PCA9671DK,118 NXP Semiconductors, PCA9671DK,118 Datasheet - Page 16

• Manufacturer Part Number: PCA9671DK,118
• Description: IC I/O EXPANDER I2C 16B 24QSOP
• Manufacturer: NXP Semiconductors

Specifications of PCA9671DK,118

• Interface: I²C
• Number Of I /o: 16
• Interrupt Output: No
• Frequency - Clock: 1MHz
• Voltage - Supply: 2.3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-QSOP
• Includes: POR
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 568-4191-2; 935283553118; PCA9671DK-T

NXP Semiconductors
9. Characteristics of the I
PCA9671
Product data sheet
9.1.1 START and STOP conditions
8.4 Power-on reset
8.5 RESET input
9.1 Bit transfer
When power is applied to V
a reset condition until V
and the PCA9671 registers and I
states. Thereafter V
A reset can be accomplished by holding the RESET pin LOW for a minimum of t
PCA9671 registers and I
RESET input is once again HIGH.
The I
lines are a serial data line (SDA) and a serial clock line (SCL). Both lines must be
connected to a positive supply via a pull-up resistor when connected to the output stages
of a device. Data transfer may be initiated only when the bus is not busy.
One data bit is transferred during each clock pulse. The data on the SDA line must remain
stable during the HIGH period of the clock pulse as changes in the data line at this time
will be interpreted as control signals (see
Both data and clock lines remain HIGH when the bus is not busy. A HIGH-to-LOW
transition of the data line while the clock is HIGH is defined as the START condition (S). A
LOW-to-HIGH transition of the data line while the clock is HIGH is defined as the STOP
condition (P) (see
Fig 19. Bit transfer
2
C-bus is for 2-way, 2-line communication between different ICs or modules. The two
All information provided in this document is subject to legal disclaimers.
2
SDA
SCL
Figure
C-bus
DD
must be lowered below 0.2 V to reset the device.
DD
Rev. 2 — 29 July 2010
2
20).
C-bus state machine will be held in their default state until the
has reached V
DD
, an internal Power-On Reset (POR) holds the PCA9671 in
Remote 16-bit I/O expander for Fm+ I
2
C-bus/SMBus state machine will initialize to their default
data valid
data line
stable;
POR
Figure
. At that point, the reset condition is released
allowed
change
of data
19).
mba607
PCA9671
© NXP B.V. 2010. All rights reserved.
2
C-bus with reset
w(rst)
16 of 35
. The