11AA040T-I/MS Microchip Technology, 11AA040T-I/MS Datasheet - Page 5

• Manufacturer Part Number: 11AA040T-I/MS
• Description: 4K, 512 X 8 1.8V SERIAL EE, IND 8 MSOP 3x3mm T/R
• Manufacturer: Microchip Technology

Specifications of 11AA040T-I/MS

• Format - Memory: EEPROMs - Serial
• Memory Type: EEPROM
• Memory Size: 4K (512 x 8)
• Speed: 100kHz
• Interface: UNI/O™ (Single Wire)
• Voltage - Supply: 1.8 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

1.0
As embedded systems become smaller, there exists a
growing need to minimize I/O signal consumption for
communication between devices. Microchip has
addressed this need by developing the patented**
UNI/O
requiring only a single I/O signal for communication.
UNI/O bus-compatible devices can be used to enhance
any application facing restrictions on available I/O.
Such restrictions can possibly stem from connectors,
board space, or from the master device itself.
1.1
The UNI/O bus provides the definition for communica-
tion through a single I/O signal. It supports the use of
multiple devices through a “bussed” system.
FIGURE 1-1:
© 2009 Microchip Technology Inc.
**UNI/O
following patent issued in the U.S.A.: 7,376,020.
SCIO
®
controller
®
bus, a low-cost, easy-to-implement solution
INTRODUCTION
Description
(Master)
Micro-
is a registered trademark of Microchip Technology Inc. Microchip’s UNI/O Bus products are covered by the
Converter
UNI/O
(Slave)
A/D
®
BUS EXAMPLE
UNI/O
EEPROM
Serial
(Slave)
®
Programmable
Gain Amplifier
Bus Specification
(Slave)
One device is defined as the master and is responsible
for initiating and coordinating all operations with the
slave devices on the bus. Each slave acts as a periph-
eral to the master and a slave can be designed for any
number of purposes.
Figure 1-1 shows an example system with a microcon-
troller acting as the master, and other numerous
devices attached to the bus as slave peripherals. Note
that the master is not limited to being a microcontroller,
but can be any device capable of processing the
necessary I/O signal.
Data is embedded into the I/O stream through
Manchester encoding. The bus is controlled by the
master which determines the clock period, controls the
bus access and initiates all operations, while all other
devices act as slaves. Both master and slave devices
can operate as transmitter or receiver, but the master
determines which mode is active.
The UNI/O bus supports operation from 10 kbps to 100
kbps (equivalent to 10 kHz to 100 kHz) and places no
restrictions on voltage ranges, temperature ranges, or
manufacturing processes.
Temperature
Sensor
(Slave)
UNI/O
Expander
I/O Port
(Slave)
Potentiometer
®
Digital
(Slave)
DS22076D-page 5
Bus