MAX699CWE+T [MAXIM]
Power Supply Support Circuit, Fixed, 1 Channel, +4.65VV, CMOS, PDSO16, ROHS COMPLIANT, SO-16;
| 型号： | MAX699CWE+T |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Power Supply Support Circuit, Fixed, 1 Channel, +4.65VV, CMOS, PDSO16, ROHS COMPLIANT, SO-16 光电二极管 |
| 文件： | 总5页 (文件大小：350K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MAX698/MAX699
Low-Cost, Power-On Reset
and Watchdog Controllers
General Description
Features
The MAX698/MAX699 monitor the +5V supply in micro-
processor (μP) and digital systems. They supply a
RESET pulse of at least 140ms duration on power-up,
power-down, and during low-voltage brownout conditions.
Circuit reliability is increased at reduced cost by eliminat-
ing all external components and adjustments.
● Precision Voltage Monitor
● Power-OK/Reset Time Delay
● Watchdog Timer
● Minimum Component Count
Ordering Information
The MAX699 includes all features of the MAX698, but
also provides a watchdog input to monitor microproces-
sor activity. The RESET output goes low if the watchdog
input (WDI) is not toggled within 1 second. The watchdog
feature can be disabled by leaving WDI open.
*
PART
TEMP RANGE
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
8 PDIP
MAX698CPA
MAX698CWE
MAX698EPA
MAX698EWE
MAX699CPA
MAX699CWE
MAX699EPA
MAX699EWE
16 Wide SO
8 PDIP
16 Wide SO
8 PDIP
Both parts are supplied in 8-lead PDIP and 16-lead 0.3in
wide small outline (SO) packages and are specified from
0°C to +70°C for C grade devices and -40°C to +85°C
for E devices. The SO versions, with more pins than the
8-lead PDIP, have additional outputs not available in DIP
packages. These are RESET (without inversion) and
watchdog output (WDO).
16 Wide SO
8 PDIP
16 Wide SO
*Devices are available in both leaded and lead(Pb)-free pack-
aging. Specify lead free by adding the + symbol at the end of
the part number when ordering.
Applications
● Computers
● Controllers
Pin Configuration
TOP VIEW
+
● Intelligent Instruments
● Critical μP Power Monitoring
V
1
2
3
4
8
7
6
5
GND
CC
V
RESET
N.C. (WDI)*
N.C.
CC
MAX698
MAX699*
GND
GND
Typical Operating Circuit
+5V
+5V
DIP
1
2
3
4
5
6
7
8
16
RESET
GND
1
2
3
4
8
7
6
5
V
V
GND
RESET
N.C.
CC
V
15 RESET
CC
14
V
N.C. (WDO)*
CC
MAX698
MAX699*
CC
13 N.C.
12 N.C.
GND
N.C.
N.C.
N.C.
N.C.
MAX698
TO P
RESET
INPUT
GND
GND
11
10
9
N.C. (WDI)*
N.C.
N.C.
GND
SO
* PIN LABELS IN ( ) ARE FOR MAX699 ONLY
19-2349; Rev 5; 9/14
MAX698/MAX699
Low-Cost, Power-On Reset
and Watchdog Controllers
Absolute Maximum Ratings
V
.......................................................................-0.3V to +6.0V
Power Dissipation (T = +70°C)
CC
A
Input Voltage (with respect to GND)
8-Pin PDIP (derated 5mW/°C above +70°C)...............400mW
WDI, WDO, RESET, RESET.................................. -0.3V to V
Operating Temperature Range
C Suffix...............................................................0°C to +70°C
E Suffix ........................................................... -40°C to +85°C
16-Pin SO (derated 7mW/°C above +70°C)................600mW
Storage Temperature Range ........................... -65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
CC
Rate of Rise, V
..........................................................100V/μs
CC
Stresses beyond 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 in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
Electrical Characteristics
(V
= +5V, T = +25°C, unless otherwise noted.)
