TC77-5.0MOATR Microchip Technology, TC77-5.0MOATR Datasheet - Page 11

• Manufacturer Part Number: TC77-5.0MOATR
• Description: IC THERMAL SENSOR SPI 5V 8-SOIC
• Manufacturer: Microchip Technology

Specifications of TC77-5.0MOATR

• Function: Temp Monitoring System (Sensor)
• Topology: ADC (Sigma Delta), Register Bank
• Sensor Type: Internal
• Sensing Temperature: -55°C ~ 125°C
• Output Type: MICROWIRE™, SPI™
• Output Alarm: No
• Output Fan: No
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -55°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Full Temp Accuracy: 3 C
• Digital Output - Bus Interface: MICROWIRE, SPI
• Digital Output - Number Of Bits: 12 bit
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2.7 V
• Description/function: Outputs Temperature as a 13-Bit Digital Word
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 55 C
• Supply Current: 400 uA
• For Use With: TC77DM-PICTL - BOARD DEMO PICTAIL TC77
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

4.0
The TC77 Internal register structure consists of three
registers. The Temperature and Manufacturer’s Identi-
fication registers are read only, while the Configuration
register is write only.
TABLE 4-1:
4.1
The Configuration register is write only. This register
selects either Shutdown, Continuous Conversion or
Test modes:
• C15:C0 = XXXX/XXXX 1111/1111 (Shutdown
• C15:C0 = XXXX/XXXX 0000/0000 (Continuous
• The TC77 is in Shutdown mode when bits C0 to
It is recommended that the user write all ‘0’s or all ‘1’s
to the Configuration register because other bit codes
may put the TC77 in a test mode used for calibration
and production verification tests. Section 3.3 lists the
Configuration register bit codes that can be written to
the TC77 without having the device enter a production
test mode.
During Shutdown mode, the serial bus is still active.
The current consumption of the TC77 will be less than
1 µA during the time between serial communication.
CONFIG
TEMP
M_ID
*
2002 Microchip Technology Inc.
Bit 2 = 0 during power-up; otherwise, bit 2 =1
mode)
Conversion mode)
C7 are all equal to ‘1’s. The TC77 will be in the
Continuous Conversion mode if a ‘0’ in any bit
location from C0 to C7 is written to the Configura-
tion register. The TC77 is in the Continuous
Conversion mode at power-up.
Name
INTERNAL REGISTER
Configuration Register (CONFIG)
STRUCTURE
C15
T12
Bit
15
0
C14
T11
Bit
14
REGISTERS FOR TC77
1
C13
T10
Bit
13
0
C12
Bit
12
T9
1
C11
Bit
T8
11
0
C10
Bit
10
T7
1
Bit
C9
T6
9
0
Bit
C8
T5
8
0
Bit
C7
T4
7
0
Bit
C6
T3
6
0
4.2
The Temperature register is read only and holds the
temperature conversion data. Bits 0 and 1 are unde-
fined and will be tri-state outputs during a read
sequence. Bit 2 is set to a logic ‘1’ after completion of
the first temperature conversion following a power-up
or reset event. Bit 2 is set to a logic ‘0’ during the time
needed to complete the first temperature conversion.
Therefore, the status of bit 2 can be monitored to indi-
cate that the TC77 has completed the first temperature
conversion. Bits 15:3 contain the 13 bit two’s comple-
ment data from the temperature conversion.
4.3
The Manufacturer’s Identification code is contained in
this read only register. The Manufacturer ID register is
only available for a read operation when the TC77 is in
Shutdown mode. The Manufacturer’s ID code is con-
tained in bits 15:8 and is equal to 54 hex to indicate a
Microchip device. Bits 1:0 are undefined and will be tri-
state outputs during a read sequence, while bits 7:2 are
set to ‘0’.
Bit
C5
T2
5
0
Bit
C4
T1
4
0
Temperature Register (TEMP)
Manufacturer’s ID Register (M_ID)
Bit
C3
T0
3
0
Bit
C2
2
0
*
Bit
C1
1
x
x
Bit
C0
0
x
x
Value at Powerup/Reset
XXXX/XXXX 0000/0000
1111/1111 0000/0*XX
0101/0100 0000/00XX
DS20092A-page 11
TC77