© Semiconductor Components Industries, LLC, 2016
March, 2017 − Rev. 5
1 Publication Order Number:
PCA9655E/D
PCA9655E
Remote 16-bit I/O Expander
for I
2
C Bus with Interrupt
The PCA9655E provides 16 bits of General Purpose parallel Input /
Output (GPIO) expansion through the I
2
C−bus / SMBus.
The PCA9655E consists of two 8−bit Configuration (Input or
Output selection); Input, Output and Polarity Inversion (active−HIGH
or active−LOW operation) registers. At power on, all I/Os default to
inputs. Each I/O may be configured as either input or output by writing
to its corresponding I/O configuration bit. The data for each Input or
Output is kept in its corresponding Input or Output register. The
Polarity Inversion register may be used to invert the polarity of the
read register. All registers can be read by the system master.
The PCA9655E provides an open−drain interrupt output which is
activated when any input state differs from its corresponding input
port register state. The interrupt output is used to indicate to the system
master that an input state has changed. The power−on reset sets the
registers to their default values and initializes the device state
machine.
Three hardware pins (AD0, AD1, AD2) are used to configure the
I
2
C−bus slave address of the device. Up to 64 devices are allowed to
share the same I
2
C−bus / SMBus.
Features
• V
DD
Operating Range: 1.65 V to 5.5 V
• SDA Sink Capability: 30 mA
• 5.5 V Tolerant I/Os
• Polarity Inversion Register
• Active LOW Interrupt Output
• Low Standby Current
• Noise Filter on SCL/SDA Inputs
• No Glitch on Power−up
• Internal Power−on Reset
• 64 Programmable Slave Addresses Using Three Address Pins
• 16 I/O Pins Which Default to 16 Inputs
• I
2
C SCL Clock Frequencies Supported:
Standard Mode: 100 kHz
Fast Mode: 400 kHz
Fast Mode +: 1 MHz
• ESD Performance: 2000 V Human Body Model,
200 V Machine Model
• These are Pb−Free Devices
SOIC−24
DW SUFFIX
CASE 751E
See detailed ordering and shipping information in the package
dimensions section on page 17 of this data sheet.
ORDERING INFORMATION
MARKING
DIAGRAMS
www.onsemi.com
TSSOP−24
DT SUFFIX
CASE 948H
1
WQFN24
MT SUFFIX
CASE 485BG
PCA
9655E
ALYWG
G
PCA96
55EG
ALYW
PCA9655E
AWLYYWWG
XXXX = Specific Device Code
A = Assembly Location
WL, L = Wafer Lot
YY, Y = Year
WW, W = Work Week
G or G = Pb−Free Package
(Note: Microdot may be in either location)
