參數(shù)資料
型號： MC74A6-3.3T
廠商： ON SEMICONDUCTOR
元件分類： 溫度/濕度傳感器
英文描述： DIGITAL TEMP SENSOR-SERIAL, 8BIT(s), 3Cel, RECTANGULAR, THROUGH HOLE MOUNT
封裝： TO-220, 5 PIN
文件頁數(shù)： 6/12頁
文件大?。?/td> 129K
代理商： MC74A6-3.3T
MC74
http://onsemi.com
3
DC ELECTRICAL CHARACTERISTICS (VDD = 3.3 V or 5.0 V (Note 5.), –40°C ≤ TA ≤ 125°C, unless otherwise noted.)
Characteristic
Symbol
Min
Typ
Max
Unit
Power Supply
Power–On Reset Threshold
(VDD Falling Edge or Rising Edge)
VPOR
1.2
–
2.2
V
Operating Current
(VDD = 5.5V, Serial Port Inactive) (Note 1.)
IDD
–
200
350
mA
Standby Supply Current
(VDD = 3.3 V, Serial Port Inactive) (Note 4.)
IDD–STANDBY
–
5.0
10
mA
Temperature–to–Bits Converter
Temperature Accuracy MC74A
+25
°C ≤ TA ≤ +85°C
0
°C ≤ TA ≤ +125°C
–40
°C ≤ TA ≤ 0°C
TERR
–2.0
–3.0
–
±2.0
+2.0
+3.0
–
°C
Conversion Rate (Note 2.)
CR
4.0
8.0
–
sa/sec
Serial Port Interface
Logic Input High
VIH
0.8 x VDD
–
V
Logic Input Low
VIL
–
0.2 x VDD
V
SDA Output Low
IOL = 3 mA (Note 3.)
IOL = 6 mA (Note 3.)
VOL
–
0.4
0.6
V
Input Capacitance SDA, SCL
CIN
–
5.0
–
pF
I/O Leakage
ILEAK
–1.0
0.1
1.0
mA
SERIAL PORT AC TIMING (VDD = 3.3 V or 5.0 V (Note 5.), –40°C ≤ (TA = TJ) ≤ 125°C; CL = 80 pF unless otherwise noted.)
Characteristic
Symbol
Min
Typ
Max
Unit
SMBus Clock Frequency
fSMB
10
–
100
kHz
Low Clock Period (10% to 10%)
tLOW
4.7
–
msec
High Clock Period (90% to 90%)
tHIGH
4.0
–
msec
SMBus Rise Time (10% to 90%)
tR
–
1,000
nsec
SMBus Fall Time (90% to 10%)
tF
–
300
nsec
Start Condition Setup Time (90% SCL to 10% SDA)
(for Repeated Start Condition)
tSU(START)
4.0
–
msec
Start Condition Hold Time
tH(START)
4.0
–
msec
Data in Setup Time
tSU–DATA
1,000
–
nsec
Data in Hold Time
tH–DATA
1,250
–
nsec
Stop Condition Setup Time
tSU(STOP)
4.0
–
msec
Bus Free Time Prior to New Transition
tIDLE
4.7
–
msec
Power–On Reset Delay (VDD ≥ VPOR (Rising Edge))
tPOR
–
500
–
msec
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 MC74 will cause self–heating and
temperature drift error.
4. SDA and SCL must be connected to VDD or GND.
5. VDD = 3.3 V for MC74–33SNTR. VDD = 5.0 V for MC74–50T. All part types of the MC74 will operate properly over the wider power supply
range of 2.7 V to 5.5 V. 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.
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