Datasheet

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PLL SWITCHING CHARACTERISTICS
OSCILLATOR
DATA FLASH MEMORY CHARACTERISTICS
REGISTER BACKUP
SMBus TIMING SPECIFICATIONS
bq2084-V143
SLUS732 – SEPTEMBER 2006
V
DD
= 3 V to 3.6 V, T
A
= –20 ° C to 85 ° C unless otherwise noted
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
t
(SP)
Start-up time
(1)
± 0.5% frequency error 2 5 ms
(1) The frequency error is measured from the trimmed frequency of the internal system clock, which is 128 x oscillator frequency, nominally
4.194 MHz.
V
DD
= 3 V to 3.6 V, T
A
= –20 ° C to 85 ° C (unless otherwise noted) (TYP: V
DD
= 3.3 V, T
A
= 25 ° C)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
ROSC = 100k –2% 0.5% 2%
f
(eio)
Frequency error from 32.768 kHz
XCK1 = 12 pF XTAL –0.25% 0.25%
f
(dio)
Frequency drift
(1)
ROSC = 100k, T
A
= 0 ° C to 50 ° C –1% 1%
f
(sio)
ROSC = 100k 200 µs
Start-up time
(2)
f
(sxo)
XCK1 = 12 pF XTAL 250 ms
(1) The frequency drift is measured from the trimmed frequency at V
DD
= 3.3 V, T
A
= 25 ° C.
(2) The start-up time is defined as the time it takes for the oscillator output frequency to be ± 1%
V
DD
= 3 V to 3.6 V, T
A
= –20 ° C to 85 ° C unless otherwise noted
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
t
DR
Data retention See
(1)
10 Years
Flash programming write-cycles See
(1)
20k Cycles
t
(WORDPROG)
Word programming time See
(1)
2 ms
I
(DDPROG)
Flash-write supply current See
(1)
8 12 mA
(1) Specified by design. Not production tested.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
I
(RBI)
RBI data-retention input current V
RBI
> 2 V, V
DD
< V
IT
10 100 nA
V
(RBI)
RBI data-retention voltage
(1)
1.3 V
(1) Specified by design. Not production tested.
V
DD
= 3 V to 3.6 V, T
A
= -20 ° C to 85 ° C 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
t
(BUF)
Bus free time between start and stop 4.7 µs
T
(HD:STA)
Hold time after (repeated) start 4 µs
t
(SU:STA)
Repeated start setup time 4.7 µs
t
(SU:STO)
Stop setup time 4 µs
Receive mode 0
t
(HD:DAT)
Data hold time ns
Transmit mode 300
t
SU:DAT)
Data setup time 250 ns
t
(TIMEOUT)
Error signal/detect See
(1)
25 35 ms
t
(LOW)
Clock low period 4.7 µs
(1) The bq2084-V143 times out when any clock low exceeds t
(TIMEOUT)
.
4
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