M41T0_08 STMICROELECTRONICS [STMicroelectronics], M41T0_08 Datasheet - Page 5

• Manufacturer Part Number: M41T0_08
• Description: Serial real-time clock
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

1
Description
The M41T0 real-time clock is a low power serial real-time clock with a built-in 32.768 kHz
oscillator (external crystal controlled). Eight registers are used for the clock/calendar
function and are configured in binary coded decimal (BCD) format. Addresses and data are
transferred serially via a two-line bidirectional bus. The built-in address register is
incremented automatically after each WRITE or READ data byte.
The M41T0 is supplied in 8-lead plastic small outline package.
Figure 1.
Figure 2.
1. NF pin must be tied to V
Table 1.
1. NF pin must be tied to V
OSCI
OCSO
OUT
SDA
SCL
NF
V
V
CC
SS
(1)
Logic diagram
SOIC connections
Signal names
SS
SS
.
.
OSCI
Oscillator input
Oscillator output
Output driver (open drain)
Serial data address input / output
Serial clock
No function
Supply voltage
Ground
SCL
OSCO
NF (1)
OSCI
V SS
V CC
V SS
M41T0
1
2
3
4
M41T0
AI07029
8
7
6
5
V CC
OUT
SCL
SDA
OSCO
SDA
OUT
AI07028
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