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參數(shù)資料
| 型號： | TC74A7-50VCT |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | Tiny Serial Digital Thermal Sensor |
| 中文描述： | 微型串行數(shù)字溫度傳感器 |
| 文件頁數(shù)： | 3/16頁 |
| 文件大?。?/td> | 430K |
| 代理商： | TC74A7-50VCT |
2002 Microchip Technology Inc.
DS21462B-page 3
TC74
1.0
ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings*
Supply Voltage (V
DD
)............................................ +6V
Voltage On Any Pin.......(GND – 0.3V) to (V
DD
+ 0.3V)
Current On Any Pin..........................................±50 mA
Operating Temperature (T
A
)........................See Below
Storage Temperature (T
STG
)..............-65°C to +150°C
*Stresses above those listed under "Absolute Maximum Rat-
ings" may cause permanent 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
operation sections of the specifications is not implied. Expo-
sure to Absolute Maximum Rating conditions for extended
periods may affect device reliability.
TC74 ELECTRICAL SPECIFICATIONS
Electrical Characteristics:
V
DD
= 3.3V or 5.0V
(Note 5)
, -40°C
≤
T
A
≤
125°C, unless otherwise noted.
Symbol
Parameter
Min
Typ.
Max
Unit
Test Conditions
Power Supply
V
POR
I
DD
Power-on Reset Threshold
Operating Current
1.2
—
—
200
2.2
350
V
μ
A
V
DD
Falling Edge or Rising Edge
V
DD
= 5.5V
Serial Port Inactive
(Note 1)
V
DD
= 3.3V
Serial Port Inactive
(Note 1)
I
DD-STANDBY
Standby Supply Current
—
5
10
μ
A
Temperature to Bits Converter
T
ERR
Temperature Accuracy TC74A
-2
-3
—
4
—
+2
—
+2
—
°C
+25°C <T
A
< +85°C
0°C < T
A
< +125°C
-40°C < T
A
< 0°C
(Note 2)
CR
Serial Port Interface
V
IH
V
IL
V
OL
Conversion Rate
8
Sps
Logic Input High
Logic Input Low
SDA Output Low
0.8 x V
DD
—
—
—
—
-1
—
—
—
—
5
0.1
—
V
V
V
V
pF
μ
A
0.2 x V
DD
0.4
0.6
—
1
I
OL
= 3 mA
I
OL
= 6 mA
(Note 3)
C
IN
I
LEAK
Note
Input Capacitance SDA, SCL
I/O Leakage
1:
2:
3:
Operating current is an average value integrated over multiple conversion cycles. Transient current may exceed this specification.
Maximum ensured conversion time after Power-on Reset (POR to DATA_RDY) is 250 msec.
Output current should be minimized for best temperature accuracy. Power dissipation within the TC74 will cause self-heating and
temperature drift error.
SDA and SCLK must be connected to V
DD
or GND.
V
= 3.3V for TC74X -3.3VCT. V
= 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 V
DD
varies from
the nominal value, accuracy will degrade 1°C/V of V
DD
change.
4:
5:
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