DS1775R/TR1 DALLAS [Dallas Semiconductor], DS1775R/TR1 Datasheet - Page 12

• Manufacturer Part Number: DS1775R/TR1
• Description: SOT23-5 Digital Thermometer and Thermostat
• Manufacturer: DALLAS [Dallas Semiconductor]

AC ELECTRICAL CHARACTERISTICS:
2–WIRE INTERFACE
PARAMETER
SCL clock frequency
Bus free time between a
STOP and START
condition
Hold time (repeated)
START condition
LOW period of SCL
HIGH period of SCL
Set-up time for a
repeated START
Data hold time
Data set-up time
Rise time of both SDA and
SCL signals
Fall time of both SDA and
SCL signals
Set-up time for STOP
Capacitive load for each bus
line
Input Capacitance
NOTES:
1. All voltages are referenced to ground.
2. I/O pins of fast mode devices must not obstruct the SDA and SCL lines if V
3. I
4. I
5. After this period, the first clock pulse is generated.
6. The maximum t
7. A fast mode device can be used in a standard mode system, but the requirement t
8. C
9. Internal heating caused by O.S. loading will cause the DS1775 to read approximately 0.5? C higher if
10. Contact the factory in Dallas, [phone], for operation requiring temperature readings greater
SCL signal.
then be met. This will automatically be the case if the device does not stretch the LOW period of the
SCL signal. If such a device does stretch the LOW period of the SCL signal, it must output the next
data bit to the SDA line t
O.S. is sinking the max rated current.
than 120°C.
DD
DD
b
– total capacitance of one bus line in pF.
specified with O.S. pin open.
specified with V
HD:DAT
CC
has only to be met if the device does not stretch the LOW period (t
at 5.0V and SDA, SCL = 5.0V, 0 C to +70 C.
R MAX
SYMBOL
t
t
t
t
t
HD:DAT
HD:STA
SU:DAT
t
SU:STA
SU:STO
t
t
f
+t
HIGH
LOW
BUF
C
SCL
C
t
t
R
F
SU:DAT
b
I
= 1000+250 = 1250 ns before the SCL line is released.
Standard Mode
Standard Mode
Standard Mode
Standard Mode
Standard Mode
Standard Mode
Standard Mode
Standard Mode
Standard Mode
Standard Mode
Standard Mode
CONDITION
Fast Mode
Fast Mode
Fast Mode
Fast Mode
Fast Mode
Fast Mode
Fast Mode
Fast Mode
Fast Mode
Fast Mode
Fast Mode
12 of 13
(–55 C to +125 C; V
0.1C
0.1C
MIN
100
250
20+
20+
1.3
4.7
0.6
4.0
1.3
4.7
0.6
4.0
0.6
4.7
0.6
4.0
0
0
B
B
TYP
5
MAX
DD
1000
400
100
300
300
300
400
DD
0.9
0.9
=2.7V to 5.5V)
is switched off.
SU:DAT
UNITS NOTES
102299
KHZ
pF
pF
ns
ns
ns
s
s
s
s
s
s
s
250 ns must
LOW
) of the
DS1775
5
6
7
8
8
8