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AZ809ANSTR-G1

型号：

AZ809ANSTR-G1

品牌：

DIODES[ DIODES INCORPORATED ]

页数：

11 页

PDF大小：

374 K

下载PDF手册
Data Sheet  
3-PIN MICROPROCESSOR RESET CIRCUIT  
AZ809A  
General Description  
Features  
The AZ809A is a precision system supervisor and reset  
circuit designed to monitor the power supplies in  
microprocessor and digital system. It provides a reset  
signal to the host processor during power-up, power-  
down, and brownout conditions.  
·
Precise Monitoring of 3.0V, 3.3V, and 5.0V Sup-  
ply Voltages  
140ms Minimum Reset Pulse Width  
Active-low RESET Output  
Push-Pull RESET Output  
·
·
·
·
·
No External Components  
The AZ809A has an active-low RESET output, three  
standard reset options are offered to support 5V, 3.3V,  
and 3.0V system.Whenever the system supply voltage  
declines below the internal fixed reset threshold, the  
AZ809A asserts a reset signal and the reset signal  
Reset Valid Down to V =1.0V  
CC  
·
·
Power Supply Fast Transient Immunity  
Specified Over Full Temperature Range: -40 to  
105oC  
remains asserted for 240ms after V rises above the  
CC  
threshold.  
Applications  
The AZ809A has a push-pull output, no external com-  
ponents are required. The output is guaranteed to be in  
·
·
·
·
·
·
·
·
·
Microprocessor Systems  
Portable/Battery-Powered Systems  
Embedded Controllers  
Automotive  
Intelligent Instruments  
Wireless Communication Systems  
PDAs and Handheld Equipment  
Set-Top Boxes  
the correct state at V  
level as low as 1V. The  
CC  
AZ809A is optimized to reject fast transient glitches  
on the VCC line. When the V is 3.3V, the supply  
CC  
current consumption is about 6µA typically.  
The IC is available in SOT-23 package.  
ADSL Modems  
SOT-23  
Figure 1. Package Type of AZ809A  
Oct. 2010 Rev. 1. 3  
BCD Semiconductor Manufacturing Limited  
1
Data Sheet  
3-PIN MICROPROCESSOR RESET CIRCUIT  
AZ809A  
Pin Configuration  
N Package  
(SOT-23)  
RESET  
GND  
2
3
VCC  
1
Figure 2. Pin Configuration of AZ809A (Top View)  
Pin Description  
Pin Number  
Pin Name  
Function  
1
GND  
Ground pin  
Active low output. The RESET is asserted LOW if VCC falls below the reset threshold  
2
3
RESET  
and remains LOW for the 240ms typical reset timeout period (140ms minimum) after  
VCC exceeds the threshold  
VCC  
Power supply input voltage (3.0V, 3.3V, 5.0V)  
Oct. 2010 Rev. 1. 3  
BCD Semiconductor Manufacturing Limited  
2
Data Sheet  
3-PIN MICROPROCESSOR RESET CIRCUIT  
AZ809A  
Functional Block Diagram  
Reset  
Logic  
+
3
VCC  
2
RESET  
Timer  
1
GND  
Oscillator  
Reference  
Voltage  
Figure 3. Functional Block Diagram of AZ809A  
Ordering Information  
AZ809A  
-
E1: Lead Free  
G1: Green  
Circuit Type  
TR: Tape and Reel  
Reset Threshold:  
L: 4.63V  
S: 2.93V  
Package  
N: SOT-23  
R: 2.63V  
Temperature  
Range  
Reset  
Threshold  
Part Number  
Marking ID  
Packing  
Type  
Package  
Lead Free  
Green  
Lead Free  
Green  
GH7  
4.63V  
AZ809ANLTR-E1 AZ809ANLTR-G1 EH7  
AZ809ANSTR-E1 AZ809ANSTR-G1 EH1  
AZ809ANRTR-E1 AZ809ANRTR-G1 EH6  
-40 to 105oC  
