DataSheet.es    


PDF MC74A5 Data sheet ( Hoja de datos )

Número de pieza MC74A5
Descripción Serial Digital Temperature Sensor
Fabricantes ON Semiconductor 
Logotipo ON Semiconductor Logotipo



Hay una vista previa y un enlace de descarga de MC74A5 (archivo pdf) en la parte inferior de esta página.


Total 12 Páginas

No Preview Available ! MC74A5 Hoja de datos, Descripción, Manual

MC74
Serial Digital
Temperature Sensor
The MC74 is a serial digital temperature sensor suited for low cost
applications. Temperature data is converted from the integrated
thermal sensing element and made available as an 8–bit serial digital
word. Communication with the MC74 is accomplished via 2–wire
SMBus/I2C–compatible serial port. Temperature resolution is 1°C.
Conversion rate is a nominal 8 samples/sec. Power consumption is
only 200 µA (5.0 µA Standby).
Features
Temperature Range: –40°C to +125°C
Outputs Temperature as an 8–Bit Digital Word
Simple Serial Port Interface
Solid State Temperature Sensing:
±2°C Accuracy from +25°C to +85°C
±3°C Accuracy from 0°C to +125°C
3.3 V and 5.5 V Operating Range
Low Power
200 µA Operations
5.0 µA Standby Mode
Typical Applications
Thermal Protection for Hard Disk Drives and Other PC Peripherals
Low–Cost Thermostat Controls
Power Supplies
FUNCTIONAL BLOCK DIAGRAM
Internal Sensor
(Diode)
Serial Port
Interface
DS Modulator
Control
Logic
Temperature
Register
SDA
SCL
http://onsemi.com
5
1
2
3
4
SOT–23
SN SUFFIX
CASE 1212
1
5
TO–220
T SUFFIX
CASE 314D
PIN CONNECTIONS
NC 1
5 SDA
GND 2
VDD 3
4 SCL
(Top View)
SOT–23A*
NOTE: *SOT–23A is equivalent to EIAJ–SC74A
ORDERING INFORMATION
See detailed ordering and shipping information on page 9 of
this data sheet.
DEVICE MARKING INFORMATION
See general marking information in the device marking
section on page 9 of this data sheet.
© Semiconductor Components Industries, LLC, 2000
November, 2000 – Rev. 1
1
Publication Order Number:
MC74/D

1 page




MC74A5 pdf
MC74
Write Byte Format
S ADDRESS
7 Bits
Slave Address
Read Byte Format
WR ACK
COMMAND ACK DATA ACK
P
8 Bits
8 Bits
Command Byte: selects
which register you are
writing to.
Data Byte: data goes
into the register set
by the command byte.
S ADDRESS WR
7 Bits
Slave Address
ACK COMMAND ACK
8 Bits
S ADDRESS RD ACK
7 Bits
Command Byte: selects
which register you are
reading from.
Slave Address: repeated
due to change in data–
flow direction.
DATA NACK P
8 Bits
Data Byte: reads from
the register set by the
command byte.
Receive Byte Format
S ADDRESS RD ACK DATA NACK P
7 Bits
8 Bits
Data Byte: reads data from
the register commanded by
the last Read Byte or Write
Byte transmission.
S = Start Condition
P = Stop Condition
Shaded = Slave Transmission
Figure 1. SMBus Protocols
Start Condition (START)
The MC74 continuously monitors the SDA and SCL lines
for a start condition (a HIGH to LOW transition of SDA
while SCL is HIGH) and will not respond until this condition
is met.
Address Byte
Immediately following the Start Condition, the host must
transmit the address byte to the MC74. The states of A1 and
A0 determine the 7–bit SMBus address for the MC74. The
7–bit address transmitted in the serial bit stream must match
for the MC74 to respond with an Acknowledge (indicating
the MC74 is on the bus and ready to accept data). The eighth
bit in the Address Byte is a Read–Write Bit. This bit is a 1
for a read operation or 0 for a write operation. During the
first phase of any transfer this bit will be set = 0 to indicate
that the command byte is being written.
Acknowledge (ACK)
Acknowledge (ACK) provides a positive handshake
between the host and the MC74. The host releases SDA after
transmitting eight bits, then generates a ninth clock cycle to
allow the MC74 to pull the SDA line LOW to acknowledge
that it successfully received the previous eight bits of data or
address.
Data Byte
After a successful ACK of the address byte, the host must
transmit the data byte to be written or clock out the data to
be read. (See the appropriate timing diagrams. ) ACK will
be generated after a successful write of a data byte into the
MC74.
Stop Condition (STOP)
Communications must be terminated by a stop condition
(a LOW to HIGH transition of SDA while SCL is HIGH).
The Stop Condition must be communicated by the
transmitter to the MC74. NOTE: Refer to Timing Diagrams
for serial bus timing (Figure 2).
http://onsemi.com
5

5 Page





MC74A5 arduino
Notes
MC74
http://onsemi.com
11

11 Page







PáginasTotal 12 Páginas
PDF Descargar[ Datasheet MC74A5.PDF ]




Hoja de datos destacado

Número de piezaDescripciónFabricantes
MC74A0Serial Digital Temperature SensorON Semiconductor
ON Semiconductor
MC74A1Serial Digital Temperature SensorON Semiconductor
ON Semiconductor
MC74A2Serial Digital Temperature SensorON Semiconductor
ON Semiconductor
MC74A3Serial Digital Temperature SensorON Semiconductor
ON Semiconductor

Número de piezaDescripciónFabricantes
SLA6805M

High Voltage 3 phase Motor Driver IC.

Sanken
Sanken
SDC1742

12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters.

Analog Devices
Analog Devices


DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares,
permitiéndote verlos en linea o descargarlos en PDF.


DataSheet.es    |   2020   |  Privacy Policy  |  Contacto  |  Buscar