Digital Temperature Sensor Microchip TC74A3-3.3VAT with Multi Drop Capability and Fast Conversion Rate

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Product Description

Product Overview

The TC74 is a serially accessible, digital temperature sensor designed for low-cost, small-form-factor applications. It converts temperature from an onboard sensing element into an 8-bit digital word, accessible via a 2-wire SMBus/I2C compatible serial port. This allows for multi-drop/multi-zone monitoring and features a low-power Standby mode. With a temperature resolution of 1C and a typical conversion rate of 8 samples/sec, the TC74 is ideal for thermal management in various systems.

Product Attributes

Brand: Microchip Technology Inc.
Origin: Not specified
Material: Not specified
Color: Not specified
Certifications: Not specified

Technical Specifications

Parameter	Symbol	Min	Typ	Max	Units	Conditions
Absolute Maximum Ratings
Supply Voltage (VDD)				+6	V
Voltage On Any Pin		(GND 0.3V)		(VDD + 0.3V)	V
Current On Any Pin				50	mA
Operating Temperature (TA)		-40		+125	C
Storage Temperature (TSTG)		-65		+150	C
Junction Temperature (TJ)				+150	C
DC Characteristics
Power-on Reset Threshold	VPOR	1.2		2.2	V	VDD Falling Edge or Rising Edge
Supply Voltage	VDD	2.7		5.5	V	Note 5
Operating Current	IDD		200	350	A	VDD = 5.5V, Note 1
Standby Supply Current	IDD-STANDBY		5.0	10	A	VDD = 3.3V, Serial Port Inactive, Note 4
Temperature Accuracy	TERR		2.0		C	+25C <TA < +85C
Temperature Accuracy	TERR		3.0		C	0C < TA < +125C
Conversion Rate	CR	4	8		SPS	Note 2
Logic Input High	VIH	0.8 x VDD			V
Logic Input Low	VIL			0.2 x VDD	V
SDA Output Low	VOL			0.4	V	IOL = 3 mA
SDA Output Low	VOL			0.6	V	IOL = 6 mA, Note 3
Input Capacitance	CIN		5.0		pF	SDA, SCLK
I/O Leakage	ILEAK	-1.0	0.1	1.0	A
Serial Port AC Timing (CLOAD = 80 pF)
SMBus/I2C Clock Frequency	fSMB	10		100	kHz
Low Clock Period	tLOW	4.7			sec
High Clock Period	tHIGH	4.0			sec
SMBus/I2C Rise Time	tR			1000	nsec	10% to 90%
SMBus/I2C Fall Time	tF			300	nsec	90% to 10%
START Condition Setup Time	tSU(START)	4.0			sec	90% SCLK to 10% SDA
START Condition Hold Time	tH(START)	4.0			sec
Data In Setup Time	tSU-DATA	1000			nsec
Data In Hold Time	tH-DAT	1250			nsec
STOP Condition Setup Time	tSU(STOP)	4.0			sec
Bus Free Time Prior to New Transition	tIDLE	4.7			sec
Power-on Reset Delay	tPOR		500		sec	VDD VPOR (Rising Edge)