ZSM300N8 [ZETEX]

SUPPLY VOLTAGE MONITOR; 电源电压监控器
ZSM300N8
型号: ZSM300N8
厂家: ZETEX SEMICONDUCTORS    ZETEX SEMICONDUCTORS
描述:

SUPPLY VOLTAGE MONITOR
电源电压监控器

电源电路 电源管理电路 光电二极管 监控 监视器
文件: 总5页 (文件大小:153K)
中文:  中文翻译
下载:  下载PDF数据表文档文件
SUPPLY VOLTAGE  
MONITOR  
ZSM300  
ISSUE 1 – NOVEMBER 1995  
DEVICE DESCRIPTION  
FEATURES  
The ZSM300 is a three terminal under  
voltage monitor circuit for use in  
microprocessor systems. The threshold  
voltage of the device has been set to 2.63  
volts making it ideal for 3 volt circuits.  
SO8, SOT223 and TO92 packages  
Power on reset generator  
Automatic reset generation  
Low standby current  
Guaranteed operation from 1 volt  
Wide supply voltage range  
Included in the device is a precise voltage  
reference and a comparator with built in  
hysteresis to prevent erratic operation. The  
ZSM300 features an open collector output  
capable of sinking at least l0mA which only  
requires a single external resistor to  
interface to following circuits.  
Internal clamp diode to discharge  
delay capacitor  
2.63 volt threshold for 3 volt logic  
20mV hysteresis prevents erratic operation  
APPLICATIONS  
Operation of the device is guaranteed from  
one volt upwards, from this level to the  
device threshold voltage the output is held  
low providing a power on reset function.  
Shouldthesupplyvoltage, onceestablished,  
at any time drop below the threshold level  
then the output again will pull low.  
Microprocessor systems  
Computers  
Computer peripherals  
Instrumentation  
Automotive  
Battery powered equipment  
The device is available in a TO92 package for  
through hole applicationsaswell asSO8 and  
SOT223 for surface mount requirements.  
SCHEMATIC DIAGRAM  
4-339  
ZSM300  
Power Dissipation  
TO92  
SOT223  
ABSOLUTE MAXIMUM RATING  
780mW  
2W(Note 2)  
780mW(Note 2)  
Input Supply Voltage  
Offstate Output Voltage  
-1 to 10V  
10V  
SO8  
Onstate Output  
Sink Current(Note 1)  
Internally limited  
100mA  
Clamp Diode  
Forward Current(Note 1)  
Operating Junction  
Temperature  
150°C  
Operating Temperature  
Storage Temperature  
-40 to 85°C  
-55 to 150°C  
TEST CONDITIONS  
amb  
COMPARATOR  
(T  
=25°C for typical values, T  
=-40 to 85°C for min/max values (Note3))  
amb  
MIN  
TYP.  
MAX.  
PARAMETER  
SYMBOL  
UNITS  
V
Threshold Voltage  
High state output (Vcc increasing)  
VIH  
2.56  
2.64  
2.7  
Threshold Voltage  
Low state output (Vcc decreasing)  
VIL  
VH  
2.56  
0.01  
2.62  
0.02  
2.7  
V
V
Hysteresis  
0.05  
OUPUT  
Output sink saturation:  
(Vcc=2.2V, Isink=8.0mA)  
(Vcc=2.2V, Isink=2.0mA)  
(Vcc=1.0V, Isink=0.1mA)  
VOL  
0.46  
0.15  
1.0  
0.4  
0.25  
60  
V
V
V
Onstate output sink current  
(Vcc , Output=2.2V)  
Isink  
Ioh  
Vf  
10  
27  
mA  
Offstate output leakage current  
(Vcc , Output=3V)  
0.02  
1.2  
2.5  
0.5  
1.5  
µA  
V
Clamp diode forward voltage  
(If=10mA)  
0.6  
Propagation delay  
Td  
µs  
(Vin 3V to 2.2V, Rl=10k, Tamb=25°C)  
TOTAL DEVICE  
Operating input voltage range  
Vcc  
Iq  
1.0 to 6.5  
V
Quiescent input current (Vcc=3V)  
125  
190  
µA  
Note:  
1. Maximum package power dissipation must be observed.  
2. Maximum power dissipation, for the SOT223 and SO8 packages, is calculated assuming  
that the device is mounted on a PCB measuring 2 inches square.  
3. Low duty cycle pulse techniques are used during test to maintain junction temperatures as  
close to ambient as possible.  
4-340  
ZSM300  
TYPICAL CHARACTERISTICS  
500  
400  
300  
200  
100  
0
5
R =10K  
TA =25 °C  
4
85 °C  
3
2
25 °C  
-40 °C  
1
0
0
2
4
6
8
10  
4
5
0
1
2
3
(V)  
Input Voltage  
(V)  
Input Voltage  
Input Current vs. Input Voltage  
Output Voltage vs. Input Voltage  
50  
40  
Vin=2.4V  
RL =10K  
3.0  
2.4  
2
30  
20  
Ϸ
-40 °C  
Ϸ
4
2
0
25 °C  
85 °C  
10  
0
3
1
4
0
2
0
0.4  
0.8  
1.2  
1.6  
2.0  
Time (µs)  
Output Saturation Voltage (V)  
Reset Delay Time  
Output Saturation Voltage vs. Sink Current  
100  
2.65  
2.64  
2.63  
Vin=0V  
Upper Threshold  
80  
60  
85 °C  
25 °C  
-40 °C  
40  
2.62  
2.61  
Lower Threshold  
20  
0
2.60  
-40  
0
0.4  
0.8  
1.2  
1.6  
2.0  
20  
-20  
0
40  
60  
80  
100  
Temperature (°C)  
Forward Voltage (V)  
Clamp Diode Forward Current vs. Voltage  
Threshold Voltage vs. Temperature  
4-341  
ZSM300  
TIMING DIAGRAM  
Vcc  
Threshold  
Voltage  
1 V  
Output  
Output  
Output  
Undefined  
Undefined  
APPLICATION CIRCUIT  
Note 4: A time delayed reset can be accomplished with the additional Cd.  
1
TDY =Time (Seconds)  
VTH =Microprocessor Reset Threshold  
Vin =Power Supply Voltage  
TDY = RCd ln  
VTH(mpu)  
1 −  
Vin  
4-342  
ZSM300  
CONNECTION DIAGRAMS  
SO8 Package Suffix – N8  
SOT223 Package Suffix – G  
Top View  
Top View –  
Pin 4 floating or connected to pin 2  
TO92 Package Suffix – C  
Bottom View  
ORDERING INFORMATION  
Part Number  
ZSM300N8  
ZSM300G  
Package  
SO8  
Part Mark  
ZSM300  
ZSM300  
ZSM300  
SOT223  
TO92  
ZSM300C  
4-343  

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