CC
A
PARAMETER
CONDITIONS
MIN
TYP
MAX
5.5
5
UNITS
V
Operating Voltage Range
T
= full
3.0
A
Supply Current
mA
V
Power-Up Reset Deassertion
Power-Up Reset Assertion
Hysteresis
T
T
= full
= full
4.50
4.4
4.65
40
4.75
A
V
A
mV
ms
Reset Output Pulse Width
140
3.5
3.5
3.5
500
0.4
Output low
Output high
Output low
Output high
Output low
Output high
I
I
I
I
I
I
= 1.6mA, V
= 4.4V
SINK
CC
V
V
V
RESET OUTPUT (Open Drain)
= 1μA, V
= 5V
SOURCE
CC
CC
CC
= 1.6mA, V
= 5V
0.4
0.4
SINK
CC
RESET OUTPUT (SO Package
Only)
= 1μA, V
= 4.4V
SOURCE
= 1.6mA, V
= 5V
SINK
CC
WDO Output (MAX699 SO
Package Only)
= 1μA, V
= 4.4V
SOURCE
MAX699 Watchdog Timeout
Period
s
MAX699 Minimum WDI Input
Pulse Width
ns
Logic-low
Logic-high
0.8
50
MAX699 WDI Input Threshold
V
= +5V
V
CC
3.8
-50
WDI = V
20
CC
MAX699 WDI Input Current
µA
WDI = 0V
-15
Maxim Integrated
│ 2
www.maximintegrated.com
MAX698/MAX699
Low-Cost, Power-On Reset
and Watchdog Controllers
Pin Configuration
PIN
NAME
FUNCTION
SO
1, 4, 9
PDIP
3, 4, 8
1, 2
GND
Chip Power Ground
2, 3
V
+5V Sense Input and MAX698/MAX699 Chip Power
No Connection
CC
5–8, 10–14
5, 6
N.C.
(MAX699 Only.) A three-level input. If WDI remains high or low for more
than the watchdog timeout period, RESET pulses low (WDO also goes
low on the MAX699 SO package). If WDI is unconnected, the watchdog
circuit is disabled.
11
14
6
WDI (MAX699 Only)
(MAX699 Only.) Goes low when WDI remains high or low for more
than the watchdog timeout period. WDO is set high at the next WDI
transition. If WDI is unconnected or at midsupply, WDO remains high.
—
WDO (MAX699 Only)
WDO also remains high when V
falls below 4.4V.
CC
Goes low when V
Electrical Characteristics table).
falls below internally set threshold (see the
CC
15
16
7
RESET
—
RESET
Goes high when V falls below internally set threshold.
CC
Pin Description
WATCHDOG
TIMER
WDI*
WDO*
RESET
TIMER
RESET
V
CC
RESET*
V
CC
POWER-ON
RESET
MAX698
MAX699
4.65V
*WDI ON MAX699 ONLY
RESET ON SO PACKAGE ONLY
WDO ON SO MAX699 ONLY
GND
Maxim Integrated
│ 3
www.maximintegrated.com
MAX698/MAX699
Low-Cost, Power-On Reset
and Watchdog Controllers
Package Information
Chip Topography
For the latest package outline information and land patterns
(footprints), go to www.maximintegrated.com/packages. Note
that a “+”, “#”, or “-” in the package code indicates RoHS status
only. Package drawings may show a different suffix character, but
the drawing pertains to the package regardless of RoHS status.
PACKAGE
TYPE
PACKAGE OUTLINE
LAND
PATTERN NO.
CODE
NO.
8 PDIP
P8-2
21-0043
21-0042
—
16 Wide SO
W16-1
90-0107
Maxim Integrated
│ 4
www.maximintegrated.com
MAX698/MAX699
Low-Cost, Power-On Reset
and Watchdog Controllers
Revision History
REVISION REVISION
PAGES
CHANGED
DESCRIPTION
NUMBER
DATE
4
5/13
Corrected WDI SO pin number in Pin Description
3
5
9/14
No /V OPNs; removed automotive reference from Applications
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses
are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits)
shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
©
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
2014 Maxim Integrated Products, Inc.
│ 5
相关型号：
MAX699EWE+T
Power Supply Support Circuit, Fixed, 1 Channel, +4.65VV, CMOS, PDSO16, ROHS COMPLIANT, SO-16
MAXIM
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