Datasheet

1.76
1.77
1.78
1.79
1.8
1.81
-40 -20 0 20 40 60 80
T -Free-AirTemperature-°C
A
Power-OnResetNegative-GoingV
oltage-V
POWERONRESETBEHAVIOR
FREE-AIRTEMPERATURE
VS
bq20z655
www.ti.com SLUSAH8A –APRIL 2011–REVISED MAY 2012
POWER-ON RESET
Over operating free-air temperature range (unless otherwise noted), T
A
= –40°C to 85°C, V
(REG25)
= 2.41 V to 2.59 V,
V
(BAT)
= 14 V, C
(REG25)
= 1 µF, C
(REG33)
= 2.2 µF; typical values at T
A
= 25°C (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
VIT- Negative-going voltage input 1.7 1.8 1.9 V
VHYS Power-on reset hysteresis 5 125 200 mV
t
RST
RESET active low time Active low time after power up or watchdog reset 100 250 560 µs
DATA FLASH CHARACTERISTICS OVER RECOMMENDED OPERATING TEMPERATURE AND
SUPPLY VOLTAGE
Typical values at T
A
= 25°C and V
(REG25)
= 2.5 V (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Data retention 10 Years
Flash programming write-cycles 20k Cycles
t
(ROWPROG)
Row programming time See
(1)
2 ms
t
(MASSERASE)
Mass-erase time 200 ms
t
(PAGEERASE)
Page-erase time 20 ms
I
(DDPROG)
Flash-write supply current 5 10 mA
I
(DDERASE)
Flash-erase supply current 5 10 mA
RAM/REGISTER BACKUP
V
(RBI)
> V
(RBI)MIN
, V
REG25
< V
IT–
, T
A
= 85°C 1000 2500
I
(RB)
RB data-retention input current nA
V
(RBI)
> V
(RBI)MIN
, V
REG25
< V
IT–
, T
A
= 25°C 90 220
V
(RB)
RB data-retention input voltage
(1)
1.7 V
(1) Specified by design. Not production tested.
SMBus TIMING CHARACTERISTICS
T
A
= –40°C to 85°C Typical Values at T
A
= 25°C and V
REG25
= 2.5 V (Unless Otherwise Noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
f
(SMB)
SMBus operating frequency Slave mode, SMBC 50% duty cycle 10 100 kHz
f
(MAS)
SMBus master clock frequency Master mode, No clock low slave extend 51.2 kHz
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