Maxim MAX800MEPE, MAX800MESE, MAX800MCSE, MAX800LCSE, MAX800LEPE Datasheet

_______________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
typ 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 out-
put that is valid with VCCdown 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

____________________________Features

♦ 200ms Power-OK/Reset Timeout Period
♦ 1µA Standby Current, 30µA Operating Current
♦ On-Board Gating of Chip-Enable Signals,

10ns Max Delay

♦ MaxCap™or SuperCap™Compatible
♦ Guaranteed

RREESSEETT

Assertion to V

CC

= +1V

♦ Voltage Monitor for Power-Fail or Low-Battery

Warning

♦ Power-Fail Accuracy Guaranteed to ±2%

(MAX800L/M)

♦ Available in 16-Pin Narrow SO and Plastic

DIP Packages

______________Ordering Information

Ordering Information continued on last page.

* Dice are specified at TA= +25°C, DC parameters only.

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

__________________Pin Configuration

MAX691A
MAX693A
MAX800L

MAX800M

V

OUT

VCCBATT 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 7a; 12/96

PART

MAX691ACPE

MAX691ACSE
MAX691ACWE 0°C to +70°C

0°C to +70°C

0°C to +70°C

TEMP. RANGE PIN-PACKAGE

16 Plastic DIP
16 Narrow SO
16 Wide SO

MAX691AC/D

MAX691AEJE -40°C to +85°C

0°C to +70°C Dice*

16 CERDIP

MAX691AEPE
MAX691AESE -40°C to +85°C

-40°C to +85°C 16 Plastic DIP
16 Narrow SO

MAX691AEWE -40°C to +85°C 16 Wide SO

MAX691AMJE -55°C to +125°C 16 CERDIP

SuperCap is a registered trademark of Baknor Industries. MaxCap is a registered trademark of The Carborundum Corp.

For free samples & the latest literature: http://www.maxim-ic.com, or phone [phone].
For small orders, phone [phone] ext. 3468.

TA= T

MIN

+ T

MIN

MAX691A/MAX693A/MAX800L/MAX800M

Microprocessor Supervisory Circuits

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(MAX691A, MAX800L: VCC= +4.75V to +5.5V, MAX693A, MAX800M: VCC= +4.5V to +5.5V, VBATT = 2.8V, TA= 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)

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

VBATT - 0.15

MAX69_AC, MAX800_C 0.8 1.2

VBATT = 4.5V, IOUT = 20mA

µA

-1.0 0.02

VBATT + 0.2V ≤ V

CC

VBATT Standby Current
(Note 3)

-0.1 0.02

µA

5

VCC< VBATT - 1.2V
VBATT = 2.8V

Supply Current in
Battery-Backup Mode
(Excludes I

OUT

) (Note 2)

VBATT = 2.8V, IOUT = 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

TA= +25°C

VCC> VBATT - 1V

TA= T

MIN

+ T

MIN

VBATT = 2.0V, IOUT = 5mA

TA= +25°C

TA= T

MIN

+ T

MIN

15

VBATT = 2.0V

VCC= 4.5V

I

OUT

= 250mA

VCC- 0.02 VCC- 0.05I

OUT

= 25mA

MAX69_AC/AE,
MAX800_C/E

I

OUT

= 210mA

VCC- 0.2 VCC- 0.35

VCC- 0.2 VCC- 0.3

V

VCC- 0.40

VCC- 0.17 VCC- 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

ΩVCC= 4.5VVCC-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

mA7 20

–
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

µs80VCCto 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, VCC= 5V

I

SINK

= 3.2mA, VCC= 4.25V

I

SINK

= 50µA, VCC= 1V, VBATT = 0V, VCCfalling

VIL= 0.8V, VIH= 0.75 x V

CC

Short period

Long period

Short period

Long period

MAX800M, TA= +25°C, VCCfalling

Power-up

Power-up

MAX800L, TA= +25°C, VCCfalling

Power-down

ELECTRICAL CHARACTERISTICS (continued)

