ds1314st-r-c03 Maxim Integrated Products, Inc., ds1314st-r-c03 Datasheet
ds1314st-r-c03
Manufacturer Part Number
ds1314st-r-c03
Description
Ds1314 3v Nonvolatile Controller With Lithium Battery Monitor
Manufacturer
Maxim Integrated Products, Inc.
Datasheet
1.DS1314ST-R-C03.pdf
(11 pages)
FEATURES
§ Converts CMOS SRAM into nonvolatile
§ Unconditionally write-protects SRAM when
§ Automatically switches to battery backup
§ Monitors voltage of a lithium cell and
§ Signals low-battery condition on active low
§ Automatic V
§ Space-saving 8-pin DIP and SOIC packages
§ Optional 16-pin SOIC and 20-pin TSSOP
§ Industrial temperature range of -40°C to
DESCRIPTION
The DS1314 Nonvolatile Controller with Battery Monitor is a CMOS circuit which solves the application
problem of converting CMOS RAM into nonvolatile memory. Incoming power is monitored for an out-
of-tolerance condition. When such a condition is detected, chip enable is inhibited to accomplish write
protection and the battery is switched on to supply the RAM with uninterrupted power. Special circuitry
uses a low-leakage CMOS process which affords precise voltage detection at extremely low battery
consumption.
www.maxim-ic.com
memory
V
supply when V
provides advanced warning of impending
battery failure
Battery Warning output signal
or 3.3V power supplies
versions reset processor when power failure
occurs and hold processor in reset during
system power-up
+85°C
CC
is out of tolerance
CC
CC
power-fail detection for 3.0V
power failure occurs
1 of 11
GND
V
V
TOL
GND
V
V
TOL
NC
CCO
NC
NC
NC
BAT
CCO
BAT
DS1314S 16-Pin SOIC
DS1314 8-Pin DIP
PIN ASSIGNMENT
PIN DESCRIPTION
V
V
V
TOL
GND
NC
CEI
CEO
BW
RST
CCI
CCO
BAT
1
2
3
4
1
2
3
4
5
6
7
8
(300-mil)
(300-mil)
3V Nonvolatile Controller with
16
15
14
13
12
10
11
8
7
6
5
9
V
BW
CEO
CEI
- Power Supply Input
- SRAM Power Supply Output
- Backup Battery Input
- Chip Enable Input
- Chip Enable Output
- V
- Battery Warning Output
- Reset Output (Open Drain)
- Ground
- No Connection
NC
V
RST
NC
BW
CEO
NC
CEI
CCI
Lithium Battery Monitor
CCI
(Open Drain)
CC
Tolerance Select
GND
V
GND
V
TOL
V
V
TOL
CCO
BAT
NC
CCO
NC
NC
NC
NC
BAT
NC
DS1314E 20-Pin TSSOP
DS1314S-2 8-Pin SOIC
1
2
3
4
5
6
7
8
9
10
1
2
3
4
(150-mil)
DS1314
13
20
19
18
17
16
15
14
12
11
8
7
6
5
070505
NC
V
RST
NC
NC
BW
NC
CEO
NC
CEI
V
BW
CEO
CEI
CCI
CCI
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