m41t64 STMicroelectronics, m41t64 Datasheet - Page 27

• Manufacturer Part Number: m41t64
• Description: Serial Access Real-time Clock With Alarms
• Manufacturer: STMicroelectronics

Table 16. Oscillator Characteristics
Note: 1. Reference value. T
Figure 27. Bus Timing Requirements Sequence
Table 17. AC Characteristics
Note: 1. Valid for Ambient Operating Temperature: T
Symbol
t
V
SU:DAT
t
t
t
t
t
STA
C
C
SU:STO
HD:STA
SU:STA
HD:DAT
STA
t
Sym
t
t
f
HIGH
2. Transmitter must internally provide a hold time to bridge the undefined region (300ns max) of the falling edge of SCL.
LOW
g
d
BUF
t
SCL
t
rec
t
R
F
(2)
SDA
SCL
Oscillator Start Voltage
Oscillator Start Time
XIN
XOUT
IC-to-IC Frequency Variation
SCL Clock Frequency
Clock Low Period
Clock High Period
SDA and SCL Rise Time
SDA and SCL Fall Time
START Condition Hold Time
(after this period the first clock pulse is generated)
START Condition Setup Time
(only relevant for a repeated start condition)
Data Setup Time
Data Hold Time
STOP Condition Setup Time
Time the bus must be free before a new
Watchdog Output Pulse Width
transmission can start
tBUF
Parameter
P
A
= 25° C, V
S
CC
Parameter
= 3.0V, CMJ-145 (C
tHD:STA
(1)
tR
A
= –40 to 85°C; V
(1)
tLOW
tHIGH
Conditions
V
tF
10 seconds
CC
L
= 6pF, 32,768Hz) manufactured by Citizen.
= 3.0V
CC
tHD:DAT
= 1.3 to 3.6V (except where noted).
tSU:DAT
Min
–10
1.5
Min
600
600
600
100
600
1.3
1.3
96
0
0
SR
Typ
12
12
tSU:STA
Typ
tHD:STA
M41T62/63/64/65
Max
+10
Max
400
300
300
98
1
P
AI00589
tSU:STO
Units
kHz
Unit
ppm
ms
µs
ns
ns
ns
ns
ns
ns
µs
ns
µs
pF
pF
27/33
V
s