M41T94_09 Datasheet, PDF (14/41 Pages) STMicroelectronics – Serial real-time clock with 44 bytes NVRAM and reset

Operation
M41T94
Figure 8. Output timing requirements
E
SCL
SDO
tCLQV
tCLQX
MSB OUT
ADDR. LSB IN
SDI
tCH
tCL
tQLQH
tQHQL
LSB OUT
tEHQZ
AI04634
Table 3. AC characteristics
Symbol
Parameter⁽¹⁾
Min
Max
f_SCL
t_CH(2)
t_CHCL(3)
Serial clock input frequency
Clock high
Clock transition (fall time)
DC
2
200
1
t_CHDX
Serial clock input high to input data transition
50
t_CHEH
t_CL(2)
t_CLCH(3)
Serial clock input high to chip enable high
Clock low
Clock transition (rise time)
200
200
1
t_CLQV
Serial clock input low to output valid
150
t_CLQX
t_DHDL(3)
t_DLDH(3)
Serial clock input low to output data transition
Input data transition (fall time)
Input data transition (rise time)
0
1
1
t_DVCH
Input data to serial clock input high
40
t_EHCH
Chip enable high to serial clock input high
200
t_EHEL
t_EHQZ(3)
Chip enable high to chip enable low
Chip enable high to output high-z
200
250
t_ELCH
t_QHQL(3)
t_QLQH(3)
Chip enable low to serial clock input high
Output data transition (fall time)
Output data transition (rise time)
200
100
100
1. Valid for ambient operating temperature: T_A = –40 to 85°C; V_CC = 2.7 to 5.5 V (except where noted).
2. t_CH + t_CL ≥ 1/f_SCL
3. Value guaranteed by design, not 100% tested in production.
Unit
MHz
ns
µs
ns
ns
ns
µs
ns
ns
µs
µs
ns
ns
ns
ns
ns
ns
ns
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