TCN75
DS21490C-page 4
?2006 Microchip Technology Inc.
TIMING DIAGRAM
TCN75 ELECTRICAL SPECIFICATIONS (CONTINUED)
Electrical Characteristics: 2.7V d V
DD
d 5.5V; -55癈 d (T
A
= T
J
) d 125癈, C
L
= 80 pF, unless otherwise noted.
Symbol Parameter
Min
Typ
Max
Unit
Test Conditions
Serial Port Timing
f
SC
Serial Port Frequency
0
100
400
kHz
t
LOW
Low Clock Period
1250
nsec
t
HIGH
High Clock Period
1250
nsec
t
R
SCL and SDA Rise Time
250
nsec
t
F
SCL and SDA Fall Time
250
nsec
t
SU(START)
Start Condition Setup Time (for
repeated Start Condition)
1250
nsec
t
SC
SCL Clock Period
2.5
約ec
t
H(START)
Start Condition Hold Time
100
nsec
t
DSU
Data in Setup Time to SCL High
100
nsec
t
DH
Data in Hold Time after SCL Low
0
nsec
t
SU(STOP)
Stop Condition Setup Time
100
nsec
t
IDLE
Bus Free Time Prior to New Transition
1250
nsec
Note 1: Output current should be minimized for best temperature accuracy. Power dissipation within the TCN75 will cause self-heating and
temperature drift. At maximum rated output current and saturation voltage, 4 mA and 0.8V, respectively, the error amounts to 0.544癈 for
the SOIC.
2: All part types of the TCN75 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癈/V of V
DD
change.
3: Human body model, 100 pF discharged through a 1.5k resistor.
SCL
t
SC
t
DSU
t
SU (Stop)
t
H (Start)
t
DH
SDA
Data In
SDA
Data Out
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