MC74 ON Semiconductor, MC74 Datasheet - Page 3

• Manufacturer Part Number: MC74
• Manufacturer: ON Semiconductor

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
4. SDA and SCL must be connected to V DD or GND.
5. V DD = 3.3V for MC74A5–33SNTR. V DD = 5.0V for MC74A5–50T. All part types of the MC74 will operate properly over the wider power supply
DC ELECTRICAL CHARACTERISTICS (V DD = 3.3 V or 5.0V (5) , –40 C
Power Supply
V POR
I DD
I DD–STANDBY
Temperature–to–Bits Converter
T ERR
CR
Serial Port Interface
V IH
V IL
V OL
C IN
I LEAK
SERIAL PORT AC TIMING (V DD = 3.3 V or 5.0V, –40 C
f SMB
t LOW
t HIGH
t R
t F
t SU(START)
t H(START)
t SU–DATA
t H–DATA
t SU(STOP)
t IDLE
t POR
temperature drift error.
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.
Symbol
Symbol
Power–On Reset Threshold
Operating Current
Standby Supply Current
Temperature Accuracy MC74A
+25 C
0 C
–40 C
Conversion Rate (2)
Logic Input High
Logic Input Low
SDA Output Low
Input Capacitance SDA, SCL
I/O Leakage
SMBus Clock Frequency
Low Clock Period (10% to 10%)
High Clock Period (90% to 90%)
SMBus Rise Time (10% to 90%)
SMBus Fall Time (90% to 10%)
Start Condition Setup Time (90% SCL to 10% SDA)
Start Condition Hold Time
Data in Setup Time
Data in Hold Time
Stop Condition Setup Time
Bus Free Time Prior to New Transition
Power–On Reset Delay (V DD
(V DD Falling Edge or Rising Edge)
(V DD = 5.5V, Serial Port Inactive) (1)
(V DD = 3.3 V, Serial Port Inactive) (4)
I OL = 3 mA (3)
I OL = 6 mA (3)
(for Repeated Start Condition)
T A
T A
T A
+125 C
+85 C
0 C
Characteristic
Characteristic
V POR (Rising Edge))
http://onsemi.com
(T A = T J )
MC74
3
125 C; C L = 80 pF unless otherwise noted.)
T A
125 C, unless otherwise noted.)
0.8 x V DD
–2.0
–3.0
–1.0
Min
1.2
4.0
—
—
—
—
—
—
—
1,000
1,250
Min
4.7
4.0
4.0
4.0
4.0
4.7
10
—
—
—
Typ
200
5.0
8.0
5.0
0.1
—
—
—
—
—
—
—
2.0
Typ
500
—
—
—
—
—
—
—
—
—
—
—
0.2 x V DD
Max
+2.0
+3.0
350
2.2
0.4
0.6
1.0
10
—
—
—
—
1,000
Max
100
300
—
—
—
—
—
—
—
—
—
sa/sec
Unit
m
m
nsec
nsec
m
m
nsec
nsec
m
m
m
m
m
pF
m
Unit
kHz
V
V
V
V
C
A
A
A
sec
sec
sec
sec
sec
sec
sec