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参数资料
| 型号： | TC74A4-5.0VCTRT |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO5 |
| 封装： | EIAJ, SC-74A, SOT-23A, 5 PIN |
| 文件页数： | 3/10页 |
| 文件大小： | 63K |
| 代理商： | TC74A4-5.0VCTRT |
2
TC74-4 3/26/99
Tiny Serial Digital Thermal Sensor
TC74
2001 Microchip Technology Inc.
DS21462A
ABSOLUTE MAXIMUM RATINGS*
Supply Voltage (VDD) ................................................. +6V
Voltage On Any Pin ............ (GND – 0.3V) to (VDD + 0.3V)
Operating Temperature (TA) ............................ See Below
Storage Temperature (TSTG) ................. – 65°C to +150°C
Current On Any Pin ...............................................
±50 mA
Package Thermal Resistance (
θJA) .................... 330°C/W
*Static-sensitive device. Unused devices must be stored in conductive
material. Protect devices from static discharge and static fields. Stresses
above those listed under Absolute Maximum Ratings may cause perma-
nent damage to the device. These are stress ratings only and functional
operation of the device at these or any other conditions above those
indicated in the operational sections of the specifications is not implied.
Exposure to Absolute Maximum Rating Conditions for extended periods
may affect device reliability.
NOTES: 1. Operating current is an average value integrated over multiple conversion cycles. Transient current may exceed this specification.
2. Maximum guaranteed conversion time after Power-On RESET (POR to DATA_RDY) is 250 msec.
3. Output current should be minimized for best temperature accuracy. Power dissipation within the TC74 will cause self-heating and
temperature drift error.
4. SDA and SCL must be connected to VDD or GND.
5. VDD = 3.3V for TC74x -3.3VCT. VDD = 5.0V for TC74x -5.0VCT. All part types of the TC74 will operate properly over the wider power
supply range of 2.7V to 5.5V. Each part type is tested and specified for rated accuracy at its nominal supply voltage. As VDD varies from
the nominal value, accuracy will degrade 1
°C/V of VDD change.
ELECTRICAL CHARACTERISTICS: VDD = 3.3V or 5.0V (Note 5), – 40°C ≤ TA ≤ 125°C, unless otherwise noted.
Symbol
Parameter
Test Conditions
Min
Typ
Max
Unit
Power Supply
VPOR
Power-On Reset Threshold
VDD Falling Edge or Rising Edge
1.2
—
2.2
V
IDD
Operating Current
VDD = 5.5V
—
200
350
A
Serial Port Inactive (Note 1)
IDD-STANDBY Standby Supply Current
VDD = 3.3V
—
510
A
Serial Port Inactive (Note 4)
Temperature-to-Bits Converter
TERR
Temperature Accuracy TC74A
+25
°C <TA < +85°C
–2
—
+2
°C
0
°C < TA < +125°C
–3
—
+3
°C
–40
°C < TA < 0°C
—
±2
—
°C
CR
Conversion Rate
(Note 2)
4
8
—
Sa/Sec
Serial Port Interface
VIH
Logic Input High
0.8 x VDD
——
V
VIL
Logic Input Low
——
0.2 x VDD
V
VOL
SDA Output Low
IOL = 3 mA
——
0.4
V
IOL = 6 mA
——
0.6
V
(Note 3)
CIN
Input Capacitance SDA, SCL
—
5
—
pF
ILEAK
I/O Leakage
–1
0.1
1
A
SERIAL PORT AC TIMING: VDD = 3.3V or 5.0V (Note 5), –40°C ≤ (TA = TJ) ≤ 125°C; CL = 80 pF, unless otherwise noted.)
Symbol
Parameter
Test Conditions
Min
Typ
Max
Unit
fSMB
SMBus Clock Frequency
10
—
100
KHz
tLOW
Low Clock Period
10% to 10%
4.7
——
sec
tHIGH
High Clock Period
90% to 90%
4
——
sec
tR
SMBus Rise Time
10% to 90%
——
1000
nsec
tF
SMBus Fall Time
90% to 10%
——
300
nsec
tSU(START)
Start Condition Setup Time
90% SCL to 10% SDA
4
——
sec
(for repeated Start Condition)
tH(START)
Start Condition Hold Time
4
——
sec
tSU-DATA
Data In Setup Time
1000
——
nsec
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