DS75LV_0611 Datasheet, PDF (3/13 Pages) Maxim Integrated Products – Digital Thermometer and Thermostat

Falling SCL
Low Period of SCL
High Period of SCL
Repeated START Condition
Setup Time to Rising SCL
Data-Out Hold Time from
Falling SCL
Data-In Setup Time to
Rising SCL
Rise Time of SDA and SCL
(Receive)
Fall Time of SDA and SCL
(Receive)
Spike Suppression Filter
Time (Deglitch Filter)
STOP Setup Time to Rising
SCL
Capacitive Load for Each
Bus Line
Input Capacitance
Serial Interface Reset Time
t_LOW
t_HIGH
t_SU:STA
t_HD:DAT
t_SU:DAT
t_R
t_F
t_SS
t_SU:STO
C_B
C_I
t_TIMEOUT
DS75LV: Digital Thermometer and Thermostat
(Note 5)
(Note 5)
(Note 5)
(Notes 5, 8)
(Note 5)
(Notes 5, 7)
(Notes 5, 7)
(Note 5)
SDA time low (Note 9)
1.3
0.6
600
0
100
20 + 0.1C_B
20 + 0.1C_B
0
600
5
75
μs
μs
ns
0.9
μs
ns
300
ns
300
ns
50
ns
ns
400
pF
pF
325 ms
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
Note 6:
Note 7:
Note 8:
Note 9:
Note
10:
All voltages are referenced to ground.
Internal heating caused by O.S. loading will cause the DS75LV to read approximately 0.5°C higher if O.S. is sinking the max rated
current.
I_DD specified with O.S. pin open.
I_DD specified with V_DD at 3.0V and SDA, SCL = 3.0V, 0°C to 70°C.
See Timing Diagram in Figure 2. All timing is referenced to 0.9 x V_DD and 0.1 x V_DD.
After this period, the first clock pulse is generated.
For example, if C_B = 300pF, then t_R[min] = t_F[min] = 50ns.
The DS75LV provides an internal hold time of at least 75ns on the SDA signal to bridge the undefined region of SCL's falling edge.
This time-out applies only when the DS75LV is holding SDA low. Other devices can hold SDA low indefinitely and the DS75LV will
not reset.
The DS75LV has a maximum operating voltage of 3.7V. Contact Dallas Semiconductor for information on the availability of a 3.7V to
5.5V version of the DS75LV.
Table 1. Detailed Pin Description
PIN
SYMBOL
PIN DESCRIPTION
1
SDA
Data Input/Output. For 2-wire serial communication port. Open-drain.
2
SCL
Clock Input. 2-wire serial communication port.
3
O.S.
Thermostat Output. Open-drain.
4
GND
Ground
5
A₂
Address Input
6
A₁
Address Input
7
A₀
Address Input
8
V_DD
Supply Voltage. +1.7V to +3.7V supply pin.
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