MAX6909 MAXIM [Maxim Integrated Products], MAX6909 Datasheet - Page 19

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

Table 5. MAX6910 I/O and IC Sections Powered from V
Crystal Oscillator I/O
Crystal Oscillator I/O
Backup Power-Supply Input
OUT (> of V
Manual Reset Input
Battery-On Output
Watchdog Input
Chip-Enable Input
Power-Fail Input
Ground
Active Low, Open-Drain Reset Output
(-OD)
Active High, Push/Pull Reset Output
Chip-Enable Output
Power-Fail Output
Alarm Output
Piezo Output
Crystal-Fail Output
2-Wire Bus Data I/O
2-Wire Bus Clock
Main Power-Supply Input
Trickle Charge
FEATURES
Crystal Oscillator
RAM
Timekeeping Registers
Control Registers
Crystal Fail Detect
Alarm Registers
Power-Fail Comparator
RESET Comparator
Watchdog Timer
Internal Reference
Power Switchover
CE Circuitry
Piezo Dividers/Select Register
Trickle Charge
CC
DESCRIPTION
or BATT if V
I
2
______________________________________________________________________________________
C-Compatible Real-Time Clocks with µP
CC
< V
RESET
Supervisor and NV RAM Controller
)
1 to 20
PIN
10
18
19
17
16
14
15
11
12
13
20
9
1
2
6
3
7
4
5
8
PIN NAME
BATT ON
CE OUT
CX FAIL
RESET
RESET
CE IN
BATT
GND
OUT
ALM
PFO
SDA
WDI
SCL
V
PZT
MR
PFI
X1
X2
CC
POWER =
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
V
N/A
N/A
N/A
N/A
CC
CC
Disabled
Disabled
Disabled
Disabled
Disabled
Disabled
Disabled
Disabled
Disabled
Disabled
Disabled
Disabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
V
V
N/A
N/A
N/A
N/A
CC
and BATT
RST
<
Disabled in BATT
High impedance
Pulled to OUT
Input ignored
Input ignored
Input ignored
Input ignored
Pulled to V
COMMENTS
V
Pulled low
Pulled low
CC
< V
RST
CC
Supply = OUT
Supply = OUT
Supply = OUT
Supply = OUT
Supply = OUT
Supply = OUT
Supply = OUT
Supply = OUT
Supply = OUT
Supply = OUT
Supply = OUT
Supply = V
Supply = V
Supply = V
COMMENTS
Power output
Power pin
Power pin
Power pin
pin
CC
CC
CC
19