BQ20Z40 Datasheet, PDF (6/18 Pages) Texas Instruments – SBS 1.1-COMPLIANT GAS GAUGE ENABLED WITH IMPEDANCE TRACK™ TECHNOLOGY FOR USE WITH THE bq29330

bq20z40
SLUS801A – FEBRUARY 2009 – REVISED MARCH 2009................................................................................................................................................ www.ti.com
DATA FLASH MEMORY CHARACTERISTICS
V_CC = 2.4 V to 2.6 V, T_A = –40°C to 85°C (unless otherwise noted)
PARAMETER
t_DR
Data retention
Flash programming write-cycles
t_(WORDPROG) Word programming time
I_(DDdPROG) Flash-write supply current
See ⁽¹⁾
See ⁽¹⁾
See ⁽¹⁾
See ⁽¹⁾
TEST CONDITIONS
(1) Specified by design. Not production tested.
MIN
10
20,000
TYP MAX UNIT
Years
Cycles
2 ms
5
10 mA
SMBus TIMING SPECIFICATIONS
V_CC = 2.4 V to 2.6 V, T_A = –40°C to 85°C (unless otherwise noted)
f_SMB
f_MAS
t_BUF
t_HD:STA
t_SU:STA
t_SU:STO
PARAMETER
SMBus operating frequency
SMBus master clock frequency
Bus free time between start and stop
Hold time after (repeated) start
Repeated start setup time
Stop setup time
t_HD:DAT
Data hold time
t_SU:DAT
t_TIMEOUT
t_LOW
t_HIGH
t_LOW:SEXT
t_LOW:MEXT
t_F
t_R
Data setup time
Error signal/detect
Clock low period
Clock high period
Cumulative clock low slave extend time
Cumulative clock low master extend time
Clock/data fall time
Clock/data rise time
TEST CONDITIONS
Slave mode, SMBC 50% duty cycle
Master mode, no clock low slave extend
Receive mode
Transmit mode
See ⁽¹⁾
See ⁽²⁾
See ⁽³⁾
See ⁽⁴⁾
(V_ILMAX – 0.15 V) to (V_IHMIN + 0.15 V)
0.9 V_CC to (V_ILMAX – 0.15 V)
MIN TYP MAX UNIT
10
51.2
100
kHz
4.7
4
µs
4.7
4
0
300
ns
250
25
35 ms
4.7
µs
4
50
25
ms
10
300
ns
1000
(1) The bq20z40 times out when any clock low exceeds t_TIMEOUT.
(2) t_HIGH:MAX. is minimum bus idle time. SMBC = 1 for t > 50 µs causes reset of any transaction involving the bq20z40 that is in progress.
(3) t_LOW:SEXT is the cumulative time a slave device is allowed to extend the clock cycles in one message from initial start to the stop.
(4) t_LOW:MEXT is the cumulative time a master device is allowed to extend the clock cycles in one message from initial start to the stop.
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