-1 (TSSOP20) | Reel Pack, SMD, 13" | PCA9561 |
Outline drawing
| Package Version | Package Name | Package Description | Reference Codes | Issue Date |
|---|---|---|---|---|
| SOT360-1 | TSSOP20 | plastic thin shrink small outline package; 20 leads; body width 4.4 mm | MO-153 (JEDEC); | 2003-02-19 |
Quality, reliability & chemical content
| Type number | Orderable part number | Chemical content | RoHS | Leadfree conversion date | RHF | IFR (FIT) | MTBF (hours) | MSL | MSL LF |
|---|---|---|---|---|---|---|---|---|---|
| PCA9561PW | PCA9561PW,112 | PCA9561PW |  | week 12, 2005 |  | 2.0 | 5.0E8 | 1 | 1 |
| PCA9561PW | PCA9561PW,118 | PCA9561PW | | week 12, 2005 | | 2.0 | 5.0E8 | 1 | 1 |
Documentation for this product
| File name | Title | Type | Format | Date |
|---|---|---|---|---|
| PCA9561 | Quad 6-bit multiplexed I2C-bus EEPROM DIP switch | Data sheet | 2012-11-06 | |
| AN10441 | Level shifting techniques in I2C-bus design | Application note | 2007-06-20 | |
| AN10216 | I2C manual | Application note | 2003-03-27 | |
| AN10146 | I2C 2002-1A Evaluation Board | Application note | 2003-02-26 | |
| AN250 | PCA8550 4-bit multiplexed/1-bit latched 5-bit I2C EEPROM | Application note | 1998-10-01 | |
| 75016531 | Evaluate the I2C-bus with a comprehensive kit; NXP I2C 2002-1A evaluation board kits OM6285 and OM6278 | Leaflet | 2008-07-01 | |
| 75017424 | NXP I2C-bus solutions 2013: Smart, simple solutions for the 12 most common design concerns | Leaflet | 2013-05-23 | |
| design_con_2003_tecforum_i2c_bus_overview | DesignCon 2003 TecForum I 2 C Bus Overview | Other type | 2003-01-27 | |
| UM10204_v5 | I2C-bus specification and user manual | Other type | 2013-06-03 | |
| UM10204 | I2C-bus specification and user manual | User manual | 2007-06-26 | |
| UM10206 | I2C Demonstration Board 2005-1 Quick Start Guide | User manual | 2006-06-13 | |
| UM10204_JA | I2C-bus specification and user manual | User manual | 2013-04-03 |
Support links
- IBIS and HSPICE Model (standardics.nxp.com/support/tools/)
Ordering & availability
Sample
Sample orders normally take 2-4 days for delivery.
If you do not have a direct account with NXP our network of global and regional distributors is available and equipped to support you with NXP samples. As a NXP customer you also have the option to order samples via our sales organisation.
Technical support
Do you want to ask technical questions to an NXP expert?
Please select one of the following options:
Follow us