R2A20150NP Datasheet, PDF (1/11 Pages) Renesas Technology Corp – 8-bit I/O Expander for I2C BUS (Corresponds to Fast mode)

New Product
R2A20150NP/SA
8-bit I/O Expander for I²C BUS (Corresponds to Fast mode)
R03DS0012EJ0100
Rev.1.00
2011.09.05
Description
The R2A20150NP/SA is a CMOS 8-bit I/O expander, which has serial to parallel and parallel to serial
data converting functions.
It can communicate with a microcontroller via few wiring thanks to the adoption of the 2-wire I²C BUS.
Maximum 8 ICs can be connected to a bus by using 3-chip select pins, so that it is possible to handle up
to 64 bits data.
Features
 Simple 2-wire (SCL and SDA) communication with a microcontroller.
 8-bit data conversion between serial and parallel by I²C BUS.
 Corresponds to Fast mode (400kHz) of I²C BUS specification.
 Possible to set input and output each bit separately.
 By using three chip select pins (CS0,CS1,CS2), R2A20150 can connect with the same BUS line
to maximum 8 pieces.
 Very small package line-up QFN-16 and TSSOP-16.
Application
I/O port expansion of Microcomputer.
Data conversion from serial to parallel and from parallel to serial in peripheral of Microcomputer.
Block Diagram
CS0
16
14
CS1
15
13
CS2
14
12
Number for TSSOP package
Number for QFN package
SCL 2 16
SDA ^{3 1}
VDD ^{13 11}
GND 8 6
Reset
POWER ON
RESET
I²C BUS
TRANSCIEVER
SHIFT
RESISTOR
Output Data
Input/Output
8
8
8
OUTPUT
DATA LATCH
I/O SETTING
DATA LATCH
INPUT
DATA LATCH
8
8
I/O PORT
8
Input Data
15 1 SO
10
9
8
7
5
4
3
2
12 11 10
9
7
6
5
4
D7 D6 D5 D4 D3 D2 D1 D0
R03DS0012EJ0100 Rev.1.00
2011.09.05
Page 1 of 10