PCF8575C_15 Datasheet, PDF (1/38 Pages) Texas Instruments – SMBus Low-Power I/O Expander

Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
PCF8575C
SCPS123F – MARCH 2005 – REVISED JANUARY 2015
PCF8575C Remote 16-Bit I²C AND SMBus Low-Power I/O Expander
with Interrupt Output
1 Features
•1 I²C to Parallel-Port Expander
• Open-Drain Interrupt Output
• Low Standby-Current Consumption of
10 μA Maximum
• Compatible With Most Microcontrollers
• 400-kHz Fast I²C Bus
• Address by Three Hardware Address Pins for Use
of up to Eight Devices
• Latched Outputs With High-Current Drive
Capability for Directly Driving LEDs
• Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
• ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model
– 200-V Machine Model
– 1000-V Charged-Device Model
2 Applications
• Telecom Shelters: Filter Units
• Servers
• Routers (Telecom Switching Equipment)
• Personal Computers
• Personal Electronics
• Industrial Automation
• Products with GPIO-Limited Processors
3 Description
This 16-bit I/O expander for the two-line bidirectional
bus (I²C) is designed for 4.5-V to 5.5-V V_CC
operation.
The PCF8575C provides general-purpose remote I/O
expansion for most microcontroller families via the I²C
interface serial clock (SCL) and serial data (SDA).
The device features a 16-bit quasi-bidirectional
input/output (I/O) port (P07–P00, P17–P10), including
latched outputs with high-current drive capability for
directly driving LEDs. Each quasi-bidirectional I/O can
be used as an input or output without the use of a
data-direction control signal. At power on, the I/Os
are in 3-state mode. The strong pullup to V_CC allows
fast-rising edges into heavily loaded outputs. This
device turns on when an output is written high and is
switched off by the negative edge of SCL. The I/Os
should be high before being used as inputs. After
power on, as all the I/Os are set to 3-state, all of them
can be used as inputs. Any change in setting of the
I/Os as either inputs or outputs can be done with the
write mode. If a high is applied externally to an I/O
that has been written earlier to low, a large current
(I_OL) flows to GND.
Device Information⁽¹⁾
PART NUMBER PACKAGE (PIN)
BODY SIZE
SSOP (24)
8.20 mm × 5.30 mm
QSOP (24)
8.65 mm × 3.90
PCF8575C
TVSOP (24)
SOIC (24)
5.00 mm × 4.50 mm
15.40 mm × 7.50 mm
TSSOP (24)
7.80 mm × 4.40 mm
QFN (24)
4.0 mm × 4.0 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
I2C or SMBus Master
(e.g. Processor)
VCC
SDA
SCL
P00
INT
P01
P02
P03
P04
A0
P05
A1
P06
A2
P07
GND
PCF8575C
P10
P11
P12
P13
P14
P15
P16
P17
Peripheral Devices
RESET, ENABLE,
or control inputs
INT or status
outputs
LEDs
Peripheral Devices
RESET, ENABLE,
or control inputs
INT or status
outputs
LEDs
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.