MAX6909EO33 Maxim Integrated, MAX6909EO33 Datasheet - Page 32

• Manufacturer Part Number: MAX6909EO33
• Description: Real Time Clock
• Manufacturer: Maxim Integrated
• Series: MAX6909, MAX6910r

Specifications of MAX6909EO33

• Function: Clock, Calendar, Watchdog Timekeeper, NV SRAM Control
• Rtc Bus Interface: Serial
• Time Format: HH
• Rtc Memory Size: 31 B
• Supply Voltage - Max: 3.6 V
• Supply Voltage - Min: 3 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Package / Case: QSOP-20

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