 English |
|
|
|
|
|
|
|
| DS1631 Datasheet, PDF (1/19 Pages) National Semiconductor (TI) – CMOS Dual Peripheral Drivers | |||
| |||
|
www.maxim-ic.com
www.maxim-ic.com
FEATURES
§ Real-time clock (RTC) keeps track of
hundredths of seconds, minutes, hours, days,
date of the month, months, and years
§ 32k x 8 NV SRAM directly replaces volatile
static RAM or EEPROM
§ Embedded lithium energy cell maintains
calendar operation and retains RAM data
§ Watch function is transparent to RAM
operation
§ Month and year determine the number of
days in each month; valid up to 2100
§ Full 10% operating range
§ Operating temperature range: 0°C to +70°C
§ Over 10 years of data retention in the
absence of power
§ Lithium energy source is electrically
disconnected to retain freshness until power
is applied for the first time
§ DIP module only
§ Standard 28-pin JEDEC pinout
§ PowerCap® module board only
â Surface mountable package for direct
connection to PowerCap containing
battery and crystal
â Replaceable battery (PowerCap)
â Pin-for-pin compatible with DS1248P
and DS1251P
§ Underwriters Laboratory (UL) recognized
DS1244/DS1244P
256k NV SRAM
with Phantom Clock
PIN ASSIGNMENT (Top View)
A14/RST 1
A12 2
A7 3
A6 4
A5 5
A4 6
A3 7
A2 8
A1 9
A0 10
DQ0 11
DQ1 12
DQ2 13
GND 14
28
VCC
27
WE
26 A13
25 A8
24 A9
23 A11
22 OE
21 A10
20 CE
19 DQ7
18 DQ6
17 DQ5
16 DQ4
15 DQ3
DS2144
28-PDIP Module (740mil)
RST 1
34
N.C. 2
33
N.C. 3
N.C. 4
VCC
5
32
31
30
WE 6
29
OE
CE
DQ7
7
8
9
28
27
26
DQ6 10
25
DQ5 11
DQ4 12
24
23
DQ3 13
22
DQ2
DQ1
DQ0
14
21
15
16
X1 GND VBAT X2
20
19
GND 17
18
N.C.
N.C.
A14
A13
A12
A11
A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
DS1244P
34-Pin PowerCap Module
(Uses DS9034PCX PowerCap)
Package Dimension Information
http://www.maxim-ic.com/TechSupport/DallasPackInfo.htm
PowerCap is a registered trademark of Dallas Semiconductor.
Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device
may be simultaneously available through various sales channels. For information about device errata, click here: http://www.maxim-ic.com/errata.
1 of 19
081902
|
▷ |
German
Russian
Spanish
Italian
Polish
Chinese
Japanese
Korean
French
Portuguese