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M48T86 数据表(PDF) 2 Page - STMicroelectronics

部件名 M48T86
功能描述  5V PC REAL TIME CLOCK
PDF  23 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

M48T86 数据表(HTML) 2 Page - STMicroelectronics

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Figure 2. DIP Connections
AD4
AD5
AD6
NC
AD1
AD2
AD3
NC
AD0
SQW
RST
NC
RCL
NC
NC
IRQ
DS
AS
AD7
VSS
E
R/W
MOT
VCC
AI01641
M48T86
8
1
2
3
4
5
6
7
9
10
11
12
13
14
16
15
24
23
22
21
20
19
18
17
Figure 3. SOIC Connections
AI01642
8
2
3
4
5
6
7
9
10
11
12
13
14
22
21
20
19
18
17
16
15
24
23
1
AD4
AD5
AD6
NC
AD1
AD2
AD3
AD0
SQW
RST
NC
RCL
NC
NC
IRQ
DS
AS
AD7
VSS
E
R/W
MOT
VCC
M48T86
NC
NC
NC
NC
26
25
28
27
VSS
Table 1. Signal Names
AD0-AD7
Multiplexed Address/Data Bus
E
Chip Enable Input
R/W
Write Enable Input
DS
Data Strobe Input
AS
Address Strobe Input
RST
Reset Input
RCL
RAM Clear Input
MOT
Bus Type Select Input
SQW
Square Wave Output
IRQ
Interrupt Request Output
VCC
Supply Voltage
VSS
Ground
NC
Not Connected Internally
DESCRIPTION
The M48T86 is an industry standard real time
clock (RTC).The M48T86 is composed of a lithium
energy source, quartz crystal, write-protection cir-
cuitry, and a 128 byte RAM array. This provides
the user with a complete subsystem packaged in
either a 24-pin DIP CAPHAT or 28-pin SNAPHAT
SOIC. Functions available to the user include a
non-volatile time-of-day clock, alarm interrupts, a
one-hundred-year clock with programmable inter-
rupts, square wave output, and 128 bytes of non-
volatile static RAM.
The 24 pin 600mil DIP CAPHAT™ houses the
M48T86 silicon with a quartz crystal and a long life
lithium button cell in a single package.
The 28 pin 330mil SOIC provides sockets with
gold plated contacts at both ends for direct con-
nection to a separate SNAPHAT housing contain-
ing the battery and crystal. The unique design
allows the SNAPHAT battery package to be
mounted on top of the SOIC package after the
completion of the surface mount process.
Insertion of the SNAPHAT housing after reflow
prevents potential battery and crystal damage due
to the high temperatures required for device sur-
face-mounting. The SNAPHAT housing is keyed
to prevent reverse insertion.
The SOIC and battery packages are shipped sep-
arately in plastic anti-static tubes or in Tape & Reel
form.



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