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