SOT-23  
2.93V  
GH1  
GH6  
Tape & Reel  
2.63V  
BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant. Products with  
"G1" suffix are available in green package.  
Oct. 2010 Rev. 1. 3  
BCD Semiconductor Manufacturing Limited  
3
Data Sheet  
3-PIN MICROPROCESSOR RESET CIRCUIT  
AZ809A  
Absolute Maximum Ratings (Note 1)  
Parameter  
Symbol  
Value  
Unit  
V
Supply Voltage  
VCC  
-0.3 to 6  
RESET  
-0.3 to VCC+0.3  
V
Input Current, VCC Pin  
Output Current, RESET Pin  
Rate of Rise, VCC  
20  
20  
mA  
mA  
V/µs  
mW  
100  
Continuous Power Dissipation  
Junction Temperature  
Storage Temperature  
Lead Temperature (Soldering, 10sec)  
ESD (Human Body Model)  
ESD (Machine Model)  
320  
oC  
oC  
TJ  
150  
TSTG  
TLEAD  
-65 to 150  
260  
oC  
V
6000  
400  
V
Note 1: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to  
the device. These are stress ratings only, and functional operation of the device at these or any other conditions  
beyond those indicated under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Max-  
imum Ratings" for extended periods may affect device reliability.  
Recommended Operating Conditions  
Parameter  
Symbol  
VCC  
Min  
1
Max  
5.5  
Unit  
Supply Voltage  
V
oC  
Operating Ambient Temperature Range  
TA  
-40  
105  
Oct. 2010 Rev. 1. 3  
BCD Semiconductor Manufacturing Limited  
4
Data Sheet  
3-PIN MICROPROCESSOR RESET CIRCUIT  
AZ809A  
Electrical Characteristics  
o
o
(V is over the full voltage range, T =-40 C to 105 C, unless otherwise noted.  
CC  
A
o
Typical values at T =25 C, V =5V for L device, V =3.3V for S device and V =3V for R device.)(Note 2)  
A
CC  
CC  
CC  
Parameter  
Input Voltage (VCC) Range  
Symbol  
Conditions  
Min  
Typ  
Max  
5.5  
5.5  
11  
Unit  
TA=0oC to 85oC  
TA=-40oC to 105oC  
TA=-40oC to 85oC, VCC<5.5V  
1.0  
1.2  
VCC  
V
7
L Devices  
R/S Devices  
L Devices  
S Devices  
R Devices  
TA=-40oC to 105oC, VCC<5.5V  
TA=-40oC to 85oC, VCC<3.6V  
TA=-40oC to 105oC, VCC<3.6V  
12  
10  
11  
µA  
ICC  
Supply Current  
6
TA=25oC  
4.56  
4.50  
4.40  
2.89  
2.85  
2.78  
2.59  
2.55  
2.50  
4.63  
4.70  
4.75  
4.86  
2.96  
3.00  
3.08  
2.66  
2.70  
2.76  
TA=-40oC to 85oC  
TA=-40oC to 105oC  
TA=25oC  
TA=-40oC to 85oC  
TA=-40oC to 105oC  
TA=25oC  
2.93  
2.63  
V
VTH  
Reset Threshold  
TA=-40oC to 85oC  
TA=-40oC to 105oC  
Reset Threshold  
Temperature Coefficient  
TA=-40oC to 105oC  
o
30  
ppm/ C  
VCC to Reset Delay  
VCC=VTH to VTH-100mV  
TA=-40oC to 85oC  
TA=-40oC to 105oC  
20  
µs  
140  
100  
240  
560  
840  
Reset Active Timeout Period  
ms  
R/S Devices VCC=VTH(min), ISINK=1.2mA  
0.3  
0.4  
0.3  
VOL  
V
V
L Devices VCC=VTH(min), ISINK=3.2mA  
Low RESET Output Voltage  
High RESET Output Voltage  
VCC>1.1V, ISINK=50µA  
VCC>VTH(max),  
0.8VCC  
R/S Devices  
L Devices  
o
ISOURCE=500µA  
VOH  
VCC>VTH(max),  
VCC  
-
ISOURCE=800µA  
1.5  
Note 2. Production testing done at T =25 C. Over temperature specifications guaranteed by design only.  
A
Oct. 2010 Rev. 1. 3  
BCD Semiconductor Manufacturing Limited  
5
Data Sheet  
