TCA9539_15 Datasheet, PDF (1/42 Pages) Texas Instruments – Low Voltage 16-Bit I2C and SMBus Low-Power I/O Expander

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TCA9539
SCPS202B – OCTOBER 2009 – REVISED OCTOBER 2015
TCA9539 Low Voltage 16-Bit I²C and SMBus Low-Power I/O Expander with Interrupt
Output, Reset pin, and Configuration Registers
1 Features
•1 I²C to Parallel Port Expander
• Low Standby-Current Consumption of 3 μA Max
• Open-Drain Active-Low Interrupt Output
• Active-Low Reset Input
• 5-V Tolerant I/O Ports
• Compatible With Most Microcontrollers
• 400-kHz Fast I²C Bus
• Input/Output Configuration Register
• Polarity Inversion Register
• Internal Power-on Reset
• No Glitch on Power Up
• Noise Filter on SCL/SDA Inputs
• Address by Two Hardware Address Pins for Use
of up to Four 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 (A114-A)
– 1000-V Charged-Device Model (C101)
2 Applications
• Servers
• Routers (Telecom Switching Equipment)
• Personal Computers, smartphones
• Industrial Automation
• Automotive infotainment, Advanced Driver
Assistance Systems (ADAS)
• I²C GPIO Expansion
3 Description
The TCA9539 is a 24-pin device that provides 16 bits
of general purpose parallel input/output (I/O)
expansion for the two-line bidirectional I²C bus (or
SMBus protocol). The device can operate with a
power supply voltage (V_CC) range from 1.65 V to 5.5
V. The device supports 100-kHz (I²C Standard mode)
and 400-kHz (I²C Fast mode) clock frequencies. I/O
expanders such as the TCA9539 provide a simple
solution when additional I/Os are needed for
switches, sensors, push-buttons, LEDs, fans, and
other similar devices.
The features of the TCA9539 include an interrupt that
is generated on the INT pin whenever an input port
changes state. The A0 and A1 hardware selectable
address pins allow up to four TCA9539 devices on
the same I²C bus. The device can be reset to its
default state by cycling the power supply and causing
a power-on-reset. Also, the TCA9539 has a hardware
RESET pin that can be used to reset the device to its
default state.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TSSOP (24)
7.80 mm × 4.40 mm
TCA9539
WQFN (24)
4.00 mm × 4.00 mm
VQFN (24)
4.00 mm × 4.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
I2C or SMBus
Master
(e.g. Processor)
SDA
SCL
VCC
INT
P0
P1
RESET _TCA9539
A0
P15
A1
GND
Peripheral
Devices
x /RESET,
ENABLE,
or control
inputs
x /INT or
status
outputs
x 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.