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PCA9540B
Datasheet
General description
The PCA9540B is a 1-of-2 bi-directional translating multiplexer, controlled via the I2C-bus. The SCL/SDA upstream pair fans out to two SCx/SDx downstream pairs, or channels. Only one SCx/SDx channel is selected at a time, determined by the contents of the programmable control register.
A power-on reset function puts the registers in their default state and initializes the I2C state machine with no channels selected.
The pass gates of the multiplexer are constructed such that the VDD pin can be used to limit the maximum high voltage which will be passed by the PCA9540B. This allows the use of different bus voltages on each SCx/SDx pair, so that 1.8 V, 2.5, or 3.3 V parts can communicate with 5 V parts without any additional protection. External pull-up resistors can pull the bus up to the desired voltage level for this channel. All I/O pins are 5 V tolerant.
The PCA9540B has replaced the PCA9540 and all designs must migrate to the PCA9540B. PCA9540B samples can be requested from www.philipslogic.com/products/I2Cmuxes/.
Features
- 1-of-2 bi-directional translating multiplexer
- I2C interface logic; compatible with SMBus standards
- Channel selection via I2C-bus
- Power up with all multiplexer channels deselected
- Low RdsON switches
- Allows voltage level translation between 1.8 V, 2.5 V, 3.3 V and 5 V buses
- No glitch on power-up
- Supports hot insertion
- Low stand-by current
- Operating power supply voltage range of 2.3 V to 5.5 V
- 5 V tolerant Inputs
- 0 to 400 kHz clock frequency
- ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V MM per JESD22-A115 and 1000 V per JESD22-C101
- Latch-up testing is done to JESDEC Standard JESD78 which exceeds 100 mA
- Packages Offered: SO8, TSSOP8
Products/packages
| Type number | North American Type number | Ordering code (12NC) | Product status | Package | Packing | Marking | Chemical content | Leadfree conversion date |
|---|---|---|---|---|---|---|---|---|
| PCA9540BD | PCA9540BD | 9352 760 35112 | Volume production | SOT96-1
(SO8) | Tube | Standard Marking | PCA9540BD
| week 5, 2005 |
| PCA9540BD | PCA9540BD-T | 9352 760 35118 | Volume production | SOT96-1
(SO8) | Tape reel smd | Standard Marking | PCA9540BD
| week 5, 2005 |
| PCA9540BDP | PCA9540BDP-T | 9352 760 36118 | Volume production | SOT505-1
(TSSOP8) | Reel Pack, SMD, 13" | Standard Marking | PCA9540BDP
| week 12, 2005 |
Pricing/ordering/availability
| Type number | Ordering code(12NC) | Indicative price/unit($) | Region | Distributor | In stock | Inventory date | Buy online | Samples |
|---|---|---|---|---|---|---|---|---|
| PCA9540BD | 9352 760 35112 | 0.8900 | NA | ARROW ELECTRONICS | 2,964 | 7/18/2008 | Buy online | not available |
| NA | AVNET ELECTRONICS MARKETING | 2,567 | 7/17/2008 | Buy online | ||||
| NA | DIGI-KEY CORPORATION | 1,187 | 7/18/2008 | Buy online | ||||
| PCA9540BD | 9352 760 35118 | 0.8900 | NA | DIGI-KEY CORPORATION | 2,500 | 7/18/2008 | Buy online | Order samples |
| NA | ARROW ELECTRONICS | 2,500 | 7/18/2008 | Buy online | ||||
| NA | MOUSER ELECTRONICS | 2,177 | 7/16/2008 | Buy online | ||||
| NA | DIGI-KEY CORPORATION | 1,425 | 7/18/2008 | Buy online | ||||
| PCA9540BDP | 9352 760 36118 | 0.8900 | NA | FUTURE ELECTRONICS | 15,000 | 7/18/2008 | Buy online | Order samples |
| NA | AVNET ELECTRONICS MARKETING | 4,935 | 7/17/2008 | Buy online | ||||
| NA | DIGI-KEY CORPORATION | 2,698 | 7/18/2008 | Buy online | ||||
| NA | DIGI-KEY CORPORATION | 2,500 | 7/18/2008 | Buy online | ||||
| NA | MOUSER ELECTRONICS | 1,817 | 7/16/2008 | Buy online |
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
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)
UM10204_3;
I2C-bus specification and user manual (26-Jun-07)
Parametrics/similar products
| Type number | Package | Operating temp.(Cel) | I²C-bus(kHz) | Operating voltage(VDC) | Inputs | Outputs | # of Addresses |
|---|---|---|---|---|---|---|---|
| PCA9540BD | SOT96-1
(SO8) | -40~85 | 400 | 2.3~5.5 | 1 | 2 | 1 |
| PCA9540BDP | SOT505-1
(TSSOP8) | -40~85 | 400 | 2.3~5.5 | 1 | 2 | 1 |
Similar products
PCA9540B 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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