MAX6909 MAXIM [Maxim Integrated Products], MAX6909 Datasheet - Page 32

• Manufacturer Part Number: MAX6909
• Description: I2C-Compatible Real-Time Clocks with uP Supervisor and NV RAM Controller
• Manufacturer: MAXIM [Maxim Integrated Products]

I
Supervisor and NV RAM Controller
32
2
C-Compatible Real-Time Clocks with µP
______________________________________________________________________________________
CE
RESET
MULTIFUNCTION
µCONTROLLER
ASIC
3.3V
3.3V
USER RESET
INTO
NMI
RST
RPU = t
PFO
CX FAIL
r
/C
BUS
3.3V
1kΩ
RPU
3.3V
47kΩ
12V
RPU
6.98kΩ
3.0V
V
CMOS
BATT
RAM
CE
0.1µF
1µF*
CE OUT
BATT
WDI
SCL
SDA
OUT
PFI
MR
MAX6909/
MAX6910
Typical Operating Circuit
PFO
PZT
BATT ON
V
X1
X2
ALM
CX FAIL
CE IN
RESET
RESET
CC
3.3V
V
BATT
* USE A LOW-LEAKAGE CAPACITOR.
150kΩ
CRYSTAL
3.3V
BATTERY-ON
INDICATOR
47kΩ
3.3V
0.01µF
47kΩ