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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX800M Datasheet

Microprocessor Supervisory Circuits

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MAX800M pdf
19-0094; Rev 7a; 12/96
Microprocessor Supervisory Circuits
_______________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 VCC down to 1V. The MAX691A/
MAX800L have a 4.65V typical reset-threshold voltage,
and the MAX693A/MAX800M’s 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
__________Typical Operating Circuit
5V
REGULATOR
+8V
0.1µF
1N4148
0.47F*
NO
CONNECTION
3
VCC
1 VBATT
5
BATT ON VOUT 2
CE OUT 12
MAX691A
CMOS RAM
9
PFI
MAX693A
MAX800L
CE IN 13
ADDRESS
DECODE
MAX800M
4 GND
11
WDI
7 OSC IN
PFO 10
8 OSC SEL
RESET 15
LOW LINE WDO
A0-A15
I/O
µP
NMI
RESET
6 14
AUDIBLE
ALARM
*MaxCap
SYSTEM STATUS INDICATORS
____________________________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 MaxCapor SuperCapCompatible
o Guaranteed RESET Assertion to VCC = +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 and Plastic
DIP Packages
______________Ordering Information
PART
TEMP. RANGE
PIN-PACKAGE
MAX691ACPE
0°C to +70°C
16 Plastic DIP
MAX691ACSE
0°C to +70°C
16 Narrow SO
MAX691ACWE
0°C to +70°C
16 Wide SO
MAX691AC/D
0°C to +70°C
Dice*
MAX691AEPE
-40°C to +85°C
16 Plastic DIP
MAX691AESE
-40°C to +85°C
16 Narrow SO
MAX691AEWE -40°C to +85°C
16 Wide SO
MAX691AEJE
-40°C to +85°C
16 CERDIP
MAX691AMJE -55°C to +125°C 16 CERDIP
Ordering Information continued on last page.
* Dice are specified at TA = +25 °C, DC parameters only.
__________________Pin Configuration
TOP VIEW
VBATT 1
VOUT 2
VCC 3
GND 4
BATT ON 5
LOW LINE 6
OSC IN 7
OSC SEL 8
MAX691A
MAX693A
MAX800L
MAX800M
16 RESET
15 RESET
14 WDO
13 CE IN
12 CE OUT
11 WDI
10 PFO
9 PFI
DIP/SO
SuperCap is a registered trademark of Baknor Industries. MaxCap is a registered trademark of The Carborundum Corp.
________________________________________________________________ Maxim Integrated Products 1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 408-737-7600 ext. 3468.


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX800M Datasheet

Microprocessor Supervisory Circuits

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MAX800M pdf
Microprocessor Supervisory Circuits
ABSOLUTE MAXIMUM RATINGS
Terminal Voltage (with respect to GND)
VCC .......................................................................-0.3V to +6V
VBATT...................................................................-0.3V to +6V
All Other Inputs .....................................-0.3V to (VOUT + 0.3V)
Input Current
VCC Peak...........................................................................1.0A
VCC Continuous.............................................................250mA
VBATT Peak ..................................................................250mA
VBATT Continuous ..........................................................25mA
GND, BATT ON .............................................................100mA
All Other Outputs ............................................................25mA
Continuous Power Dissipation (TA = +70°C)
Plastic DIP (derate 10.53mW/°C above +70°C) ..........842mW
Narrow SO (derate 8.70mW/°C above +70°C) ...........696mW
Wide SO (derate 9.52mW/°C above +70°C)...............762mW
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, 10sec) .............................+300°C
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
(MAX691A, MAX800L: VCC = +4.75V to +5.5V, MAX693A, MAX800M: VCC = +4.5V to +5.5V, VBATT = 2.8V, TA = TMIN to TMAX,
unless otherwise noted.)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Operating Voltage Range,
VCC, VBATT (Note 1)
VOUT Output
VCC = 4.5V
IOUT = 25mA
MAX69_AC
IOUT = 250mA
MAX69_AE,
MAX800_C/E
MAX69_A/M
IOUT = 210mA
MAX69_AC/AE,
MAX800_C/E
0
5.5
VCC - 0.02 VCC - 0.05
VCC - 0.2 VCC - 0.3
VCC - 0.2 VCC - 0.35
VCC - 0.40
VCC - 0.17 VCC - 0.3V
V
V
VCC-to-VOUT On-Resistance VCC = 4.5V
MAX69_AC, MAX800_C
MAX69_AE, MAX800_E
0.8 1.2
0.8 1.4
VOUT in Battery-Backup
Mode
VBATT-to-VOUT
On-Resistance
Supply Current in
Normal Operating Mode
(Excludes IOUT)
Supply Current in
Battery-Backup Mode
(Excludes IOUT) (Note 2)
VBATT Standby Current
(Note 3)
Battery Switchover
Threshold
MAX69_A/M
VBATT = 4.5V, IOUT = 20mA
VBATT = 2.8V, IOUT = 10mA
VBATT = 2.0V, IOUT = 5mA
VBATT = 4.5V
VBATT = 2.8V
VBATT = 2.0V
VCC > VBATT - 1V
VCC < VBATT - 1.2V TA = +25°C
VBATT = 2.8V
TA = TMIN + TMIN
VBATT + 0.2V VCC
TA = +25°C
TA = TMIN + TMIN
Power-up
Power-down
TA = TMIN + TMIN
VBATT - 0.3
VBATT - 0.25
VBATT - 0.15
0.8
30
1.6
15
25
30
100
0.04 1
5
-0.1 0.02
-1.0 0.02
VBATT + 0.3
VBATT - 0.3
V
µA
µA
µA
V
2 _______________________________________________________________________________________


Part Number MAX800M
Description Microprocessor Supervisory Circuits
Maker Maxim Integrated
Total Page 16 Pages
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