MAX6577ZUT+T Maxim Integrated Products, MAX6577ZUT+T Datasheet - Page 4

• Manufacturer Part Number: MAX6577ZUT+T
• Description: IC TEMP SENSOR FREQ OUT SOT23-6
• Manufacturer: Maxim Integrated Products

Specifications of MAX6577ZUT+T

• Sensing Temperature: -40°C ~ 125°C
• Output Type: Clock
• Voltage - Supply: 2.7 V ~ 5.5 V
• Accuracy: ±0.8°C
• Package / Case: SOT-23-6
• Mounting Type: *
• Operating Temperature: *
• Function: *
• Sensor Type: *
• Topology: *
• Output Fan: *
• Output Alarm: *
• Full Temp Accuracy: +/- 0.8 C
• Digital Output - Bus Interface: Serial (1-Wire)
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2.7 V
• Description/function: Temp Sensor
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Supply Current: 400 uA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: MAX6577ZUT+T; MAX6577ZUT+TTR

SOT Temperature Sensors with
Period/Frequency Output
Table 1. MAX6576 Time-Select Pin
Configuration
Note: The temperature, in °C, may be calculated as follows:
The MAX6576/MAX6577 low-cost, low-current (140µA
typ) temperature sensors are ideal for interfacing with
microcontrollers (µCs) or microprocessors (µPs). The
MAX6576 converts ambient temperature into a 50% duty-
cycle square wave with a period proportional to absolute
temperature. The MAX6577 converts ambient tempera-
ture into a 50% duty-cycle square wave with a frequency
proportional to absolute temperature. Time-select pins
(TS1, TS0) permit the internal temperature-controlled
oscillator (TCO) to be scaled by four preset multipliers.
The MAX6576/MAX6577 feature a single-wire interface to
minimize the number of port pins necessary for interfac-
ing with a µP.
The MAX6576 temperature sensor converts tempera-
ture to period. The output of the device is a free-
running, 50% duty-cycle square wave with a period that
4
_______________________________________________________________________________________
PIN
4, 5
GND
GND
V
V
TS1
T( C)
1
2
3
6
DD
DD
scalar mulitplier( s/ K)
TS1, TS0
NAME
GND
OUT
N.C.
V
DD
period( s)
GND
GND
TS0
V
V
Detailed Description
MAX6576 Characteristics
DD
DD
Positive Supply Voltage
Ground
No Connection. Connect pin to GND or leave open.
Time-Select Pins. TS1 and TS0 set the temperature scale factor by connecting TS1 and TS0 to
either V
Square-Wave Output with a Clock Period Proportional to Absolute Temperature (°K) (MAX6576)
Square-Wave Output with a Clock Frequency Proportional to Absolute Temperature (°K) (MAX6577)
SCALAR MULTIPLIER
DD
or GND. See Tables 1 and 2.
273.15 K
(µs/°K)
160
640
10
40
is proportional to the absolute temperature (°K) of the
device (Figure 1). The MAX6576 has a push/pull CMOS
output with sharp edges. The speed of the output
square wave can be selected by hard-wiring TS1 and
TS0 as shown in Table 1. One of four scaled output
periods can be selected using TS1 and TS0.
The MAX6577 temperature sensor converts tempera-
ture to frequency. The output of the device is a free-
running, 50% duty-cycle square wave with a frequency
that is proportional to the absolute temperature (°K) of
the device (Figure 2). The MAX6577 has a push/pull
CMOS output with sharp edges. The speed of the out-
put square wave can be selected by hard-wiring TS1
and TS0 as shown in Table 2. One of four scaled output
frequencies can be selected using TS1 and TS0.
Note: The temperature, in °C, may be calculated as follows:
Table 2. MAX6577 Time-Select Pin
Configuration
GND
GND
V
V
TS1
FUNCTION
T( C)
DD
DD
scalar mulitplier(Hz/ K)
frequency(Hz)
GND
GND
TS0
V
V
MAX6577 Characteristics
DD
DD
Pin Description
SCALAR MULTIPLIER
(Hz/°K)
273.15 K
1/16
1/4
4
1