Datasheet

Figure 5. M41T64 connections
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
NC NC NC
NC NC NC
XI
XO
F
32K
(1)
V
SS
V
SS
V
CC
NC
SCL
SDA
SQW
(2)
1. Enabled on power-up.
2. Open drain.
Figure 6. M41T65 connections
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
NC NC NC
NC NC NC
XI
XO
WDO
(1)
V
SS
V
SS
V
CC
NC
SCL
SDA
IRQ/FT/OUT
(1)
1. Open drain.
Table 2. Signal names
XI
Oscillator input
XO Oscillator output
SDA Serial data input/output
SCL Serial clock input
IRQ /OUT Interrupt or OUT output (open drain)
IRQ /FT/OUT Interrupt, frequency test, or OUT output (open drain)
SQW Programmable square wave - defaults to 32 kHz on power-up (open drain for M41T64 only)
F
32K
Dedicated 32 kHz output (M41T64 only)
WDO Watchdog timer output (open drain)
V
CC
Supply voltage
V
SS
Ground
M41T62, M41T64, M41T65
Description
DS3840 - Rev 24
page 4/42