Rainbow Electronics DS1846 - Manual (Page 14)

DS1846
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AC ELECTRICAL CHARACTERISTICS (-40ºC to 85ºC, Vcc=2.7V to 5.5V)
PARAMETER SYMBOL CONDITION MIN TYP MAX UNITS NOTES
SCL clock frequency fSCL 0
0 400
100 kHz *,6
**
Bus free time between
STOP and START
condition tBUF 1.3
4.7
µ
s *,6
**
Hold time (repeated)
START condition tHD:STA 0.6
4.0
µ
s *,7,6
**
Low period of SCL
clock tLOW 1.3
4.7
µ
s *,6
**
High period of SCL
clock tHIGH 0.6
4.0
µ
s *,6
**
Data hold time tHD:DAT 0
0 0.9
µ
s *,6,8,9
**
Data set-up time tSU:DAT 100
250 ns *,6
**
Rise time of both SDA
and SCL signals tR 20+0.1C
B
300
1000
ns *,10
**
Fall time of both SDA
and SCL signals tF 20+0.1C
B
300
300 ns *,10
**
Set-up time for STOP
condition tSU:STO 0.6
4.0
µ
s *
**
Capacitive load for each
bus line CB 400 pF 10
EEPROM write time T
W
5 ms 11
PBRST = V
IL
t
PB
150 ns
Reset Active Time t
RST
130 205 285 ms
V
CC
Detect to RST and
RST
t
RPD
5 8 s
21
V
CC
Slew Rate t
F
20 s
Pulse width of spikes
which must be
suppressed by the input
filter t
SP
Fast Mode 0 50 ns
V
CC
Detect to RST and
RST
t
RPU
130 205 285 ms 22
V
CC
Slew Rate t
R
0 ns
PBRST Stable Low to
RST and RST
t
PDLY
250 ns
VIN Detect to NMI
t
IPD
5 8 s 21
* fast mode
** standard mode