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Part: MAX691AEUE
Category:
Power Management
-> Supervisory Circuits
-> Microprocessor Supervisors
Description: Microprocessor Supervisory Circuits
Company: Maxim Integrated Products
Datasheet: Download MAX691AEUE datasheet File size : 736 kB
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Datasheet text preview:
19-0094; Rev 9; 4/02
Microprocessor Supervisory Circuits
General Description
The MAX691A/MAX693A/MAX800L/MAX800M microprocessor (µP) supervisory circuits are pin-compatible upgrades to the MAX691, MAX693, and MAX695. They improve performance with 30µA supply current, 200ms t y p reset active delay on power-up, and 6ns chipenable propagation delay. Features include write protection of CMOS RAM or EEPROM, separate watchdog outputs, backup-battery switchover, and a RESET output that is valid with VCC 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%.
____________________________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 MaxCapTM or SuperCapTM Compatible 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, Plastic DIP, and TSSOP Packages
MAX691A/MAX693A/MAX800L/MAX800M
________________________Applications
Computers Controllers Intelligent Instruments Automotive Systems Critical µP Power Monitoring
Ordering Information
PART MAX691ACUE MAX691ACSE MAX691ACWE MAX691ACPE MAX691AC/D MAX691AEUE MAX691AESE MAX691AEWE MAX691AEPE MAX691AEJE MAX691AMJE TEMP. RANGE 0°C to +70°C 0°C to +70°C 0°C to +70°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -55°C to +125°C PIN-PACKAGE 16 TSSOP 16 Narrow SO 16 Wide SO 16 Plastic DIP Dice* 16 TSSOP 16 Narrow SO 16 Wide SO 16 Plastic DIP 16 CERDIP 16 CERDIP
Typical Operating Circuit
+8V 5V REGULATOR
0.1µF 3 VCC 1 VBATT CE OUT 0.47F* 9 4 7 NO CONNECTION 8 5 BATT ON
1N4148
VOUT
2 12 CMOS RAM
Ordering Information continued on last page. *Dice are specified at TA = +25 °C, DC parameters only.
Pin Configuration
ADDRESS DECODE A0-A15 I/O
MAX691A MAX693A CE IN 13 PFI MAX800L MAX800M
GND WDI OSC IN PFO 10 OSC SEL LOW LINE WDO 6 14 RESET 15 11
TOP VIEW
VBATT 1 VOUT 2 VCC 3 GND 4 BATT ON 5 LOW LINE 6 16 RESET 15 RESET 14 WDO
µP
NMI RESET AUDIBLE ALARM
MAX691A MAX693A MAX800L MAX800M
13 CE IN 12 CE OUT 11 WDI 10 PFO 9 PFI
OSC IN 7 OSC SEL 8
*MaxCap
SYSTEM STATUS INDICATORS
DIP/SO/TSSOP
SuperCap is a registered trademark of Baknor Industries. MaxCap is a registered trademark of The Carborundum Corp. ________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
Microprocessor Supervisory Circuits MAX691A/MAX693A/MAX800L/MAX800M
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) 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
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) IOUT = 25mA MAX69_AC VOUT Output VCC = 4.5V IOUT = 250mA MAX69_AE, MAX800_C/E MAX69_A/M IOUT = 210mA MAX69_AC/AE, MAX800_C/E VCC - 0.17 0.8 0.8 0.8 VBATT - 0.3 VBATT - 0.25 VBATT - 0.15 15 25 30 30 0.04 100 1 µA 5 -0.1 -1.0 VBATT + 0.3 VBATT - 0.3 0.02 0.02 µA V 0 VCC - 0.02 VCC - 0.2 VCC - 0.2 5.5 VCC - 0.05 VCC - 0.3 VCC - 0.35 VCC - 0.40 VCC - 0.3V 1.2 1.4 1.6 V V V
MAX69_AC, MAX800_C VCC-to-VOUT On-Resistance VCC = 4.5V MAX69_AE, MAX800_E
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 2
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 Power-up Power-down TA = +25°C TA = TMIN + TMIN
µA
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Microprocessor Supervisory Circuits
ELECTRICAL CHARACTERISTICS (continued)
(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 Battery Switchover Hysteresis BATT ON Output Low Voltage BATT ON Output Short-Circuit Current ISINK = 3.2mA ISINK = 25mA Sink current Source current CONDITIONS MIN TYP 60 0.1 0.7 60 15 4.65 4.40 0.4 1.5 100 4.75 4.50 4.70 4.45 15 Power-down 80 800 140 200 2048 1.0 70 1.6 100 4096 1024 2.25 140 280 mV µs ns ms Clock Cycles sec ms Clock Cycles ns 0.004 0.1 3.5 7 0.1 0.4 0.4 3.5 1 15 100 0.4 3.5 3 0.75 x VCC 0.8 -50 -10 20 50 10 20 mA V V µA V mA V µA 3 0.3 0.4 V MAX UNITS mV V mA µA
MAX691A/MAX693A/MAX800L/MAX800M
1 4.50 4.25 4.55 4.30
RESET AND WATCHDOG TIMER MAX691A, MAX800L Reset Threshold Voltage MAX693A, MAX800M MAX800L, TA = +25°C, VCC falling MAX800M, TA = +25°C, VCC falling Reset Threshold Hysteresis VCC to RESET Delay LOW LINE-to-RESET Delay Reset Active Timeout Period, Power-up Internal Oscillator Reset Active Timeout Period, Power-up External Clock (Note 4) Watchdog Timeout Period, Internal Oscillator Watchdog Timeout Period, External Clock (Note 4) Minimum Watchdog Input Pulse Width RESET Output Voltage Long period Short period Long period Short period VIL = 0.8V, VIH = 0.75 x VCC ISINK = 50µA, VCC = 1V, VBATT = 0V, VCC falling ISINK = 3.2mA, VCC = 4.25V ISOURCE = 1.6mA, VCC = 5V
100
V
RESET Output Short-Circuit Output source current Current RESET Output Voltage Low ISINK = 3.2mA (Note 5) LOW LINE Output Voltage LOW LINE Output Short-Circuit Current WDO Output Voltage WDO Output Short-Circuit Current WDI Threshold Voltage (Note 6) WDI Input Current ISINK = 3.2mA, VCC = 4.25V ISOURCE = 1µA, VCC = 5V Output source current ISINK = 3.2mA ISOURCE = 500µA, VCC = 5V Output source current VIH VIL WDI = 0V WDI = VOUT
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