3-PIN MICROPROCESSOR RESET CIRCUIT  
AZ809A  
Typical Performance Characteristics  
12  
340  
320  
300  
280  
260  
240  
220  
200  
No Load  
11  
10  
VCC=5V  
9
8
7
VCC=3.3V  
6
5
4
3
2
1
VCC=1V  
0
-40.0  
-20.0  
0.0  
20.0  
40.0  
60.0  
80.0  
100.0 120.0  
-40.0  
-20.0  
0.0  
20.0  
40.0  
60.0  
80.0  
100.0 120.0  
Temperature (oC)  
Temperature (oC)  
Figure 4. Supply Current vs. Temperature  
Figure 5. Power-up Reset Timeout vs. Temperature  
240  
1.004  
1.003  
1.002  
1.001  
1.000  
0.999  
0.998  
0.997  
VCC=VTH to VTH-VOD  
220  
200  
180  
160  
140  
120  
100  
80  
VOD=10mV  
VOD=20mV  
60  
VOD=100mV  
VOD=200mV  
40  
20  
0
-40.0  
-20.0  
0.0  
20.0  
40.0  
60.0  
80.0  
100.0 120.0  
-40.0  
-20.0  
0.0  
20.0  
40.0  
60.0  
80.0  
100.0 120.0  
Temperature (oC)  
Temperature (oC)  
Figure 7. Normalized Reset Threshold vs. Temperature  
Figure 6. Power-down Reset Delay vs. Temperature  
Oct. 2010 Rev. 1. 3  
BCD Semiconductor Manufacturing Limited  
6
Data Sheet  
3-PIN MICROPROCESSOR RESET CIRCUIT  
AZ809A  
Typical Performance Characteristics (Continued)  
400  
360  
320  
280  
240  
200  
160  
120  
80  
400  
360  
320  
280  
240  
200  
160  
120  
80  
L Device  
S Device  
Reset Occurs  
above the Curve  
Reset Occurs  
above the Curve  
40  
40  
0
0
2
10  
100  
1000  
2
10  
100  
1000  
Reset Comparator Overdrive VTH-VCC (mV)  
Reset Comparator Overdrive VTH-VCC (mV)  
Figure 8. Maximum Transient Duration NOT Causing  
a Reset Pulse vs. Reset Comparator Overdrive  
Figure 9. Maximum Transient Duration NOT Causing  
a Reset Pulse vs. Reset Comparator Overdrive  
400  
360  
320  
280  
240  
200  
160  
120  
80  
R Device  
Reset Occurs  
above the Curve  
40  
0
2
10  
100  
1000  
Reset Comparator Overdrive VTH-VCC (mV)  
Figure 10. Maximum Transient Duration NOT Causing  
a Reset Pulse vs. Reset Comparator Overdrive  
Oct. 2010 Rev. 1. 3  
BCD Semiconductor Manufacturing Limited  
7
Data Sheet  
3-PIN MICROPROCESSOR RESET CIRCUIT  
AZ809A  
Operating Diagram  
VCC  
VTH  
VCC (min)  
Time  
RESET  
20µs  
Typical  
240ms  
240ms  
Typical  
Typical  
Reset Active  
Timeout Period  
Output  
Undefined  
Time  
The AZ809A asserts a reset signal LOW whenever the VCC supply voltage is below the threshold  
voltage and remains asserted for 240ms typically after the VCC has risen above the threshold.  
Figure 11. Reset Timing Diagram of AZ809A  
Application Information  
Valid RESET with V under 1.0 V  
CC  
The AZ809A RESET output is valid to V =1.0V.  
CC  
Below this voltage, the output becomes an open circuit  
and doesn't sink current. Therefore, high-impedance  
CMOS logic input connected to RESET can drift to  
undetermined voltages.  
VCC  
AZ809A  
To ensure that the AZ809A RESET is in a known state  
when V is under 1.0V, a 100KΩ pull-down resistor  
RESET  
GND  
CC  
between the RESET pin and GND is recommended to  
discharge stray capacitances and maintain the output  
low.  
R1  
100kΩ  
Figure 12. RESET Valid to VCC=0V  
Oct. 2010 Rev. 1. 3  
BCD Semiconductor Manufacturing Limited  
8
Data Sheet  
3-PIN MICROPROCESSOR RESET CIRCUIT  
