Datasheet

bq20z75-V180
www.ti.com SLUSA22 –DECEMBER 2009
Electrical Characteristics (continued)
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
=
14V, C
REG25
= 1µF, C
REG33
= 2.2µF; typical values at T
A
= 25°C (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
–3% 0.25% 3%
f
(EIO)
Frequency error
(12) (13)
T
A
= 20°C to 70°C –2% 0.25% 2%
t
(SXO)
Start-up time
(14)
2.5 5 ms
LOW FREQUENCY OSCILLATOR
f
(LOSC)
Operating frequency 32.768 kHz
–2.5% 0.25% 2.5%
f
(LEIO)
Frequency error
(13) (15)
T
A
= 20°C to 70°C –1.5% 0.25% 1.5%
t
(LSXO)
Start-up time
(14)
500 µs
(12) The frequency error is measured from 4.194 MHz.
(13) The frequency drift is included and measured from the trimmed frequency at V
REG25
= 2.5V, T
A
= 25°C
(14) The startup time is defined as the time it takes for the oscillator output frequency to be ±3%
(15) The frequency error is measured from 32.768 kHz.
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 BACKUP
V
(RBI)
> V
(RBI)MIN
, V
REG25
< V
IT–
, 1000 2500
T
A
= 85°C
I
(RB)
RB data-retention input current nA
V
(RBI)
> V
(RBI)MIN
, V
REG25
< V
IT–
, 90 220
T
A
= 25°C
V
(RB)
RB data-retention input voltage
(1)
1.7 V
(1) Assured 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 51.2 kHz
extend
t
(BUF)
Bus free time between start and stop 4.7 µs
(see Figure 1)
t
(HD:STA)
Hold time after (repeated) start (see Figure 1) 4.0 µs
t
(SU:STA)
Repeated start setup time (see Figure 1) 4.7 µs
t
(SU:STO)
Stop setup time (see Figure 1) 4.0 µs
t
(HD:DAT)
Receive mode 0 ns
Data hold time (see Figure 1)
Transmit mode 300
t
(SU:DAT)
Data setup time (see Figure 1) 250 ns
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