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MAX691CWE+T

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17
General Description
The MAX691A/MAX693A/MAX800L/MAX800M micro-
processor (µP) supervisory circuits are pin-compatible
upgrades to the MAX691, MAX693, and MAX695. They
improve performance with 30µA supply current, 200ms
typ reset active delay on power-up, and 6ns chip-
enable propagation delay. Features include write pro-
tection of CMOS RAM or EEPROM, separate watchdog
outputs, backup-battery switchover, and a RESET out-
put that is valid with V
CC
down to 1V. The MAX691A/
MAX800L have a 4.65V typical reset-threshold voltage,
and the MAX693A/MAX800Ms’ reset threshold is 4.4V
typical. The MAX800L/MAX800M guarantee power-fail
accuracies to ±2%.
________________________Applications
Computers
Controllers
Intelligent Instruments
Automotive Systems
Critical µP Power Monitoring
____________________________Features
o 200ms Power-OK/Reset Timeout Period
o 1µA Standby Current, 30µA Operating Current
o On-Board Gating of Chip-Enable Signals,
10ns max Delay
o MaxCap
®
or SuperCap Compatible
o Guaranteed
RREESSEETT
Assertion to V
CC
= +1V
o Voltage Monitor for Power-Fail or Low-Battery
Warning
o Power-Fail Accuracy Guaranteed to ±2%
(MAX800L/M)
o Available in 16-Pin Narrow SO, Plastic
DIP, and TSSOP Packages
MAX691A/MAX693A/MAX800L/MAX800M
Microprocessor Supervisory Circuits
________________________________________________________________
Maxim Integrated Products
1
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
RESET
RESET
WDO
CE IN
GND
V
CC
V
OUT
VBATT
TOP VIEW
MAX691A
MAX693A
MAX800L
MAX800M
CE OUT
WDI
PFO
PFI
OSC SEL
OSC IN
LOW LINE
BATT ON
DIP/SO/TSSOP
Pin Configuration
MAX691A
MAX693A
MAX800L
MAX800M
V
OUT
V
CC
BATT ON
CE OUT
CE IN
WDI
PFO
RESET
VBATT
PFI
GND
OSC IN
OSC SEL
1
9
4
7
8
ADDRESS
DECODE
AUDIBLE
ALARM
5V
REGULATOR
+8V
0.1μF
CMOS RAM
2
12
11
10
15
13
5
3
A0-A15
I/O
NMI
RESET
μP
LOW LINE WDO
SYSTEM STATUS INDICATORS
NO
CONNECTION
0.47F*
1N4148
*MaxCap
614
Typical Operating Circuit
19-0094; Rev 11; 8/08
MaxCap is a registered trademark of Kanthal Globar, Inc.
Ordering Information continued on last page.
*
Dice are specified at T
A
= +25°C, DC parameters only.
Devices in PDIP, SO, and TSSOP packages are available in both
leaded and lead-free packaging. Specify lead free by adding
the + symbol at the end of the part number when ordering.
Lead free not available for CERDIP package.
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Ordering Information
PART TEMP RANGE
PIN -
PA C K A G E
MAX691ACUE -0°C to +70°C 16 TSSOP
MAX691ACSE -0°C to +70°C 16 Narrow SO
MAX691ACWE -0°C to +70°C 16 Wide SO
MAX691ACPE -0°C to +70°C 16 Plastic DIP
MAX691AC/D -0°C to +70°C Dice*
MAX691AEUE -0°C to +70°C 16 TSSOP
MAX691AESE -40°C to +85°C 16 Narrow SO
MAX691AEWE -40°C to +85°C 16 Wide SO
MAX691AEPE -40°C to +85°C 16 Plastic DIP
MAX691A/MAX693A/MAX800L/MAX800M
Microprocessor Supervisory Circuits
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(MAX691A, MAX800L: V
CC
= +4.75V to +5.5V; MAX693A, MAX800M: V
CC
= +4.5V to +5.5V; VBATT = 2.8V, T
A
= T
MIN
to T
MAX
,
unless otherwise noted.)
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.
Terminal Voltage (with respect to GND)
V
CC
.......................................................................-0.3V to +6V
VBATT...................................................................-0.3V to +6V
All Other Inputs .....................................-0.3V to (V
OUT
+ 0.3V)
Input Current
V
CC
Peak...........................................................................1.0A
V
CC
Continuous.............................................................250mA
VBATT Peak ..................................................................250mA
VBATT Continuous ..........................................................25mA
GND, BATT ON .............................................................100mA
All Other Outputs ............................................................25mA
