Rainbow Electronics DS2745 - Manual (Page 3)

DS2745 Low-Cost I 2 C Battery Monitor
3 of 14
±2
-20°C ≤ T
A
≤ +70°C,
2.5V ≤ V
DD
≤ 5.5V
±3
Input Resistance, VIN R
IN
15 MW
Input Logic High:
SCL, SDA
V
IH
(Note 1) 1.5 V
Input Logic Low:
SCL, SDA
V
IL
(Note 1) 0.6 V
Output Logic Low:
SDA, PIO
V
OL
I
OL
= 4mA (Note 1) 0.4 V
Pulldown Current: SCL,
SDA
I
PD
0.25 mA
Input Capacitance: SCL,
SDA
C
BUS
50 pF
SLEEP Timeout t
SLEEP
(Note 3) 2.2 S
Input Logic High:
PIO
V
IH
(Note 1) V
DD
x 0.7 V
Input Logic Low:
PIO
V
IL
(Note 1) V
DD
x 0.3 V
2-WIRE INTERFACE TIMING SPECIFICATIONS
(V
DD
= 2.5V to 5.5V, T
A
= -20 °C to +70°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
SCL Clock Frequency fSCL (Note 6) 0 400 KHz
Bus Free Time Between a
STOP and START Condition
tBUF 1.3 µs
Hold Time (Repeated)
START Condition
tHD:STA (Note 7) 0.6 µs
Low Period of SCL Clock tLOW 1.3 µs
High Period of SCL Clock tHIGH 0.6 µs
Setup Time for a Repeated
START Condition
tSU:STA 0.6 µs
Data Hold Time tHD:DAT (Note 8, 9) 0 0.9 µs
Data Setup Time tSU:DAT (Note 8) 100 ns
Rise Time of Both SDA and
SCL Signals
tR 20 + 0.1C
B
300 ns
Fall Time of Both SDA and
SCL Signals
tF 20 + 0.1C
B
300 ns
Setup Time for STOP
Condition
tSU:STO 0.6 µs
Spike Pulse Widths
Suppressed by Input Filter
tSP (Note 10) 0 50 ns
Capacitive Load for Each
Bus
Line
CB (Note 11) 400 pF
SCL, SDA Input
Capacitance
C
BIN
60 pF