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PCF8575
Datasheet
General description
The PCF8575 is a silicon CMOS circuit. It provides general purpose remote I/O expansion for most microcontroller families via the two-line bidirectional bus (I²C-bus).
The device consists of a 16-bit quasi-bidirectional port and an I²C-bus interface. The PCF8575 has a low current consumption and includes latched outputs with high current drive capability for directly driving LEDs. It also possesses an interrupt line (INT) which can be connected to the interrupt logic of the microcontroller. By sending an interrupt signal on this line, the remote I/O can inform the microcontroller if there is incoming data on its ports without having to communicate via the I²C-bus. This means that the PCF8575 is an I²C-bus slave transmitter/receiver.
Every data transmission from the PCF8575 must consist of an even number of bytes, the first byte will be referred to as P07 to P00 and the second byte as P17 to P10. The third will be referred to as P07 to P00 and so on.
Features
- Operating supply voltage 2.5 to 5.5 V
- Low standby current consumption of 10 µA maximum
- I²C-bus to parallel port expander
- 400 kbits/s FAST I²C-bus
- Open-drain interrupt output
- 16-bit remote I/O port for the I²C-bus
- Compatible with most microcontrollers
- Latched outputs with high current drive capability for directly driving LEDs
- Address by 3 hardware address pins for use of up to 8 devices
- SSOP24 package.
Products/packages
| Type number | North American Type number | Ordering code (12NC) | Product status | Package | Packing | Marking | Chemical content | Leadfree conversion date |
|---|---|---|---|---|---|---|---|---|
| PCF8575TS/1 | PCF8575TSDB | 9352 765 52112 | Volume production | SOT340-1
(SSOP24) | Tube | Standard Marking | PCF8575TS/1
| Always Pb-free |
| PCF8575TS/1 | PCF8575TSDB-T | 9352 765 52118 | Volume production | SOT340-1
(SSOP24) | Reel Pack, SMD, 13" | Standard Marking | PCF8575TS/1
| Always Pb-free |
Pricing/ordering/availability
| Type number | Ordering code(12NC) | Indicative price/unit($) | Region | Distributor | In stock | Inventory date | Buy online | Samples |
|---|---|---|---|---|---|---|---|---|
| PCF8575TS/1 | 9352 765 52112 | 1.8400 | NA | ARROW ELECTRONICS | 4,202 | 7/4/2008 | Buy online | not available |
| NA | FUTURE ELECTRONICS | 3,267 | 7/4/2008 | Buy online | ||||
| NA | DIGI-KEY CORPORATION | 1,147 | 6/29/2008 | Buy online | ||||
| NA | AVNET ELECTRONICS MARKETING | 596 | 7/4/2008 | Buy online | ||||
| NA | MOUSER ELECTRONICS | 473 | 7/6/2008 | Buy online | ||||
| PCF8575TS/1 | 9352 765 52118 | 1.8400 | NA | ARROW ELECTRONICS | 38,000 | 7/4/2008 | Buy online | Order samples |
| NA | DIGI-KEY CORPORATION | 13,000 | 6/29/2008 | Buy online | ||||
| NA | FUTURE ELECTRONICS | 9,000 | 7/4/2008 | Buy online | ||||
| NA | AVNET ELECTRONICS MARKETING | 1,000 | 7/4/2008 | Buy online | ||||
| NA | MOUSER ELECTRONICS | 164 | 7/6/2008 | Buy online | ||||
| NA | DIGI-KEY CORPORATION | 94 | 6/29/2008 | Buy online |
Applications
Related applications
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Set-top box - MMS functionality
Technical documents
Application Notes
AN469_2;
I2C/SMBus general purpose I/O expanders (20-Jan-05)
Support Documents
75011212;
I2C 2002-1A Evaluation Board Kit (01-Mar-03)
UM10204_3;
I2C-bus specification and user manual (26-Jun-07)
75016020;
NXP 8/16-bit I2C/SMBus GPIO expanders PCA9534/35/35C for low-power applications (2007-06-01)
Parametrics/similar products
| Type number | Package | INTERRUPT | Operating temp.(Cel) | # of Bits | Source Current per bit(mA) | I²C-bus(kHz) | Operating voltage(VDC) | Weak Pull-Up Current Source | Max Sink Current per bit(mA) | # of Addresses | Max Sink Current per package(mA) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| PCF8575TS/1 | SOT340-1
(SSOP24) | 0-1 | -40~85 | 16 | 0.1 | 400 | 2.5~6.0 | yes | 20 | 8 | 100 |
Similar products
PCF8575 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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