MAX793R, MAX793S, MAX793T 3.0V/3.3V可调、微处理器监控电路

MAX793R, MAX793S, MAX793T：3.0V/3.3V可调、微处理器监控电路

功能完备的电池备份IC，用于3V/3.3V系统

The MAX793/MAX794/MAX795 microprocessor (µP) supervisory circuits monitor and control the activities of +3.0V/+3.3V µPs by providing backup-battery switchover, among other features such as low-line indication, µP reset, write protection for CMOS RAM, and a watchdog (see the Selector Guide in the full data sheet). The backup-battery voltage can exceed VCC, permitting the use of 3.6V lithium batteries in systems using 3.0V to 3.3V for VCC. The MAX793/MAX795 offer a choice of reset threshold voltage range (denoted by suffix letter): 3.00V to 3.15V (T), 2.85V to 3.00V (S), and 2.55V to 2.70V (R). The MAX794's reset threshold is set externally with a resistor divider. The MAX793/MAX794 are available in 16-pin DIP and narrow SO packages, and the MAX795 comes in 8-pin DIP and SO packages.

关键特性

Precision Supply-Voltage Monitor:
- Fixed Reset Trip Voltage (MAX793/MAX795)
- Adjustable Reset Trip Voltage (MAX794)
Guaranteed Reset Assertion to VCC = 1V
Backup-Battery Power Switching—Battery Voltage Can Exceed VCC
On-Board Gating of Chip-Enable Signals—7ns Max Propagation Delay
Battery Freshness Seal
Battery OK Output (MAX793)
Uncommitted Voltage Monitor for Power-Fail or Low-Battery Warning
Independent Watchdog Timer (1.6s timeout)
Manual Reset Input

MAX793、MAX793R、MAX793S、MAX793T、MAX794、MAX795、MAX795R、MAX795S、MAX795T：典型工作电路

应用

电池供电计算机/控制器
精确的µP电源监控
嵌入式控制器
智能控制器
便携式设备

数据手册DataSheet

语言	下载文件	备注
英文	MAX793-MAX795T.pdf	Rev 6; 03/2010

关键参数

Part Number	Reset Thresh. (V)	Reset Out	I_CC (µA)	Oper. Temp. (°C)	Package/Pins	Budgetary Price
Part Number	Reset Thresh. (V)	Reset Out	max	Oper. Temp. (°C)	Package/Pins	See Notes
MAX793	2.5 to 3.3	Active High Active Low Open Drain Push-Pull	60	-40 to +85 0 to +70	PDIP(N)/16 SOIC(N)/16	$4.46 @1k
MAX794	1.2 to 1.8 1.8 to 2.5 2.5 to 3.3 3.3 to 5.5	Active High Active Low Open Drain Push-Pull	60		PDIP(N)/16 SOIC(N)/16	$4.32 @1k
MAX795	2.5 to 3.3	Active Low Open Drain	50		PDIP(N)/8 SOIC(N)/8	$3.73 @1k

质量和环境数据

MAX793T.pdf

订购型号

型号	状况	推荐替代产品	封装	温度	RoHS/无铅
MAX793RCPE	停止供货	MAX793RCPE+	PDIP(N),；16引脚；158.4mm²	0°C至+70°C	RoHS/无铅：否
MAX793RCPE+	生产中		PDIP(N),；16引脚；158.4mm²	0°C至+70°C	RoHS/无铅：无铅
MAX793RCSE	停止供货	MAX793RCSE+	SOIC(N),；16引脚；61.9mm²	0°C至+70°C	RoHS/无铅：否
MAX793RCSE+	生产中		SOIC(N),；16引脚；61.9mm²	0°C至+70°C	RoHS/无铅：无铅
MAX793RCSE+T	生产中		SOIC(N),；16引脚；61.9mm²	0°C至+70°C	RoHS/无铅：无铅
MAX793RCSE-T	停止供货	MAX793RCSE+T	SOIC(N),；16引脚；61.9mm²	0°C至+70°C	RoHS/无铅：否
MAX793REPE	停止供货	MAX793REPE+	PDIP(N),；16引脚；158.4mm²	-40°C至+85°C	RoHS/无铅：否
MAX793REPE+	生产中		PDIP(N),；16引脚；158.4mm²	-40°C至+85°C	RoHS/无铅：无铅
MAX793RESE	停止供货	MAX793RESE+	SOIC(N),；16引脚；61.9mm²	-40°C至+85°C	RoHS/无铅：否
MAX793RESE+	生产中		SOIC(N),；16引脚；61.9mm²	-40°C至+85°C	RoHS/无铅：无铅
型号	状况	推荐替代产品	封装：类型引脚占位面积封装图编码/变更 *	温度	RoHS/无铅？
MAX793RESE+T	生产中		SOIC(N),；16引脚；61.9mm²	-40°C至+85°C	RoHS/无铅：无铅
MAX793RESE-T	停止供货	MAX793RESE+T	N.SO；16引脚	-40°C至+85°C	参考数据资料