(MAX691A, MAX800L: VCC= +4.75V to +5.5V, MAX693A, MAX800M: VCC= +4.5V to +5.5V, VBATT = 2.8V, TA= 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, VCC= 4.25V 0.4

LOW LINE Output Voltage

I

SOURCE

= 1µA, VCC= 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, VCC= 5V 3.5

V

WDO Output
Short-Circuit Current

Output source current 3 10 mA
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

MAX691A/MAX693A/MAX800L/MAX800M

Microprocessor Supervisory Circuits

4 _______________________________________________________________________________________

MAX69_AC/AE/AM, VCC= 5V

µA0.10 ±5OSC IN Leakage Current

µs12

RESET-to-CE OUT Delay

2.7

CE OUT Output Voltage High
(Reset Active)

3.5

ns6 10

CE IN-to-CE OUT Propagation
Delay (Note 8)

mA0.1 0.75 2.0

CE OUT Short-Circuit Current
(Reset Active)

Ω75 150

CE IN-to-CE OUT Resistance
(Note 7)

µA±0.005 ±1

CE IN Leakage Current

60

PFI-to-PFO Delay µs

25

µA1 15 100

PFO Output Short-Circuit
Current

MAX800_C/E, VCC= 5V

CONDITIONS

3.5

PFO Output Voltage

V

0.4

nA±0.01 ±25PFI Leakage Current

1.225 1.25 1.275

PFI Input Threshold V

1.2 1.25 1.3

UNITSMIN TYP MAXPARAMETER

OSC SEL = 0V

Power-down

VCC= 0V, VBATT = 2.8V, I

OUT

= 1µA

VCC= 5V, I

OUT

= -100µA

50Ω source impedance driver, C

LOAD

= 50pF

Disable mode, –CE OUT = 0V

Enable mode

Disable mode

I

SOURCE

= 1µA, VCC= 5V

I

SINK

= 3.2mA

VIN= 20mV, VOD= 15mV

VIN= -20mV, VOD= 15mV

Output source current

Note 1: Either VCCor VBATT can go to 0V, if the other is greater than 2.0V.
Note 2: The supply current drawn by the MAX691A/MAX800L/MAX800M from the battery excluding I

OUT

typically goes to 10µA

when (VBATT - 1V) < V

CC

< VBATT. In most applications, this is a brief period as VCCfalls through this region.

Note 3: “+” = battery-discharging current, “--” = battery-charging current.
Note 4: Although presented as typical values, the number of clock cycles for the reset and watchdog timeout periods are fixed and

do not vary with process or temperature.

Note 5: RESET is an open-drain output and sinks current only.
Note 6: WDI is internally connected to a voltage divider between V

OUT

and GND. If unconnected, WDI is driven to 1.6V (typ),

disabling the watchdog function.

Note 7: The chip-enable resistance is tested with V

CC

= +4.75V for the MAX691A/MAX800L and VCC= +4.5V for the

MAX693A/MAX800M. CE IN = CE OUT = V

CC

/ 2.

Note 8: The chip-enable propagation delay is measured from the 50% point at CE IN to the 50% point at CE OUT.

ELECTRICAL CHARACTERISTICS (continued)

(MAX691A, MAX800L: VCC= +4.75V to +5.5V, MAX693A, MAX800M: VCC= +4.5V to +5.5V, VBATT = 2.8V, TA= T

MIN

to T

MAX

,

unless otherwise noted.)

