I/O Expander. PCA95380 Datasheet

PCA95380 Expander. Datasheet pdf. Equivalent

Part PCA95380
Description Remote 8-Bit I2C AND SMBus Low-power I/O Expander
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PCA9538
SCPS126F – SEPTEMBER 2006 – REVISED JUNE 2014
PCA9538 Remote 8-Bit I2C AND SMBus Low-power I/O Expander With Interrupt Output,
Reset, and Configuration Registers
1 Features
1 Low Standby Current Consumption of 1 μA Max
• I2C to Parallel Port Expander
• Open-Drain Active-Low Interrupt Output
• Active-Low Reset Input
• Operating Power-Supply Voltage Range of 2.3 V
to 5.5 V
• 5-V Tolerant I/O Ports
• 400-kHz Fast I2C Bus
• Two Hardware Address Pins Allow up to Four
Devices on the I2C/SMBus
• Input/Output Configuration Register
• Polarity Inversion Register
• Power-Up With All Channels Configured as Inputs
• No Glitch on Power Up
• Noise Filter on SCL/SDA Inputs
• Latched Outputs With High-Current Drive
Maximum 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)
– 200-V Machine Model (A115-A)
– 1000-V Charged-Device Model (C101)
2 Description
This 8-bit I/O expander for the two-line bidirectional
bus (I2C) is designed for 2.3-V to 5.5-V VCC
operation. It provides general-purpose remote I/O
expansion for most microcontroller families via the I2C
interface [serial clock (SCL), serial data (SDA)].
The PCA9538 consists of one 8-bit Configuration
(input or output selection), Input Port, Output Port,
and Polarity Inversion (active high or active low)
registers. At power on, the I/Os are configured as
inputs. However, the system master can enable the
I/Os as either inputs or outputs by writing to the I/O
configuration bits. The data for each input or output is
kept in the corresponding Input Port or Output Port
register. The polarity of the Input Port register can be
inverted with the Polarity Inversion register. All
registers can be read by the system master.
The system master can reset the PCA9538 in the
event of a timeout or other improper operation by
asserting a low in the RESET input. The power-on
reset puts the registers in their default state and
initializes the I2C/SMBus state machine. The RESET
pin causes the same reset/initialization to occur
without powering down the part.
The PCA9538 open-drain interrupt (INT) output is
activated when any input state differs from its
corresponding Input Port register state and is used to
indicate to the system master that an input state has
changed.
PART NUMBER
TCA6424
Device Information(1)
PACKAGE
BODY SIZE (NOM)
SSOP (16)
6.20 mm × 5.30 mm
TVSOP (16)
3.60 mm × 4.40 mm
SOIC (16)
10.30 mm 7.50 mm
TSSOP (16)
5.00 mm × 4.40 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
DB, DBQ, DGV, DW, OR PW PACKAGE
(TOP VIEW)
RGV PACKAGE
(TOP VIEW)
RGT PACKAGE
(TOP VIEW)
A0
A1
RESET
P0
P1
P2
P3
GND
1
2
3
4
5
6
7
8
16 VCC
15 SDA
14 SCL
13 INT
12 P7
11 P6
10 P5
9 P4
16 15 14 13
RESET 1
12 SCL
P0 2
11 INT
P1 3
10 P7
P2 4
9 P6
567 8
RESET
P0
P1
P2
16 15 14 13
1 12
2 11
3 10
49
567 8
SCL
INT
P7
P6
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.



PCA95380
PCA9538
SCPS126F – SEPTEMBER 2006 – REVISED JUNE 2014
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Description ............................................................. 1
3 Revision History..................................................... 2
4 Description (Continued) ........................................ 3
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ..................................... 4
6.2 Handling Ratings....................................................... 4
6.3 Recommended Operating Conditions....................... 4
6.4 Electrical Characteristics........................................... 5
6.5 I2C Interface Timing Requirements........................... 6
6.6 RESET Timing Requirements................................... 6
6.7 Switching Characteristics .......................................... 6
6.8 Typical Characteristics .............................................. 7
7 Parameter Measurement Information ................ 10
8 Detailed Description ............................................ 14
8.1 Functional Block Diagram ....................................... 14
8.2 Device Functional Modes........................................ 16
8.3 Programming........................................................... 17
9 Application And Implementation........................ 24
9.1 Typical Application ................................................. 24
10 Power Supply Recommendations ..................... 26
10.1 Power-On Reset Errata......................................... 26
11 Device and Documentation Support ................. 27
11.1 Trademarks ........................................................... 27
11.2 Electrostatic Discharge Caution ............................ 27
11.3 Glossary ................................................................ 27
12 Mechanical, Packaging, and Orderable
Information ........................................................... 27
3 Revision History
Changes from Revision E (September 2008) to Revision F
Page
• Added RESET Errata section. .............................................................................................................................................. 16
• Added Interrupt Errata section ............................................................................................................................................. 17
• Power-On Reset Errata section............................................................................................................................................ 26
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