DS1833Z-5+T&R [MAXIM]
Power Supply Support Circuit, Fixed, 1 Channel, +4.63VV, CMOS, PDSO4, ROHS COMPLIANT, SOT-223, 4 PIN;
| 型号： | DS1833Z-5+T&R |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Power Supply Support Circuit, Fixed, 1 Channel, +4.63VV, CMOS, PDSO4, ROHS COMPLIANT, SOT-223, 4 PIN 电源电路 电源管理电路 光电二极管 |
| 文件： | 总5页 (文件大小：120K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
DS1833
5V EconoReset
www.maxim-ic.com
FEATURES
PIN ASSIGNMENT
C Automatically restarts microprocessor after
power failure
1
DALLAS
DS1833
Econo
C Maintains active-high reset for 350 ms after
Reset
V
CC returns to an in-tolerance condition
C Accurate 5%, 10% or 15% microprocessor 5V
power supply monitoring
2
4
C Reduces need for discrete components
C Precision temperature-compensated voltage
reference and voltage sensor
TOP VIEW
SOT-23 PACKAGE
See Mech.
Drawings Section
On Website
1 2 3
1 2 3
C Low-cost TO-92 package or surface mount
SOT-223 package
C Internal 5k pull-up resistor
C Operating temperature of -40LC to +85LC
BOTTOM VIEW
TO-92 PACKAGE
See Mech.
Drawings Section
On Website
PIN DESCRIPTION
PIN 1
PIN 2
PIN 3
PIN 4
Ground
Reset
VCC
Ground (SOT-223 only)
DESCRIPTION
The DS1833 EconoReset uses a precision temperature compensated reference and comparator circuit to
monitor the status of the power supply (VCC). When an out-of-tolerance condition is detected, an internal
power fail signal is generated which forces reset to the active (high) state. When VCC returns to an in-
tolerance condition, the reset signal is kept in the active state for approximately 350 ms to allow the
power supply and processor to stabilize.
OPERATION - POWER MONITOR
The DS1833 provides the functions of detecting out-of-tolerance power supply conditions and warning a
processor-based system of impending power failure. When VCC is detected as out-of-tolerance, as
defined by the tolerance of the part selected, the RST signal is asserted. On power-up, RST is kept active
for approximately 350 ms after the power supply has reached the selected tolerance. This allows the
power supply and microprocessor to stabilize before RST is released.
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041002
DS1833
BLOCK DIAGRAM Figure 1
APPLICATION EXAMPLE Figure 2
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DS1833
POWER-UP Figure 3
POWER-DOWN Figure 4
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DS1833
ABSOLUTE MAXIMUM RATINGS*
Voltage on VCC Pin Relative to Ground
Voltage on I/O Relative to Ground
Operating Temperature
-0.5V to +7.0V
-0.5V to VCC +0.5V
-40LC to +85LC
Storage Temperature
-55LC to +125LC
260LC for 10 seconds
Soldering Temperature
* This is a stress rating only and functional operation of the device at these or any other conditions
above those indicated in the operation sections of this specification is not implied. Exposure to
absolute maximum rating conditions for extended periods of time may affect reliability.
RECOMMENDED DC OPERATING CONDITIONS
(-40LC to +85LC)
PARAMETER
SYMBOL MIN
VCC 1.2
TYP
5.0
MAX
5.5
UNITS NOTES
Supply Voltage
V
1
DC ELECTRICAL CHARACTERISTICS
(-40LC to +85LC; VDD=5V M 10%)
PARAMETER
SYMBOL MIN
TYP
MAX
UNITS NOTES
Low Level @ RST
Output Current @ 0.4V
Operating Current
VCC Trip Point 5%
VCC Trip Point 10%
VCC Trip Point 15%
Output Capacitance
Internal Pull-Up Resistor
VOL
IOL
ICC
VCCTP1
VCCTP2
VCCTP3
COUT
RP
0.4
V
mA
mA
V
V
V
1
+8
1.5
2
4.5
4.25
4.0
4.625
4.375
4.125
4.74
4.49
4.24
10
1
1
1
pF
kꢀ
3.75
5
6.25
AC ELECTRICAL CHARACTERISTICS
(-40LC to +85LC; VCC=5V M 10%)
PARAMETER
SYMBOL MIN
TYP
MAX
450
UNITS NOTES
Reset Active Time
VCC Detect to RST
VCC Slew Rate (4.75V - 4.00V)
VCC Slew Rate (4.00V - 4.75V)
VCC Detect to RST
tRST
tRPD
tF
250
350
ms
100
ns
300
0
ꢁs
ns
tR
tRPU
250
350
450
ms
NOTES:
1. All voltages are referenced to ground.
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DS1833
ECONORESET SELECTION GUIDE
VCC TRIP POINT
PUSHBUTTON DETECT
MIN
4.0
4.25
4.5
4.0
4.25
4.5
4.0
4.25
4.5
2.64
2.8
TYP
4.125
4.375
4.625
4.125
4.375
4.625
4.125
4.375
4.625
2.72
MAX
4.24
4.49
4.75
4.24
4.49
4.75
4.24
4.49
4.75
2.80
2.97
MIN
2.4
2.4
TYP
MAX
3.3
3.3
3.3
N/A
N/A
N/A
N/A
N/A
N/A
3.0
DS1233-15
DS1233-10
DS1233-5
DS1233D-15
DS1233D-10
DS1233D-5
DS1833-15
DS1833-10
DS1833-5
-
-
-
2.4
N/A
N/A
N/A
N/A
N/A
N/A
1.8
5V
DS1233A-15
DS1233A-10
-
-
3.3V
2.88
1.8
3.0
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