AZ809A  
Application Information (Continued)  
Negative Going V Transient  
CC  
The AZ809A is optimized to immune fast negative-  
400  
360  
320  
280  
240  
200  
160  
120  
80  
VCC  
going transients or glitches on the V line, and the  
CC  
VTH  
sensitivity depends on the duration of the transient and  
the magnitude of the undershoot below the reset  
threshold (reset comparator overdrive). Figure 13  
shows the maximum pulse width of a negative-going  
Overdrive  
Duration  
V
transient that will not cause a reset pulse. As the  
CC  
magnitude of the transient increases (goes farther  
below the reset threshold), the maximum allowable  
pulse width decreases. Any combination of duration  
and overdrive that lies under the curve will not  
Reset Occurs  
above the Curve  
40  
generate a reset signal, typically, a V transient that  
CC  
0
2
10  
100  
1000  
goes 100mV below the reset threshold and lasts about  
20µs or less will not cause a reset pulse.  
Reset Comparator Overdrive VTH-VCC (mV)  
A 0.1µF bypass capacitor mounted as close as possible  
to the V  
pin will provide additional transient  
Figure 13. Maximum Transient Duration NOT Causing  
a Reset Pulse vs. Reset Comparator Overdrive  
CC  
rejection.  
Typical Application  
VCC  
VCC  
VCC  
AZ809A  
Microprocessor  
RESET  
RESET  
GND  
GND  
Figure 14. Typical Application of AZ809A  
Oct. 2010 Rev. 1. 3  
BCD Semiconductor Manufacturing Limited  
9
Data Sheet  
3-PIN MICROPROCESSOR RESET CIRCUIT  
AZ809A  
Mechanical Dimensions  
SOT-23  
Unit: mm(inch)  
0.100(0.004) GAUGE PLANE  
7.0°  
4×R0.100(0.004)  
3.0 °  
0.500(0.020)  
0.700(0.028)  
R0.100(0.004)  
0.900(0.035)  
1.100(0.043)  
7.0°  
~
0.0° 10.0°  
2.0°  
0.020(0.001)  
0.100(0.004)  
1.050(0.041)REF  
0.080(0.003)  
0.150(0.006)  
0.200(0.008)MIN  
0.550(0.022)REF  
2.800(0.110)  
3.000(0.118)  
1.200(0.047)  
1.400(0.055)  
2.300(0.091)  
2.500(0.098)  
0.390(0.015)  
0.450(0.018)  
0.920(0.036)  
0.980(0.039)  
1.900(0.075)REF  
Oct. 2010 Rev. 1. 3  
BCD Semiconductor Manufacturing Limited  
10  
BCD Semiconductor Manufacturing Limited  
http://www.bcdsemi.com  
- Headquarters  
- Wafer Fab  
BCD Semiconductor Manufacturing Limited  
Shanghai SIM-BCD Semiconductor Manufacturing Co., Ltd.  
No. 1600, Zi Xing Road, Shanghai ZiZhu Science-based Industrial Park, 200241, China  
800 Yi Shan Road, Shanghai 200233, China  
Tel: +86-21-24162266, Fax: +86-21-24162277  
Tel: +86-21-6485 1491, Fax: +86-21-5450 0008  
REGIONAL SALES OFFICE  
Shenzhen Office  
Taiwan Office  
USA Office  
Shanghai SIM-BCD Semiconductor Manufacturing Co., Ltd., Shenzhen Office  
BCD Semiconductor (Taiwan) Company Limited  
BCD Semiconductor Corp.  
Unit A Room 1203, Skyworth Bldg., Gaoxin Ave.1.S., Nanshan District, Shenzhen,  
4F, 298-1, Rui Guang Road, Nei-Hu District, Taipei,  
30920 Huntwood Ave. Hayward,  
China  
Taiwan  
Tel: +886-2-2656 2808  
CA 94544, USA  
Tel: +86-755-8826 7951  
Tel : +1-510-324-2988  
Fax: +86-755-8826 7865  
Fax: +886-2-2656 2806  
Fax: +1-510-324-2788  
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