© Semiconductor Components Industries, LLC, 2015
March, 2017 − Rev. 3
1 Publication Order Number:
PCA9654E/D
PCA9654E, PCA9654EA
8-bit I/O Expander for I
2
C
Bus and SMBus with
Interrupt
The PCA9654E/PCA9654EA provides 8 bits of General Purpose
parallel Input/Output (GPIO) expansion for I
2
C−bus/SMBus
applications.
The PCA9654E/PCA9654EA consists of 8−bit Configuration
(Input or Output selection), Input, Output and Polarity Inversion
(active HIGH or active LOW operation) registers. The system master
may set 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 read
register can be inverted with the Polarity Inversion register. All
registers can be read by the system master.
The PCA9654E/PCA9654EA 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. The power−on reset sets the registers to their
default values and initializes the device state machine.
Three hardware pins (AD0, AD1, AD2) vary the fixed I
2
C bus
address and allow up to 64 devices to share the same I
2
C−bus/SMBus.
The PCA9654EA has a different address map from the PCA9654E.
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 3 Address Pins
• 8 I/O Pins which Default to 8 Inputs
• I
2
C SCL Clock Frequencies Supported:
Standard Mode: 100 kHz
Fast Mode: 400 kHz
Fast Mode +: 1 MHz
• ESD Performance: 4000 V Human Body Model,
400 V Machine Model
• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
This document contains information on some products that are still under development.
ON Semiconductor reserves the right to change or discontinue these products without
notice.
SOIC−16
D SUFFIX
CASE 751B
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−16
DT SUFFIX
CASE 948F
WQFN16
MT SUFFIX
CASE 488AP
PCA9654EG
AWLYWW
XXXX = Specific Device Code
A = Assembly Location
M = Date Code / Assembly Location
WL, L = Wafer Lot
Y = Year
WW, W = Work Week
G or G = Pb−Free Package
(Note: Microdot may be in either location)
1
PCA9
654E
ALYWG
G
1
16
1
1
QFN16 3x3
MN SUFFIX
CASE 485G
16
XXXXXX
XXXXXX
ALYWG
G
1
1
QFN16 4x4
MN SUFFIX
CASE 485AP
16
XXXX
XXXX
ALYWG
G
1
1
1
16
16
1
XXMG
G
