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PCA9561
Datasheet
General description
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.
Features
- 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
- 4 internal non-volatile registers
- Internal non-volatile registers programmable and readable via I2C-bus
- 6 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
- 2 address pins, allowing up to 4 devices on the I2C-bus
- MUX_IN values readable via I2C-bus
- ESD protection exceeds 200 V HBM per JESD22-A114, 200 V MM per JESD22-A115, and 1000 V CDM per JESD22-C101
- Latch-up testing is done to JESDEC Standard JESD78 which exceeds 100 mA.
Products/packages
| Type number | North American Type number | Ordering code (12NC) | Product status | Package | Packing | Marking | Chemical content | Leadfree conversion date |
|---|---|---|---|---|---|---|---|---|
| PCA9561D | PCA9561D | 9352 717 16112 | Volume production | SOT163-1
(SO20) | Tube | Standard Marking | PCA9561D
| week 5, 2005 |
| PCA9561D | PCA9561D-T | 9352 717 16118 | Volume production | SOT163-1
(SO20) | Tape reel smd | Standard Marking | PCA9561D
| week 5, 2005 |
| PCA9561PW | PCA9561PW | 9352 717 09112 | Volume production | SOT360-1
(TSSOP20) | Tube | Standard Marking | PCA9561PW
| week 12, 2005 |
| PCA9561PW | PCA9561PW-T | 9352 717 09118 | Volume production | SOT360-1
(TSSOP20) | Reel Pack, SMD, 13" | Standard Marking | PCA9561PW
| week 12, 2005 |
Pricing/ordering/availability
| Type number | Ordering code(12NC) | Indicative price/unit($) | Region | Distributor | In stock | Inventory date | Buy online | Samples |
|---|---|---|---|---|---|---|---|---|
| PCA9561D | 9352 717 16112 | 0.8500 | Order samples | |||||
| PCA9561D | 9352 717 16118 | 0.8500 | not available | |||||
| PCA9561PW | 9352 717 09112 | 0.8500 | NA | ARROW ELECTRONICS | 1,650 | 9/5/2008 | Buy online | not available |
| NA | DIGI-KEY CORPORATION | 848 | 9/6/2008 | Buy online | ||||
| PCA9561PW | 9352 717 09118 | 0.8500 | not available |
Applications
Related applications
LCD display - discretes focus
PDA - discretes focus
Motherboard components
50-60 Hz CRT integrated DTV (TV210D)
Mid-range integrated DTV (TV810)
Intelligent washing machine
Technical documents
Application Notes
AN10146_02;
I2C 2002-1A Evaluation Board (26-Feb-03)
AN10216_1;
I2C manual (27-Mar-03)
Support Documents
75013239;
I 2 C Logic Selection Guide (2005-01-12)
75011212;
I2C 2002-1A Evaluation Board Kit (01-Mar-03)
75012744;
I2C Bus Solutions 2004 (2004-02-01)
philips_i2c_handbook;
I2C Handbook (2004-01-01)
39340011_21;
I2C-bus specification (version 2.1) (2000-01-01)
UM10204_3;
I2C-bus specification and user manual (26-Jun-07)
pca9561;
IBIS model of PCA9561 Quad 6-bit multiplexed I2C EEPROM 20-pin SO and TSSOP Packages (2001-08-27)
75016189;
NXP I (2008-06-01)
75016531;
NXP I (2008-07-01)
75010651;
PCA9560/9561 (2002-12-19)
Parametrics/similar products
| 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 | SOT163-1
(SO20) | 0~70 | 400 | 3.0~3.6 |
6 0 2 | 25 | 4 | 100 |
| PCA9561PW | SOT360-1
(TSSOP20) | 0~70 | 400 | 3.0~3.6 |
6 0 2 | 25 | 4 | 100 |
Similar products
PCA9561 links to the similar products page containing an overview of products that are similar in function or related to the type number(s) as listed on this page. The similar products page includes products from the same catalog tree(s), relevant selection guides and products from the same functional category.
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