kHz50OSC IN Frequency Range

µA10 100OSC SEL Input Pull-Up Current

µA10 100OSC IN Input Pull-Up Current

OSC SEL = 0V

OSC SEL = 0V

OSC SEL = V

OUT

or floating, OSC IN = 0V

V

V

OUT

- 0.3 V

OUT

- 0.6V

IH

3.65 2.00

OSC IN External Oscillator
Threshold Voltage

V

IL

kHz100

OSC IN Frequency with
External Capacitor

OSC SEL = 0V, COSC = 47pF

V

POWER-FAIL COMPARATOR

CHIP-ENABLE GATING

INTERNAL OSCILLATOR

MAX691A/MAX693A/MAX800L/MAX800M

Microprocessor Supervisory Circuits

_______________________________________________________________________________________

5

36

26

-60 120 150

VCC SUPPLY CURRENT

vs. TEMPERATURE

(NORMAL OPERATING MODE)

34

MAX691A TOC-01

TEMPERATURE (°C)

V

CC

SUPPLY CURRENT (µA)

30

30

28

-30 0 90

32

60

V

CC

= 5V
VBATT = 2.8V
PFI, CE IN = 0V

0

-60 120 150

BATTERY SUPPLY CURRENT

vs. TEMPERATURE

(BATTERY-BACKUP MODE)

2

MAX691A TOC-02

TEMPERATURE (°C)

BATTERY SUPPLY CURRENT (µA)

30

1

0.5

-30 0 90

1.5

60

V

CC

= 5V
VBATT = 2.8V
NO LOAD

120

-60 120 150 180

CHIP-ENABLE ON-RESISTANCE

vs. TEMPERATURE

100

MAX691A TOC-03

TEMPERATURE (°C)

CE ON-RESISTANCE (Ω)

30

60

40

-30 0 90

80

60

V

CC

= 4.75V
VBATT = 2.8V
V

CE IN

= VCC/2

20

5

-60 120 150

VBATT to V

OUT

ON-RESISTANCE

vs. TEMPERATURE

MAX691A TOC-04

TEMPERATURE (°C)

VBATT-to-V

OUT

ON-RESISTANCE (Ω)

30

10

-30 0 90

15

60

V

CC

= 0V

VBATT = 2.8V

VBATT = 2.0V

VBATT = 4.5V

4.75

4.30

-60 120 150

RESET THRESHOLD
vs. TEMPERATURE

MAX691A TOC-07

TEMPERATURE (°C)

RESET THRESHOLD (V)

30

4.45

-30 0 90

4.65

4.40

4.35

4.50

4.70

4.55

4.60

60

VBATT = 2.8V

MAX691A
MAX800L

MAX693A
MAX800M

1.2

0.6

-60 120 150

V

CC

to V

OUT

ON-RESISTANCE

vs. TEMPERATURE

MAX691A TOC-05

TEMPERATURE (°C)

V

CC

-to-V

OUT

ON-RESISTANCE (Ω)

30

0.8

-30 0 90

1.0

0.7

0.9

1.1

60

VCC = 5V,
VBATT = 0V

1.50

0

-60 120 150

PFI THRESHOLD

vs. TEMPERATURE

MAX691A TOC-06

TEMPERATURE (°C)

PFI THRESHOLD (V)

30

0.50

-30 0 90

1.00

0.25

0.75

1.25

60

VCC = +5V,
VBATT = 0V
NO LOAD ON PFO

600

0

-60 120 150

RESET OUTPUT RESISTANCE

vs. TEMPERATURE

MAX691A TOC-08

TEMPERATURE (°C)

RESET OUTPUT RESISTANCE (Ω)

30

200

-30 0 90

100

500

300

400

60

VCC = 5V, VBATT = 2.8V
SOURCING CURRENT

VCC = 0V, VBATT = 2.8V
SINKING CURRENT

-60 120 150

RESET DELAY

vs. TEMPERATURE

230

MAX691A TOC-09

TEMPERATURE (°C)

RESET DELAY (ms)

30

190

170

-30 0 90

210

220

180

200

60

V

CC

= 0V TO 5V STEP
VBATT = 2.8V

__________________________________________Typical Operating Characteristics

(TA = +25°C, unless otherwise noted.)