参数资料
型号: DS1312S-2+
厂商: Maxim Integrated
文件页数: 1/12页
文件大小: 0K
描述: IC CTRLR NV W/BATT MOD 8-SOIC
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 100
控制器类型: 非易失性 RAM
电源电压: 4.75 V ~ 5.5 V
工作温度: -40°C ~ 85°C
封装/外壳: 8-SOIC(0.154",3.90mm 宽)
供应商设备封装: 8-SOIC
包装: 管件
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FEATURES
Converts CMOS SRAM into nonvolatile
memory
Unconditionally write-protects SRAM when
VCC is out of tolerance
Automatically switches to battery backup
supply when VCC power failure occurs
Monitors voltage of a lithium cell and
provides advanced warning of impending
battery failure
Signals low-battery condition on active low
Battery Warning output signal
Optional 5% or 10% power-fail detection
Space-saving 8-pin DIP and SOIC packages
Optional 16-pin SOIC and 20-pin TSSOP
versions reset processor when power failure
occurs and hold processor in reset during
system power-up
Industrial temperature range of -40°C to
+85°C
PIN ASSIGNMENT
PIN DESCRIPTION
VCCI
- +5V Power Supply Input
VCCO
- SRAM Power Supply Output
VBAT
- Backup Battery Input
CEI
- Chip Enable Input
CEO
- Chip Enable Output
TOL
- VCC Tolerance Select
BW
- Battery Warning Output
(Open Drain)
RST
- Reset Output (Open Drain)
GND
- Ground
NC
- No Connection
DESCRIPTION
The DS1312 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.
1
2
3
4
20
19
18
17
5
6
7
8
9
10
11
12
13
14
15
16
NC
VCCI
RST
NC
BW
NC
CEO
NC
CEI
NC
VCCO
NC
VBAT
NC
TOL
NC
GND
DS1312E 20-Pin TSSOP
1
2
3
4
8
7
6
5
GND
TOL
VBAT
VCCO
VCCI
BW
CEO
CEI
DS1312S-2 8-Pin SOIC
(150 mils)
1
2
3
4
8
7
6
5
GND
TOL
VBAT
VCCO
VCCI
BW
CEO
CEI
DS1312 8-Pin DIP
(300 mils)
1
2
3
4
16
15
14
13
5
6
7
8
9
10
11
12
NC
VCCO
NC
VBAT
NC
TOL
NC
GND
NC
VCCI
RST
NC
BW
CEO
NC
CEI
DS1312S 16-Pin SOIC
(300 mils)
DS1312
Nonvolatile Controller with Lithium Battery Monitor
19-6306; Rev 6/12
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