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PCA9540B
Datasheet
(Product Specification)
03-Sep-09, 22 pages, 121 kB
General description
The PCA9540B is a 1-of-2 bidirectional 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-bus 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 that 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 V 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.
Features
- 1-of-2 bidirectional translating multiplexer
- I2C-bus interface logic; compatible with SMBus standards
- Channel selection via I2C-bus
- Power up with all multiplexer channels deselected
- Low Ron 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 standby current
- Operating power supply voltage range of 2.3 V to 5.5 V
- 5 V tolerant inputs
- 0 Hz to 400 kHz clock frequency
- ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V MM per JESD2-A115 and 1000 V CDM per JESD22-C101
- Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA
- Packages offered: SO8, TSSOP8, XSON8U
Products/packages
| Type number | Orderable part number | Ordering code (12NC) | Product status | Package | Packing | Marking | ECCN |
|---|---|---|---|---|---|---|---|
| PCA9540BD | PCA9540BD,112 | 9352 760 35112 | Volume production | SOT96 | Tube | Standard Marking | |
| PCA9540BD | PCA9540BD,118 | 9352 760 35118 | Volume production | SOT96 | Reel Pack, SMD, 13" | Standard Marking | |
| PCA9540BDP | PCA9540BDP,118 | 9352 760 36118 | Volume production | SOT505 | Reel Pack, SMD, 13" | Standard Marking | |
| PCA9540BGD | PCA9540BGD,125 | 9352 901 65125 | Volume production | SOT996-2
(XSON8U) | Reel Pack, Reverse, Reverse | Standard Marking |
Quality/reliability/chemical content
| Type number | Orderable part number | Chemical content | RoHS | Leadfree Conversion date | RHF | IRF (FIT) | MTBF (hours) | MSL |
|---|---|---|---|---|---|---|---|---|
| PCA9540BD | PCA9540BD,112 | PCA9540BD |
| week 5, 2005 | ||||
| PCA9540BD | PCA9540BD,118 | PCA9540BD |
| week 5, 2005 | ||||
| PCA9540BDP | PCA9540BDP,118 | PCA9540BDP |
| week 12, 2005 | ||||
| PCA9540BGD | PCA9540BGD,125 | PCA9540BGD |
| Always Pb-free |
Pricing/ordering/availability
| Type number | Ordering code(12NC) | Orderable part number | Indicative price/unit($) | Region | Distributor | In stock | Order quantity | Inventory date | Buy online | Samples |
|---|---|---|---|---|---|---|---|---|---|---|
| PCA9540BD | 9352 760 35112 | PCA9540BD,112 | 0.8900 | NA | DIGI-KEY CORPORATION | 362 | 11/7/2009 | Buy online | not available | |
| NA | FUTURE ELECTRONICS | 1,990 | 11/7/2009 | Buy online | ||||||
| NA | AVNET ELECTRONICS MARKETING | 900 | 11/7/2009 | Buy online | ||||||
| PCA9540BD | 9352 760 35118 | PCA9540BD,118 | 0.8900 | NA | DIGI-KEY CORPORATION | 2,297 | 11/7/2009 | Buy online | Order samples | |
| NA | MOUSER ELECTRONICS | 1,650 | 11/7/2009 | Buy online | ||||||
| NA | FUTURE ELECTRONICS | 2,500 | 11/7/2009 | Buy online | ||||||
| PCA9540BDP | 9352 760 36118 | PCA9540BDP,118 | 0.8900 | NA | FUTURE ELECTRONICS | 1,740 | 11/7/2009 | Buy online | Order samples | |
| NA | AVNET ELECTRONICS MARKETING | 2,370 | 11/7/2009 | Buy online | ||||||
| PCA9540BGD | 9352 901 65125 | PCA9540BGD,125 | Order samples |
Design support
Application Notes
Support Documents
UM10204_3;
I2C-bus specification and user manual (2007-06-26)