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参数资料
| 型号： | DS1238S+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/14页 |
| 文件大小： | 0K |
| 描述： | IC MICROMAN W/FRESH 10% 16-SOIC |
| 标准包装： | 1,000 |
| 系列： | MicroManager |
| 类型： | 备用电池电路 |
| 监视电压数目： | 1 |
| 输出： | 开路漏极，推挽式 |
| 复位： | 高有效/低有效 |
| 复位超时： | 最小为 40 ms |
| 电压 - 阀值： | 4.37V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 16-SOIC W |
| 包装： | 带卷 (TR) |
DS1238
MicroManager
www.dalsemi.com
FEATURES
Holds microprocessor in check during power
PIN ASSIGNMENT
transients
Halts and restarts an out-of-control
VBAT
VCCO
1
2
16
15
RST
RST
microprocessor
Warns microprocessor of an impending power
failure
Converts CMOS SRAM into nonvolatile
memory
Unconditionally write-protects memory when
power supply is out of tolerance
Delays write protection until completion of
VCC
GND
PF
RVT
OSCIN
OSCSEL
3
4
5
6
7
8
14
13
12
11
10
9
WDS
CEI
CEO
ST
NMI
IN
VBAT
VCCO
VCC
GND
PF
RVT
OSCIN
OSCSEL
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
RST
RST
WDS
CEI
CEO
ST
NMI
IN
the current memory cycle
Consumes less than 200 nA of battery current
Controls external power switch for high
current applications
Debounces pushbutton reset
16-Pin DIP (300-mil)
See Mech. Drawings Section
PIN DESCRIPTION
16-Pin SOIC (300-mil)
See Mech. Drawings Section
Accurate 10% power supply monitoring
Optional 5% power supply monitoring
designated DS1238-5
Provides orderly shutdown in microprocessor
applications
Pin-for-pin compatible with MAX691
Standard 16-pin DIP or space-saving 16-pin
SOIC
Optional industrial temperature range -40 ° C
to +85 ° C
V BAT
V CCO
V CC
GND
PF
RVT
OSCIN
OSCSEL
IN
NMI
ST
CEO
CEI
WDS
RST
RST
- +3-Volt Battery Input
- Switched SRAM Supply Output
- +5-Volt Power Supply Input
- Ground
- Power-Fail
- Reset Voltage Threshold
- Oscillator In
- Oscillator Select
- Early Warning Input
- Non-Maskable Interrupt
- Strobe Input
- Chip Enable Output
- Chip Enable Input
- Watchdog Status
- Reset Output (active low)
- Reset Output (active high)
DESCRIPTION
The DS1238 MicroManager provides all the necessary functions for power supply monitoring, reset
control, and memory backup in microprocessor-based systems. A precise internal voltage reference and
comparator circuit monitor power supply status. When an out-of-tolerance condition occurs, the
microprocessor reset and power-fail outputs are forced active, and static RAM control unconditionally
write protects external memory. The DS1238 also provides early warning detection of a user-defined
threshold by driving a non-maskable interrupt. External reset control is provided by a pushbutton reset
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS-1238ZJ | 制造商:HIKVISION 功能描述:BRACKET PENDANT FOR 51XX/7XX DOME CAMERAS |
| DS1239 | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:MicroManager Chip |
| DS1239-10 | 功能描述:监控电路 RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| DS1239-10+ | 功能描述:监控电路 RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| DS1239-10N | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog IC |
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