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TCA6416APWR датащи(PDF) 2 Page - Texas Instruments

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номер детали TCA6416APWR
подробное описание детали  LOW-VOLTAGE 16-BIT I2C AND SMBus I/O EXPANDER WITH INTERRUPT OUTPUT, RESET, AND CONFIGURATION REGISTERS
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производитель  TI [Texas Instruments]
домашняя страница  http://www.ti.com
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DESCRIPTION/ORDERING INFORMATION
TCA6416A
SCPS194 – MAY 2009 ....................................................................................................................................................................................................... www.ti.com
This 16-bit I/O expander for the two-line bidirectional bus (I2C) is designed to provide general-purpose remote I/O
expansion for most microcontroller families via the I2C interface [serial clock (SCL) and serial data (SDA)].
The major benefit of this device is its wide VCC range. It can operate from 1.65 V to 5.5 V on the P-port side and
on the SDA/SCL side. This allows the TCA6416AA to interface with next-generation microprocessors and
microcontrollers on the SDA/SCL side, where supply levels are dropping down to conserve power. In contrast to
the dropping power supplies of microprocessors and microcontrollers, some PCB components, such as LEDs,
remain at a 5-V power supply.
The bidirectional voltage level translation in the TCA6416A is provided through VCCI. VCCI should be connected to
the VCC of the external SCL/SDA lines. This indicates the VCC level of the I
2C bus to the TCA6416A. The voltage
level on the P-port of the TCA6416A is determined by the VCCP.
The TCA6416A consists of two 8-bit Configuration (input or output selection), Input, Output, and Polarity
Inversion (active high) 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 or output 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 TCA6416A 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 depowering the part.
The TCA6416A 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.
INT can be connected to the interrupt input of a 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. Thus, the TCA6416A can remain a simple slave device.
The device P-port outputs have high-current sink capabilities for directly driving LEDs while consuming low
device current.
One hardware pin (ADDR) can be used to program and vary the fixed I2C address and allow up to two devices to
share the same I2C bus or SMBus.
ORDERING INFORMATION
TA
PACKAGE(1)(2)
ORDERABLE PART NUMBER
TOP-SIDE MARKING
BGA – ZQS (Pb-free)
Reel of 2500
TCA6416AZQSR
PH416
–40°C to 85°C
QFN – RTW
Reel of 3000
TCA6416ARTWR
PH416
TSSOP – PW
Reel of 2000
TCA6416APWR
PH416
(1)
Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.
(2)
For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
website at www.ti.com.
ZQS Package Terminal Assignments
E
P13
P11
P10
GND
P06
D
P15
P14
P12
P07
P05
C
P16
P17
P01
P04
P03
B
ADDR
VCCP
VCCI
NB
P02
A
SCL
SDA
INT
RESET
P00
5
4
3
2
1
2
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Copyright © 2009, Texas Instruments Incorporated
Product Folder Link(s): TCA6416A


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