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PDF DS1283 Data sheet ( Hoja de datos )
| Número de pieza | DS1283 | |
| Descripción | Watchdog Timekeeper Chip | |
| Fabricantes | Dallas Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de DS1283 (archivo pdf) en la parte inferior de esta página. Total 5 Páginas | ||
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DS1283
DS1283
Watchdog Timekeeper Chip
FEATURES
• Keeps track of hundredths of seconds, seconds, min-
utes, hours, days, date of the month, months, and
years; valid leap year compersation up to 2100
• Watchdog timer restarts an out–of–control processor
• Alarm function provides notice of real time related oc-
currences
www.•DDateasSighneeedt4fUor.cboamttery operation
• Programmable interrupts and square wave outputs
maintain 28–pin JEDEC footprint
• All registers are individually addressable via the ad-
dress and data bus
• Accuracy is better than ±2 minutes/month at 25°C
• 50 bytes of user nonvolatile RAM
• Optional 28–pin SOIC surface mount package
• Low–power CMOS circuitry is maintained on less
than 1 µA in standby mode
• Optional industrial temperature range –40°C to +85°C
DESCRIPTION
The DS1283 Watchdog Timekeeper Chip is a self–con-
tained real time clock, alarm, watchdog timer, and inter-
val timer in a 28–pin JEDEC DIP or 28–pin SOIC sur-
face mount package. The DS1283 is specifically
designed to maintain internal operations from a single
low voltage supply. In fact, the only two external compo-
nents required by the DS1283 are a battery and crystal.
For a complete description of operating conditions,
electrical characteristics, bus timing, and pin descrip-
tions other than X1, X2, VBAT, VCC, RCLR, INTB, and
INTP see the DS1286 Watchdog Timekeeper data
sheet.
PIN ASSIGNMENT
INTA
X1
X2
NC
A5
1
2
3
4
5
28 VCC
27 WE
26 INTB(INTB)
25 VBAT
24 RCLR
A4 6
23 SQW
A3
A2
A1
A0
DQ0
DQ1
DQ2
GND
7 22 OE
8 21 INTP
9 20 CE
10 19 DQ7
11 18 DQ6
12 17 DQ5
13 16 DQ4
14 15 DQ3
DS1283
28–PIN DIP (600 MIL)
INTA
X1
X2
NC
A5
A4
A3
A2
A1
A0
DQ0
DQ1
DQ2
1
2
3
4
5
6
7
8
9
10
11
12
13
28 V CC
27 WE
26 INTB(INTB)
25 VBAT
24 RCLR
23 SQW
22 OE
21 INTP
20 CE
19 DQ7
18 DQ6
17 DQ5
16 DQ4
GND
14
15 DQ3
DS1283S
28–PIN SOIC (330 MIL)
NOTE: Pin 4 must be left disconnected.
ECopyright 1997 by Dallas Semiconductor Corporation.
All Rights Reserved. For important information regarding
patents and other intellectual property rights, please refer to
Dallas Semiconductor data books.
032697 1/5
1 page  
DS1283 28–PIN SOIC
KG
www.DataSheet4U.com
E
A
B
0–8 deg. typ. J
H
D
C
F
DS1283
PKG
DIM
A IN.
MM
B IN.
MM
C IN.
MM
D IN.
MM
E IN.
MM
F IN.
MM
G IN.
MM
H IN.
MM
J IN.
MM
K IN.
MM
28–PIN
MIN MAX
0.706
17.93
0.728
18.49
0.338
8.58
0.350
8.89
0.086
2.18
0.110
2.79
0.020
0.58
0.050
1.27
0.002
0.05
0.014
0.36
0.090
2.29
0.050
1.27
0.124
3.15
BSC
0.460
11.68
0.480
12.19
0.006
0.15
0.013
0.33
0.014
0.36
0.020
0.51
032697 5/5
5 Page | ||
| Páginas | Total 5 Páginas | |
| PDF Descargar | [ Datasheet DS1283.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| DS1283 | Watchdog Timekeeper Chip | Dallas Semiconductor |
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| DS1284 | (DS1284 / DS1286) Watchdog Timekeepers | Dallas Semiconductor |
| DS1284 | (DS1284 / DS1286) Watchdog Timekeepers | Dallas Semiconductor |
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