Continuous Power Dissipation (T
A
= +70°C)
TSSOP (derate 6.70mW/°C above +70°C) ..................533mW
Narrow SO (derate 8.70mW/°C above +70°C) ...........696mW
Wide SO (derate 9.52mW/°C above +70°C)...............762mW
Plastic DIP (derate 10.53mW/°C above +70°C) ..........842mW
CERDIP (derate 10.00mW/°C above +70°C)..............800mW
Operating Temperature Ranges
MAX69_AC_ _/MAX800_C_ _ .............................0°C to +70°C
MAX69_AE_ _/MAX800_E_ _ ...........................-40°C to +85°C
MAX69_AMJE ................................................-55°C to +125°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10s) .................................+300°C
VBATT - 0.15
MAX69_AC, MAX800_C 0.8 1.2
VBATT = 4.5V, I
OUT
= 20mA
µA
-1.0 0.02
VBATT + 0.2V ≤ V
CC
VBATT Standby Current
(Note 3)
-0.1 0.02
µA
5
V
CC
< VBATT - 1.2V,
VBATT = 2.8V
Supply Current in
Battery-Backup Mode
(excludes I
OUT
) (Note 2)
VBATT = 2.8V, I
OUT
= 10mA
V0 5.5
CONDITIONS
Operating Voltage Range,
V
CC
, VBATT (Note 1)
VBATT = 4.5V
0.04 1
µA30 100
Supply Current in
Normal Operating Mode
(excludes I
OUT
)
V
V
OUT
in Battery-Backup
Mode
VBATT - 0.25
VBATT = 2.8V
Ω
30
VBATT - 0.3
VBATT-to-V
OUT
On-Resistance
UNITSMIN TYP MAXPARAMETER
25
T
A
= +25°C
V
CC
> VBATT - 1V
T
A
= T
MIN
+ T
MIN
VBATT = 2.0V, I
OUT
= 5mA
T
A
= +25°C
T
A
= T
MIN
+ T
MIN
15
VBATT = 2.0V
V
CC
= 4.5V
I
OUT
= 250mA
V
CC
- 0.02 V
CC
- 0.05I
OUT
= 25mA
MAX69_AC/AE,
MAX800_C/E
I
OUT
= 210mA
V
CC
- 0.2 V
CC
- 0.35
V
CC
- 0.2 V
CC
- 0.3
V
V
CC
- 0.40
V
CC
- 0.17 V
CC
- 0.3V
V
OUT
Output
MAX69_AE,
MAX800_C/E
MAX69_AC
MAX69_A/M
MAX69_AE, MAX800_E 0.8 1.4
MAX69_A/M 0.8 1.6
ΩV
CC
= 4.5VV
CC
-to-V
OUT
On-Resistance
V
VBATT - 0.3
Power-up
Battery Switchover
Threshold
VBATT + 0.3
Power-down
MAX691A/MAX693A/MAX800L/MAX800M
Microprocessor Supervisory Circuits
_______________________________________________________________________________________ 3
MAX691A, MAX800L
mA720
–
RESET Output Short-Circuit
Current
V
3.5
RESET Output Voltage
0.1 0.4
0.004 0.3
ns100
Minimum Watchdog Input
Pulse Width
Clock
Cycles
1024
Watchdog Timeout Period,
External Clock (Note 4)
4096
ms70 100 140
Watchdog Timeout Period,
Internal Oscillator
1.0 1.6 2.25
Clock
Cycles
2048
Reset Active Timeout Period,
External Clock (Note 4)
ms140 200 280
Reset Active Timeout Period,
Internal Oscillator
ns800
LOW LINE-to-RESET Delay
µs80V
CC
to RESET Delay
MAX693A, MAX800M
CONDITIONS
mV15Reset Threshold Hysteresis
V
4.30 4.45
Reset Threshold Voltage
4.55 4.70
4.25 4.40 4.50
4.50 4.65 4.75
UNITSMIN TYP MAXPARAMETER
Output source current
I
SOURCE
= 1.6mA, V
CC
= 5V
I
SINK
= 3.2mA, V
CC
= 4.25V
I
SINK
= 50µA, V
CC
= 1V, VBATT = 0V, V
CC
falling
V
IL
= 0.8V, V
IH
= 0.75 x V
CC
Short period
Long period
Short period
Long period
MAX800M, T
A
= +25°C, V
CC
falling
Power-up
Power-up
MAX800L, T
A
= +25°C, V
CC
falling
Power-down
ELECTRICAL CHARACTERISTICS (continued)
(MAX691A, MAX800L: V
CC
= +4.75V to +5.5V; MAX693A, MAX800M: V
CC
= +4.5V to +5.5V; VBATT = 2.8V, T
A
= T
MIN
to T
MAX
,
unless otherwise noted.)
RESET Output Voltage Low
(Note 5)
I
SINK
= 3.2mA 0.1 0.4 V
I
SINK
= 3.2mA, V
CC
= 4.25V 0.4
LOW LINE Output Voltage
I
SOURCE
= 1µA, V
CC
= 5V 3.5
V
LOW LINE Output
Short-Circuit Current
Output source current 1 15 100 µA
I
SINK
= 3.2mA 0.4
WDO Output Voltage
I
SOURCE
= 500µA, V
CC
= 5V 3.5
V
WDO Output
Short-Circuit Current
Output source current 310mA
V
IH
0.75 x V
CC
WDI Threshold Voltage
(Note 6)
V
IL
0.8
V
WDI = 0V -50 -10
WDI Input Current
WDI = V
OUT
20 50
µA
sec
mV60
Battery Switchover
Hysteresis
I
SINK
= 25mA
V
0.7 1.5
BATT ON Output
Low Voltage
I
SINK
= 3.2mA 0.1 0.4
Source current µA1 15 100
BATT ON Output
Short-Circuit Current
Sink current mA60
RESET AND WATCHDOG TIMER
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17

MAX691CWE+T

Mfr. #:
Buy MAX691CWE+T
Manufacturer:
Maxim Integrated
Description:
Supervisory Circuits MPU Supervisor
Lifecycle:
New from this manufacturer.
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